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Codeword Space Reduction For Intra Chroma Mode Signaling For Hevc
Abstract: Intra prediction is used in state-of-the-art video coding standards such as AVC. The intra prediction modes are coded into the bitstream. Luma and chroma components could potentially have different prediction modes. For chroma components there are 7 different modes defined in AVC: vertical horizontal DC diagonal directions and “same as luma”. Statistics show that the “same as luma” mode is frequently used but in AVC this mode is encoded using more bits than other modes during entropy coding therefore the coding efficiency is decreased. Accordingly a modified binarization/codeword assignment for chroma intra mode signaling is able to be utilized for high efficiency video coding (HEVC) the next generation video coding standard.
Notices, Deadlines & Correspondence
Patent Information
Applicants
SONY CORPORATION
Inventors
1. Liu Wei
2. Dong Lina
3. Maani Ehsan
4. Tabatabai Ali
Claims
1. An apparatus for decoding encoded image data comprising: a circuitry configured to: receive a first bit or a second bit in encoded image data; generate intra prediction mode information for chroma component of the image based on the first bit, wherein the intra prediction mode information for chroma specifies intra prediction mode of the chroma component, when the intra prediction mode of the chroma component and an intra prediction mode of the luma component regarding the luma component is VER+8 mode; generate intra prediction mode information for chroma component of the image based on the second bit, when the intra prediction mode of the chroma component is VER+8 mode and the intra prediction mode of the luma component is DC mode, vertical mode or horizontal mode, wherein the first bit is less than the second bit; and decode the encoded image data according to the generated intra prediction mode information for chroma component.
2. The apparatus of claim 1, wherein the circuitry is further configured to: set the intra prediction mode information for chroma component to 4, when the intra prediction mode of the chroma component is same as the intra prediction mode of the luma component regarding the chroma component.
3. The apparatus of claim 1, wherein the circuitry is further configured to: decide the intra prediction mode of the chroma component according to the generated intra prediction mode information for chroma component.
4. The apparatus of claim 1, wherein the intra prediction mode of chroma component is vertical mode, horizontal mode, or DC mode.
5. The apparatus of claim 3, wherein the circuitry is further configured to: decide the intra prediction mode of the chroma component according to the generated intra prediction mode information for chroma component and the intra prediction mode of luma component, when the intra prediction mode is vertical mode, horizontal mode, or DC mode.
6. A method of decoding encoded image data programmed in a controller of a device comprising: receiving a first bit or a second bit in encoded image data; generating intra prediction mode information for chroma component of the image based on the first bit, wherein the intra prediction mode information for chroma specifies intra prediction mode of the chroma component, when the intra prediction mode of the chroma component and an intra prediction mode of the luma component regarding the luma component is VER+8 mode; generating intra prediction mode information for chroma component of the image based on the second bit, when the intra prediction mode of the chroma component is VER+8 mode and the intra prediction mode of the luma component is DC mode, vertical mode or horizontal mode, wherein the first bit is less than the second bit; and decoding the encoded image data according to the generated intra prediction mode information for chroma component.
7. The method of claim 6, further comprising: setting the intra prediction mode information for chroma component to 4, when the intra prediction mode of the chroma component is same as the intra prediction mode of the luma component regarding the chroma component.
8. The method of claim 6, further comprising: deciding the intra prediction mode of the chroma component according to the generated intra prediction mode information for chroma component.
9. The method of claim 6, wherein the intra prediction mode of chroma component is vertical mode, horizontal mode, or DC mode.
10. The method of claim 8, further comprising: deciding the intra prediction mode of the chroma component according to the generated intra prediction mode information for chroma component and the intra prediction mode of luma component, when the intra prediction mode is vertical mode, horizontal mode, or DC mode.
Specification
We Claim:-
1. An apparatus for decoding encoded image data comprising:
a circuitry configured to:
receive a first bit or a second bit in encoded image data;
generate intra prediction mode information for chroma component of the image based on the first bit, wherein the intra prediction mode information for chroma specifies intra prediction mode of the chroma component, when the intra prediction mode of the chroma component and an intra prediction mode of the luma component regarding the luma component is VER+8 mode;
generate intra prediction mode information for chroma component of the image based on the second bit, when the intra prediction mode of the chroma component is VER+8 mode and the intra prediction mode of the luma component is DC mode, vertical mode or horizontal mode, wherein the first bit is less than the second bit; and
decode the encoded image data according to the generated intra prediction mode information for chroma component.
2. The apparatus of claim 1, wherein the circuitry is further configured to:
set the intra prediction mode information for chroma component to 4, when the intra prediction mode of the chroma component is same as the intra prediction mode of the luma component regarding the chroma component.
3. The apparatus of claim 1, wherein the circuitry is further configured to:
decide the intra prediction mode of the chroma component according to the
generated intra prediction mode information for chroma component.
4. The apparatus of claim 1, wherein the intra prediction mode of chroma component is vertical mode, horizontal mode, or DC mode.
5. The apparatus of claim 3, wherein the circuitry is further configured to: decide the intra prediction mode of the chroma component according to the
generated intra prediction mode information for chroma component and the intra prediction mode of luma component, when the intra prediction mode is vertical mode, horizontal mode, or DC mode.
