Image encoding/decoding method and apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorByung-cheol Song
Life of this patent
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Abstract
An image encoding/decoding method and apparatus, in which at least one of a plurality of color component images except a first color component image is predicted from motion estimation information or a reconstructed color component image of the first color component images using correlation among the plurality of color component images. The image encoding method includes performing predictive-encoding on the first color component image among the plurality of color component images forming a single image using a general encoding method, and performing motion estimation and compensation on the at least one of the other color component images or predicting the at least one of the other color component images using a reconstructed first color component image.
Claims52
An image encoding method comprising operations of:
- performing predictive-encoding on a first color component pixel block of a first color component image of an input image;
- performing motion estimation on at least one of other color component pixel blocks corresponding to the first color component pixel block in order to generate a first prediction pixel block candidate for the at least one of the other color component pixel block(s);
- reconstructing the predictive-encoded first color component pixel block;
- predicting the at least one of the other color component pixel blocks using the reconstructed first color component pixel block in order to generate a second prediction pixel block candidate for the at least one of the other color component pixel blocks;
- and
- determining one of the first prediction pixel block candidate and the second prediction pixel block candidate to be a prediction pixel block of the at least one of the other color component pixel blocks.
An image encoder comprising:
- a first prediction pixel block candidate generation unit which performs motion estimation on at least one of other color component pixel blocks corresponding to a first color component pixel block of a previously predictive-encoded first color component image of an input image in order to generate a first prediction pixel block candidate;
- a reconstruction unit which reconstructs the predictive-encoded first color component pixel block;
- a second prediction pixel block candidate generation unit which predicts the at least one of the other color component pixel blocks using the reconstructed first color component pixel block in order to generate a second prediction pixel block candidate for the at least one of the other color component pixel blocks;
- and
- a determination unit which determines one of the first prediction pixel block candidate and the second prediction pixel block candidate to be a prediction pixel block of the at least one of the other color component pixel blocks,
- wherein the first prediction pixel block candidate generation unit is implemented as hardware.
An image decoding method comprising:
- decoding a first color component pixel block of a first color component image included in an input bitstream;
- generating a prediction pixel block of at least one of the other color component pixel blocks by performing at least one of motion compensation on the at least one of the other color component pixel blocks corresponding to the first color component pixel block, and prediction using the decoded first color component pixel block according to prediction mode information included in the bitstream;
- and
- decoding the at least one of the other color component pixel blocks using the generated prediction pixel block of the at least one of the other color component pixel blocks.
An image decoder comprising:
- a first decoding unit which decodes a first color component pixel block of a first color component image included in an input bitstream;
- a prediction pixel block generation unit which generates a prediction pixel block of at least one of other color component pixel blocks, by performing at least one of motion compensation on the at least one of the other color component pixel blocks corresponding to the first color component pixel block, and prediction using the decoded first color component pixel block according to prediction mode information included in the bitstream;
- and
- a second decoding unit which decodes the at least one of the other color component pixel blocks using the generated prediction pixel block of the at least one of the other color component pixel blocks,
- wherein the prediction pixel block generation unit is implemented as hardware.
Dependencies are inferred from the claim text.