The present invention relates to a Li-Fi based wireless stereo sound transmission and receiver in headset system. The invention more particularly relates to a Li-Fi based Wireless stereo sound system for audio transmission
5 using Li-Fi transmitter and receiver in headset using a single light source have been implemented.
BACKGROUND OF THE INVENTION
[002] As the demand for wireless data communication is increasing rapidly,
new technologies are arriving which use different frequencies in
10 electromagnetic spectrum as the carrier for transmitting data wirelessly. Wi-Fi
is one such method which uses radio waves to communicate wirelessly within
an area. As radio waves have some drawbacks, it is replaced by visible light
and hence the emerged technology is called Li–Fi technology. Li–Fi
technology uses visible light frequency, which is comparatively higher than
15 that of radio wave frequency. Any source of light such as an electric lamp or
LED is used as a source of VLC to transmit information. The light source such
as an LED or a LASER, which is used as the source for audio data
transmission has high brightness, low cost, low power consumption, long
lifetime and low heat radiation and hence it is used as a substitute for
20 established radio waves.
[003] Li–Fi is an emerging technology, as the radio wave communication has
certain drawbacks. This technology can transmit data with the higher
throughput than the radio waves. Li–Fi is categorized as reliable
communication technique as it provides high data security transmission with
3
low cost. In the proposed work, Li-Fi module for transmitting and receiving the
audio is built and tested successfully. It is possible to achieve audio data
transmission by using Li-Fi coupled multiplexers and demultiplexers. Further,
the audio transmission by using relevant photo sensor or optical sensor in the
5 receiver side.
[004] Accordingly, there remains a need in the prior art for a technical
convergence to make the system, apparatus, interfaces and method compact,
it is in this context that the present invention provides a Li-Fi based Wireless
stereo sound system and further, offers the safe usage of this system in the
10 sensitive area like hospital especially in the ICU’s or intensive care units. The
existing systems are likely to cause unhealthy effects on the patients’ in
hospitals due to the radio frequency interferences. The proposed system
overcomes the effects by replacing the radio frequency components with Li-Fi
equipment. Therefore, it would be useful and desirable to have a system and
15 interface to meet the above-mentioned needs.
SUMMARY OF THE PRESENT INVENTION
[005] In view of the foregoing disadvantages inherent in the known types of
system and devices to provide stereo audio streaming using wire or Wi-Fi, are
now present in the prior art, the present invention provides a Li-Fi based
20 Wireless stereo sound system. The system is designed with, but not limited
to, two housings, in which the first compact housing having the main stereo
sound input is communicatively coupled with the second compact housing
having the speaker system for output audio / sound signal by using a Li-Fi
4
transmission module and a Li-Fi receiving module, which has all the
advantages of the prior art and none of the disadvantages.
[006] One of the important aspect of the present invention, in which the both
housings is Li-Fi linked between the transmission module of the Li-Fi wireless
5 stereo system unit and the receiving module of the Li-Fi wireless speaker
system by using the visible light sources.
[007] Another object of the present invention to replace the Wi-Fi or wired
techniques with the Li-Fi one, the present invention is configured with Li-Fi
based protocols, interfaces and hardware units such as, but not limited to, Li10 Fi based level shifter, analog to digital converter and vice-versa, multiplexer,
demultiplexer, light modulation circuitry and other related amplifiers fitted with
a light source that could preferably be, but not limited to, a high intensity
electric lamp for audio streaming.
[008] It is an important aspect of the present invention to provide a Li-Fi based
15 Wireless stereo sound system, which is based on Li-Fi linking, and can be
considered better than Wi-Fi /Radio Wave based systems because there are
some limitations in Wi-Fi, with their radio frequencies, data security and
confidentiality to deliver wireless connectivity.
[009] Another object of the present invention is to provide the light source with
20 a novel hardware interaction by combining and working of the Li-Fi based
hardware in order to serve wireless linking and communication purposes to
offer better solution where a household has many appliances with audio
output, giving good quality audio streaming and also by reducing the
installation cost and environmental hazards for a premise through Li-Fi linking.
