FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See section 10, rule 13)
“TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEPTION
DEVICE, AND RECEPTION METHOD”
SONY CORPORATION, of 1-7-1, Konan, Minato-ku, Tokyo 108-
0075, Japan
The following specification particularly describes the
invention and the manner in which it is to be performed.
2
DESCRIPTION
TRANSMISSION APPARATUS, TRANSMISSION METHOD, RECEPTION
APPARATUS, AND RECEPTION METHOD
5 TECHNICAL FIELD
[0001]
The present technology relates to a transmission
apparatus, a transmission method, a reception apparatus, and
a reception method, and in particular to a transmission
10 apparatus or the like that transmits transmission video data
obtained by applying high dynamic range opto-electronic
conversion to high dynamic range video data.
BACKGROUND ART
15 [0002]
Conventionally, it is considered to transmit
transmission video data obtained by applying high dynamic range
opto-electronic conversion to high dynamic range video data.
Hereinafter, the high dynamic range is referred to as "HDR"
20 as appropriate. For example, Non-Patent Document 1 describes
an HDR opto-electronic transfer characteristic (new gamma
characteristic) including a region compatible with a
conventional opto-electronic transfer characteristic (gamma
characteristic) considering reception by a conventional
25 receiver.
CITATION LIST
NON-PATENT DOCUMENT
[0003]
30 Non-Patent Document 1: Tim Borer, “Non-Linear Opto-Electrical
Transfer Functions for High Dynamic Range Television”,
3
Research & Development White Paper WHP 283, July 2014
SUMMARY OF THE INVENTION
PROBLEMS TO BE SOLVED BY THE INVENTION
5 [0004]
For example, when transmitting transmission video data
obtained by using the above-described HDR opto-electronic
transfer characteristic including the region compatible with
the conventional opto-electronic transfer characteristic, it
10 is necessary that the conventional receiver should be able
to determine that the opto-electronic transfer characteristic
is similar to conventional one, and that an HDR-compatible
receiver should be able to determine that the opto-electronic
transfer characteristic is the HDR opto-electronic transfer
15 characteristic.
[0005]
An object of the present technology is to enable both
the conventional receiver and the HDR-compatible receiver to
well perform electro-optical conversion processing on the
20 transmission video data obtained by using the HDR
opto-electronic transfer characteristic.
SOLUTIONS TO PROBLEMS
[0006]
25 A concept of the present technology lies in
a transmission apparatus including:
an opto-electronic conversion unit configured to
perform high dynamic range opto-electronic conversion on high
dynamic range video data to obtain transmission video data;
30 an encoding unit configured to perform encoding
processing on the transmission video data to obtain video
4
stream;
a transmission unit configured to transmit a container
of a predetermined format including the video stream; and
an information insertion unit configured to insert
5 metadata information indicating a standard dynamic range
opto-electronic transfer characteristic into a layer of the
video stream, and to insert metadata information indicating
the high dynamic range opto-electronic transfer
characteristic into at least one of the layer of the video
10 stream and a layer of the container.
[0007]
In the present technology, the opto-electronic
conversion unit performs high dynamic range opto-electronic
conversion on the high dynamic range video data to obtain the
15 transmission video data. In this case, for example, a high
dynamic range opto-electronic transfer characteristic (new
gamma characteristic) including a region compatible with the
conventional opto-electronic transfer characteristic (gamma
characteristic) may be used.
20 [0008]
The encoding unit performs encoding processing on the
transmission video data to obtain the video stream. The
transmission unit transmits the container of a predetermined
format including this video stream. For example, the
25 container may be a transport stream (MPEG-2 TS) employed by
digital broadcasting standards. In addition, for example,
the container may be a container in a format of MP4 used for
distribution on the Internet or the like, or a container in
a format other than MP4.
30 [0009]
The information insertion unit inserts the metadata
5
information indicating the standard dynamic range
opto-electronic transfer characteristic into the layer of the
video stream, and inserts the metadata information indicating
the high dynamic range opto-electronic transfer
5 characteristic into at least one of the layer of the video
stream and the layer of the container.
[0010]
For example, when inserting the metadata information
indicating the high dynamic range opto-electronic transfer
10 characteristic into the layer of the video stream, the
information insertion unit may insert the metadata information
indicating the standard dynamic range opto-electronic
transfer characteristic into a first region in the video stream,
and insert the metadata information indicating the high dynamic
15 range opto-electronic transfer characteristic into a second
region different from the first region in the video stream.
In this case, for example, the first region may be a region
of an SPS NAL unit, and the second region may be a region of
an SEI NAL unit.
20 [0011]
In addition, for example, the container may be a
transport stream, and when inserting the metadata information
indicating the high dynamic range opto-electronic transfer
characteristic into the layer of the container, the information
25 insertion unit may insert this metadata information under a
program map table. In addition, for example, the container
may be a transport stream, and when inserting the metadata
information indicating the high dynamic range opto-electronic
transfer characteristic into the layer of the container, the
30 information insertion unit may insert this metadata
information under an event information table.
6
[0012]
In this way, in the present technology, the metadata
information indicating the standard dynamic range
opto-electronic transfer characteristic is inserted into the
5 layer of the video stream, and the metadata information
indicating the high dynamic range opto-electronic transfer
characteristic is inserted into at least one of the layer of
the video stream and the layer of the container.
[0013]
10 Accordingly, both of a conventional receiver and an
HDR-compatible receiver can well perform electro-optical
conversion processing on the transmission video data obtained
by using an HDR opto-electronic transfer characteristic.
That is, the conventional receiver can determine that the
15 opto-electronic transfer characteristic is similar to
conventional one on the basis of the metadata information
indicating the standard dynamic range opto-electronic
transfer characteristic. In addition, the HDR-compatible
receiver can determine that the opto-electronic transfer
20 characteristic is the HDR opto-electronic transfer
characteristic on the basis of the metadata information
indicating the high dynamic range opto-electronic transfer
characteristic.
[0014]
25 In addition, in the present technology, for example,
the information insertion unit may insert metadata information
for display control together with the metadata information
indicating the high dynamic range opto-electronic transfer
characteristic. In this case, for example, the metadata
30 information for display control may include peak brightness
information. In addition, for example, the metadata
7
information for display control may include region information
indicating a region in which brightness conversion is permitted.
In this case, the HDR-compatible receiver can perform display
brightness control appropriately by using this metadata
5 information for display control.
[0015]
In addition, another concept of the present technology
lies in
a reception apparatus including:
10 a reception unit configured to receive a container
including a video stream obtained through encoding of
transmission video data;
a decoding unit configured to perform decoding
processing on the video stream to obtain the transmission video
15 data; and
an electro-optical conversion unit configured to
perform electro-optical conversion on the transmission video
data to obtain video data for display,
wherein when metadata information indicating a standard
20 dynamic range opto-electronic transfer characteristic is
inserted into a layer of the video stream and metadata
information indicating the high dynamic range opto-electronic
transfer characteristic is inserted into at least one of the
layer of the video stream and a layer of the container, on
25 the basis of the metadata information indicating the high
dynamic range opto-electronic transfer characteristic, the
electro-optical conversion unit performs high dynamic range
electro-optical conversion with a characteristic opposite to
the high dynamic range opto-electronic transfer
30 characteristic on the transmission video data to obtain the
video data for display.
