US 7,924,917 B2Granted

Method for encoding and decoding video signals

AssigneeLG Electronics Inc.

InventorsSeung Wook Park, Ji Ho Park, Byeong Moon Jeon

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Abstract

A method for encoding video signals by inverse motion compensated temporal filtering where video frames of a base layer are used to encode video frames of an enhanced layer into predicted images. For each image block in an arbitrary frame in an enhanced layer frame sequence, an area including a block, which is present in a base layer frame temporally coincident with the arbitrary frame and is at the same position as the image block, is enlarged according to the ratio between screen sizes of the two layers. A reference block most highly correlated with the image block is searched for in the enlarged area in the temporally coincident base layer frame through motion estimation and is used to obtain pixel difference values and a motion vector of the image block for encoding the image block into a predicted image, thereby improving coding efficiency.

Claims12

Dependent claims

A method of decoding a video signal by a video decoding apparatus, comprising:

first obtaining, with the video decoding apparatus including a processor, a pixel value of a corresponding block in a base layer, the corresponding block being referred by a current block in an enhanced layer, the first obtaining including obtaining a pixel value of a padding area by using a pixel value of a neighboring block in the base layer when an inter macroblock of the base layer covers the corresponding block of the base layer, the padding area being an area of the corresponding block covered by the inter macroblock of the base layer, the neighboring block being a block adjacent to the padding area;
upsampling, with the video decoding apparatus, the pixel value of the corresponding block in the base layer;
second obtaining, with the video decoding apparatus, a predicted pixel value of a target block in an enhanced layer by using the upsampled pixel value of the corresponding block;
and
reconstructing, with the video decoding apparatus, the target block by using the predicted pixel value of the target block and a residual of the target block,
the residual of the target block being a difference value between the predicted pixel value of the target block and a pixel value of the target block.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/257,148Filed 25 Oct 2005 · us provisional application
Priority: KR 10-2005-001484323 Feb 2005
Published: US 2006/0093036 A14 May 2006
Granted: 12 Apr 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04N 19/615
In combination with predictive coding: using motion compensated temporal filtering [MCTF]
H04N 19/31
Using hierarchical techniques, e.g. scalability: in the temporal domain
H04N 19/33
Using hierarchical techniques, e.g. scalability: in the spatial domain
H04N 19/61
Using transform coding: in combination with predictive coding