Patent ID: 11962762
Assignee: KT CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. The method of claim 1, wherein in response to a determination that the inverse-transform is not skipped for the current transform block, obtaining the residual samples of the current transform block comprises:
performing a first inverse-transform on inverse-quantized residual coefficients resulting from the inverse-quantization; and
performing a second inverse-transform on first inverse-transformed residual coefficients resultant from the first inverse-transform,
wherein residual coefficients, each of which a scanning order is earlier than a residual coefficient at a position pre-defined in a decoder, are equal to 0, and information on the residual coefficients, each of which the scanning order is earlier than the residual coefficient at the position pre-defined in the decoder, is not present in a bitstream.