5
[010] In this respect, before explaining at least one object of the invention in
detail, it is to be understood that the invention is not limited in its application
to the details of set of rules and to the arrangements of the various models set
forth in the following description or illustrated in the drawings. The invention is
5 capable of other objects and of being practiced and carried out in various
ways, according to the need of that industry. Also, it is to be understood that
the phraseology and terminology employed herein are for the purpose of
description and should not be regarded as limiting.
[011] These together with other objects of the invention, along with the various
10 features of novelty which characterize the invention, are pointed out with
particularity in the disclosure. For a better understanding of the invention, its
operating advantages and the specific objects attained by its uses, reference
should be made to the accompanying drawings and descriptive matter in
which there are illustrated preferred embodiments of the invention.
15 BRIEF DESCRIPTION OF THE DRAWINGS
[012] The invention will be better understood and objects other than those set
forth above will become apparent when consideration is given to the following
detailed description thereof. Such description makes reference to the annexed
drawings wherein:
20 [013] FIG. 1 illustrates a block diagram for a Li-Fi based wireless stereo sound
system, in accordance with an embodiment of the present invention; and
[014] FIG. 2 illustrates various hardware used at transmitting and receiving
terminals, in accordance with another embodiment of the present invention.
6
DETAILED DESCRIPTION OF THE INVENTION
[015] While the present invention is described herein by way of example using
5 embodiments and illustrative drawings, those skilled in the art will recognize
that the invention is not limited to the embodiments of drawing or drawings
described and are not intended to represent the scale of the various
components. Further, some components that may form a part of the invention
may not be illustrated in certain figures, for ease of illustration, and such
10 omissions do not limit the embodiments outlined in any way. It should be
understood that the drawings and detailed description thereto are not intended
to limit the invention to the particular form disclosed, but on the contrary, the
invention is to cover all modifications, equivalents, and alternatives falling
within the scope of the present invention as defined by the appended claims.
15 As used throughout this description, the word "may" is used in a permissive
sense (i.e. meaning having the potential to), rather than the mandatory sense,
(i.e. meaning must). Further, the words "a" or "an" mean "at least one” and the
word “plurality” means “one or more” unless otherwise mentioned.
Furthermore, the terminology and phraseology used herein is solely used for
20 descriptive purposes and should not be construed as limiting in scope.
Language such as "including," "comprising," "having," "containing," or
"involving," and variations thereof, is intended to be broad and encompass the
subject matter listed thereafter, equivalents, and additional subject matter not
recited, and is not intended to exclude other additives, components, integers
7
or steps. Likewise, the term "comprising" is considered synonymous with the
terms "including" or "containing" for applicable legal purposes. Any discussion
of documents, acts, materials, devices, articles and the like is included in the
specification solely for the purpose of providing a context for the present
5 invention. It is not suggested or represented that any or all of these matters
form part of the prior art base or were common general knowledge in the field
relevant to the present invention.
[016] In this disclosure, whenever a composition or an element or a group of
elements is preceded with the transitional phrase “comprising”, it is
10 understood that we also contemplate the same composition, element or group
of elements with transitional phrases “consisting of”, “consisting”, “selected
from the group of consisting of, “including”, or “is” preceding the recitation of
the composition, element or group of elements and vice versa.
[017] The present invention is described hereinafter by various embodiments
15 with reference to the accompanying drawings, wherein reference numerals
used in the accompanying drawing correspond to the like elements throughout
the description. This invention may, however, be embodied in many different
forms and should not be construed as limited to the embodiment set forth
herein. Rather, the embodiment is provided so that this disclosure will be
20 thorough and complete and will fully convey the scope of the invention to those
skilled in the art. In the following detailed description, numeric values and
ranges are provided for various aspects of the implementations described.
These values and ranges are to be treated as examples only and are not
intended to limit the scope of the claims. In addition, a number of materials are
8
identified as suitable for various facets of the implementations. These
materials are to be treated as exemplary and are not intended to limit the
scope of the invention.
