Moving picture coding/decoding method and apparatus

• US 20060233251A1
• Filed: 04/18/2006
• Published: 10/19/2006
• Est. Priority Date: 04/18/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Birinov, Dmitri, Kim, Hyun Mun, Cho, Daesung, Kim, Wooshik
• Granted Patent: US 8,958,476 B2
• Time in Patent Office: Days
• US Class Current: 375/240.120
• CPC Class Codes: H04N 19/103 Selection of coding mode or of prediction mode
• CPC Class Codes: H04N 19/105 Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
• CPC Class Codes: H04N 19/107 between spatial and temporal predictive coding, e.g. picture refresh
• CPC Class Codes: H04N 19/109 among a plurality of temporal predictive coding modes
• CPC Class Codes: H04N 19/11 among a plurality of spatial predictive coding modes
• CPC Class Codes: H04N 19/117 Filters, e.g. for pre-processing or post-processing sub-band filter banks H04N19/635
• 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 19/136 Incoming video signal characteristics or properties
• CPC Class Codes: H04N 19/139 Analysis of motion vectors, e.g. their magnitude, direction, variance or reliability
• 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 19/176 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 19/40 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 19/44 Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
• CPC Class Codes: H04N 19/50 using predictive coding H04N19/61 takes precedence
• CPC Class Codes: H04N 19/503 involving temporal prediction adaptive coding with adaptive selection between spatial and temporal predictive coding H04N19/107; adaptive coding with adaptive selection among a plurality of temporal predictive coding modes H04N19/109
• CPC Class Codes: H04N 19/51 Motion estimation or motion compensation
• CPC Class Codes: H04N 19/593 involving spatial prediction techniques
• CPC Class Codes: H04N 19/60 using transform coding
• CPC Class Codes: H04N 19/61 : in combination with predictive coding
• CPC Class Codes: H04N 19/85 : using pre-processing or post-processing specially adapted for video compression
• CPC Class Codes: H04N 19/86 : involving reduction of coding artifacts, e.g. of blockiness
• CPC Class Codes: H04N 19/91 : Entropy coding, e.g. variable length coding [VLC] or arithmetic coding

Abstract

A moving picture coding/decoding method and apparatus with improved coding efficiency. A moving picture coding method includes selecting a color space from among a plurality of color spaces, selecting a prediction mode to be commonly applied to all the color components constituting the selected color space, generating first residual data corresponding to differences between a current picture and a predicted picture for each of the color components according to the selected prediction mode, generating second residual data corresponding to differences between the first residual data, and coding the second residual data.

Claims

1. A moving picture coding method comprising:

(a) selecting a prediction mode to be commonly applied to all color components constituting a color space;

(b) generating first residual data corresponding to differences between a current picture and a predicted picture for each of the color components according to the prediction mode selected in operation (a);

(c) generating second residual data corresponding to differences between the first residual data for each of the color components; and

(d) coding the generated second residual data.

2. The moving picture coding method of claim 1, wherein operation (a) comprises selecting an inter prediction mode to be commonly applied to all the color components, and operation (b) comprises generating the first residual data according to the selected inter prediction mode.

3. The moving picture coding method of claim 1, wherein operation (a) comprises selecting an intra prediction mode to be commonly applied to all the color components, and operation (b) comprises generating the first residual data according to the selected intra prediction mode.

4. The moving picture coding method of claim 1, wherein operation (a) comprises selecting a size of blocks to be commonly applied to all the color components, and operation (b) comprises generating the first residual data in units of blocks corresponding to the selected size of blocks.

5. The moving picture coding method of claim 1, wherein operation (a) comprises selecting a motion vector to be commonly applied to all the color components, and operation (b) comprises generating a predicted picture from a reference picture using the selected motion vector and generating the first residual data corresponding to differences between the current picture and the generated predicted picture for each of the color components.

6. The moving picture coding method of claim 1, wherein operation (a) comprises selecting a prediction direction to be commonly applied to all the color components, and operation (b) comprises generating the predicted picture from adjacent pixels indicated by the selected predicted direction, and generating the first residual data corresponding to e differences between the current picture and the generated predicted picture for each of the color components.

7. A computer readable recording medium having embodied thereon a computer program for the moving picture coding method of claim 1.

