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US 8,619,872 B2Granted
Inter-layer prediction method for video signal
AssigneeLG Electronics Inc.
InventorsSeung Wook Park, Byeong Moon Jeon, Ji Ho Park
Life of this patent
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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 prediction of a pair of frame macro blocks of a current layer.
Claims13
A method for decoding an image signal, comprising:
- deriving virtual position information of a virtual reference macroblock pair, by a video coding apparatus;
- deriving position information of a reference macroblock pair based on the virtual position information of the virtual reference macroblock pair, by the video coding apparatus, the reference macroblock pair being included in a Macroblock Adaptive Frame Field frame (MBAFF frame) of a base layer;
- obtaining motion information of the reference macroblock pair according to the position information of the reference macroblock pair, wherein if one macroblock in the reference macroblock pair is an intra coded macroblock and the other macroblock in the reference macroblock pair is an inter coded macroblock, motion information of the intra-coded macroblock is set using motion information of the inter-coded macroblock;
- predicting motion information of a target macroblock pair from the motion information of the reference macroblock pair, by the video coding apparatus, the target macroblock pair being included in a Macroblock Adaptive Frame Field frame (MBAFF frame) of an enhanced layer;
- and
- decoding the target macroblock pair using the motion information of the target macroblock pair, by the video coding apparatus,
- wherein the Macroblock Adaptive Frame Field frame is a frame adaptively decoded as a frame macroblock and a field macroblock,
- wherein the enhanced layer differs from the base layer in an aspect ratio or a spatial resolution.
5 more elements
An apparatus for decoding an image signal, comprising:
- a decoding unit configured to derive virtual position information of a virtual reference macroblock pair, and derive position information of a reference macroblock pair based on the virtual position information of the virtual reference macroblock pair 4×4, the reference macroblock pair being included in a Macroblock Adaptive Frame Field frame (MBAFF frame) of a base layer,
- the decoding unit further configured to obtain motion information of the reference macroblock according to the position information of the reference macroblock pair, wherein if one macroblock in the reference macroblock pair is an intra coded macroblock and the other macroblock in the reference macroblock pair is an inter coded macroblock, motion information of the intra-coded macroblock is set using motion information of the inter-coded macroblock, and
- the decoding unit further configured to predict motion information of a target macroblock pair from the motion information of the reference macroblock pair according to the position information of the reference macroblock pair, the target macroblock pair being included in a Macroblock Adaptive Frame Field frame (MBAFF frame) of an enhanced layer,
- the decoding unit further configured to decode the target macroblock pair by using the motion information of the target macroblock pair,
- wherein the Macroblock Adaptive Frame Field frame is a frame adaptively decoded as a frame macroblock and a field macroblock,
- wherein the enhanced layer differs from the base layer in an aspect ratio or a spatial resolution.
3 more elements
Dependencies are inferred from the claim text.