Granted Patent B2

US 12,231,673 · App. 18/434,295 · Granted Feb 18, 2025

Inventors: Jin-Young Lee (Suwon-si, KR); Woong-Il Choi (Osan-si, KR)

Assignee: SAMSUNG ELECTRONICS CO., LTD.

H04N19/513H04N19/176H04N19/44

Abstract

Claims (15)

1. A method of decoding motion information, the method comprising:

determining whether a list 0, a list 1 or bi-prediction is used for a current block;

when it is determined that the bi-prediction is used for the current block, obtaining, from a bitstream, information indicating whether motion information is omitted or not;

obtaining, from the bitstream, a motion vector difference for the list 0;

if the information indicates that the motion information is omitted, determining a motion vector difference for the list 1 using a predetermined first method without obtaining from the bitstream, and determining a reference picture index for the list 0 and a reference picture index for the list 1 using a predetermined second method without obtaining from the bitstream; and

decoding the current block using the motion vector difference for the list 0, the motion vector difference for the list 1, the reference picture index for the list 0 and the reference picture index for the list 1.

2. A method of encoding motion information, the method comprising:

determining whether a list 0, a list 1 or bi-prediction is used for a current block;

when it is determined that the bi-prediction is used for the current block, determining whether to omit motion information; and

generating a bitstream including information indicating whether the motion information is omitted or not, and a motion vector difference for the list 0,

wherein when it is determined to omit the motion information, a motion vector difference for the list 1, that is not included in the bitstream, is determined using a predetermined first method, and a reference picture index for the list 0 and a reference picture index for the list 1, that are not included in the bitstream, are determined using a predetermined second method.

3. A non-transitory computer-readable recording medium having stored therein a bitstream, the bitstream comprising:

information indicating whether motion information is omitted or not, and a motion vector difference for a list 0,

wherein whether a list 0, a list 1 or bi-prediction is used for a current block is determined, and the information is comprised in the bitstream when the current block is bi-predicted,

wherein if the information is generated to indicate that the motion information is omitted, a motion vector difference for the list 1, that is not included in the bitstream, is determined using a predetermined first method, and a reference picture index for the list 0 and a reference picture index for the list 1, that are not included in the bitstream, are determined using a predetermined second method.

Continuity (4)

References Cited (75)