Patent ID: 11863740
Assignee: SUNGKYUNKWAN UNIVERSITY FOUNDATION FOR CORPORATE COLLABORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An image decoding method with a decoding apparatus, the image decoding method comprising:
(a) receiving an encoded bit stream of a current picture to be decoded;
(b) recovering a selected motion vector from the current picture to a first decoding reference picture by entropy decoding the encoded bit stream of the current picture, the first decoding reference picture being different from the current picture;
(c) calculating a calculated motion vector from the current picture to a second decoding reference picture by scaling the selected motion vector based on a first temporal distance between the current picture and the first decoding reference picture and a second temporal distance between the current picture and the second decoding reference picture, the calculated motion vector being used for inter prediction of a current block belonging to the current picture, the second decoding reference picture being different from the first decoding reference picture;
(d) generating a prediction block relating to the current block in the current picture, based on the calculated motion vector;
(e) generating a residual block relating to the current block through a residual data decoding process based on the entropy decoded bit stream; and
(f) recovering the current block based on the prediction block and the residual block,
wherein the calculating the calculated motion vector is performed based on whether a prediction direction for the selected motion vector is identical to or different from a prediction direction for the calculated motion vector, and
wherein the residual block is generated by performing inverse-quantization for entropy decoded transform coefficients.