6. A method of decoding encoded image data programmed in a controller of a
device comprising:
receiving a first bit or a second bit in encoded image data;
generating intra prediction mode information for chroma component of the image based on the first bit, wherein the intra prediction mode information for chroma specifies intra prediction mode of the chroma component, when the intra prediction mode of the chroma component and an intra prediction mode of the luma component regarding the luma component is VER+8 mode;
generating intra prediction mode information for chroma component of the image based on the second bit, when the intra prediction mode of the chroma component is VER+8 mode and the intra prediction mode of the luma component is DC mode, vertical mode or horizontal mode, wherein the first bit is less than the second bit; and
decoding the encoded image data according to the generated intra prediction mode information for chroma component.
7. The method of claim 6, further comprising:
setting the intra prediction mode information for chroma component to 4, when the intra prediction mode of the chroma component is same as the intra prediction mode of the luma component regarding the chroma component.
8. The method of claim 6, further comprising:
deciding the intra prediction mode of the chroma component according to the generated intra prediction mode information for chroma component.
9. The method of claim 6, wherein the intra prediction mode of chroma component is vertical mode, horizontal mode, or DC mode.
10. The method of claim 8, further comprising:
deciding the intra prediction mode of the chroma component according to the generated intra prediction mode information for chroma component and the intra prediction mode of luma component, when the intra prediction mode is vertical mode, horizontal mode, or DC mode.
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | Translation-Search Report.pdf | 2011-12-26 |
| 2 | Priority Document.pdf | 2011-12-26 |
| 3 | Power of Authority.pdf | 2011-12-26 |
| 4 | Form-5.pdf | 2011-12-26 |
| 5 | Form-3.pdf | 2011-12-26 |
| 6 | Form-1.pdf | 2011-12-26 |
| 7 | Drawings.pdf | 2011-12-26 |
| 8 | 4457-CHE-2011 CORRESPONDENCE OTHERS 03-02-2012.pdf | 2012-02-03 |
| 9 | 4457-CHE-2011 FORM-18 03-02-2012.pdf | 2012-02-03 |
| 10 | 4457-CHE-2011 POWER OF ATTORNEY 03-02-2012.pdf | 2012-02-03 |
| 11 | 4457-CHE-2011 CORRESPONDENCE OTHERS 06-02-2012.pdf | 2012-02-06 |
| 12 | 4457-CHE-2011 CORRESPONDENCE OTHERS .. 06-02-2012.pdf | 2012-02-06 |
| 13 | 4457-CHE-2011 CORRESPONDENCE OTHERS 13-02-2012.pdf | 2012-02-13 |
| 14 | 4457-CHE-2011 ASSIGNMENT 13-02-2012.pdf | 2012-02-13 |
| 15 | 4457-CHE-2011 FORM-3 15-05-2012.pdf | 2012-05-15 |
| 16 | 4457-CHE-2011 CORRESPONDENCE OTHERS 15-05-2012.pdf | 2012-05-15 |
| 17 | 4457-CHE-2011 CORRESPONDENCE OTHERS 29-05-2012.pdf | 2012-05-29 |
| 18 | 4457-CHE-2011 FORM-13 29-05-2012.pdf | 2012-05-29 |
| 19 | 4457-CHE-2011 FORM-1 29-05-2012.pdf | 2012-05-29 |
| 20 | Form 13 [23-02-2016(online)].pdf | 2016-02-23 |
| 21 | Description(Complete) [23-02-2016(online)].pdf | 2016-02-23 |
| 22 | 4457-CHE-2011-Power of Attorney-250216.pdf | 2016-07-08 |
| 23 | 4457-CHE-2011-Correspondence-PA-250216.pdf | 2016-07-08 |
| 24 | 4457-CHE-2011-FER.pdf | 2017-08-31 |
| 25 | 4457-CHE-2011-FER_SER_REPLY [27-02-2018(online)].pdf | 2018-02-27 |
| 26 | 4457-CHE-2011-DRAWING [27-02-2018(online)].pdf | 2018-02-27 |
| 27 | 4457-CHE-2011-CORRESPONDENCE [27-02-2018(online)].pdf | 2018-02-27 |
| 28 | 4457-CHE-2011-COMPLETE SPECIFICATION [27-02-2018(online)].pdf | 2018-02-27 |
| 29 | 4457-CHE-2011-CLAIMS [27-02-2018(online)].pdf | 2018-02-27 |
| 30 | 4457-CHE-2011-ABSTRACT [27-02-2018(online)].pdf | 2018-02-27 |
| 31 | Correspondence by Agent_Reply to FER_01-03-2018.pdf | 2018-03-01 |
| 32 | 4457-CHE-2011-HearingNoticeLetter-(DateOfHearing-03-04-2020).pdf | 2020-02-19 |
| 33 | 4457-CHE-2011-Correspondence to notify the Controller [16-04-2020(online)].pdf | 2020-04-16 |
| 34 | 4457-CHE-2011-US(14)-ExtendedHearingNotice-(HearingDate-28-02-2022).pdf | 2022-02-18 |
| 35 | 4457-CHE-2011-FORM-26 [21-02-2022(online)].pdf | 2022-02-21 |
| 36 | 4457-CHE-2011-Correspondence to notify the Controller [21-02-2022(online)].pdf | 2022-02-21 |
| 37 | 4457-CHE-2011-US(14)-ExtendedHearingNotice-(HearingDate-02-03-2022).pdf | 2022-03-01 |
| 38 | 4457-CHE-2011-Written submissions and relevant documents [17-03-2022(online)].pdf | 2022-03-17 |
| 39 | 4457-CHE-2011-PatentCertificate06-01-2023.pdf | 2023-01-06 |
| 40 | 4457-CHE-2011-IntimationOfGrant06-01-2023.pdf | 2023-01-06 |
Search Strategy
| 1 | 4457-CHE-2011_25-08-2017.pdf |