IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS
First Claim
1. A decoding device, comprisingat least one processor;
- andstorage coupled to the at least one processor;
wherein the at least one processor is configured to;
receive a bitstream from a server based on an instruction sent from an apparatus;
decode an image, on a block-by-block basis, from the bitstream; and
send the image to a display apparatus coupled to the decoding device,wherein the decoding further includes;
obtaining, in a following order, first data including four coded luma context-dependent segments, second data including four coded luma context-independent segments, third data including one coded chroma context-dependent segment and fourth data including one coded chroma context-independent segment from the bitstream for an image block in the image;
performing context adaptive binary arithmetic decoding on the first data to generate four luma context-dependent segments;
performing bypass decoding on the second data to generate four luma context-independent segments;
performing context adaptive binary arithmetic decoding on the third data to generate one chroma context-dependent segment;
performing bypass decoding on the fourth data to generate one chroma context-independent segment;
deriving four luma intra prediction modes from a respective one of the four luma context-dependent segments and a corresponding one of the four luma context-independent segments for four subblocks in the image block; and
deriving one chroma intra prediction mode from the one chroma context-dependent segment and the one chroma context-independent segment for the image block.
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Accused Products
Abstract
An image decoding device includes a processor and storage configured to receive a bitstream from a server based on an instruction sent from an apparatus, decode an image on a block-by-block basis, from the bitstream and send the image to a display apparatus. The decoding includes obtaining first, second, third and fourth data, where context adaptive binary arithmetic decoding is performed on the first data, bypass decoding is performed on the second data, context adaptive binary arithmetic decoding is performed on the third data, and bypass decoding is separately performed on the fourth data. Four luma intra prediction modes are derived from a respective one of four luma context-dependent segments and a corresponding one of four luma context-independent segments for four subblocks in an image block, and one chroma intra prediction mode is derived from one chroma context-dependent segment and one chroma context-independent segment for the image block.
1 Citation
6 Claims
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1. A decoding device, comprising
at least one processor; - and
storage coupled to the at least one processor; wherein the at least one processor is configured to; receive a bitstream from a server based on an instruction sent from an apparatus; decode an image, on a block-by-block basis, from the bitstream; and send the image to a display apparatus coupled to the decoding device, wherein the decoding further includes; obtaining, in a following order, first data including four coded luma context-dependent segments, second data including four coded luma context-independent segments, third data including one coded chroma context-dependent segment and fourth data including one coded chroma context-independent segment from the bitstream for an image block in the image; performing context adaptive binary arithmetic decoding on the first data to generate four luma context-dependent segments; performing bypass decoding on the second data to generate four luma context-independent segments; performing context adaptive binary arithmetic decoding on the third data to generate one chroma context-dependent segment; performing bypass decoding on the fourth data to generate one chroma context-independent segment; deriving four luma intra prediction modes from a respective one of the four luma context-dependent segments and a corresponding one of the four luma context-independent segments for four subblocks in the image block; and deriving one chroma intra prediction mode from the one chroma context-dependent segment and the one chroma context-independent segment for the image block. - View Dependent Claims (2, 3)
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4. A decoding device, comprising
at least one processor; - and
storage coupled to the at least one processor; wherein the at least one processor is configured to; receive a bitstream transmitted from an apparatus; decode an image, on a block-by-block basis, from the bitstream; and send the image to a display apparatus coupled to the decoding device, wherein the decoding further includes; obtaining, in a following order, first data including four coded luma context-dependent segments, second data including four coded luma context-independent segments, third data including one coded chroma context-dependent segment and fourth data including one coded chroma context-independent segment from the bitstream for an image block in the image; performing context adaptive binary arithmetic decoding on the first data to generate four luma context-dependent segments; performing bypass decoding on the second data to generate four luma context-independent segments; performing context adaptive binary arithmetic decoding on the third data to generate one chroma context-dependent segment; performing bypass decoding on the fourth data to generate one chroma context-independent segment; deriving four luma intra prediction mode respectively from one of the four luma context-dependent segments and a corresponding one of the four luma context-independent segments for four subblocks in the image block; deriving one chroma intra prediction mode from the one chroma context-dependent segment and the one chroma context-independent segment for the image block. - View Dependent Claims (5, 6)
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Specification