Inter-Layer Prediction Method for Video Signal

• US 20090180537A1
• Filed: 01/09/2007
• Published: 07/16/2009
• 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 8,792,554 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 prediction in encoding or decoding of video signal . The present method checks whether at least one of vertically-adjacent two macro blocks on a base layer is intra mode, and if only one of the two macro blocks is identified to intra mode, motion information of an inter-mode macro block of the two macro blocks is copied to the other intra-mode macro block in order to set the intra-mode macro block to a macro block having motion information. In addition, if the two macro blocks are intra mode and contain field components respectively, two frame macro blocks are constructed from the two field macro blocks.

Claims

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

confirming whether or not at least one of two vertically adjacent macroblocks of a base layer is of intra mode;

copying, if it is confirmed that only one of the two macroblocks is of intra mode, motion information of an inter-mode macroblock included in the two macroblocks to the intra-mode macroblock to set the intra-mode macroblock to a block having motion information; and

constructing a pair of frame macroblocks from the two macroblocks if the two macroblocks are all intra-mode field macroblocks.

2. The method according to claim 1, wherein the copied motion information is information about a motion vector and a reference index.

3. The method according to claim 1, further comprising:

determining partition modes of the two macroblocks using motion information of the two macroblocks after the step of setting the intra-mode macroblock to the block having motion information.

4. The method according to claim 1, wherein the two macroblocks are macroblocks of a frame component image.

5. The method according to claim 4, wherein the motion information of the two macroblocks is used in interlayer motion prediction of a pair of macroblocks of a field component image of an upper layer of the base layer.

6. The method according to claim 1, wherein respective texture information of the constructed pair of frame macroblocks is used as respective texture prediction information of a pair of frame macroblocks of a current layer.

7. The method according to claim 6, wherein respective texture information of the constructed pair of frame macroblocks is used as intra base prediction information of a pair of frame macroblocks of the current layer.

8. The method according to claim 6, wherein the texture information of the constructed pair of macroblocks used as the texture prediction information is image data that has been decoded.

9. The method according to claim 1, wherein the step of constructing the pair of frame macroblocks 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.

10. The method according to claim 1, 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.