8. A moving picture coding apparatus comprising:

a selection unit selecting a prediction mode to be commonly applied to all color components constituting a color space;

a subtractor generating first residual data corresponding to differences between a current picture and a predicted picture for each of the color components according to the prediction mode selected by the selection unit;

a transform unit generating second residual data corresponding to differences between the first residual data generated by the subtractor; and

a coding unit coding the second residual data generated by the transform unit.

9. A moving picture coding method comprising:

(a) selecting a color space from among a plurality of color spaces;

(b) generating first residual data corresponding to differences between a current picture and a predicted picture for each color component constituting the selected color space;

(c) generating second residual data corresponding to differences between the generated first residual data; and

(d) coding the generated second residual data.

10. The moving picture coding method of claim 9, wherein operation (a) comprises adaptively selecting one of the color spaces based on characteristics of the current picture.

11. The moving picture coding method of claim 9, wherein operation (a) comprises selecting one of a YCgCo color space and a RGB color space.

12. A computer readable recording medium having embodied thereon a computer program for the moving picture coding method of claim 9.

13. A moving picture coding apparatus comprising:

a selection unit selecting a color space from among a plurality of color spaces;

a subtractor generating first residual data corresponding to differences between a current picture and a predicted picture for each color component constituting the color space selected by the selection unit;

a transform unit generating second residual data corresponding to differences between the first residual data generated by the subtractor; and

a coding unit coding the second residual data generated by the transform unit.

14. A moving picture coding method comprising:

(a) selecting a color space from among a plurality of color spaces;

(b) selecting a prediction mode to be commonly applied to all color components constituting the selected color space;

(b) generating first residual data corresponding to differences between a current picture and a predicted picture for each of the color components constituting the selected color space according to the selected prediction mode;

(c) generating second residual data corresponding to differences between the generated first residual data; and

(d) coding the generated second residual data.

15. A computer readable recording medium having embodied thereon a computer program for the moving picture coding method of claim 14.

16. A moving picture coding apparatus comprising:

a first selection unit selecting a color space from among a plurality of color spaces;

a second selection unit selecting a prediction mode to be commonly applied to all color components constituting the color space selected by the first selection unit;

a subtractor generating first residual data corresponding to differences between a current picture and a predicted picture for each of the color components according to the prediction mode selected by the second selection unit;

a transform unit generating second residual data corresponding to differences between the first residual data generated by the subtractor; and

a coding unit coding the second residual data generated by the transform unit.

17. A moving picture coding method comprising:

(a) selecting first prediction modes to be independently applied to color components constituting a color space or a second prediction mode to be commonly applied to all color components of the color space; and

(b) generating first residual data corresponding to differences between a current picture and a predicted picture for each of the color components according to the first prediction modes or the second prediction mode selected in operation (a).

18. The moving picture coding method of claim 17, further comprising:

(c) generating second residual data corresponding to differences between the first residual data for each of the color components; and

(d) coding the generated second residual data.

19. A computer readable recording medium having embodied thereon a computer program for the method of claim 17.

20. A moving picture coding apparatus comprising:

a selection unit selecting first prediction modes to be independently applied to color components constituting a color space or a second prediction mode to be commonly applied to all color components of the color space; and

a subtractor generating first residual data corresponding to differences between a current picture and a predicted picture for each of the color components according to the first prediction modes or the second prediction mode selected by the selection unit.

21. A moving picture decoding method comprising:

(a) generating second residual data corresponding to differences between first residual data by decoding a bitstream;

(b) generating the first residual data corresponding to a sum of the generated second residual data in a color space;

(c) generating a prediction picture for each color component constituting the color space according to a prediction mode that is commonly applied to all the color components; and

(d) generating a reconstructed picture corresponding to a sum of the generated first residual data and the generated predicted pictures.

22. The moving picture decoding method of claim 21, wherein operation (a) comprises decoding a bitstream received from a moving picture coding apparatus, and operation (c) comprises generating the predicted picture according to a prediction mode used in the moving picture coding apparatus.

23. The moving picture decoding method of claim 21, wherein operation (c) comprises generating the predicted picture for each of the color components according to an inter prediction mode that is commonly applied to all the color components.

24. The moving picture decoding method of claim 21, wherein operation (c) comprises generating the predicted picture for each of the color components according to an intra prediction mode that is commonly applied to all the color components.

25. The moving picture decoding method of claim 21, wherein operation (c) comprises generating the predicted picture for each of the color components in units of blocks corresponding to a size of blocks that is commonly applied to all the color components.

