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US 11,451,785 B2Granted
Video decoding method using simplified residual data coding in video coding system, and apparatus therefor
AssigneeLG Electronics Inc.
InventorsJungah Choi, Jin Heo, Sunmi Yoo, Jaehyun Lim, Jangwon Choi, Seunghwan Kim
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Abstract
A method for performing video decoding by a decoding device according to the present document comprises the steps of: acquiring residual information of a current block; deriving residual samples of the current block on the basis of the residual information; and generating a reconstructed picture on the basis of the residual samples.
Claims15
An image decoding method, performed by a decoding apparatus, the method comprising:
- obtaining residual information of a current block;
- deriving residual samples of the current block based on the residual information;
- and
- generating a reconstructed picture based on the residual samples,
- wherein the obtaining the residual information comprises:
- obtaining syntax elements for a first transform coefficient to an n-th transform coefficient of the current block;
- and
- obtaining syntax elements for an n+1th transform coefficient to a last transform coefficient of the current block,
- wherein a number of context-coded syntax elements for the first transform coefficient to the n-th transform coefficient is equal to a maximum number of context coded bins of the current block,
- wherein the syntax elements for the first transform coefficient to the n-th transform coefficient are syntax elements according to a first residual data coding structure of Transform Skip Residual Coding (TSRC),
- wherein the syntax elements for the n+1th transform coefficient to the last transform coefficient are syntax elements according to a second residual data coding structure of the TSRC, and
- wherein the syntax elements according to the second residual data coding structure include coefficient level information and a sign flag for a transform coefficient.
9 more elements
An image encoding method, performed by an encoding apparatus, the method comprising:
- deriving residual samples for a current block;
- generating residual information for the residual samples;
- and
- encoding image information including the residual information,
- wherein the generating the residual information comprises:
- deriving transform coefficients for the current block based on the residual samples;
- generating syntax elements for a first transform coefficient to an n-th transform coefficient of the current block;
- and
- generating syntax elements for an n+1th transform coefficient to a last transform coefficient of the current block,
- wherein a number of context-coded syntax elements for the first transform coefficient to the n-th transform coefficient is equal to a maximum number of context coded bins of the current block,
- wherein the syntax elements for the first transform coefficient to the n-th transform coefficient are syntax elements according to a first residual data coding structure of Transform Skip Residual Coding (TSRC),
- wherein the syntax elements for the n+1th transform coefficient to the last transform coefficient are syntax elements according to a second residual data coding structure of the TSRC, and
- wherein the syntax elements according to the second residual data coding structure include coefficient level information and a sign flag for a transform coefficient.
10 more elements
A non-transitory computer-readable storage medium storing a bitstream generated by a method, the method comprising:
- deriving residual samples for a current block;
- generating residual information for the residual samples;
- encoding image information including the residual information;
- and
- generating the bitstream including the image information,
- wherein the generating the residual information comprises:
- deriving transform coefficients for the current block based on the residual samples;
- generating syntax elements for a first transform coefficient to an n-th transform coefficient of the current block;
- and
- generating syntax elements for an n+1th transform coefficient to a last transform coefficient of the current block,
- wherein a number of context-coded syntax elements for the first transform coefficient to the n-th transform coefficient is equal to a maximum number of context coded bins of the current block,
- wherein the syntax elements for the first transform coefficient to the n-th transform coefficient are syntax elements according to a first residual data coding structure of Transform Skip Residual Coding (TSRC),
- wherein the syntax elements for the n+1th transform coefficient to the last transform coefficient are syntax elements according to a second residual data coding structure of the TSRC, and
- wherein the syntax elements according to the second residual data coding structure include coefficient level information and a sign flag for a transform coefficient.
11 more elements
Dependencies are inferred from the claim text.