[018] Referring now to the drawings, these are illustrated in FIGS. 1 & 2, the
5 present invention discloses a light fidelity (Li-Fi) based wireless stereo sound
system. The system is comprised of, but not limited to, a first housing having
a stereo sound input system communicatively coupled with a Li-Fi
transmission unit; a second housing having an output audio speaker or
headset system communicatively coupled with a Li-Fi receiving unit. The Li-Fi
10 transmission unit is configured to receive its input from a multiplexer unit and
further performing audio streaming and transmitting through an electric lamp
or a visible light source. Further, the Li-Fi receiving unit is configured to receive
its input from the Li-Fi transmission unit and further performing audio
streaming and transmitting through a photo sensor or optical sensor to a
15 demultiplexer unit.
[019] The Li-Fi transmission unit is configured to receive incoming stereo
sound input. After level shifting the analog sounds signals are transformed into
digital format, multiplex and are transmitters through Li-Fi transmitter after
parallel to serial data conversion. At the receiving end serial data is converted
20 from light signal to the electrical signal. After serial to parallel format
conversion sounds signals are transformed to digital analog format, amplified
and given to the output audio speaker or headset system.
[020] In accordance with another embodiment of the present invention, a first
compact housing having the Li-Fi stereo sound unit communicatively coupled
9
with a Li-Fi transmission unit Tx is used to place each of the electronic
components such as, but not limited to, the level shifters, ADC, Multiplexers,
the light source and requisite transmission interfaces at transmission end Tx,
and further, the first housing is communicatively coupled with the second
5 compact housing, i.e. the Li-Fi wireless output audio speaker or headset
system communicatively coupled with a Li-Fi receiving unit.
[021] In accordance with another embodiment of the present invention, the
second compact housing is used to place each of electronic components of
the Li-Fi wireless output audio speaker or headset system communicatively
10 coupled with a Li-Fi receiving unit, which is Li-Fi link based, communicatively
coupled with the first compact housing, i.e. the first housing having a stereo
sound system communicatively coupled with a Li-Fi transmission unit.
[022] In accordance with another embodiment of the present invention, the
second compact housing having the Li-Fi receiving unit Rx and further
15 performing audio streaming and transmitting through a photo sensor or optical
sensor to a demultiplexer unit, which is also used to place each electronic
components at receiving module of the Li-Fi wireless output audio speaker or
headset system, which is Li-Fi link based, communicatively coupled with the
second compact housing as already described in above paragraph, by using
20 the requisite designated ports.
[023] In accordance with another embodiment of the present invention, the
transmitting terminals Tx can be further comprised of, but not limited to, a
signal amplification, modulation, light source and light modulation circuitry.
Further, the signal amplification is placed in the Li-Fi wireless transmission
10
unit Tx, and having the light source for transmitting Li-Fi based modulated
audio data streaming to the next unit, which is Li-Fi wireless receiving unit.
[024] In accordance with another embodiment of the present invention, the
stereo sound system includes ports, interfaces and a Li-Fi supporting circuitry
5 enabling the audio streaming through the Li-Fi transmission unit. The
multiplexer unit is configured to receive its input from an analog to digital
converter (ADC) unit. The multiplexer unit is followed by a Parallel to Serial
Conversion and serial data transmission unit.
[025] In accordance with another embodiment of the present invention, the
10 audio streaming signal amplification, modulation, and the light source can
further be a part of the transmitting terminal Tx, which is configured to transmit
the Li-Fi signal. Further, but not limited to, the optical / photo sensor, the
demultiplexer unit, the audio streaming amplification circuitry can be a subunit of the receiving terminal Rx, which is configured to receive, and convert
15 the received Li-Fi signal in the desired form from the transmission module Tx.
[026] In accordance with another embodiment of the present invention, when
the stereo sound system is activated, the light source will start to perform audio
streaming then from the light a stream of photons is emitted, that light is called
as visible light. For the Li-Fi based audio streaming as soon as, lighting starts
20 transmitting the audio signal from the Li-Fi wireless stereo sound system to
the receiving module of the Li-Fi wireless output audio speaker or headset
system. Thus the audio streaming over light that is received at the optical or
photo sensor is passed on to the receiving terminals vis-à-vis a serial to
parallel conversion demultiplexer unit.
