Granted Patent B2

US 12,316,855 · App. 18/532,667 · Granted May 27, 2025

Inventor: Seung-soo Jeong (Seoul, KR)

Assignee: SAMSUNG ELECTRONICS CO., LTD.

H04N19/139H04N19/105H04N19/176H04N19/577

Abstract

Claims (20)

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

obtaining a first motion vector difference for a first direction by parsing a disparity distance index and a disparity direction index from a bitstream;

if a prediction direction of a current block corresponds to a bi-direction, deriving a second motion vector difference for a second direction, based on the first motion vector difference, a POC (picture order count) of a current picture, a POC of a first reference picture, and a POC of a second reference picture;

obtaining a first motion vector for the first direction using the first motion vector difference and a first base motion vector for the first direction;

obtaining a second motion vector for the second direction using the second motion vector difference and a second base motion vector for the second direction; and

reconstructing the current block using the first motion vector, the first reference picture, the second motion vector and the second reference picture,

wherein a picture is split into a plurality of largest coding units, and a largest coding unit among the plurality of largest coding units is hierarchically split into at least one coding unit comprising the current block.

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

obtaining a first motion vector difference for a first direction by using a first motion vector of a current block for the first direction and a first base motion vector for the first direction;

if a prediction direction of the current block corresponds to a bi-direction, deriving a second motion vector difference for a second direction, based on the first motion vector difference, a POC (picture order count) of a current picture, a POC of a first reference picture, and a POC of a second reference picture; and

generating a bitstream including a disparity distance index and a disparity direction index, the disparity distance index and the disparity direction index representing the first motion vector difference,

wherein a picture is split into a plurality of largest coding units, and a largest coding unit among the plurality of largest coding units is hierarchically split into at least one coding unit comprising the current block.

3. A method of transmitting a bitstream,

the bitstream comprising:

a disparity distance index; and

a disparity direction index,

wherein the disparity distance index and the disparity direction index represent a first motion vector difference for a first direction,

wherein the first motion vector difference for the first direction is obtained by using a first motion vector of a current block for the first direction and a first base motion vector for the first direction,

wherein if it is determined that the current block is to be bi-predicted, a second motion vector difference for a second direction is derived based on the first motion vector difference, a picture order count (POC) of a current picture, a POC of a first reference picture, and a POC of a second reference picture, and

wherein a picture is split into a plurality of largest coding units, and a largest coding unit among the plurality of largest coding units is hierarchically split into at least one coding unit comprising the current block.

Continuity (4)

References Cited (77)