US 2024/0187604 A1 · JOINT CODING OF MOTION VECTOR DIFFERENCE

Abstract

This disclosure relates generally to video coding and particularly to methods and systems for providing signaling schemes for jointly coding of motion vector difference. An example method for decoding a current video block of a video bitstream is disclosed. The method includes receiving a coded video bitstream; determining, from the coded video bitstream, a flag for a current video block, wherein the flag indicates whether joint motion vector difference (MVD) coding is applied to the current video block; and in response to the flag indicating that the joint MVD coding is applied to the current video block: obtaining, by the device from the coded video bitstream, a joint MVD for the current video block, deriving, by the device based on the joint MVD, an MVD for the current video block, and decoding, by the device based on the joint MVD and the derived MVD, the current video block.

Claims20

Dependent claims

A method for encoding a current video block of a video bitstream into a coded video bitstream, comprising;

receiving, by a device comprising a memory storing instructions and a processor in communication with the memory, the video bitstream comprising the current video block;
determining, by the device based on the video bitstream, a flag for the current video block, wherein the flag indicates whether joint motion vector difference (MVD) coding is applied to the current video block;
and
when the flag indicates that the joint MVD coding is applied to the current video block:
encoding, by the device based on the video bitstream, a joint MVD for the current video block into the coded video bitstream,
deriving, by the device based on the joint MVD, an MVD for the current video block, and
encoding, by the device based on the joint MVD and the derived MVD, the current video block into the coded video bitstream,
wherein the flag indicates whether to apply joint MVD and to derive reference frame to the current video block in a single reference mode.

5 more elements

An apparatus for encoding a current video block of a video bitstream into a coded video bitstream, the apparatus comprising:

a memory storing instructions;
and
a processor in communication with the memory, wherein, when the processor executes the instructions, the processor is configured to cause the apparatus to:
receive the video bitstream comprising the current video block;
determine, based on the video bitstream, a flag for the current video block, wherein the flag indicates whether joint motion vector difference (MVD) coding is applied to the current video block;
and
when the flag indicates that the joint MVD coding is applied to the current video block:
encode, based on the video bitstream, a joint MVD for the current video block into the coded video bitstream,
derive, based on the joint MVD, an MVD for the current video block, and
encode, based on the joint MVD and the derived MVD, the current video block into the coded video bitstream,
wherein the flag indicates whether to apply joint MVD and to derive reference frame to the current video block in a single reference mode.

8 more elements

A non-transitory computer readable storage medium storing instructions, wherein, when the instructions are executed by a processor, the instructions are configured to cause the processor to:

receive a video bitstream comprising a current video block;
determine, based on the video bitstream, a flag for the current video block, wherein the flag indicates whether joint motion vector difference (MVD) coding is applied to the current video block;
and
when the flag indicates that the joint MVD coding is applied to the current video block:
encode, based on the video bitstream, a joint MVD for the current video block into a coded video bitstream,
derive, based on the joint MVD, an MVD for the current video block, and
encode, based on the joint MVD and the derived MVD, the current video block into the coded video bitstream,
wherein the flag indicates whether to apply joint MVD and to derive reference frame to the current video block in a single reference mode.

5 more elements

Dependencies are inferred from the claim text.

Joint coding of motion vector difference

Life of this patent

Joint coding of motion vector difference

Life of this patent

Abstract

Claims20