Redundant data encoding methods and device

• US 8,879,857 B2
• Filed: 09/26/2006
• Issued: 11/04/2014
• Est. Priority Date: 09/27/2005
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Raveendran, Vijayalakshmi R., Walker, Gordon Kent, Tian, Tao, Bhamidipati, Phanikumar, Shi, Fang, Chen, Peisong, Subramania, Sitaraman Ganapathy, Oguz, Seyfullah Halit
• Primary Examiner(s): Seth, Manav
• Application Number:
  US11/528,307
• Publication Number:
  US 20070081588A1
• Time in Patent Office: 2,961 Days
• Field of Search: 382232-253, 348/14.09, 348/159, 3483841-4401, 375240-241
• US Class Current: 382/232
• CPC Class Codes: H04N 19/107 between spatial and temporal predictive coding, e.g. picture refresh
• CPC Class Codes: H04N 19/114 Adapting the group of pictures [GOP] structure, e.g. number of B-frames between two anchor frames H04N19/107 takes precedence
• CPC Class Codes: H04N 19/115 Selection of the code volume for a coding unit prior to coding
• CPC Class Codes: H04N 19/132 Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
• CPC Class Codes: H04N 19/137 Motion inside a coding unit, e.g. average field, frame or block difference
• CPC Class Codes: H04N 19/14 Coding unit complexity, e.g. amount of activity or edge presence estimation H04N19/146 takes precedence
• CPC Class Codes: H04N 19/142 Detection of scene cut or scene change
• CPC Class Codes: H04N 19/147 according to rate distortion criteria rate-distortion as a criterion for motion estimation H04N19/567
• CPC Class Codes: H04N 19/149 by estimating the code amount by means of a model, e.g. mathematical model or statistical model
• CPC Class Codes: H04N 19/154 Measured or subjectively estimated visual quality after decoding, e.g. measurement of distortion use of rate-distortion criteria H04N19/147
• CPC Class Codes: H04N 19/159 Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
• CPC Class Codes: H04N 19/172 the region being a picture, frame or field
• CPC Class Codes: H04N 19/18 the unit being a set of transform coefficients
• CPC Class Codes: H04N 19/187 the unit being a scalable video layer
• CPC Class Codes: H04N 19/194 involving only two passes
• CPC Class Codes: H04N 19/30 using hierarchical techniques, e.g. scalability H04N19/63 takes precedence
• CPC Class Codes: H04N 19/36 Scalability techniques involving formatting the layers as a function of picture distortion after decoding, e.g. signal-to-noise [SNR] scalability
• CPC Class Codes: H04N 19/40 using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
• CPC Class Codes: H04N 19/577 Motion compensation with bidirectional frame interpolation, i.e. using B-pictures
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/65 : using error resilience
• CPC Class Codes: H04N 19/86 : involving reduction of coding artifacts, e.g. of blockiness
• CPC Class Codes: H04N 19/87 : involving scene cut or scene change detection in combination with video compression
• CPC Class Codes: H04N 19/89 : involving methods or arrangements for detection of transmission errors at the decoder
• CPC Class Codes: H04N 21/234309 : by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 or from Quicktime to Realvideo conversion of standards in analog television systems H04N7/01
• CPC Class Codes: H04N 21/2353 : specifically adapted to content descriptors, e.g. coding, compressing or processing of metadata
• CPC Class Codes: H04N 21/2389 : Multiplex stream processing, e.g. multiplex stream encrypting
• CPC Class Codes: H04N 5/144 : Movement detection for video coding H04N19/503; analysis of motion in general G06T7/20
• CPC Class Codes: H04N 5/147 : Scene change detection
• CPC Class Codes: H04N 5/21 : Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
• CPC Class Codes: H04N 7/0115 : with details on the detection of a particular field or frame pattern in the incoming video signal, e.g. 3:2 pull-down pattern
• CPC Class Codes: H04N 7/012 : Conversion between an interlaced and a progressive signal for graphics images G09G2310/0229

Abstract

Apparatus and methods of using content information for encoding multimedia data are described. A method of processing multimedia data includes A method of processing multimedia data, including obtaining content information of multimedia data, and encoding the multimedia data to form an encoded bitstream, said encoding comprising inserting at least one redundant block of intra-coded data into the encoded bitstream based on the content information. In some aspects, the encoding comprises encoding the multimedia data into a base layer and an enhancement layer, and wherein the intra-coded data is encoded using the quantization parameter for the base layer. In other aspects, the intra-coded data is encoded using the quantization parameter for the enhancement layer.

