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Transform selection in video encoder and/or video decoder

An inverse transform, video sequence technology, applied in the field of video encoding and/or decoding, which can solve problems such as inability to decorrelate residual signals

Active Publication Date: 2022-04-29
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] BMS tools improve the adaptability of the transformation process, since DCT / DST-based transformations cannot fully decorrelate the residual signal, especially when there is strong directional information

Method used

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  • Transform selection in video encoder and/or video decoder
  • Transform selection in video encoder and/or video decoder
  • Transform selection in video encoder and/or video decoder

Examples

Experimental program
Comparison scheme
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Embodiment

[0094] 1. A method for encoding a video sequence comprising a plurality of pictures, the method comprising: determining (s402) a directional pattern in a prediction block of one of the pictures in the video sequence, wherein the determining comprises determining a directional pattern using information from a reference block from which the prediction block is generated; selecting (s404) a transform set (e.g., an NSST transform set) for the prediction block based on the determined directional pattern; and Using (s406) the transform set selected for the predictive block based on the determined directional pattern, the transform data derived from the predictive block (for example, the residual block derived from the predictive block and the original block, or as the residual block The transform coefficients generated by the results) are transformed.

[0095] 2. A method for decoding a video sequence comprising a plurality of pictures, the method comprising: determining (s502) a di...

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Abstract

A process of selecting a transform set for a predicted block. This process can be used in both encoders and decoders. For example, this process can be used in both an encoder and a decoder for a prediction block predicted from a reference block. In some embodiments, both the prediction block and the reference block are intra blocks.

Description

technical field [0001] This disclosure relates to video encoding and / or decoding. Background technique [0002] The present disclosure relates to the encoding and / or decoding of a video sequence consisting of a sequence of pictures. [0003] weight [0004] Each picture of a video sequence consists of one or more components. Each component can be described as a two-dimensional rectangular array of sample values. A picture in a video sequence usually consists of three components: i) a luma component (Y), where the sample values ​​are luma values; ii) a first chrominance component (Cb), where the sample values ​​are chrominance values; and iii ) second chroma component (Cr), where the sample value is a chroma value. [0005] Other examples include Y’Cb Cr, YUV and IC T C P . in IC T C P where I is the "intensity luma" component. For the remainder of this document, we may refer to any luminance component Y', Y, or I as Y or simply luminance. Typically, the size of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/12H04N19/159H04N19/186H04N19/176H04N19/61
CPCH04N19/12H04N19/159H04N19/186H04N19/176H04N19/61H04N19/11H04N19/45
Inventor 余若洋张智理卡尔德·肖伯格
Owner TELEFON AB LM ERICSSON (PUBL)