8
[0016]
In the present technology, the reception unit receives
the container including the video stream obtained through
encoding of the transmission video data. The decoding unit
5 performs decoding processing on the video stream to obtain
the transmission video data. Then, the electro-optical
conversion unit performs electro-optical conversion on the
transmission video data to obtain the video data for display.
[0017]
10 When the metadata information indicating the standard
dynamic range opto-electronic transfer characteristic is
inserted into the layer of the video stream and the metadata
information is inserted into at least one of the layer of the
video stream and the layer of the container, on the basis of
15 this metadata information indicating the high dynamic range
opto-electronic transfer characteristic, the electro-optical
conversion unit performs high dynamic range electro-optical
conversion with a characteristic opposite to this high dynamic
range opto-electronic transfer characteristic on the
20 transmission video data to obtain the video data for display.
[0018]
In this way, the present technology enables the high
dynamic range electro-optical conversion to be appropriately
performed on the transmission video data obtained using the
25 high dynamic range opto-electronic transfer characteristic
to obtain the high dynamic range video data that is good as
video data for display.
[0019]
Note that the present technology may further include,
30 for example, a brightness adjustment unit configured to perform
display brightness adjustment on the video data for display.
9
When the metadata information for display control is inserted
together with the metadata information indicating the high
dynamic range opto-electronic transfer characteristic, the
brightness adjustment unit may perform display brightness
5 adjustment on the video data for display on the basis of this
metadata information for display control. In this case, for
example, the metadata information for display control may
include region information indicating a region in which
brightness conversion is permitted, and the brightness
10 adjustment unit may perform the display brightness adjustment
in the region in which brightness conversion is permitted.
In this case, the display brightness adjustment can be
performed appropriately.
15 EFFECTS OF THE INVENTION
[0020]
The present technology enables both the conventional
receiver and the HDR-compatible receiver to well perform
electro-optical conversion processing on the transmission
20 video data obtained by using the HDR opto-electronic transfer
characteristic. It is to be noted that the effect described
in the present specification is only illustrative and not
restrictive, and may have additional effects.
25 BRIEF DESCRIPTION OF DRAWINGS
[0021]
Fig. 1 is a block diagram illustrating a configuration
example of a transmission and reception system as an
embodiment.
30 Fig. 2 is a block diagram illustrating a configuration
example of a transmission apparatus that constitutes the
10
transmission and reception system.
Fig. 3 is a diagram for describing an HDR opto-electronic
transfer characteristic.
Fig. 4 is a diagram illustrating an access unit of a
5 head of GOP when an encoding method is HEVC.
Fig. 5 is a diagram illustrating the access unit other
than the head of GOP when the encoding method is HEVC.
Fig. 6 is a diagram illustrating a structural example
of a dynamic range SEI message.
10 Fig. 7 is a diagram illustrating content of major
information in the structural example of the dynamic range
SEI message.
Fig. 8 is a diagram illustrating a structural example
of a video dynamic range descriptor.
15 Fig. 9 is a diagram illustrating a configuration example
of a transport stream TS.
Fig. 10 is a block diagram illustrating a configuration
example of a conventional HDR-incompatible reception
apparatus that constitutes the transmission and reception
20 system.
Fig. 11 is a block diagram illustrating a configuration
example of an HDR-compatible reception apparatus that
constitutes the transmission and reception system.
Fig. 12 is a diagram for describing an SDR
25 electro-optical transfer characteristic, SDR display mapping
processing, an HDR electro-optical transfer characteristic,
HDR display mapping processing, and the like.
Fig. 13 is a block diagram illustrating another
configuration example of the transmission and reception
30 system.
Fig. 14 is a diagram illustrating a structural example
11
of seventh and subsequent bytes of a packet of "Vender Specific
InfoFrame" to be sent from a set top box to a monitor when
compatible with SDR.
Fig. 15 is a diagram illustrating a structural example
5 of the seventh and subsequent bytes of the packet of "Vender
Specific InfoFrame" to be sent from the set top box to the
monitor when compatible with HDR.
Fig. 16 is a diagram illustrating content of major
information in each structural example of the packet of "Vender
10 Specific InfoFrame."
MODE FOR CARRYING OUT THE INVENTION
[0022]
Hereinafter, a mode for carrying out the invention
15 (hereinafter referred to as "embodiment") will be described.
Note that the description will be provided in the following
order.
1. Embodiment
2. Variations
20 [0023]
<1. Embodiment>
[Configuration example of transmission and reception system]
Fig. 1 illustrates a configuration example of a
transmission and reception system 10 as an embodiment. This
25 transmission and reception system 10 includes a transmission
apparatus 100 and reception apparatuses 200, 300. The
reception apparatus 200 is a reception apparatus that is
compatible with a conventional standard dynamic range (SDR)
and that is not compatible with a high dynamic range (HDR).
30 The reception apparatus 300 is an HDR-compatible reception
apparatus.
12
[0024]
The transmission apparatus 100 generates a transport
stream TS of MPEG 2 as a container, and places this transport
stream TS on a broadcast wave or a network packet and transmits
5 the transport stream TS. This transport stream TS includes
a video stream obtained by performing encoding processing on
transmission video data obtained by performing HDR
opto-electronic conversion on HDR video data.
[0025]
10 Metadata information indicating an SDR opto-electronic
transfer characteristic (gamma characteristic) is inserted
into a layer of the video stream. In addition, metadata
information indicating an HDR opto-electronic transfer
characteristic (new gamma characteristic) is inserted into
15 at least one of a layer of the video stream and a layer of
the container. In addition, in this embodiment, together with
this metadata information indicating the HDR opto-electronic
transfer characteristic, metadata information for display
control is inserted. This metadata information for display
20 control includes peak brightness information and region
information indicating a region in which brightness conversion
is permitted.
[0026]
The reception apparatus 200 performs decoding
25 processing on the video stream included in the received
container to obtain the transmission video data. The
reception apparatus 200 can determine that the opto-electronic
transfer characteristic is similar to conventional one on the
basis of the metadata information indicating the SDR
30 opto-electronic transfer characteristic inserted into the
video stream. The reception apparatus 200 performs SDR
13
electro-optical conversion with a characteristic opposite to
the SDR opto-electronic transfer characteristic on the
transmission video data to obtain video data for display. In
addition, the reception apparatus 200 performs display mapping
5 processing, that is, display brightness adjustment, on the
video data for display, on the basis of peak brightness (100
cd/m2), display maximum brightness of a monitor, and the like.
[0027]
The reception apparatus 300 performs decoding
10 processing on the video stream included in the received
container to obtain the transmission video data. The
reception apparatus 300 can determine that the opto-electronic
transfer characteristic is the HDR opto-electronic transfer
characteristic on the basis of the metadata information
15 indicating the HDR opto-electronic transfer characteristic
inserted into at least one of the layer of the video stream
and the layer of the container. The reception apparatus 300
performs the HDR electro-optical conversion with a
characteristic opposite to the HDR opto-electronic transfer
20 characteristic on the transmission video data to obtain the
video data for display. In addition, the reception apparatus
300 performs the display mapping processing, that is, the
display brightness adjustment, on the video data for display
on the basis of the metadata information for display control
25 inserted together with the metadata information indicating
the HDR opto-electronic transfer characteristic.
