Granted Patent B2

US 12,726,639 · App. 18/975,416 · Granted Sep 1, 2026

Inventor: Sun Young Lee (Seongnam-si, KR)

Assignee: SAMSUNG ELECTRONICS CO., LTD.

H04N19/188H04N19/82

Abstract

Claims (29)

1 . A video decoding method performed by a video decoding device, the method comprising:

obtaining a first flag indicating whether a current picture includes subpictures having different network abstraction layer (NAL) unit types; and

obtaining second flags respectively corresponding to the subpictures,

wherein each of the second flags indicates whether a corresponding subpicture is treated as a picture in a decoding process,

wherein, when the first flag indicates that the current picture includes subpictures having different NAL unit types, second flags for all subpictures including at least one of P slice or B slice among the subpictures are restricted to have a first value, and

wherein the first value indicates that the corresponding subpicture is treated as a picture in a decoding process.

2 . A video decoding device comprising:

a memory configured to store one or more instructions; and

a processor configured to:

obtain a first flag indicating whether a current picture includes subpictures having different network abstraction layer (NAL) unit types; and

obtain second flags respectively corresponding to the subpictures,

wherein each of the second flags indicates whether a corresponding subpicture is treated as a picture in a decoding process,

wherein, when the first flag indicates that the current picture includes subpictures having different NAL unit types, second flags for all subpictures including at least one of P slice or B slice among the subpictures are restricted to have a first value, and

wherein the first value indicates that the corresponding subpicture is treated as a picture in a decoding process.

3 . A video encoding method performed by a video encoding device, the method comprising:

determining whether a current picture includes subpictures having different network abstraction layer (NAL) unit types;

determining whether the subpicture is treated as a picture in a decoding process; and

generating a first flag indicating whether the current picture includes subpictures having different NAL unit types and second flags respectively corresponding to the subpictures, wherein

wherein each of the second flags indicates whether a corresponding subpicture is treated as a picture in a decoding process,

wherein, when the first flag indicates that the current picture includes subpictures having different NAL unit types, second flags for all subpictures including at least one of P slice or B slice among the subpictures are restricted to have a first value, and

wherein the first value indicates that the subpicture is treated as a picture in a decoding process.

4 . A method of storing a bitstream of a video into a non-transitory computer-readable storage medium, wherein the bitstream is generated by a method performed by a video processing device, the method comprising:

determining whether a current picture includes subpictures having different network abstraction layer (NAL) unit types;

determining whether the subpicture is treated as a picture in a decoding process;

generating a first flag indicating whether the current picture includes subpictures having different NAL unit types and second flags respectively corresponding to the subpictures; and

generating the bitstream including the first flag and the second flags,

wherein each of the second flags indicates whether a corresponding subpicture is treated as a picture in a decoding process,

wherein, when the first flag indicates that the current picture includes subpictures having different NAL unit types, second flags for all subpictures including at least one of P slice or B slice among the subpictures are restricted to have a first value, and

wherein the first value indicates that the subpicture is treated as a picture in a decoding process.

Priority Claims (3)

Continuity (5)

References Cited (45)