Inter-plane prediction

• US 10,855,995 B2
• Filed: 11/18/2019
• Issued: 12/01/2020
• Est. Priority Date: 04/13/2010
• Status: Active Grant

• Current Assignee: GE Video Compression, LLC (General Electric Company)
• Original Assignee: GE Video Compression, LLC (General Electric Company)
• Inventors: Winken, Martin, Kirchhoffer, Heiner, Schwarz, Heiko, Marpe, Detlev, Wiegand, Thomas
• Primary Examiner(s): Retallick, Kaitlin A
• Application Number:
  US16/686,558
• Publication Number:
  US 20200084458A1
• Time in Patent Office: 379 Days
• Field of Search: None
• CPC Class Codes: H04N 19/103 Selection of coding mode or of prediction mode
• CPC Class Codes: H04N 19/11 among a plurality of spatial predictive coding modes
• CPC Class Codes: H04N 19/119 Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
• 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 19/159 Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/186 the unit being a colour or a chrominance component
• CPC Class Codes: H04N 19/196 being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters processing of motion vectors H04N19/513
• CPC Class Codes: H04N 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/463 by compressing encoding parameters before transmission
• CPC Class Codes: H04N 19/597 specially adapted for multi-view video sequence encoding
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards
• CPC Class Codes: H04N 19/96 Tree coding, e.g. quad-tree coding

Abstract

A better rate distortion ratio is achieved by making interrelationships between coding parameters of different planes available for exploitation for the aim of redundancy reduction despite the additional overhead resulting from the need to signal the inter-plane prediction information to the decoder. In particular, the decision to use inter plane prediction or not may be performed for a plurality of planes individually. Additionally or alternatively, the decision may be done on a block basis considering one secondary plane.

Claims

1. A decoder for decoding a data stream encoded with a video including pictures of a scene represented by multiple arrays of information samples, comprising:

an extractor configured for;

extracting, from the data stream, a first set of coding parameters including a first intra coding parameter associated with a first intra coding block in a first array of information samples that represents a first color component of the video, wherein the first set of coding parameters is to be used for reconstructing the first intra coding block in an intra coding mode,

extracting, from the data stream, inter-plane interchange information associated with a second intra coding block in a second array of information samples that represents a second color component of the video, wherein the inter-plane interchange information signals whether intra coding information of the second intra coding block in the intra coding mode is to be derived based on a combination of the reconstructed first intra coding block and one or more of a second set of coding parameters, and

responsive to the inter-plane interchange information indicating no derivation of the intra coding information of the second intra coding block based on the combination, extracting, from the data stream, the second set of coding parameters including a second intra coding parameter; and

a predictor configured for;

responsive to the inter-plane interchange information indicating derivation of the intra coding information of the second intra coding block based on the combination, deriving the intra coding information for the second intra coding block based on the combination of the reconstructed first intra coding block and the one or more of the second set of parameters, and

predicting the second intra coding block based on the second set of coding parameters including the second intra coding parameter to generate a predicted second intra coding block based on the intra coding mode,

wherein the first and second arrays of information samples represent different types of spatially sampled information of the scene.

2. The decoder of claim 1, wherein the extractor is further configured for extracting, from the data stream in accordance with the second set of coding parameters, residual information associated with the second coding block.

3. The decoder of claim 2, further comprising a reconstructor configured for reconstructing the second coding block based on the predicted second coding block and the residual information associated with the second coding block.

4. The decoder of claim 1, wherein the different types of spatially sampled information include brightness, color, depth, or transparency information of the scene.

5. The decoder of claim 1, wherein coding parameters in the first and second set of coding parameters include motion parameters for inter-prediction.

6. The decoder of claim 1, wherein coding parameters in the first and second set of coding parameters include subdivision information that specifies how a coding block is to be sub-divided.

7. The decoder of claim 6, wherein first subdivision of the first array of information samples differs from second subdivision of the second array of information samples.

8. The decoder of claim 1, wherein a scaling factor for a spatial resolution of the first array of information samples relative to the second array of information samples in a first direction differs from a scaling factor for a spatial resolution of the first array of information samples relative to the second array of information samples in a second direction.

9. A method for decoding a data stream encoded with a video including pictures of a scene represented by multiple arrays of information samples, comprising:

extracting, from the data stream, a first set of coding parameters including a first intra coding parameter associated with a first intra coding block in a first array of information samples that represents a first color component of the video, wherein the first set of coding parameters is to be used for reconstructing the first intra coding block in an intra coding mode;

extracting, from the data stream, inter-plane interchange information associated with a second intra coding block in a second array of information samples that represents a second color component of the video, wherein the inter-plane interchange information signals whether intra coding information of the second intra coding block in the intra coding mode is to be derived based on a combination of the reconstructed first intra coding block and one or more of a second set of coding parameters;

responsive to the inter-plane interchange information indicating no derivation of the intra coding information of the second intra coding block based on the combination, extracting, from the data stream, the second set of coding parameters including a second intra coding parameter;

responsive to the inter-plane interchange information indicating derivation of the intra coding information of the second intra coding block based on the combination, deriving the intra coding information for the second intra coding block based on the combination of the reconstructed first intra coding block and the one or more of the second set of parameters; and

predicting the second intra coding block based on the second set of coding parameters including the second intra coding parameter to generate a predicted second intra coding block based on the intra coding mode,

wherein the first and second arrays of information samples represent different types of spatially sampled information of the scene.