[0028]
"Configuration example of transmission apparatus"
Fig. 2 illustrates a configuration example of the
30 transmission apparatus 100. This transmission apparatus 100
includes a control unit 101, an HDR camera 102, an HDR
14
opto-electronic conversion unit 103, a video encoder 104, a
system encoder 105, and a transmission unit 106. The control
unit 101 includes a central processing unit (CPU), and controls
an operation of each unit of the transmission apparatus 100
5 on the basis of a control program.
[0029]
The HDR camera 102 captures a subject and outputs high
dynamic range (HDR) video data. This HDR video data has a
contrast ratio of 0 to 100%  N (N is a number larger than
10 1) exceeding brightness of a white peak of a conventional SDR
image, for example, 0 to 1000%. Here, a level of 100%
corresponds to, for example, a brightness value of white, 100
cd/m2.
[0030]
15 A master monitor 103a is a monitor for performing grading
on the HDR video data obtained by the HDR camera 102. This
master monitor 103a has a display brightness level that is
compatible with the HDR video data or that is suitable for
performing grading on the HDR video data.
20 [0031]
The HDR opto-electronic conversion unit 103 applies the
HDR opto-electronic transfer characteristic to the HDR video
data obtained by the HDR camera 102 to obtain transmission
video data V1. A solid line a of Fig. 3 is an HDR OETF curve
25 indicating the HDR opto-electronic transfer characteristic.
In addition, a dashed line b of Fig. 3 is an SDR OETF curve
indicating the SDR opto-electronic transfer characteristic.
In this diagram, a horizontal axis represents an input
brightness level whereas a vertical axis represents a
30 transmission code value.
[0032]
15
The HDR opto-electronic transfer characteristic
includes a region compatible with the SDR opto-electronic
transfer characteristic. That is, the curves of both
characteristics match until the input brightness level becomes
5 a compatibility limit value of both characteristics. When
the input brightness level is the compatibility limit value,
the transmission code value is a compatibility level SP. In
the HDR opto-electronic transfer characteristic, when the
input brightness level is a peak brightness PL, the
10 transmission code value is a peak level MP.
[0033]
An HDR display reference threshold CL indicates a
boundary between a region in which matching is performed as
brightness to be displayed on the monitor (CE monitor) on a
15 receiver side and a CE monitor dependent region. When the
input brightness level is a compatibility limit value CL, the
transmission code value is a threshold level CP. Note that
in the SDR opto-electronic transfer characteristic, when the
input brightness level is an SDR characteristic representation
20 limit brightness SL, the transmission code value is a peak
level MP. Here, SL is 100 cd/m2.
[0034]
Returning to Fig. 2, the video encoder 104 performs
encoding, for example, MPEG4-AVC or HEVC and the like on the
25 transmission video data V1 to obtain encoded video data. In
addition, this video encoder 104 generates a video stream
including this encoded video data (video elementary stream)
by a stream formatter (not illustrated) provided in a
subsequent stage.
30 [0035]
At this time, the video encoder 104 inserts the metadata
16
information indicating the SDR opto-electronic transfer
characteristic into the layer of the video stream. That is,
the video encoder 104 inserts metadata information "Transfer
characteristics 1" into a region of video usability information
5 (VUI) of an SPS NAL unit of an access unit (AU).
[0036]
In addition, the video encoder 104 inserts the metadata
information indicating the HDR opto-electronic transfer
characteristic and the metadata information for display
10 control into the layer of the video stream. That is, the video
encoder 104 inserts a newly defined dynamic range SEI message
into an "SEIs" section of the access unit (AU).
[0037]
Fig. 4 illustrates an access unit of a head of group
15 of pictures (GOP) when an encoding method is HEVC. In addition,
Fig. 5 illustrates the access unit other than the head of GOP
when the encoding method is HEVC. For the HEVC encoding method,
an SEI message group for decoding "Prefix_SEIs" is arranged
before slices in which pixel data is encoded, and after these
20 slices, an SEI message group for display "Suffix_SEIs" is
arranged. As illustrated in Fig. 4, Fig. 5, the dynamic range
SEI message is arranged as the SEI message group "Suffix_SEIs."
[0038]
Fig. 6 illustrates a structural example (syntax) of the
25 dynamic range SEI message. Fig. 7 illustrates content of major
information (semantics) in the structural example. An
eight-bit field of "transfer_characteristics2" designates
the HDR opto-electronic transfer characteristic. An
eight-bit field of "number_of_bits" represents the number of
30 bits of encoded pixel.
[0039]
17
A 16-bit field of "minimum_brightness_value"
represents minimum level brightness (cd/m2). A 16-bit field
of "peak_level" represents a maximum level relative value (%).
A 16-bit field of "peak_level_brightness" represents maximum
5 level brightness (cd/m2), and corresponds to the peak
brightness PL in Fig. 3.
[0040]
A 16-bit field of "compliant_threshold_level"
represents a threshold (%) at a time of display level mapping.
10 A 16-bit field of "compliant_threshold_level_value"
represents brightness (cd/m2) that serves as the threshold
at a time of display level mapping, and corresponds to the
HDR display reference threshold CL in Fig. 3.
[0041]
15 Returning to Fig. 2, the system encoder 105 generates
the transport stream TS including the video stream VS generated
by the video encoder 104. Then, the transmission unit 106
places this transport stream TS on a broadcast wave or a network
packet and transmits the transport stream TS to the reception
20 apparatuses 200, 300.
[0042]
An operation of the transmission apparatus 100
illustrated in Fig. 2 will be described briefly. The HDR video
data obtained through capturing by the HDR camera 102 is
25 supplied to the HDR opto-electronic conversion unit 103. The
HDR video data obtained by the HDR camera 102 undergoes grading
using the master monitor 103a. This HDR opto-electronic
conversion unit 103 applies the HDR opto-electronic transfer
characteristic (HDR OETF curve) to this HDR video data to
30 perform opto-electronic conversion, and obtains the
transmission video data V1. This transmission video data V1
18
is supplied to the video encoder 104.
[0043]
The video encoder 104 performs encoding such as, for
example, MPEG4-AVC or HEVC on the transmission video data V1
5 to obtain the encoded video data. In addition, this video
encoder 104 generates the video stream including this encoded
video data by the stream formatter provided in a subsequent
stage.
[0044]
10 At this time, the video encoder 104 inserts the metadata
information indicating the SDR opto-electronic transfer
characteristic into the layer of the video stream. That is,
the video encoder 104 inserts the metadata information
"Transfer characteristics 1" into the VUI region of the SPS
15 NAL unit of the access unit (AU).
[0045]
In addition, the video encoder 104 inserts the metadata
information indicating the HDR opto-electronic transfer
characteristic and the metadata information for display
20 control into the layer of the video stream. That is, the video
encoder 104 inserts the newly defined dynamic range SEI message
into the "SEIs" section of the access unit (AU).
[0046]
The video stream VS generated by the video encoder 104
25 is supplied to the system encoder 105. This system encoder
105 generates the MPEG-2 transport stream TS including the
video stream. The transmission unit 106 places this transport
stream TS on a broadcast wave or a network packet and transmits
the transport stream TS to the reception apparatuses 200, 300.
