Patent ID: 11876999
Assignee: KT CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. An apparatus for transmitting a compressed video data, the apparatus comprising:
a processor configured to generate a bitstream including a first motion vector difference value for a current coding unit specifying a difference between a first motion vector and a first motion vector prediction value,
a second motion vector difference value for the current coding unit specifying a difference between a second motion vector and a second motion vector prediction value, and
index information specifying one of a plurality of weighted prediction parameter candidates; and
a transmitting unit configured to transmit the compressed video data including the bitstream,
wherein a first prediction block for the current coding unit is generated by using the first motion vector and a first reference picture of the current coding unit,
wherein a second prediction block for the current coding unit is generated by using the second motion vector and a second reference picture of the current coding unit,
wherein one of a first weight and a second weight is determined to be one of the plurality of weighted prediction parameter candidates specified by the index information,
wherein a final prediction block of the current coding unit is generated by applying the first weight to the first prediction block and the second weight to the second prediction block,
wherein maximum bit-length of the index information is determined based on a temporal direction of the first reference picture and the second reference picture,
wherein the index information is binarized with a truncated unary binarization, and
wherein the maximum bit-length of the index information is different between when both the first reference picture and the second reference picture are previous or subsequent reference pictures and when one of the first reference picture and the second reference picture is a previous reference picture and the other of the first reference picture and the second reference picture is a subsequent reference picture, the previous reference picture representing a reference picture whose a picture order count is less than a picture order count of a current picture and the subsequent reference picture representing a reference picture whose a picture order count is greater than the picture order count of the current picture.