Patent ID: 9667998
Date: 2017-05-30
CPC Classifications: H04N

Claim:
1. A video predictive decoding method executed by a video predictive decoding device, comprising: an input step of inputting (i) picture data in a compressed form for reproduction of a target picture[k], the picture data resulting from execution of predictive coding, using a first set of reference pictures, on the target picture[k] and (ii) buffer description information BD[k] in a compressed form which describes the first set of reference pictures used to predictively encode the target picture[k], wherein the first set of reference pictures are described in the buffer description information BD[k] with their identification numbers relative to identification numbers of a second set of reference pictures described in buffer description information BD[m] which are used to reproduce another target picture [m] different from the target picture [k]; a reconstruction step of decoding the picture data to reproduce the target picture[k]; a picture storage step of storing the reproduced target picture [k] as a reference picture to be used for decoding of a subsequent target picture; and a buffer management step of controlling the picture storage step, the buffer management step comprising: wherein referencing the buffer description information BD[m] to restore the identification numbers of the first set of reference pictures described in the buffer description information BD[k] comprises: restoring an index m identifying the buffer description information BD[m], restoring a value of deltaBD representing a difference between identification numbers corresponding reference pictures described in the buffer description information BD[m] and the buffer description information BD[k], restoring a plurality of flags ibd_flag[j] each adapted to take multiple values one of which is indicative of both: restoring the identification numbers of the first set of reference pictures described in the buffer description information BD[k] based on the restored index m, the restored value of deltaBD and the restored flags ibd_flag[j].