30 [0047]
Note that the foregoing description has indicated an
19
example in which the metadata information indicating the HDR
opto-electronic transfer characteristic and the metadata
information for display control are inserted into the layer
of the video stream. Since the dynamic range SEI message can
5 be sent for each picture in the most frequent case, it is also
possible to change the metadata information for each picture.
Alternatively, the dynamic range SEI message can be sent, for
example, once in a scene or in a rougher unit. Alternatively,
even if the dynamic range SEI message is sent for each picture,
10 a static operation is also possible unless a value of the
metadata information changes.
[0048]
The metadata information indicating the HDR
opto-electronic transfer characteristic and the metadata
15 information for display control may be inserted into the layer
of the container instead of the layer of the video stream or
together with the layer of the video stream. For example,
the system encoder 105 inserts a newly defined video dynamic
range descriptor under a program map table (PMT). This is
20 sufficient if the static operation is sufficient.
[0049]
Alternatively, if it is sufficient to know the metadata
information indicating the HDR opto-electronic transfer
characteristic and the metadata information for display
25 control on a program-by-program basis, it is also conceivable
to insert the video dynamic range descriptor under an event
information table (EIT).
[0050]
Fig. 8 illustrates a structural example (syntax) of the
30 video dynamic range descriptor. An eight-bit field of
"descriptor_tag" represents a descriptor type. Here, this
20
represents that the descriptor is a video dynamic range
descriptor. An eight-bit field of "descriptor_length"
represents a length (size) of the descriptor, and represents
the number of following bytes as the descriptor length. Note
5 that although detailed description is omitted, content of this
video dynamic range descriptor is identical to content of the
above-described dynamic range SEI message.
[0051]
[Configuration of transport stream TS]
10 Fig. 9 illustrates a configuration example of the
transport stream TS. In this configuration example, a PES
packet of the video stream identified by PID1 "video PES1"
exists. The metadata information "Transfer characteristics
1" indicating the SDR opto-electronic transfer characteristic
15 (gamma characteristic) is inserted into the VUI region of SPS
of the access unit. In addition, the dynamic range SEI message
describing the metadata information indicating the HDR
opto-electronic transfer characteristic "Transfer
characteristics 2" and the metadata information for display
20 control "peak level, threshold level" are inserted into the
access unit.
[0052]
In addition, the transport stream TS includes the program
map table (PMT) as program specific information (PSI). The
25 PSI is information that describes to which program each
elementary stream included in the transport stream belongs.
In the PMT, a program loop that describes information related
to the overall program exists.
[0053]
30 In the PMT, an elementary stream loop that has
information related to each elementary stream exists. In this
21
configuration example, a video elementary stream loop
corresponding to the video stream (video ES loop) exists. In
the video elementary stream loop (video ES loop), information
such as a stream type and a packet identifier (PID) is arranged
5 corresponding to the video stream, and a descriptor describing
information related to the video stream is also arranged.
[0054]
A value of "Stream_type" of this video stream is set,
for example, to a value indicating an HEVC video stream, and
10 the PID information indicates PID1 appended to the PES packet
"video PES" of the video stream. As one descriptor, the video
dynamic range descriptor describing the metadata information
indicating the HDR opto-electronic transfer characteristic
"Transfer characteristics 2" and the metadata information for
15 display control "peak level, threshold level" may be inserted.
This descriptor is inserted in place of the dynamic range SEI
message or together with the dynamic range SEI message.
[0055]
In addition, the transport stream TS includes the event
20 information table (EIT) as serviced information (SI) for
performing management on an event-by-event
(program-by-program) basis. The video dynamic range
descriptor describing the metadata information indicating the
HDR opto-electronic transfer characteristic "Transfer
25 characteristics 2" and the metadata information for display
control "peak level, threshold level" may be inserted into
this EIT. This descriptor is inserted in place of the dynamic
range SEI message or together with the dynamic range SEI
message.
30 [0056]
"Configuration example of conventional HDR-incompatible
22
reception apparatus"
Fig. 10 illustrates a configuration example of the
reception apparatus 200. As described above, this reception
apparatus 200 is an HDR-incompatible reception apparatus.
5 This reception apparatus 200 includes a control unit 201, a
reception unit 202, a system decoder 203, a video decoder 204,
an SDR electro-optical conversion unit 206, an SDR display
mapping unit 206, and a CE monitor 207. The control unit 201
includes a central processing unit (CPU), and controls an
10 operation of each unit of the reception apparatus 200 on the
basis of a control program.
[0057]
The reception unit 202 receives the transport stream
TS that is placed on a broadcast wave or a network packet and
15 sent from the transmission apparatus 100. The system decoder
203 extracts the video stream (elementary stream) VS from this
transport stream TS. In addition, the system decoder 203
extracts various pieces of information inserted into the layer
of the container (transport stream), and sends the information
20 to the control unit 201. Note that when the video dynamic
range descriptor is inserted into the layer of the container,
since the reception apparatus 200 is not compatible with HDR,
the descriptor is skipped over.
[0058]
25 The video decoder 204 performs decoding processing on
the video stream VS extracted by the system decoder 203, and
then outputs the transmission video data V1. In addition,
the video decoder 204 extracts a parameter set or an SEI message
inserted into each access unit constituting the video stream
30 VS, and then sends the parameter set or the SEI message to
the control unit 201. Note that when the dynamic range SEI
23
message is inserted into the layer of the video stream, since
the reception apparatus 200 is not compatible with HDR, the
SEI message is skipped over.
[0059]
5 The control unit 201 recognizes the SDR opto-electronic
transfer characteristic (gamma characteristic) on the basis
of the metadata information indicating the SDR opto-electronic
transfer characteristic "Transfer characteristics 1" in the
video usability information (VUI) of the SPS, and sets the
10 SDR electro-optical transfer characteristic with a
characteristic opposite to the SDR opto-electronic transfer
characteristic in the SDR electro-optical conversion unit 205.
The SDR electro-optical conversion unit 205 applies the SDR
electro-optical transfer characteristic to the transmission
15 video data V1 that is output from the video decoder 204, and
obtains display video data for displaying an SDR image.
[0060]
A dashed line b of Fig. 12 is an SDR EOTF curve indicating
the SDR electro-optical transfer characteristic. In this
20 diagram, a horizontal axis represents the transmission code
value and corresponds to the vertical axis of aforementioned
Fig. 3. In addition, in this diagram, a vertical axis
represents a display brightness level (output brightness
level), and corresponds to the horizontal axis of
25 aforementioned Fig. 3. In the SDR electro-optical transfer
characteristic, when the transmission code value is the peak
level MP, the display brightness level is SL. This SL is the
SDR characteristic representation limit brightness as
described above, and is 100 cd/m2.
30 [0061]
The SDR display mapping unit 206 performs display
24
brightness adjustment on the display video data obtained by
the SDR electro-optical conversion unit 205. That is, when
maximum brightness display capability of the CE monitor 207
is DP, which is higher than SL, the SDR display mapping unit
5 206 performs display mapping processing, that is, brightness
conversion processing so as to cause the display maximum
brightness level to be DP. An alternate long and short dash
line b' of Fig. 12 indicates one example of the brightness
conversion processing in this case.
