Method of audio data transmission and system thereof

• US 20060209880A1
• Filed: 12/10/2004
• Published: 09/21/2006
• Est. Priority Date: 12/10/2004
• Status: Abandoned Application

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Hsuan, Ching Yeh, Hsiao, Chih-Hao, Chang, Andrew C.
• Application Number:
  US11/009,795
• Publication Number:
  US 20060209880A1
• Time in Patent Office: Days
• US Class Current: 370/464
• CPC Class Codes: H04N 19/895 in combination with error concealment
• CPC Class Codes: H04N 21/43635 HDMI

Abstract

In an embodiment, a transmitter generates a self-generated video signal when retrieving only audio input signal from an audio source to replace an video input signal expected by the HDMI system. In another embodiment, a transmitter sets a flag when retrieving only an audio input signal, wherein the flag configures preamble transmitted in control periods to allow audio data to be transmitted to a receiver without incorporated with video data.

Claims

1. A method for transmitting audio data using a High-definition Multimedia Interface (HDMI), comprising:

receiving input data;

self-generating video data if the input data contains no video data; and

transmitting the audio data in data island periods and the self-generated video data in video data periods.

2. The method according to claim 1, wherein the self-generated video data is a static picture.

3. A method for transmitting audio data using a High-definition Multimedia Interface (HDMI), comprising:

receiving input data;

setting a flag if the input data contains no video data;

configuring preambles transmitted in control periods to arrange a data island period after each control period once the flag is set; and

transmitting the audio data in data island periods.

4. The method according to claim 3, wherein the audio data is transmitted in the data island periods within horizontal blanking or vertical blanking periods.

5. The method according to claim 4, wherein the flag extends the horizontal blanking periods by configuring beginning and end points thereof.

6. The method according to claim 4, wherein the flag extends the vertical blanking periods by configuring beginning and end points thereof.

7. The method according to claim 3, further comprising instructing an HDMI receiver to turn off a display once the flag is set.

8. An HDMI transmitting system for transmitting audio data, comprising:

an audio processor, receiving and processing an audio input signal to generate audio data;

a video signal generator, generating a self-generated video signal if a video input signal is not available;

a mode indicator, reflecting if only the audio input signal is available or both audio and video input signals are available at the input of the HDMI transmitting system;

a video processor, receiving and processing the video input signal or the self-generated video signal to generate video data according to the mode indicator; and

an HDMI transmitter, receiving the audio and video data from the audio processor and video processor respectively, and outputting an HDMI signal carrying the audio data in data island periods and the video data in video data periods, respectively.

9. The HDMI transmitting system according to claim 8, wherein the self-generated video signal output from the video signal generator is a static picture.

10. An HDMI transmitting system for transmitting audio data, comprising:

an audio processor, receiving and processing an audio input signal to generate audio data; and

an HDMI transmitter, receiving the audio data from the audio processor and outputting an HDMI signal, comprising a mode indicator setting a flag if only the audio input signal is available at the input of the HDMI transmitting system, and outputting the HDMI signal comprising only data island periods and control periods if the flag is set.

11. The HDMI transmitting system according to claim 10, wherein the HDMI transmitter transmits the audio data in the data island periods within horizontal blanking or vertical blanking periods.

12. The HDMI transmitting system according to claim 11, wherein the flag extends the horizontal blanking periods by configuring beginning and end points thereof.

13. The HDMI transmitting system according to claim 11, wherein the flag extends the vertical blanking periods by configuring beginning and end points thereof.

14. The HDMI transmitting system according to claim 10, wherein the flag configures preambles transmitted in the control periods indicating a next data period is a data island period for transmitting audio data.

15. The HDMI transmitting system according to claim 10, wherein the HDMI transmitter instructs an HDMI receiver to turn off a display when the flag is set.

16. A system for transmitting audio data using HDMI, comprising:

an audio source, providing an audio input signal;

a transmitter, comprising;

an audio processor, receiving and processing the audio input signal from the audio source to generate audio data;

a mode indicator, reflecting if only the audio input signal is available or both audio and video input signals are available at the input of the HDMI transmitting system;

a video signal generator, generating a self-generated video signal if a video input signal is not available;

a video processor, receiving and processing the video input signal or the self-generated video signal to generate video data according to the mode indicator; and

an HDMI transmitter, receiving the audio and video data from the audio processor and video processor respectively, and outputting an HDMI signal carrying the audio data in data island periods and the video data in video data periods; and

a receiver, receiving the HDMI signal from the transmitter.

17. The system according to claim 16, wherein the self-generated video signal generated by the video signal generator in the transmitter is a static picture.

18. A system for transmitting audio data using a HDMI, comprising:

an audio source, providing an audio input signal;

a transmitter, comprising;

an audio processor, receiving and processing the audio input signal from the audio source to generate audio data; and

an HDMI transmitter, receiving the audio data from the audio processor and outputting an HDMI signal, comprises a mode indicator setting a flag if only the audio input signal is available at the input of the HDMI transmitting system, and outputting the HDMI signal comprising only data island periods and control periods if the flag is set; and

a receiver, receiving the HDMI signal from the transmitter.

19. The system according to claim 18, wherein the transmitter transmits the audio data in data island periods within horizontal blanking or vertical blanking periods.

20. The system according to claim 19, wherein the flag extends the horizontal blanking periods by configuring beginning and end points thereof.

21. The system according to claim 19, wherein the flag extends the vertical blanking periods by configuring beginning and end points thereof.

22. The system according to claim 18, wherein the flag configures preambles transmitted in the control periods indicating a next data period is a data island period.

23. The system according to claim 18, wherein the transmitter instructs the receiver to turn off a display when the flag is set.