10. The method of claim 9, further comprising extracting, from the data stream in accordance with the second set of coding parameters, residual information associated with the second coding block.

11. The method of claim 10, further comprising reconstructing the second coding block based on the predicted second coding block and the residual information associated with the second coding block.

12. The method of claim 9, wherein the different types of spatially sampled information include brightness, color, depth, or transparency information of the scene.

13. The method of claim 9, wherein coding parameters in the first and second set of coding parameters include motion parameters for inter-prediction.

14. The method of claim 9, wherein coding parameters in the first and second set of coding parameters include subdivision information that specifies how a coding block is to be sub-divided.

15. The method of claim 14, wherein first subdivision of the first array of information samples differs from second subdivision of the second array of information samples.

16. The method of claim 9, wherein a scaling factor for a spatial resolution of the first array of information samples relative to the second array of information samples in a first direction differs from a scaling factor for a spatial resolution of the first array of information samples relative to the second array of information samples in a second direction.

17. An encoder for encoding, into a data stream, a video including pictures of a scene represented by multiple arrays of information samples, comprising:

a data stream inserter configured for;

inserting, into the data stream, a first set of coding parameters including a first intra coding parameter associated with a first intra coding block in a first array of information samples that represents a first color component of the video, wherein the first set of coding parameters is to be used for reconstructing the first intra coding block in an intra coding mode,

inserting, into the data stream, inter-plane interchange information associated with a second intra coding block in a second array of information samples that represents a second color component of the video, wherein the inter-plane interchange information signals whether intra coding information of the second intra coding block in the intra coding mode is to be derived based on a combination of the reconstructed first intra coding block and one or more of a second set of coding parameters, and

responsive to the inter-plane interchange information indicating no derivation of the intra coding information of the second intra coding block based on the combination, inserting, into the data stream, the second set of coding parameters including a second intra coding parameter; and

a predictor configured for responsive to the inter-plane interchange information indicating derivation of the intra coding information of the second intra coding block based on the combination, deriving the intra coding information for the second intra coding block based on the combination of the reconstructed first intra coding block and the one or more of the second set of parameters, and

predicting the second intra coding block based on the second set of coding parameters including the second intra coding parameter to generate a predicted second intra coding block based on the intra coding mode,

wherein the first and second arrays of information samples represent different types of spatially sampled information of the scene.

18. The encoder of claim 17, the data stream inserter is further configured for inserting, into the data stream in accordance with the second set of coding parameters, residual information associated with the second coding block.

19. The encoder of claim 18, further comprising a reconstructor configured for reconstructing the second coding block based on the predicted second coding block and the residual information associated with the second coding block.

20. The encoder of claim 17, wherein the different types of spatially sampled information include brightness, color, depth, or transparency information of the scene.

21. The encoder of claim 17, wherein coding parameters in the first and second set of coding parameters include motion parameters for inter-prediction.

22. The encoder of claim 17, wherein coding parameters in the first and second set of coding parameters include subdivision information that specifies how a coding block is to be sub-divided.

23. The encoder of claim 22, wherein first subdivision of the first array of information samples differs from second subdivision of the second array of information samples.

24. The encoder of claim 17, wherein a scaling factor for a spatial resolution of the first array of information samples relative to the second array of information samples in a first direction differs from a scaling factor for a spatial resolution of the first array of information samples relative to the second array of information samples in a second direction.

25. A non-transitory computer-readable medium for storing data associated with a video, comprising:

a data stream stored in the non-transitory computer-readable medium, the data stream related to a video including pictures of a scene represented by multiple arrays of information samples, and comprising;

a first set of coding parameters including a first intra coding parameter associated with a first intra coding block in a first array of information samples that represents a first color component of the video, wherein the first set of coding parameters is to be used for reconstructing the first intra coding block in an intra coding mode,

inter-plane interchange information associated with a second intra coding block in a second array of information samples that represents a second color component of the video, wherein the inter-plane interchange information signals whether intra coding information of the second intra coding block in the intra coding mode is to be derived based a combination of on the reconstructed first intra coding block and one or more of a second set of coding parameters, and

the second set of coding parameters including a second intra coding parameter,

wherein responsive to the inter-plane interchange information indicating derivation of the intra coding information of the second intra coding block based on the combination, the intra coding information for the second intra coding block is derived based on the combination of the reconstructed first intra coding block and the one or more of the second set of parameters, and the second intra coding block is predicted based on the second set of coding parameters including the second intra coding parameter to generate a predicted second intra coding block,

wherein, based on the predicted second block, residual information associated with the second intra coding block is to be derived, and the first and second arrays of information samples representing different types of spatially sampled information of the scene.

26. The computer-readable medium of claim 25, wherein the data stream further comprises the residual information associated with the second coding block.

27. The computer-readable medium of claim 26, wherein the second coding block is reconstructed based on the predicted second coding block and the residual information associated with the second coding block.

28. The computer-readable medium of claim 25, wherein the different types of spatially sampled information include brightness, color, depth, or transparency information of the scene.

29. The computer-readable medium of claim 25, wherein coding parameters in the first and second set of coding parameters include motion parameters for inter-prediction.

30. The computer-readable medium of claim 25, wherein coding parameters in the first and second set of coding parameters include subdivision information that specifies how a coding block is to be sub-divided.