Video coding method on basis of secondary transform, and device for same

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United States of America

PATENT NO 11968397
APP PUB NO 20230156225A1
SERIAL NO

18099131

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Abstract

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A video decoding method according to the present document is characterized by comprising: a step for deriving transform coefficients through inverse quantization on the basis of quantized transform coefficients for a target block; a step for deriving modified transform coefficients on the basis of an inverse reduced secondary transform (RST) of the transform coefficients; and a step for generating a reconstructed picture on the basis of residual samples for the target block on the basis of an inverse primary transform of the modified transform coefficients, wherein the inverse RST using a transform kernel matrix is performed on transform coefficients of the upper-left 4×4 region of an 8×8 region of the target block, and the modified transform coefficients of the upper-left 4×4 region, upper-right 4×4 region, and lower-left 4×4 region of the 8×8 region are derived through the inverse RST.

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Patent Owner(s)

  • LG ELECTRONICS INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kim, Seunghwan Seoul, KR 698 1842
Koo, Moonmo Seoul, KR 256 721
Lim, Jaehyun Seoul, KR 572 4032

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