10 [0062]
An operation of the reception apparatus 200 illustrated
in Fig. 10 will be described briefly. The reception unit 202
receives the transport stream TS that is placed on a broadcast
wave or a network packet and sent from the transmission
15 apparatus 100. This transport stream TS is supplied to the
system decoder 203. The system decoder 203 extracts the video
stream VS from this transport stream TS.
[0063]
In addition, the system decoder 203 extracts various
20 pieces of information inserted into the layer of the container
and sends the information to the control unit 201. Note that
when the video dynamic range descriptor is inserted into the
layer of the container, since the reception apparatus 200 is
not compatible with HDR, the descriptor is skipped over.
25 [0064]
The video stream VS extracted by the system decoder 203
is supplied to the video decoder 204. The video decoder 204
performs decoding processing on the video stream VS extracted
by the system decoder 203 to obtain the transmission video
30 data V1.
[0065]
25
In addition, the video decoder 204 extracts the parameter
set or the SEI message inserted into each access unit
constituting the video stream VS, and then sends the parameter
set or the SEI message to the control unit 201. Note that
5 when the dynamic range SEI message is inserted into the layer
of the video stream, since the reception apparatus 200 is not
compatible with HDR, the SEI message is skipped over.
[0066]
The control unit 201 recognizes the SDR opto-electronic
10 transfer characteristic (gamma characteristic) on the basis
of the metadata information indicating the SDR opto-electronic
transfer characteristic "Transfer characteristics 1" in the
video usability information (VUI) of the SPS, and sets the
SDR electro-optical transfer characteristic with a
15 characteristic opposite to the SDR opto-electronic transfer
characteristic in the SDR electro-optical conversion unit 205.
[0067]
The transmission video data V1 obtained by the video
decoder 203 is supplied to the SDR electro-optical conversion
20 unit 205. The SDR electro-optical conversion unit 205 applies
the SDR electro-optical transfer characteristic to the
transmission video data V1 that is output from the video decoder
204, and obtains display video data for displaying an SDR image.
[0068]
25 The display video data obtained by the SDR
electro-optical conversion unit 205 is supplied to the SDR
display mapping unit 206. The SDR display mapping unit 206
performs display brightness adjustment on the display video
data. That is, when the maximum brightness display capability
30 of the CE monitor 207 is DP, which is higher than SL, the SDR
display mapping unit 206 performs display mapping processing,
26
that is, brightness conversion processing so as to cause the
display maximum brightness level to be DP (refer to the
alternate long and short dash line b' of Fig. 12).
[0069]
5 Output video data of the display mapping unit 206 is
supplied to the CE monitor 207. This CE monitor 207 displays
the SDR image that undergoes the display brightness adjustment.
[0070]
"Configuration example of HDR-compatible reception
10 apparatus"
Fig. 11 illustrates a configuration example of the
reception apparatus 300. As described above, this reception
apparatus 300 is an HDR-compatible reception apparatus. This
reception apparatus 300 includes a control unit 301, a
15 reception unit 302, a system decoder 303, a video decoder 304,
an HDR electro-optical conversion unit 305, an HDR display
mapping unit 306, and a CE monitor 307. The control unit 301
includes a central processing unit (CPU), and controls an
operation of each unit of the reception apparatus 300 on the
20 basis of a control program.
[0071]
The reception unit 302 receives the transport stream
TS that is placed on a broadcast wave or a network packet and
sent from the transmission apparatus 100. The system decoder
25 303 extracts the video stream (elementary stream) VS from this
transport stream TS. In addition, the system decoder 303
extracts various pieces of information inserted into the layer
of the container (transport stream), and sends the information
to the control unit 301. When the video dynamic range
30 descriptor is inserted into the layer of the container, since
the reception apparatus 300 is compatible with HDR, the
27
extracted information also includes information on the
descriptor.
[0072]
The video decoder 304 performs decoding processing on
5 the video stream VS extracted by the system decoder 303, and
then outputs the transmission video data V1. In addition,
the video decoder 304 extracts the parameter set or the SEI
message inserted into each access unit constituting the video
stream VS, and then sends the parameter set or the SEI message
10 to the control unit 301. Note that when the dynamic range
SEI message is inserted into the layer of the video stream,
since the reception apparatus 300 is compatible with HDR, the
SEI message is also extracted.
[0073]
15 The control unit 301 recognizes the HDR opto-electronic
transfer characteristic (new gamma characteristic) on the
basis of the metadata information indicating the HDR
opto-electronic transfer characteristic "Transfer
characteristics 2" in the dynamic range SEI message or video
20 dynamic range descriptor, and sets the HDR electro-optical
transfer characteristic with a characteristic opposite to the
HDR opto-electronic transfer characteristic in the HDR
electro-optical conversion unit 305. The HDR electro-optical
conversion unit 305 applies the HDR electro-optical transfer
25 characteristic to the transmission video data V1 that is output
from the video decoder 304, and obtains display video data
for displaying an HDR image.
[0074]
A solid line a of Fig. 12 is an HDR EOTF curve indicating
30 the HDR electro-optical transfer characteristic. In the HDR
electro-optical transfer characteristic, when the
28
transmission code value is the peak level MP, the display
brightness level is PL. In addition, when the transmission
code value is the threshold level CP, the output brightness
level is the HDR display reference threshold CL. As described
5 above, this threshold CL indicates the boundary between the
region in which matching is performed as brightness to be
displayed on the monitor (CE monitor) on a receiver side and
the CE monitor dependent region.
[0075]
10 Brightness information of PL and CL is included as the
metadata information for display control in the dynamic range
SEI message inserted into the layer of the video stream and
the video dynamic range descriptor inserted in the layer of
the container (refer to Fig. 6 to Fig. 8).
15 [0076]
The HDR display mapping unit 306 performs display
brightness adjustment on the display video data obtained by
the HDR electro-optical conversion unit 305 on the basis of
the metadata information for display control. That is, when
20 the maximum brightness display capability of the CE monitor
307 is EP, which is higher than PL, the HDR display mapping
unit 306 can also perform display mapping processing, that
is, perform brightness conversion processing on the level
exceeding the brightness CL out of the output brightness level
25 of the HDR electro-optical conversion unit 305 so as to cause
the display maximum brightness level to be EP, as one method
of display functions. A two-dot chain line a' of Fig. 12
indicates one example of the brightness conversion processing
in this case.
30 [0077]
An operation of the reception apparatus 300 illustrated
29
in Fig. 11 will be described briefly. The reception unit 302
receives the transport stream TS that is placed on a broadcast
wave or a network packet and sent from the transmission
apparatus 100. This transport stream TS is supplied to the
5 system decoder 303. The system decoder 303 extracts the video
stream VS from this transport stream TS.
[0078]
In addition, the system decoder 303 extracts various
pieces of information inserted into the layer of the container
10 and sends the information to the control unit 301. Note that
when the video dynamic range descriptor is inserted into the
layer of the container, since the reception apparatus 300 is
compatible with HDR, the extracted information also includes
the information on the descriptor.
15 [0079]
The video stream VS extracted by the system decoder 303
is supplied to the video decoder 304. The video decoder 304
performs decoding processing on the video stream VS extracted
by the system decoder 303 to obtain the transmission video
20 data V1.
