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Primary transforms for cross-component level reconstruction

專利號(hào)
US11930177B2
公開日期
2024-03-12
申請(qǐng)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(shuō)明書

TABLE 4 Reconstruction of chroma residuals. The value CSign is a sign value (+1 or ?1), which is specified in the slice header, resJointC[ ][ ] is the transmitted residual. tu_cbf_cb tu_cbf_cr reconstruction of Cb and Cr residuals mode 1 0 resCb[ x ][ y ] = resJointC[ x ][ y ] 1 resCr[ x ][ y ] = ( CSign * resJointC[ x ][ y ] ) >> 1 1 1 resCb[ x ][ y ] = resJointC[ x ][ y ] 2 resCr[ x ][ y ] = CSign * resJointC[ x ] [ y ] 0 1 resCb[ x ][ y ] = ( CSign * 3 resJointC[ x ][ y ] ) >> 1 resCr[ x ][ y ] = resJointC[ x ][ y ]

權(quán)利要求

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