Inter-layer prediction method for video signal

• US 8,494,060 B2
• Filed: 01/09/2007
• Issued: 07/23/2013
• Est. Priority Date: 01/09/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Seung Wook, Jeon, Byeong Moon, Park, Ji Ho
• Primary Examiner(s): Flynn, Nathan
• Assistant Examiner(s): Su, Sarah
• Application Number:
  US12/087,488
• Publication Number:
  US 20090220008A1
• Time in Patent Office: 2,387 Days
• Field of Search: 375/240.12, 375/240.13, 375/240.23, 375/240.24, 382/232, 382/236, 382/238
• US Class Current: 375/240.24
• 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 decoding a video signal, the method comprising:

deriving, by a decoding unit, position information of a base layer macroblock in a base layer based on a position information of a virtual macroblock in a virtual base layer, the virtual macroblock corresponding to a current macroblock in an enhanced layer;

obtaining, by the decoding unit, texture prediction information of the current macroblock in the enhanced layer when a block type of the base layer macroblock corresponding to the position information of the base layer macroblock is an intra-coded macroblock type,

wherein the obtaining the texture prediction information comprises;

constructing a field macroblock pair from a frame macroblock pair in the base layer, the base layer macroblock being in the frame macroblock pair;

deblocking-filtering, by the decoding unit, the field macroblock pair, the field macroblock pair including a set of even lines and a set of odd lines, the set of even lines and the set of odd lines being deblocking-filtered, respectively;

separating the deblocking-filtered field macroblock pair into an even field component including the set of deblocking-filtered even lines and an odd field component including the set of deblocking-filtered odd lines;

interpolating, by the decoding unit, the even field component and the odd field component in vertical and horizontal directions, wherein the even field component and the odd field component are interpolated, respectively;

predicting, by the decoding unit, the texture information of the current macroblock pair in the enhanced layer by using texture information of the interpolated even field component and odd field component; and

decoding, by the decoding unit, the current macroblock pair in the enhanced layer by using the predicted texture information.

2. The method according to claim 1, wherein the frame macroblock pair in the base layer is coded in intra mode.

3. The method according to claim 1, wherein the frame macroblock pair of the base layer is included in MacroBlock Adaptive Frame Field frame (MBAFF frame), the MacroBlock Adaptive Frame Field frame being a frame adaptively coded as a frame macroblock or a field macroblock.

4. The method according to claim 1, wherein the texture information is image sample data or residual data that is a difference value between image sample data.

5. An apparatus for decoding a video signal, the apparatus comprising a decoder for:

deriving position information of a base layer macroblock in a base layer based on position information of a virtual macroblock in a virtual base layer, the virtual macroblock corresponding to a current macroblock in an enhanced layer;

obtaining texture prediction information of the current macroblock in the enhanced layer when a block type of the base layer macroblock corresponding to the position information of the base layer macroblock is an intra-coded macroblock type,

wherein the obtaining the texture prediction information comprises;

constructing a field macroblock pair from a frame macroblock pair in the base layer, the base layer macroblock being in the frame macroblock pair;

deblocking-filtering, by a decoding unit, the field macroblock pair, the field macroblock pair including a set of even lines and a set of odd lines, the set of even lines and the set of odd lines being deblocking-filtered, respectively;

separating the deblocking-filtered field macroblock pair into an even field component including the set of deblocking-filtered even lines and an odd field component including the set of deblocking-filtered odd lines;

interpolating, by the decoding unit, the even field component and the odd field component in vertical and horizontal directions, wherein the even field component and the odd field component are interpolated, respectively;

predicting, by the decoding unit, the texture information of the current macroblock pair in the enhanced layer by using texture information of the interpolated even field component and odd field component; and

decoding, by the decoding unit, the current macroblock pair in the enhanced layer by using the predicted texture information.