[0080]
In addition, the video decoder 304 extracts the parameter
set or SEI message inserted into each access unit constituting
the video stream VS, and sends the parameter set or SEI message
25 to the control unit 301. Note that when the dynamic range
SEI message is inserted into the layer of the video stream,
since the reception apparatus 300 is compatible with HDR, the
SEI message is also extracted.
[0081]
30 The control unit 301 recognizes the HDR opto-electronic
transfer characteristic (new gamma characteristic) on the
30
basis of the metadata information indicating the HDR
opto-electronic transfer characteristic "Transfer
characteristics 2" in the dynamic range SEI message or video
dynamic range descriptor, and sets the HDR electro-optical
5 transfer characteristic with a characteristic opposite to the
HDR opto-electronic transfer characteristic in the HDR
electro-optical conversion unit 305. The HDR electro-optical
conversion unit 305 applies the HDR electro-optical transfer
characteristic to the transmission video data V1 that is output
10 from the video decoder 304, and then obtains display video
data for displaying an HDR image.
[0082]
The display video data obtained by the HDR
electro-optical conversion unit 305 is supplied to the HDR
15 display mapping unit 306. The HDR display mapping unit 306
performs display brightness adjustment on the display video
data on the basis of the metadata information for display
control. That is, when the maximum brightness display
capability of the CE monitor 307 is EP, which is higher than
20 PL, the HDR display mapping unit 306 performs display mapping
processing, that is, perform brightness conversion processing
on the level exceeding the brightness CL out of the output
brightness level of the HDR electro-optical conversion unit
305 so as to cause the display maximum brightness level to
25 be EP (refer to the two-dot chain line a' of Fig. 12).
[0083]
Output video data of the display mapping unit 306 is
supplied to the CE monitor 307. This CE monitor 307 displays
the HDR image that undergoes display brightness adjustment.
30 [0084]
As described above, in the transmission and reception
31
system 10 illustrated in Fig. 1, the metadata information
indicating the SDR opto-electronic transfer characteristic
(gamma characteristic) is inserted into the layer of the video
stream, and the metadata information indicating the HDR
5 opto-electronic transfer characteristic (new gamma
characteristic) is inserted into at least one of the layer
of the video stream and the layer of the container. Therefore,
both the conventional receiver and the HDR-compatible receiver
can well perform electro-optical conversion processing on the
10 transmission video data V1 obtained by using the HDR
opto-electronic transfer characteristic.
[0085]
That is, the conventional receiver (reception apparatus
200) can determine that the opto-electronic transfer
15 characteristic is similar to conventional one on the basis
of the metadata information indicating the SDR opto-electronic
transfer characteristic. In addition, the HDR-compatible
receiver (reception apparatus 300) can determine that the
opto-electronic transfer characteristic is the HDR
20 opto-electronic transfer characteristic on the basis of the
metadata information indicating the HDR opto-electronic
transfer characteristic. Therefore, both the conventional
receiver and the HDR-compatible receiver can well perform
electro-optical conversion processing on the transmission
25 video data V1 obtained by using the HDR opto-electronic
transfer characteristic.
[0086]
In addition, in the transmission and reception system
10 illustrated in Fig. 1, the metadata information for display
30 control is inserted together with the metadata information
indicating the HDR opto-electronic transfer characteristic.
32
Therefore, the HDR-compatible receiver can properly perform
the display brightness control by using this metadata
information for display control. In this case, the metadata
information for display control includes region information
5 indicating a region in which brightness conversion is permitted,
and for example, the brightness conversion according to the
display brightness capability of the CE monitor 307 is
performed only in the region in which the brightness conversion
is permitted, which makes it possible to well reproduce
10 brightness atmosphere intended by a production side.
[0087]
<2. Variations>
Note that the above-described embodiment has described
an example in which, in the reception apparatuses 200, 300,
15 the electro-optical conversion units 205, 305 perform the
electro-optical conversion processing and the display mapping
units 206, 306 perform the brightness conversion processing
according to the maximum brightness display capability of the
CE monitors 207, 307. However, it is possible to cause only
20 the electro-optical conversion units 205, 305 to perform the
electro-optical conversion processing and the brightness
conversion processing simultaneously by reflecting the
brightness transfer characteristic on the electro-optical
transfer characteristic (EOTF).
25 [0088]
In addition, the above-described embodiment has
described the transmission and reception system 10 including
the transmission apparatus 100 and the reception apparatuses
200, 300; however, the configuration of the transmission and
30 reception system to which the present technology is applicable
is not limited to this configuration. For example, as in the
33
transmission and reception system 10A illustrated in Fig. 13,
a section of the reception apparatuses 200, 300 may include,
for example, set top boxes (STBs) 200A, 300A and monitors 200B,
300B connected by a digital interface such as (high-definition
5 multimedia interface (HDMI). Note that "HDMI" is a registered
trademark.
[0089]
In this case, the video decoders 204, 304 and upstream
sections are included in the set top boxes 200A, 300A, whereas
10 the electro-optical conversion units 205, 305 and downstream
sections are included in the monitors 200B, 300B. The
HDR-incompatible set top box 200A sends the metadata
information indicating the SDR opto-electronic transfer
characteristic (gamma characteristic) to the monitor 200B,
15 for example, by using a packet of "Vender Specific Info Frame."
In addition, the HDR-compatible set top box 300A sends the
metadata information indicating the HDR opto-electronic
transfer characteristic (gamma characteristic) and the
metadata information for display control to the monitor 300B,
20 for example, by using the packet of "Vender Specific Info
Frame."
[0090]
Fig. 14 illustrates a structural example of seventh and
subsequent bytes of the packet of "Vender Specific InfoFrame"
25 to be sent from the set top box 200A to the monitor 200B. In
addition, Fig. 15 illustrates a structural example of seventh
and subsequent bytes of the packet of "Vender Specific
InfoFrame" to be sent from the set top box 300A to the monitor
300B. In addition, Fig. 16 illustrates content of major
30 information in each structural example.
[0091]
34
First, the structural example of Fig. 14 will be
described. In the seventh bit to the fifth bit of the seventh
byte, three-bit information of "Display_control_type" is
arranged. This three-bit information represents a kind of
5 display type. A numerical value "001" represents SD display
control, whereas a numerical value "010" represents HDR display
control. Here, "001" is set.
[0092]
In the fourth bit to the 0th bit of the seventh byte,
10 five-bit information of "Display_control_metadata_length" is
arranged. This five-bit information represents a size of
"Display_control_metadata" to be subsequently arranged in the
number of bytes. Here, "2" is set.
[0093]
15 In the eighth byte, eight-bit information of "Transfer
characteristics" is arranged. This eight-bit information
represents the opto-electronic transfer characteristic.
With this information, the electro-optical transfer
characteristic for display is detected. "0x01" represents
20 the SDR opto-electronic transfer characteristic (gamma
characteristic), whereas "0x10" represents the HDR
opto-electronic transfer characteristic (new gamma
characteristic). Here, "0x01" is set. In the (8 + 1)th byte,
eight-bit information of "Number of bits" is arranged. This
25 eight-bit information represents the number of bits of encoded
pixel.
