Adaptive Implicit Transform Setting
First Claim
1. An encoding method comprising:
- receiving a block of pixels of a video picture to be coded as a current block;
performing an intra prediction operation for the current block according to an intra prediction setting and generating prediction residuals of the current block, the intra prediction setting selecting a current intra prediction mode from a plurality of intra prediction modes for the current block;
mapping the current intra prediction mode to a target transform mode; and
encoding the current block in a bitstream by performing a transform operation on the prediction residuals of the current block according to the target transform mode.
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Accused Products
Abstract
A video coder that implicitly signals or decides transform settings based on intra prediction settings is provided. The video coder receives input data associated with a current block. The video coder determines a current intra prediction mode for the current block and maps the current intra prediction mode to a target transform mode. In one example, the video coder encodes the current block by performing a transform operation according to the target transform mode on the prediction residuals of the current block generated according to the current intra prediction mode. In another example, the video coder decodes the current block by performing an inverse transform operation according to the target transform mode on the coded prediction residuals of the current block, in which the coded prediction residuals is derived from the bitstream and is generated according to the current intra prediction mode.
6 Citations
20 Claims
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1. An encoding method comprising:
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receiving a block of pixels of a video picture to be coded as a current block; performing an intra prediction operation for the current block according to an intra prediction setting and generating prediction residuals of the current block, the intra prediction setting selecting a current intra prediction mode from a plurality of intra prediction modes for the current block; mapping the current intra prediction mode to a target transform mode; and encoding the current block in a bitstream by performing a transform operation on the prediction residuals of the current block according to the target transform mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electronic apparatus comprising:
an encoder circuit capable of; receiving a block of pixels of a video picture to be coded as a current block; performing an intra prediction operation for the current block according to an intra prediction setting and generating prediction residuals of the current block, the intra prediction setting selecting a current intra prediction mode from a plurality of intra prediction modes for the current block; mapping the current intra prediction mode to a target transform mode; and encoding the current block in a bitstream by performing a transform operation on the prediction residuals of the current block according to the target transform mode.
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11. A decoding method, comprising:
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receiving a bitstream comprising coded prediction residuals of a current block of a video picture; determining a current intra prediction mode from a plurality of intra prediction modes for the current block according to an intra prediction setting; mapping the current intra prediction mode to a target transform mode; and decoding the current block by performing an inverse transform operation on the coded prediction residuals of the current block according to the target transform mode to generate prediction residuals of the current block and by reconstructing the current block based on the prediction residuals and a set of prediction pixels of the current block generated by performing an intra prediction operation for the current block according to the current intra prediction mode. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. An electronic apparatus comprising:
a decoder circuit capable of; receiving a bitstream comprising coded prediction residuals of a current block of a video picture; determining a current intra prediction mode from a plurality of intra prediction modes for the current block according to an intra prediction setting; mapping the current intra prediction mode to a target transform mode; and decoding the current block by performing an inverse transform operation on the coded prediction residuals of the current block according to the target transform mode to generate prediction residuals of the current block and by reconstructing the current block based on the prediction residuals and a set of prediction pixels of the current block generated by performing an intra prediction operation for the current block according to the current intra prediction mode.
Specification