Claims

1. A method of processing multimedia data, comprising:

obtaining content information of multimedia data by a transcoder of a computing device; and

encoding the multimedia data to form an encoded bitstream, by the transcoder of the computing device, said encoding comprising inserting at least one redundant block of intra-coded data into the encoded bitstream based on the content information, wherein the intra-coded data comprises at least one frame of redundant data, wherein the at least one frame of redundant data comprises a channel switch frame.

2. The method of claim 1, wherein the content information comprises a content classification.

3. The method of claim 2, wherein the content classification is based on a complexity of the multimedia data.

4. The method of claim 3, wherein the complexity comprises a spatial complexity and a temporal complexity.

5. The method of claim 3, wherein the amount of redundant data inserted is inversely proportionally to the complexity of the multimedia data.

6. The method of claim 1, wherein the at least one frame of redundant data comprises an I-frame.

7. The method of claim 1, wherein the at least one redundant block of intra-coded data comprises substantially all of an I-frame.

8. The method of claim 1, wherein the encoding comprises encoding the multimedia data into a base layer and an enhancement layer, and wherein the intra-coded data is encoded using a quantization parameter for the base layer.

9. The method of claim 1, wherein the encoding comprises encoding the multimedia data into a base layer and an enhancement layer, and wherein the intra-coded data is encoded using a quantization parameter for the enhancement layer.

10. An apparatus for processing multimedia data comprising:

a content classifier of a computing device configured to obtain content information of multimedia data; and

an encoder of the computing device configured to encode the multimedia data to form an encoded bitstream, said encoding comprising inserting at least one redundant block of intra-coded data into the encoded bitstream based on the content information, wherein the intra-coded data comprises at least one frame of redundant data, wherein the at least one frame of redundant data comprises a channel switch frame.

12. The apparatus of claim 10, wherein the content information comprises a content classification.

13. The apparatus of claim 12, wherein the content classification is based on a complexity of the multimedia data.

14. The apparatus of claim 13, wherein the complexity comprises a spatial complexity and a temporal complexity.

15. The apparatus of claim 13, wherein the amount of redundant data inserted is inversely proportionally to a complexity of the multimedia data.

16. The apparatus of claim 10, wherein the at least one frame of redundant data comprises an I-frame.

17. The apparatus of claim 10, wherein the at least one redundant block of intra-coded data comprises substantially all of an I-frame.

11. An apparatus for processing multimedia data comprising:

means for obtaining content information of multimedia data; and

means for encoding the multimedia data to form an encoded bitstream, said encoding comprising inserting at least one redundant block of intra-coded data into the encoded bitstream based on the content information, wherein the intra-coded data comprises at least one frame of redundant data, wherein the at least one frame of redundant data comprises a channel switch frame.

18. The apparatus of claim 11, wherein the means for encoding comprises encoding the multimedia data into a base layer and an enhancement layer, and wherein the intra-coded data is encoded using a quantization parameter for the base layer.

19. The apparatus of claim 11, wherein the means for encoding comprises encoding the multimedia data into a base layer and an enhancement layer, and wherein the intra-coded data is encoded using a quantization parameter for the enhancement layer.

20. A processor configured to:

obtain content information of multimedia data; and

encode the multimedia data to form an encoded bitstream, said encoding comprising inserting at least one redundant block of intra-coded data into the encoded bitstream based on the content information, wherein the intra-coded data comprises at least one frame of redundant data, wherein the at least one frame of redundant data comprises a channel switch frame.

21. The processor of claim 20, wherein the content information comprises a content classification.

22. The processor of claim 21, wherein the content classification is based on a complexity of the multimedia data.

23. The processor of claim 22, wherein the complexity comprises a spatial complexity and a temporal complexity.

24. A non-transitory machine-readable medium comprising instructions that upon execution cause a machine to:

obtain content information of multimedia data; and

encode the multimedia data to form an encoded bitstream, said encoding comprising inserting at least one redundant block of intra-coded data into the encoded bitstream based on the content information, wherein the intra-coded data comprises at least one frame of redundant data, wherein the at least one frame of redundant data comprises a channel switch frame.

25. The non-transitory machine-readable medium of claim 24, wherein the content information comprises a content classification.

26. The non-transitory machine-readable medium of claim 25, wherein the content classification is based on a complexity of the multimedia data.

27. The non-transitory machine-readable medium of claim 26, wherein the complexity comprises a spatial complexity and a temporal complexity.