[0094]
Next, the configuration example of Fig. 15 will be
described. In the seventh bit to the fifth bit of the seventh
30 byte, three-bit information of "Display_control_type" is
arranged. This three-bit information represents a kind of
35
display type. A numerical value "001" represents SD display
control, whereas a numerical value "010" represents HDR display
control. Here, "010" is set.
[0095]
5 In the fourth bit to the 0th bit of the seventh byte,
five-bit information of "Display_control_metadata_length" is
arranged. This five-bit information represents a size of
"Display_control_metadata" to be subsequently arranged in the
number of bytes. Here, "12" is set.
10 [0096]
In the eighth byte, eight-bit information of "Transfer
characteristics" is arranged. This eight-bit information
represents the opto-electronic transfer characteristic.
With this information, the electro-optical transfer
15 characteristic for display is detected. "0x01" represents
the SDR opto-electronic transfer characteristic (gamma
characteristic), whereas "0x10" represents the HDR
opto-electronic transfer characteristic (new gamma
characteristic). Here, "0x10" is set. In the (8 + 1)th byte,
20 eight-bit information of "Number of bits" is arranged. This
eight-bit information represents the number of bits of encoded
pixel.
[0097]
In the (8 + 2)th byte to the (8 + 3)th byte, 16-bit
25 information of "Minimum brightness value" is arranged. This
16-bit information represents minimum level brightness
(cd/m2). In the (8 + 4)th byte to the (8 + 5)th byte, 16-bit
information of "Peak Level" is arranged. This 16-bit
information represents a maximum level relative value (%).
30 [0098]
In the (8 + 6)th byte to the (8 + 7)th byte, 16-bit
36
information of "Peak Level Brightness" is arranged. This
16-bit information represents maximum level brightness
(cd/m2). In the (8 + 8)th byte to the (8 + 9)th byte, 16-bit
information of "Compliant_threshold_level" is arranged.
5 This 16-bit information represents a threshold (%) at a time
of display level mapping. In the (8 + 10)th byte to the (8
+ 11)th byte, 16-bit information of
"Compliant_threshold_level_value" is arranged. This 16-bit
information represents brightness (cd/m2) which is a threshold
10 at a time of display level mapping.
[0099]
In addition, the above-described embodiment has
described an example in which the container is a transport
stream (MPEG-2 TS). However, in the present technology, the
15 transport is not limited to TS, and even for other packets,
for example, ISOBMFF and MMT, video layers can be implemented
by the same method. Therefore, the present technology is also
similarly applicable to a system with a configuration of
distribution to a reception terminal using a network such as
20 the Internet. In the distribution over the Internet,
distribution is often carried out on a container of MP4 or
other formats. That is, as the container, containers of
various formats are applicable, such as the transport stream
employed in the digital broadcasting standard (MPEG-2 TS) and
25 MP4 used for Internet distribution.
[0100]
In addition, the present technology can also have the
following configurations.
(1) A transmission apparatus including:
30 an opto-electronic conversion unit configured to
perform high dynamic range opto-electronic conversion on high
37
dynamic range video data to obtain transmission video data;
an encoding unit configured to perform encoding
processing on the transmission video data to obtain video
stream;
5 a transmission unit configured to transmit a container
of a predetermined format including the video stream; and
an information insertion unit configured to insert
metadata information indicating a standard dynamic range
opto-electronic transfer characteristic into a layer of the
10 video stream, and to insert metadata information indicating
the high dynamic range opto-electronic transfer
characteristic into at least one of the layer of the video
stream and a layer of the container.
(2) The transmission apparatus according to (1), wherein
15 the information insertion unit inserts metadata information
for display control together with the metadata information
indicating the high dynamic range opto-electronic transfer
characteristic.
(3) The transmission apparatus according to (2), wherein
20 the metadata information for display control includes peak
brightness information.
(4) The transmission apparatus according to (2) or (3),
wherein the metadata information for display control includes
region information indicating a region in which brightness
25 conversion is permitted.
(5) The transmission apparatus according to any of (1) to
(4), wherein when inserting the metadata information
indicating the high dynamic range opto-electronic transfer
characteristic into the layer of the video stream, the
30 information insertion unit inserts the metadata information
indicating the standard dynamic range opto-electronic
38
transfer characteristic into a first region in the video stream,
and inserts the metadata information indicating the high
dynamic range opto-electronic transfer characteristic into
a second region different from the first region in the video
5 stream.
(6) The transmission apparatus according to (5), wherein
the first region is a region of an SPS NAL unit, and the second
region is a region of an SEI NAL unit.
(7) The transmission apparatus according to any of (1) to
10 (6), wherein
the container is a transport stream, and
when inserting the metadata information indicating the
high dynamic range opto-electronic transfer characteristic
into the layer of the container, the information insertion
15 unit inserts the metadata information under a program map
table.
(8) The transmission apparatus according to any of (1) to
(6), wherein
the container is a transport stream, and
20 when inserting the metadata information indicating the
high dynamic range opto-electronic transfer characteristic
into the layer of the container, the information insertion
unit inserts the metadata information under an event
information table.
25 (9) A transmission method including:
an opto-electronic conversion step of performing high
dynamic range opto-electronic conversion on high dynamic range
video data to obtain transmission video data;
an encoding step of performing encoding processing on
30 the transmission video data to obtain a video stream;
a transmission step of transmitting, by a transmission
39
unit, a container of a predetermined format including the video
stream; and
an information insertion step of inserting metadata
information indicating a standard dynamic range
5 opto-electronic transfer characteristic into a layer of the
video stream, and of inserting metadata information indicating
the high dynamic range opto-electronic transfer
characteristic into at least one of the layer of the video
stream and a layer of the container.
10 (10) A reception apparatus including:
a reception unit configured to receive a container
including a video stream obtained through encoding of
transmission video data;
a decoding unit configured to perform decoding
15 processing on the video stream to obtain the transmission video
data; and
an electro-optical conversion unit configured to
perform electro-optical conversion on the transmission video
data to obtain video data for display,
20 wherein when metadata information indicating a standard
dynamic range opto-electronic transfer characteristic is
inserted into a layer of the video stream and metadata
information indicating the high dynamic range opto-electronic
transfer characteristic is inserted into at least one of the
25 layer of the video stream and a layer of the container, on
the basis of the metadata information indicating the high
dynamic range opto-electronic transfer characteristic, the
electro-optical conversion unit performs high dynamic range
electro-optical conversion with a characteristic opposite to
30 the high dynamic range opto-electronic transfer
characteristic on the transmission video data to obtain the
40
video data for display.
(11) The reception apparatus according to (10), further
including a brightness adjustment unit configured to perform
display brightness adjustment on the video data for display,
5 wherein when metadata information for display control
is inserted together with the metadata information indicating
the high dynamic range opto-electronic transfer
characteristic, the brightness adjustment unit performs the
display brightness adjustment on the video data for display
10 on the basis of the metadata information for display control.
(12) The reception apparatus according to (11), wherein
the metadata information for display control includes
region information indicating a region in which brightness
conversion is permitted, and
15 the brightness adjustment unit performs the display
brightness adjustment in the region in which the brightness
conversion is permitted.
