CPC H04N 19/105 (2014.11) [H04N 19/139 (2014.11); H04N 19/176 (2014.11); H04N 19/521 (2014.11); H04N 19/70 (2014.11)] | 17 Claims |
1. A method for decoding an inter-predicted video block, the method comprising:
receiving, by a device comprising a memory storing instructions and a processor in communication with the memory, a coded video bitstream;
extracting, by the device from the coded video bitstream, a flag indicating whether an inter-predication mode is a JOINT_NEWMV mode for a current block in a current frame, wherein the JOINT_NEWMV mode indicates that a first delta motion vector (MV) for a first reference frame from a reference list 0 and a second delta MV for a second reference frame from a reference list 1 are jointly signaled, the inter-predication mode is configured as the JOINT_NEWMV mode in response to a direction relationship of the first reference frame and the second reference frame relative to the current frame indicating opposite direction, and a first picture order count (POC) distance between the first reference frame and the current frame being equal to a second POC distance between the second reference frame and the current frame;
in response to the flag indicating that the inter-predication mode is the JOINT_NEWMV mode:
extracting, by the device from the coded video bitstream, a joint delta MV for the current block, and
deriving, by the device, the first delta MV and the second delta MV based on the joint delta MV; and
decoding, by the device, the current block in the current frame based on the first delta MV and the second delta MV.
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