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Registered IMAGE ENCODING/DECODING METHOD AND DEVICE USING SECONDARY TRANSFORM, AND RECORDING MEDIUM STORING BITSTREAM

Inventors
Sung-Chang Lim, Kang Jung Won, Lee Hahyun, Jinho Lee, Kim Hui Yong, Choi Jin Soo
Application No.
17616581 (2020.06.18)
Publication No.
20220264151 (2022.08.18)
Registration No.
12022119 (2024.06.25)
Country
UNITED STATES
Project Code
19HR2300, Development and Standardization of 5th Generation Video/Audio Coding Technology for Ultra Gifh Quality Media Services, Kang Jung Won
Abstract
Disclosed herein is a video decoding method including: obtaining a transform skip mode flag indicating whether or not a transform skip mode is applied to a current block; based on the transform skip mode flag, when a transform skip mode is applied to the current block, determining that secondary transform/inverse transform is not applied to the current block; and, according to the transform skip mode flag, when a transform skip mode is not applied to the current block, obtaining a transform matrix index for secondary transform/inverse transform of the current block and, according to the transform matrix index, determining whether or not secondary transform/inverse transform is applied to the current block.
KSP Keywords
Image Encoding, Recording medium, Skip mode, Transform skip mode, decoding method, inverse transform, transform matrix, transform skip, video decoding