11
[027] In accordance with another embodiment of the present invention, the
output audio speaker or headset system includes ports, interfaces and a Li-Fi
supporting circuitry enabling the audio streaming through the Li-Fi receiving
unit. Further, the demultiplexer unit is configured to provide its output to a
5 digital to analog converter (DAC) unit. Demultiplexer receives its input from a
serial data receiving unit that converts serial incoming data to parallel data
format.
[028] In accordance with another embodiment of the present invention, the
output audio speaker or headset system is further connected with at least one
10 amplifier receiving output from the digital to analog converter (DAC) unit.
[029] The above-mentioned light fidelity (Li-Fi) based wireless stereo sound
system, which is more efficient and genuine substitute of RF based wireless
network or conventional wired network. The Li-Fi link based system having LiFi Wireless stereo sound system and a Li-Fi Wireless output audio speaker or
15 headset system, which is an eco-friendly data communication system through
visible light that perform audio streaming and sensor data to the Li-Fi based
receiver. A connection protection mechanism that co-operates with wireless
network and visible light communication to achieve reliability and performance
overcoming the drawbacks from the pre-existing system is invented.
20 [030] It is to be understood that the above description is intended to be
illustrative, and not restrictive. For example, the above-discussed
embodiments may be used in combination with each other. Many other
embodiments will be apparent to those of skill in the art upon reviewing the
above description.
12
[031] The benefits and advantages which may be provided by the present
invention have been described above with regard to specific embodiments.
These benefits and advantages, and any elements or limitations that may
cause them to occur or to become more pronounced are not to be construed
5 as critical, required, or essential features of any or all of the embodiments.
[032] While the present invention has been described with reference to
particular embodiments, it should be understood that the embodiments are
illustrative and that the scope of the invention is not limited to these
embodiments. Many variations, modifications, additions and improvements to
10 the embodiments described above are possible. It is contemplated that these
variations, modifications, additions and improvements fall within the scope of
the invention.

We Claim:
1. A light fidelity (Li-Fi) based wireless stereo sound system, comprising:
a first housing having a stereo sound system communicatively coupled with a
Li-Fi transmission unit;
5 a second housing having an output audio speaker or headset system
communicatively coupled with a Li-Fi receiving unit;
wherein the Li-Fi transmission unit is configured to receive its input from a
multiplexer and a serial data transmission unit and further performing audio
streaming and transmitting through an electric lamp or a visible light source;
10 and
wherein the Li-Fi receiving unit is configured to receive its input from the Li-Fi
transmission unit and further performing audio streaming and transmitting
through a photo sensor or optical sensor to a demultiplexer unit.
2. The system as claimed in claim 1, wherein the stereo sound system includes
15 ports, interfaces and a Li-Fi supporting circuitry enabling the audio streaming
through the Li-Fi transmission unit.
3. The system as claimed in claim 1, wherein the multiplexer unit receives its input
from an analog to digital converter (ADC) unit.
4. The system as claimed in claim 1, wherein the multiplexer unit is followed by a
20 Parallel to Serial Conversion and serial transmission unit.
5. The system as claimed in claim 1, wherein the stereo sound system is
connected with at least one level shifter providing output of the level shifter to
the analog to digital converter (ADC) unit.
14
6. The system as claimed in claim 1, wherein the stereo sound system includes
ports, interfaces and a Li-Fi supporting circuitry enabling the audio streaming
through the Li-Fi transmission unit.
7. The system as claimed in claim 1, wherein the output audio speaker or headset
5 system includes ports, interfaces and a Li-Fi supporting circuitry enabling the
audio streaming through the Li-Fi receiving unit.
8. The system as claimed in claim 1, wherein the demultiplexer unit provides its
output to a digital to analog converter (DAC) unit.
9. The system as claimed in claim 1, wherein the demultiplexer unit receives
10 incoming sound data from a serial data receiver unit that also performs serial
to parallel conversion.
10.The system as claimed in claim 1, wherein the output audio speaker or headset
system is connected with at least one amplifier receiving output from the digital
to analog converter (DAC) unit.