26. The moving picture decoding method of claim 21, wherein operation (c) comprises generating the predicted picture for each of the color components from a reference picture using a motion vector that is commonly applied to all the color components.

27. The moving picture decoding method of claim 21, wherein operation (c) comprises generating the predicted picture for each of the color components from adjacent pixels indicated by a prediction direction that is commonly applied to all the color components.

28. A computer readable recording medium having embodied thereon a computer program for the moving picture decoding method of claim 21.

29. A moving picture decoding apparatus comprising:

a decoding unit generating second residual data corresponding to differences between first residual data by decoding a bitstream;

an inverse transform unit generating first residual data corresponding to a sum of the generated second residual data in a color space;

a prediction unit generating a prediction picture for each color component constituting the color space according to a prediction mode that is commonly applied to all the color components; and

an adder generating a reconstructed picture corresponding to a sum of the first residual data generated by the inverse transform unit and the predicted pictures generated by the prediction unit.

30. A moving picture decoding method comprising:

(a) generating second residual data corresponding to differences between first residual data by decoding a bitstream;

(b) generating the first residual data corresponding to a sum of the generated second residual data in a color space selected from among a plurality of color spaces; and

(c) generating a reconstructed picture corresponding to a sum of the generated first residual data and predicted pictures.

31. The moving picture decoding method of claim 30, wherein operation (a) comprises decoding a bitstream received from a moving picture coding apparatus, and operation (b) comprises generating the first residual data in a color space used in the moving picture coding apparatus.

32. The moving picture decoding method of claim 30, wherein operation (b) comprises generating the first residual data in one of a YCgCo color space and a RGB color space.

33. A computer readable recording medium having embodied thereon a computer program for the moving picture decoding method of claim 30.

34. A moving picture decoding apparatus comprising:

a decoding unit generating second residual data corresponding to differences between first residual data by decoding a bitstream;

an inverse transform unit generating the first residual data corresponding to a sum of the generated second residual data in a color space selected from among a plurality of color spaces; and

an adder generating a reconstructed picture corresponding to a sum of the first residual data generated by the inverse transform unit and predicted pictures.

35. A moving picture decoding method comprising:

(a) generating second residual data corresponding to differences between first residual data by decoding a bitstream;

(b) generating the first residual data corresponding to a sum of the generated second residual data in a color space selected from among a plurality of color spaces;

(c) generating a predicted picture for each color component of the color space according to a prediction mode that is commonly applied to all the color components; and

(d) generating a reconstructed picture corresponding to a sum of the generated first residual data and the generated predicted pictures.

36. A computer readable recording medium having embodied thereon a computer program for the moving picture decoding method of claim 35.

37. A moving picture decoding apparatus comprising:

a decoding unit generating second residual data corresponding to differences between first residual data by decoding a bitstream;

an inverse transform unit generating the first residual data corresponding to a sum of the generated second residual data in a color space selected from among a plurality of color spaces;

a prediction unit generating a predicted picture for each of the color components constituting the color space according to a prediction mode that is commonly applied to all the color components; and

an adder generating a reconstructed picture corresponding to a sum of the first residual data generated by the inverse transform unit and the predicted pictures generated by the prediction unit.

41. A computer readable recording medium having embodied thereon a computer program for the moving picture decoding method of claim 37.

38. A moving picture decoding method comprising:

(a) generating a prediction picture for each color component constituting the color space according to first prediction modes that are independently applied to the color components constituting the color space or a second prediction mode that is commonly applied to all the color components; and

(b) generating a reconstructed picture based on the generated predicted pictures.

39. The moving picture decoding method of claim 38, further comprising:

(c) generating second residual data corresponding to differences between first residual data by decoding a bitstream; and

(d) generating the first residual data corresponding to a sum of the generated second residual data in a color space,

wherein operation (b) comprises generating the reconstructed picture corresponding to a sum of the generated first residual data and the generated predicted pictures.

40. The moving picture decoding method of claim 38, wherein operation (a) comprises generating the prediction picture according to the first prediction modes or the second prediction mode based on a flag transmitted from a moving picture coding apparatus.

42. A moving picture decoding apparatus comprising:

a prediction unit generating a prediction picture for each color component constituting the color space according to first prediction modes that are independently applied to the color components constituting the color space or a second prediction mode that is commonly applied to all the color components constituting the color space; and

an adder generating a reconstructed picture based on the predicted pictures generated by the prediction unit.