Granted Patent B2

US 12,206,849 · App. 18/370,604 · Granted Jan 21, 2025

Inventor: Bae Keun Lee (Seoul, KR)

Assignee: KT CORPORATION

H04N19/119H04N19/129H04N19/132H04N19/174H04N19/176H04N19/182H04N19/186H04N19/30H04N19/44H04N19/50H04N19/597H04N19/91H04N19/96

Abstract

Claims (27)

1. A method for decoding a video, the method comprising:

obtaining prediction samples of a current block, the prediction samples of the current block being obtained by performing intra prediction or inter prediction;

performing an inverse-quantization for the current block;

determining whether an inverse-transform is skipped for the current block or not;

when it is determined that the inverse-transform is not skipped for the current block, determining a transform type for the current block;

obtaining residual samples of the current block by performing the inverse-transform based on the determined transform type; and

reconstructing the current block based on the prediction samples and the residual samples,

wherein whether to parse a transform skip flag, indicating whether the inverse-transform is skipped or not, from a bitstream is determined based on a partition type of a coding block including the current block, and

wherein when the partition type of the coding block represents that the coding block is partitioned into a plurality of partitions in either a vertical direction or a horizontal direction, the transform skip flag is not parsed from the bitstream and it is determined that the inverse-transform is not skipped for the current block.

2. The method of claim 1 , wherein whether an asymmetric partitioning type is available for the coding block is determined based on a size of the coding block.

3. A method for encoding a video, the method comprising:

obtaining prediction samples of a current block, the prediction samples of the current block being obtained by performing intra prediction or inter prediction;

determining whether a transform is skipped for the current block or not;

when it is determined that the transform is not skipped for the current block, determining a transform type for the current block;

performing the transform for the current block based on the determined transform type;

performing a quantization for the current block; and

encoding residual coefficients of the current block,

wherein whether to encode a transform skip flag, indicating whether the transform is skipped or not, into a bitstream is determined based on a partition type of a coding block including the current block, and

wherein when the partition type of the coding block including the current block represents that the coding block is partitioned into a plurality of partitions in either a vertical direction or a horizontal direction, the transform skip flag is not encoded into the bitstream and the transform is not skipped for the current block.

4. A transmitting apparatus of data for image information, comprising:

at least one processor configured to obtain a bitstream which comprising information on residual coefficients of a current block; and

a transmitter configured to transmit the data comprising the bitstream of the image information,

wherein the residual coefficients are derived by:

performing a quantization for the current block; and

performing a transform for the current block,

wherein whether a transform skip flag, indicating whether the transform is skipped or not, is included in the bitstream or not is determined based on a partition type of a coding block including the current block, and

wherein when the partition type of the coding block including the current block represents that the coding block is partitioned into a plurality of partitions in either a vertical direction or a horizontal direction, the transform skip flag is not included in the bitstream and the transform is not skipped for the current block.

Assignments (1)

Priority Claims (2)

Continuity (3)

References Cited (149)