Decoding device, program, and decoding method

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United States of America Patent

PATENT NO 11936885
APP PUB NO 20230269383A1
SERIAL NO

18310191

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method includes: decoding a bitstream and thereby outputting a transform coefficients for each color component of the block, a first flag indicating for each color component whether the block includes a non-zero transform coefficient, and a second flag indicating whether the block has been encoded using a color space transform that transforming a color space of a prediction residual from a color space of the original image to another color space; performing a color space inverse transform for the prediction residual restored from the transform coefficients, when the second flag indicates that the block has been encoded using the color space transform; and determining whether to perform chroma residual scaling for the prediction residual of the chrominance component, based on the first flag of a chrominance component and the second flag, the chroma residual scaling that performs scaling based on a luminance component corresponding to the chrominance component.

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Patent Owner(s)

  • HITACHI LTD. & NIPPON HOSO KYOKAI

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ichigaya, Atsuro Tokyo, JP 64 68
Iwamura, Shunsuke Tokyo, JP 60 45
Nemoto, Shimpei Tokyo, JP 48 27

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