METHOD, APPARATUS, AND SYSTEM FOR ENHANCING ROBUSTNESS OF PREDICTIVE VIDEO CODECS USING A SIDE-CHANNEL BASED ON DISTRIBUTED SOURCE CODING TECHNIQUES

• US 20080267288A1
• Filed: 05/15/2008
• Published: 10/30/2008
• Est. Priority Date: 06/01/2004
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Garudadri, Harinath, Srinivasamurthy, Naveen B., Chung, Hyukjune, Majumdar, Abhik, Ramachandran, Kannan
• Granted Patent: US 8,379,716 B2
• Time in Patent Office: Days
• US Class Current: 375/240.12
• CPC Class Codes: H04L 1/0014 by adapting the source coding
• CPC Class Codes: H04L 1/22 using redundant apparatus to increase reliability
• CPC Class Codes: H04L 2001/0096 Channel splitting in point-to-point links
• CPC Class Codes: H04N 19/39 involving multiple description coding [MDC], i.e. with separate layers being structured as independently decodable descriptions of input picture data
• CPC Class Codes: H04N 19/395 involving distributed video coding [DVC], e.g. Wyner-Ziv video coding or Slepian-Wolf video coding

Abstract

A method, apparatus, and system for providing distributed source coding techniques that improve data coding performance, such as video data coding, when channel errors or losses occur. Errors in the reconstruction of the data is eliminated or reduced by sending extra information. Correlation between a predicted sequence and an original sequence can be used to design codebooks and find the cosets required to represent the original image. This information may be sent over another channel, or a secondary channel.

Claims

1. A wireless communication device comprising:

a predictive decoder configured to receive an inter-predictive encoded bit-stream representation of an original signal, decode the inter-predictive encoded bit-stream according to a predictive decoding technique, and to output a reconstructed signal;

a secondary channel decoder configured to receive a secondary channel encoded bit-stream representation of the original signal and the reconstructed signal, decode the secondary channel encoded bit-stream according to a secondary channel decoding technique, and to combine the decoded secondary channel encoded bit-stream and the reconstructed signal to generate and output a final reconstruction of the original signal,

wherein the secondary channel decoder is further configured to receive header information that includes a number of cosets used for decoding the secondary channel encoded bit-stream, and wherein the number of cosets is based on a correlation estimate calculated during encoding of the secondary channel encoded bit-stream.

2. A wireless communication device as defined in claim 1, wherein the inter-predictive encoded bit-stream is received over a main communication channel.

3. A wireless communication device as defined in claim 1, wherein the secondary channel encoded bit-stream is received over a secondary channel communication channel.

4. A wireless communication device as defined in claim 1, wherein the predictive decoding technique is a technique compatible with MPEG-4 standard.

5. A wireless communication device as defined in claim 1, wherein the predictive decoding technique is a technique compatible with H.26×

standard.

6. A wireless communication device as defined in claim 1, wherein the secondary channel decoding technique is a technique compatible with Wyner Ziv techniques.

7. A wireless communication device as defined in claim 1, wherein the original signal is a video signal.

8. A wireless communication device as defined in claim 1, wherein the original signal comprises intra-coded blocks of data and inter-coded blocks of data.

9. A wireless communication device as defined in claim 8, wherein Wyner-Ziv techniques are applied to the inter-coded data blocks.

10. A wireless communication device as defined in claim 1, wherein the secondary channel decoder will decode the secondary channel encoded bit-stream using a predetermined number of cosets.

11. A wireless communication device as defined in claim 10, wherein the number of predetermined cosets is included within a header of the secondary channel encoded bit-stream.

25. The wireless communication device as defined in claim 1, further comprising a receiver that receives the predictive encoded bit-stream and the secondary channel encoded bit-stream over a single wireless communication channel, and transmits the predictive encoded bit-stream to the predictive decoder and the secondary channel encoded bit-stream to the secondary channel decoder.

26. The wireless communication device as defined in claim 25,

wherein the predictive encoded bit-stream is received from a first logical channel within the single wireless communication channel, and

wherein the secondary channel encoded bit-stream is received from a second logical channel within the single wireless communication channel.

12. A method of decoding data, the method comprising:

receiving an inter-predictive encoded bit-stream representation of an original signal;

decoding the inter-predictive encoded bit-stream according to a predictive decoding technique, and to output a reconstructed signal;

receiving a secondary channel encoded bit-stream representation of the original signal, the reconstructed signal, and header information that includes a number of cosets used for decoding the secondary channel encoded bit-stream, wherein the number of cosets is based on a correlation estimate calculated during encoding of the secondary channel encoded bit-stream; and

decoding the secondary channel encoded bit-stream according to a secondary channel encoding technique, and combining the decoded secondary channel encoded bit-stream and the reconstructed signal to generate and output a final reconstruction of the original signal.

13. A method of decoding as defined in claim 12, wherein the predictive decoding technique is a technique compatible with MPEG-4 standard.

14. A method of decoding as defined in claim 12, wherein the predictive decoding technique is a technique compatible with H.26×

standard.

15. A method of decoding as defined in claim 12, wherein the secondary channel decoding technique is a technique compatible with Wyner Ziv techniques.

16. A method of decoding as defined in claim 12, wherein the original signal is a video signal.

17. A method of decoding as defined in claim 12, wherein the original signal comprises intra-coded blocks of data and inter-coded blocks of data.

18. A method of decoding as defined in claim 17, wherein Wyner Ziv techniques are applied to the inter-coded data blocks.

19. A method of decoding as defined in claim 12, wherein the secondary channel decoder will decode the secondary channel encoded bit-stream using a predetermined number of cosets.

20. A method of decoding as defined in claim 19, wherein the number of predetermined cosets is included within a header of the secondary channel encoded bit-stream.

21. A computer-readable medium comprising instructions that upon execution by a processor cause the processor to:

receive a first bit-stream representation of an original signal, wherein the first bit-stream representation of the original signal is an inter-predictive encoded bit-stream;

decode the first bit-stream according to a predictive decoding technique, and to output a reconstructed signal;

receive a second bit-stream representation of the original signal, the reconstructed signal, and header information that includes a number of cosets used for decoding the second bit-stream, wherein the number of cosets is based on a correlation estimate calculated during encoding of the second bit-stream; and

decode the second bit-stream according to a secondary channel decoding technique, and combining the decoded second bit-stream and the reconstructed signal to generate and output a final reconstruction of the original signal.

22. The computer-readable medium as defined in claim 21, wherein the first bit-stream is encoded according to a predictive encoding technique.

23. The computer-readable medium as defined in claim 21, wherein the second bit-stream is encoded according to a secondary channel encoding technique.

24. A wireless communication device comprising:

means for receiving a first bit-stream representation of an original signal, wherein the first bit-stream is an inter-predictive encoded bit-stream;

means for decoding the first bit-stream according to a predictive decoding technique, and to output a reconstructed signal;

means for receiving a second bit-stream representation of the original signal, the reconstructed signal, and header information that includes a number of cosets used for decoding the second bit-stream, wherein the number of cosets is based on a correlation estimate calculated during encoding of the second bit-stream; and

means for decoding the second bit-stream according to a secondary channel encoding technique, and combining the decoded second bit-stream and the reconstructed signal to generate and output a final reconstruction of the original signal.