Inter-Layer Prediction Method for Video Signal

• US 20090220008A1
• Filed: 01/09/2007
• Published: 09/03/2009
• 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 8,494,060 B2
• Time in Patent Office: Days
• US Class Current: 375/240.240
• 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 vertically-adjacent two field macro blocks of a base layer, selectively applies a de-blocking filter to the constructed pair of frame macro blocks, and uses texture information of the pair of frame macro blocks in interlayer texture prediction 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 frame macroblocks from a pair of vertically adjacent field macroblocks;

b) selectively applying a de-blocking filter to the constructed pair of frame macroblocks; and

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

2. The method according to claim 1, 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.

3. The method according to claim 2, wherein, when both of the pair of field macroblocks are of intra mode, a de-blocking filter is applied to the constructed pair of frame macroblocks and respective texture information of the pair of macroblocks to which the de-blocking filter has been applied is used as intra base prediction information.

4. The method according to claim 1, 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.

5. The method according to claim 4, wherein, if the selected field macroblock is of intra mode, a de-blocking filter is applied to the constructed pair of frame macroblocks and respective texture information of the de-blocked pair of frame macroblocks is used as intra base prediction information.

6. 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.

7. The method according to claim 1, wherein the texture information of the pair of macroblocks used as the texture prediction information is image sample data or residual data that is a difference value between image sample data.

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

interpolating the deblocking-filtered pair of frame macroblocks in a vertical and/or horizontal direction; and

obtaining a reference image by using the interpolated pair of frame macroblocks,

wherein the respective texture prediction information of the pair of frame macroblocks of a current layer is obtained from texture information of the reference image.