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Primary transforms for cross-component level reconstruction

專利號
US11930177B2
公開日期
2024-03-12
申請人
Tencent America LLC（US CA Palo Alto）
發(fā)明人
Madhu Peringassery Krishnan; Xin Zhao; Shan Liu
IPC分類
H04N19/12; H04N19/176; H04N19/18; H04N19/186; H04N19/46
技術(shù)領(lǐng)域
transform,coding,video,prediction,block,coded,in,may,picture,be
地域： CA CA Palo Alto

摘要

This disclosure relates generally to video coding and particularly to cross component level reconstruction. For example, a method is disclosed for processing video data which may include extracting a first transform block of a first color component and a second transform block of a second color component from a bitstream of a video block; determining that transform coefficients in the first transform block are all zero; determining that a CCLR is applied to the first transform block; refining one or more of the transform coefficients in the first transform block, to obtain a refined first transform block; determining a target transform kernel for the refined first transform block; performing a reverse transform on the refined first transform block based on the target transform kernel to obtain a target block; and reconstructing the first color component of the video block based on at least the target block.

說明書

According to some example embodiments, the video encoder (603) may code and compress the pictures of the source video sequence into a coded video sequence (643) in real time or under any other time constraints as required by the application. Enforcing appropriate coding speed constitutes one function of a controller (650). In some embodiments, the controller (650) may be functionally coupled to and control other functional units as described below. The coupling is not depicted for simplicity. Parameters set by the controller (650) can include rate control related parameters (picture skip, quantizer, lambda value of rate-distortion optimization techniques, . . . ), picture size, group of pictures (GOP) layout, maximum motion vector search range, and the like. The controller (650) can be configured to have other suitable functions that pertain to the video encoder (603) optimized for a certain system design.

權(quán)利要求

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