Inter-Layer Prediction Method for Video Signal

• US 20090147848A1
• Filed: 01/09/2007
• Published: 06/11/2009
• Est. Priority Date: 01/09/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jeon, Byeong Moon, Park, Ji Ho, Park, Seung Wook
• Granted Patent: US 8,457,201 B2
• Time in Patent Office: Days
• US Class Current: 375/240.130
• 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 19/159 Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
• CPC Class Codes: H04N 19/16 for a given display mode, e.g. for interlaced or progressive display mode
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/187 the unit being a scalable video layer
• CPC Class Codes: H04N 19/33 in the spatial domain
• CPC Class Codes: H04N 19/513 Processing of motion vectors
• CPC Class Codes: H04N 19/59 involving spatial sub-sampling or interpolation, e.g. alteration of picture size or resolution
• CPC Class Codes: H04N 19/86 involving reduction of coding artifacts, e.g. of blockiness

Abstract

The present invention relates to a method for conducting interlayer texture prediction in encoding or decoding of video signal. The present method constructs a pair of frame macro blocks from a single field macro block or vertically-adjacent two field macro blocks of a base layer, and using texture information of the constructed pair of frame macro blocks in interlayer texture predication of a pair of frame macro blocks of a current layer.

Claims

1. A method for encoding or decoding a video signal, the method comprising:

a) constructing a pair of field macroblocks from a pair of vertically adjacent frame macroblocks of a base layer; and

b) using respective texture information of the constructed pair of field macroblocks as respective texture prediction information of a pair of field macroblocks of a current layer.

2. The method according to claim 1, wherein the step a) includes arranging even lines of a top macroblock of the pair of frame macroblocks in an upper portion and even lines of a bottom macroblock of the pair of frame macroblocks in a lower portion to construct a top field macroblock of the pair of field macroblocks and arranging odd lines of the top macroblock of the pair of frame macroblocks in an upper portion and odd lines of the bottom macroblock of the pair of frame macroblocks in a lower portion to construct a bottom field macroblock of the pair of field macroblocks.

3. The method according to claim 1, wherein the step b) includes using the respective texture information of the constructed pair of field macroblocks as intra base prediction information if both of the pair of frame macroblocks are of intra mode and using the respective texture information of the constructed pair of field macroblocks as residual prediction information if both of the pair of frame macroblocks are of inter mode.

4. A method for encoding or decoding a video signal, the method comprising:

a) constructing a single field macroblock from a pair of vertically adjacent frame macroblocks of a base layer; and

b) using texture information of the constructed single field macroblock as texture prediction information of a field macroblock of a current layer.

5. The method according to claim 4, wherein the step a) includes arranging even lines of a top macroblock of the pair of frame macroblocks in an upper portion and even lines of a bottom macroblock of the pair of frame macroblocks in a lower portion to construct the single field macroblock if a field attribute of the field macroblock of the current layer is even and arranging odd lines of the top macroblock of the pair of frame macroblocks in an upper portion and odd lines of the bottom macroblock of the pair of frame macroblocks in a lower portion to construct the single field macroblock if the field attribute of the field macroblock of the current layer is odd.

6. The method according to claim 4, wherein the step b) includes using the texture information of the constructed single field macroblock as intra base prediction information if both of the pair of frame macroblocks are of intra mode and using the texture information of the constructed single field macroblock as residual prediction information if both of the pair of frame macroblocks are of inter mode.

7. A method for encoding or decoding a video signal, the method comprising:

a) constructing a pair of frame macroblocks from a single field macroblock or a pair of vertically adjacent field macroblocks of a base layer; and

b) using respective texture information of the constructed pair of frame macroblocks as respective texture prediction information of a pair of frame macroblocks of a current layer.

8. The method according to claim 7, wherein the step a) includes alternately selecting lines of top and bottom macroblocks of the pair of field macroblocks sequentially line by line and arranging the selected lines in the selected order to construct the pair of frame macroblocks.

9. The method according to claim 8, wherein the step b) includes using the respective texture information of the constructed pair of frame macroblocks as intra base prediction information if both of the pair of field macroblocks are of intra mode and using the respective texture information of the constructed pair of frame macroblocks as residual prediction information if both of the pair of field macroblocks are of inter mode.

10. The method according to claim 7, wherein the step a) includes interpolating the single field macroblocks in a vertical direction to construct the pair of frame macroblocks.

12. The method according to claim 7, wherein the step a) includes selecting one of the pair of field macroblocks and interpolating the selected field macroblock in a vertical direction to construct the pair of frame macroblocks if the pair of field macroblocks are an intra-mode field macroblock and an inter-mode field macroblock.

14. The method according to claim 7, wherein the pair of vertically adjacent field macroblocks is included in a frame into which an interlaced video signal has been coded in an MBAFF scheme.

11. (canceled)

13. (canceled)

15. (canceled)

16. A method for encoding or decoding a video signal, the method comprising:

a) constructing N pairs of frame macroblocks from a pair of vertically adjacent field macroblocks of a base layer, where the N is an integer greater than 1; and

b) using respective texture information of the constructed N pairs of frame macroblocks as respective texture prediction information of N pairs of frame macroblocks located at different temporal positions in a current layer.

17. The method according to claim 16, wherein the N is 2 and the step a) includes interpolating a top macroblock of the pair of field macroblocks in a vertical direction to construct one of the N pairs of frame macroblocks and interpolating a bottom macroblock of the pair of field macroblocks in a vertical direction to construct another of the N pairs of frame macroblocks.

18-19. -19. (canceled)

20. A method for encoding or decoding a video signal, the method comprising:

a) interpolating each field picture or a frame picture of a lower layer in a vertical direction to extend each field picture or the frame picture in a vertical direction; and

b) using the interpolated field picture or frame pictures in interlayer prediction of a frame of an upper layer.

21-23. -23. (canceled)