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US 8,509,304 B2Granted
Video encoding method and apparatus, and video decoding method and apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorsYun-gu Lee, Byung-cheol Song
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Abstract
A video encoding method and apparatus, and a video decoding method and apparatus, which are capable of improving efficiency of encoding a luminance component video signal by predicting information on various encoding modes of the luminance component video signal by using a result obtained by encoding a chrominance component video signal, are provided. Accordingly, a block mode and an intra-prediction mode of the luminance component video signal are predicted from a previously encoded and recovered chrominance component video signal, and the predicted block mode and the predicted intra-prediction mode are used to encode the luminance component video signal.
Claims19
A video encoding method comprising:
- encoding a first video component block of a predetermined size from a current video signal comprising at least two video components and recovering the encoded first video component block;
- predicting an encoding mode of a second video component block corresponding to the first video component block from the firstly encoded and recovered first video component block by using a correlation between the first video component block and the second video component block;
- and
- encoding the second video component block according to the predicted encoding mode,
- wherein the encoding mode of the second video component includes at least one of a block mode for representing a divided form of the second video component block and an intra-prediction mode of the second video component block,
- wherein the predicting comprises determining a block mode of the first video component block by determining a final divided form of the first video component block by dividing the first video component block into sub-blocks by using a complexity of the recovered first video component block, and repeatedly dividing the sub-blocks into sub-blocks of smaller size according to a complexity of the sub-blocks and dividing the second video component block according to the same block mode as the determined block mode of the first video component, and
- wherein in the determining of the block mode of the first video component block, in a case where a size of an edge component included in the first video component block is greater than a predetermined first threshold, the first video component block is divided into sub-blocks of smaller size, and a final divided form of the first video component block is determined by repeatedly dividing sub-blocks having an edge component greater than a second threshold into sub-blocks of smaller size.
4 more elements
A video encoding apparatus comprising:
- an encoding mode prediction unit comprising a circuit for predicting an encoding mode of a second video component block corresponding to a first video component block from the first video component of a predetermined size which is firstly encoded and recovered in a current video signal comprising at least two video components by using a correlation between the first video component block and the second video component block;
- and
- an encoding unit comprising a circuit for encoding the second video component block according to the predicted encoding mode,
- wherein the encoding mode of the second video component includes at least one of a block mode for representing a divided form of the second video component block and an intra-prediction mode of the second video component block, and
- wherein the encoding mode prediction unit determines a block mode of the first video component block by determining a final divided form of the first video component block by dividing the first video component block into sub-blocks by using a complexity of the recovered video component block and repeatedly dividing the sub-blocks into sub-blocks of smaller size according to a complexity of the sub-blocks and predicts the same block mode as the determined block mode of the first video component as a block mode of the second video component block.
2 more elements
A video decoding method comprising:
- decoding a first video component block of a predetermined size from a current video signal comprising at least two video components;
- predicting a decoding mode of a second video component block corresponding to the first video component block from the firstly decoded first video component block by using a correlation between the first video component block and the second video component block;
- and
- decoding the second video component block according to the predicted decoding mode,
- wherein the decoding mode of the second video component includes at least one of a block mode for representing a divided form of the second video component block and an intra-prediction mode of the second video component block, and
- wherein the predicting comprises determining a block mode of the first video component block by determining a final divided form of the first video component block by dividing the first video component block into sub-blocks by using a complexity of the decoded first video component block and repeatedly dividing the sub-blocks into sub-blocks of smaller size according to a complexity of the sub-blocks, and dividing the second video component block according to the same block mode as the determined block mode of the first video component.
3 more elements
A video decoding apparatus comprising:
- a decoding mode prediction unit comprising a circuit for predicting a decoding mode of a second video component block corresponding to a first video component block from the first video component of predetermined size which is firstly decoded in a current video signal comprising at least two video components by using a correlation between the first video component block and the second video component block;
- and
- a decoding unit comprising a circuit for decoding the second video component block according to the predicted decoding mode,
- wherein the decoding mode of the second video component includes at least one of a block mode for representing a divided form of the second video component block and an intra-prediction mode of the second video component block, and
- wherein the decoding mode prediction unit determines a block mode of the first video component block by determining a final divided form of the first video component block by dividing the first video component block into sub-blocks by using a complexity of the decoded first video component block and repeatedly dividing the sub-blocks into sub-blocks of smaller size according to a complexity of the sub-blocks and divides the second video component block according to the same block mode as the determined block mode of the first video component.
2 more elements
Dependencies are inferred from the claim text.