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new patent Device and method for transmitting and receiving data using hdmi




Device and method for transmitting and receiving data using hdmi


A method for transmitting and receiving data of a sink device by using HDMI is disclosed. A method for transmitting and receiving data of a sink device by using HDMI according to the present invention comprises receiving at least one of video data or audio data from a source device through HDMI wherein the audio data include multi-stream audio data; transmitting a CEC message requesting multi-stream audio information to the source device; and receiving a response CEC message including multi-stream audio information from the source device.



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USPTO Applicaton #: #20170078739
Inventors: Hyeonjae Lee, Dokyun Kim, Jangwoong Park, Hyunsik Yang


The Patent Description & Claims data below is from USPTO Patent Application 20170078739, Device and method for transmitting and receiving data using hdmi.


TECHNICAL FIELD

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The present invention is related to a device and a method for transmitting and receiving data using HDMI (High Definition Multimedia Interface) and more specifically, a device and a method for transmitting and receiving data using HDMI, controlling a multi-stream audio output through a remote controller of an HDMI sink device in case multi-stream audio-enabled content is played.

BACKGROUND

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ART

HDMI is an interface/standard that develops a Digital Visual Interface (DVI) which is an interface standard of personal computers and displays for a use of AV electronic products. Since the HDMI transmits video/audio from a player to a display device without compressing it, there is very little latency between a source device and a sink device. And the HDMI has high format compatibility since the HDMI does not require separate decoder chip or software. In addition, the HDMI is available to make wirings between AV devices be simplified, which were complicated because video signals, audio signals and control signals are transmitted on only one cable, and the HDMI provides a High-bandwidth Digital Content Protection (HDCP) technique, thereby providing the copyright protection function.

INVENTION CONTENT Technical Problem

HDMI can support multi-stream audio transmission when a source device transmits video/audio data. However, a CEC message/operation for a sink device to control selecting/changing the aforementioned multi-stream audio data by using a remote controller has not been proposed yet. Therefore, although multi-stream audio data can be transmitted from a source device to a sink device through HDMI, there is still an inconvenience/disadvantage that a remote controller of the sink device is incapable of controlling the multi-stream audio data.

Technical Solution

To solve the technical problem above, a method for transmitting and receiving data of a sink device by using HDMI according to the present invention comprises receiving at least one of video data or audio data from a source device through HDMI wherein the audio data include multi-stream audio data; transmitting a CEC message requesting multi-stream audio information to the source device; and receiving a response CEC message including multi-stream audio information from the source device.

Also, in a method for transmitting and receiving data of a sink device by using HDMI according to the present invention, the multi-stream audio information can include at least one of channel information or attribute information of multi-stream audio.

Also, a method for transmitting and receiving data of a sink device by using HDMI according to the present invention can further comprise providing a UI showing the multi-stream audio information; and in case a user input selecting one audio stream from the multi-stream audio, transmitting a CEC message requesting change of a multi-stream audio channel to the source device.

Also, in a method for transmitting and receiving data of a sink device by using HDMI according to the present invention, a CEC message requesting change of the multi-stream audio channel can include channel information of at least one audio among the multi-stream audio, and the multi-stream audio can include four audio channels.

A sink device transmitting and receiving data by using HDMI according to the present invention comprises an HDMI receiver; and a controller controlling transmission and reception of data of the HDMI receiver, wherein the sink device receives at least one of video data or audio data through HDMI from a source device, wherein the audio data include multi-stream audio; transmits a CEC message requesting multi-stream audio information to the source device; and receives a response CEC message including multi-stream audio information from the source device.

To solve the technical problem above, a method for transmitting and receiving data of a source device by using HDMI according to the present invention comprises transmitting at least one of video data or audio data to a sink device through HDMI, wherein the audio data include multi-stream audio; receiving a CEC message requesting multi-stream audio information from the sink device; and transmitting a response CEC message including multi-stream audio information to the sink device.

Also, in a method for transmitting and receiving data of a source device by using HDMI according to the present invention, the multi-stream audio information can include at least one of channel information or attribute information of multi-stream audio.

Also, a method for transmitting and receiving data of a source device by using HDMI according to the present invention can further comprise receiving a CEC message requesting change of a multi-stream audio channel from the sink device; and controlling transmission of the multi-stream audio according to the received CEC message.

Also, in a method for transmitting and receiving data of a source device by using HDMI according to the present invention, the CEC message requesting change of a multi-stream audio channel can include channel information of at least one audio among the multi-stream audio, and the multi-stream audio can include four audio channels.

In a source device transmitting and receiving data by using HDMI according to the present invention, a source device transmitting and receiving data by using HDMI comprises an HDMI transmitter transmitting and receiving data through HDMI; and a controller controlling data transmission and reception of the HDMI transmitter, wherein the source device transmits at least one of video data or audio data through HDMI to a sink device, wherein the audio data include multi-stream audio; receives a CEO message requesting multi-stream audio information from the sink device; and transmits a response CEC message including multi-stream audio information to the source device.

Advantageous Effect

According to the present invention, the user can control multi-stream audio transmitted from a source device by using a remote controller that transmits commands to a sink device.

Also, according to the present invention, by newly defining CEO messages for controlling multi-audio streams, the user can control multi-audio stream outputs of a source device by entering commands to a sink device through a remote controller.

Also, according to the present invention, by requesting/receiving multi-audio stream information in the form of a CEO message, a sink device may show information about multi-stream audio that can be provided or that is currently provided through a UI.

Also, if an output audio is determined among multi-stream audio, a source device may stop other audio stream outputs, thereby improving efficiency of utilizing HDMI bandwidth.

DESCRIPTION OF DRAWINGS

FIG. 1 illustrates an HDMI system according to one embodiment of the present invention and data transmission and reception channels included in the HDMI system.

FIG. 2 illustrates devices of an HDMI system according to one embodiment of the present invention and physical addresses assigned to the devices.

FIG. 3 illustrates devices of another HDMI system according to one embodiment of the present invention and logical addresses assigned to the devices.

FIG. 4 illustrates a header/data block as an HDMI CEC data format according to an embodiment of the present invention.

FIG. 5 illustrates an HDMI CEC sequence according to an embodiment of the present invention.

FIGS. 6 to 11 illustrate embodiments of various scenarios for controlling a source device by using the HDMI CEC protocol.

FIG. 12 illustrates HDMI CEC communication devices according to one embodiment of the present invention.

FIG. 13 is a flow diagram illustrating a method for controlling multi-stream audio by using the HDMI CEC protocol according to one embodiment of the present invention.

FIG. 14 illustrates a TV UI according to an embodiment of the present invention.

FIG. 15 illustrates a CEC message format according to an embodiment of the present invention.




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stats Patent Info
Application #
US 20170078739 A1
Publish Date
03/16/2017
Document #
15125519
File Date
03/11/2015
USPTO Class
Other USPTO Classes
International Class
/
Drawings
16


Audio Transmitting And Receiving

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20170316|20170078739|device and transmitting and receiving data using hdmi|A method for transmitting and receiving data of a sink device by using HDMI is disclosed. A method for transmitting and receiving data of a sink device by using HDMI according to the present invention comprises receiving at least one of video data or audio data from a source device |Lg-Electronics-Inc
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