Inter-layer prediction method for video signal

• US 8,345,755 B2
• Filed: 01/09/2007
• Issued: 01/01/2013
• 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): Shiferaw, Eleni
• Assistant Examiner(s): Branske, Hilary
• Application Number:
  US12/087,515
• Publication Number:
  US 20090168875A1
• Time in Patent Office: 2,184 Days
• Field of Search: 375/240.12, 375/240.13, 375/240.14, 375/240.15, 375/240.16, 375/240.17
• US Class Current: 375/240.12
• 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 using interlaced video signal of a base layer in interlayer texture prediction. The present method constructs a pair of frame macro blocks from vertically-adjacent two field macro blocks pertaining to interlaced video signal of a base layer, separates video signal containing the pair of frame macro blocks into even-field and odd-field components, interpolates the even-field and the odd-field components respectively in vertical and/or horizontal direction, and constructs a combined video data by interleaving the interpolated even-field and odd-field components.

Claims

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

decoding, by a decoder, a field macroblock pair in a base layer, the field macroblock pair being two vertically adjacent field macroblocks in a MacroBlock Adaptive Frame Field frame (MBAFF frame), the MBAFF frame being a frame including macroblocks adaptively decoded as frame macroblock or field macroblock;

constructing, by the decoder, a frame macroblock pair from the field macroblock pair;

separating, by the decoder, the frame macroblock pair into even field components and odd field components;

interpolating, by the decoder, the even field components and odd field components in a vertical and/or horizontal direction;

interleaving, by the decoder, the interpolated even field components and odd field components;

obtaining, by the decoder, a reference image by using the interleaved even field components and odd field components; and

obtaining, by the decoder, texture prediction information of a current block in an enhanced layer by using the reference image.

2. The method according to claim 1, wherein the frame macroblock pair is constructed by alternately selecting lines of top and bottom macroblocks of the field macroblock pair sequentially line by line and arranging the selected lines in the selected order.

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

decoding the current block in the enhanced layer by using the texture prediction information.

4. The method according to claim 1, wherein the method includes selecting one field macroblock of the field macroblock pair and interpolating the selected field macroblock in a vertical direction to construct the frame macroblock pair if the field macroblock pair are composed of an intra-mode field macroblock and an inter-mode field macroblock.

5. The method according to claim 1, wherein the field macroblock pair are coded in an intra mode.

6. The method according to claim 3, wherein the current block in the enhanced layer is included in a MacroBlock Adaptive Frame Field frame (MBAFF frame) of the enhanced layer.