(13) A reception method including:
a reception step of receiving, by a reception unit, a
20 container including a video stream obtained through encoding
of transmission video data;
a decoding step of performing decoding processing on
the video stream to obtain the transmission video data; and
an electro-optical conversion step of performing
25 electro-optical conversion on the transmission video data to
obtain video data for display,
wherein when metadata information indicating a standard
dynamic range opto-electronic transfer characteristic is
inserted into a layer of the video stream and metadata
30 information indicating the high dynamic range opto-electronic
transfer characteristic is inserted into at least one of the
41
layer of the video stream and a layer of the container, on
the basis of the metadata information indicating the high
dynamic range opto-electronic transfer characteristic, the
electro-optical conversion step includes performing high
5 dynamic range electro-optical conversion with a
characteristic opposite to the high dynamic range
opto-electronic transfer characteristic on the transmission
video data to obtain the video data for display.
[0101]
10 Major features of the present technology is that both
of the conventional receiver and the HDR-compatible receiver
can well perform the electro-optical conversion processing
on the transmission video data obtained by using the HDR
opto-electronic transfer characteristic, by inserting the
15 metadata information indicating the SDR opto-electronic
transfer characteristic (gamma characteristic) into the layer
of the video stream, and by inserting the metadata information
indicating the HDR opto-electronic transfer characteristic
(new gamma characteristic) into at least one of the layer of
20 the video stream and the layer of the container (refer to Fig.
9).
REFERENCE SIGNS LIST
[0102]
25 10, 10A Transmission and reception system
100 Transmission apparatus
101 Control unit
102 HDR camera
103 HDR opto-electronic conversion unit
30 103a Master monitor
104 Video encoder
42
105 System encoder
106 Transmission unit
200, 300 Reception apparatus
200A, 300A Set top box
5 200B, 300B Monitor
201, 301 Control unit
202, 302 Reception unit
203, 303 System decoder
204, 304 Video decoder
10 205 SDR electro-optical conversion unit
206 SDR display mapping unit
207, 307 CE monitor
305 HDR electro-optical conversion unit
306 HDR display mapping unit
15
43
CLAIMS
1. A transmission apparatus comprising:
an opto-electronic conversion unit configured to
5 perform high dynamic range opto-electronic conversion on high
dynamic range video data to obtain transmission video data;
an encoding unit configured to perform encoding
processing on the transmission video data to obtain video
stream;
10 a transmission unit configured to transmit a container
of a predetermined format including the video stream; and
an information insertion unit configured to insert
metadata information indicating a standard dynamic range
opto-electronic transfer characteristic into a layer of the
15 video stream, and to insert metadata information indicating
the high dynamic range opto-electronic transfer
characteristic into at least one of the layer of the video
stream and a layer of the container.
20 2. The transmission apparatus according to claim 1, wherein
the information insertion unit inserts metadata information
for display control together with the metadata information
indicating the high dynamic range opto-electronic transfer
characteristic.
25
3. The transmission apparatus according to claim 2, wherein
the metadata information for display control includes peak
brightness information.
30 4. The transmission apparatus according to claim 2, wherein
the metadata information for display control includes region
44
information indicating a region in which brightness conversion
is permitted.
5. The transmission apparatus according to claim 1, wherein
5 when inserting the metadata information indicating the high
dynamic range opto-electronic transfer characteristic into
the layer of the video stream, the information insertion unit
inserts the metadata information indicating the standard
dynamic range opto-electronic transfer characteristic into
10 a first region in the video stream, and inserts the metadata
information indicating the high dynamic range opto-electronic
transfer characteristic into a second region different from
the first region in the video stream.
15 6. The transmission apparatus according to claim 5, wherein
the first region is a region of an SPS NAL unit, and the second
region is a region of an SEI NAL unit.
7. The transmission apparatus according to claim 1, wherein
20 the container is a transport stream, and
when inserting the metadata information indicating the
high dynamic range opto-electronic transfer characteristic
into the layer of the container, the information insertion
unit inserts the metadata information under a program map
25 table.
8. The transmission apparatus according to claim 1, wherein
the container is a transport stream, and
when inserting the metadata information indicating the
30 high dynamic range opto-electronic transfer characteristic
into the layer of the container, the information insertion
45
unit inserts the metadata information under an event
information table.
9. A transmission method comprising:
5 an opto-electronic conversion step of performing high
dynamic range opto-electronic conversion on high dynamic range
video data to obtain transmission video data;
an encoding step of performing encoding processing on
the transmission video data to obtain a video stream;
10 a transmission step of transmitting, by a transmission
unit, a container of a predetermined format including the video
stream; and
an information insertion step of inserting metadata
information indicating a standard dynamic range
15 opto-electronic transfer characteristic into a layer of the
video stream, and of inserting metadata information indicating
the high dynamic range opto-electronic transfer
characteristic into at least one of the layer of the video
stream and a layer of the container.
20
10. A reception apparatus comprising:
a reception unit configured to receive a container
including a video stream obtained through encoding of
transmission video data;
25 a decoding unit configured to perform decoding
processing on the video stream to obtain the transmission video
data; and
an electro-optical conversion unit configured to
perform electro-optical conversion on the transmission video
30 data to obtain video data for display,
wherein when metadata information indicating a standard
46
dynamic range opto-electronic transfer characteristic is
inserted into a layer of the video stream and metadata
information indicating the high dynamic range opto-electronic
transfer characteristic is inserted into at least one of the
5 layer of the video stream and a layer of the container, on
the basis of the metadata information indicating the high
dynamic range opto-electronic transfer characteristic, the
electro-optical conversion unit performs high dynamic range
electro-optical conversion with a characteristic opposite to
10 the high dynamic range opto-electronic transfer
characteristic on the transmission video data to obtain the
video data for display.
11. The reception apparatus according to claim 10, further
15 comprising a brightness adjustment unit configured to perform
display brightness adjustment on the video data for display,
wherein when metadata information for display control
is inserted together with the metadata information indicating
the high dynamic range opto-electronic transfer
20 characteristic, the brightness adjustment unit performs the
display brightness adjustment on the video data for display
on the basis of the metadata information for display control.
12. The reception apparatus according to claim 11, wherein
25 the metadata information for display control includes
region information indicating a region in which brightness
conversion is permitted, and
the brightness adjustment unit performs the display
brightness adjustment in the region in which the brightness
30 conversion is permitted.
47
13. A reception method comprising:
a reception step of receiving, by a reception unit, a
container including a video stream obtained through encoding
of transmission video data;
5 a decoding step of performing decoding processing on
the video stream to obtain the transmission video data; and
an electro-optical conversion step of performing
electro-optical conversion on the transmission video data to
obtain video data for display,
10 wherein when metadata information indicating a standard
dynamic range opto-electronic transfer characteristic is
inserted into a layer of the video stream and metadata
information indicating the high dynamic range opto-electronic
transfer characteristic is inserted into at least one of the
15 layer of the video stream and a layer of the container, on
the basis of the metadata information indicating the high
dynamic range opto-electronic transfer characteristic, the
electro-optical conversion step comprises performing high
dynamic range electro-optical conversion with a
20 characteristic opposite to the high dynamic range
opto-electronic transfer characteristic on the transmission
video data to obtain the video data for display.