Patent ID: 11949914
Assignee: SHARP KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. A method for decoding image data, the method including:
decoding a transform skip residual coding disabled flag, specifying a residual coding is used to parse residual samples of a transform skip block for a current slice or a residual transform skip coding is used to parse residual samples of a transform skip block for a current slice, based on a value of a transform skip enabled flag specifying whether a transform skip flag may be present in a transform unit syntax;
decoding the transform skip flag, specifying whether a transform is applied to an associated block or not, based on (i) the value of the transform skip enabled flag, (ii) a value of a bdpcm flag, and (iii) a transform block size; and
deriving a transform coefficient by using a scaling factor,
wherein:
in a case that a value of the transform skip flag is equal to zero or a value of the transform skip residual coding disabled flag is equal to one, the residual coding is used,
otherwise, the residual transform skip coding is used, and
the scaling factor is derived by switching between multiple derivation methods based on the value of the transform skip flag.