Video prediction encoding device, video prediction encoding method, video prediction encoding program, video prediction decoding device, video prediction decoding method, and video prediction decoding program

摘要

#$%^&*AU2020201379A120200312.pdf#####VIDEO PREDICTION ENCODING DEVICE, VIDEO PREDICTION ENCODING METHOD, VIDEO PREDICTION ENCODING PROGRAM, VIDEO PREDICTION DECODING DEVICE, VIDEO PREDICTION DECODING METHOD, AND VIDEO PREDICTION DECODING PROGRAM ABSTRACT A video predictive decoding method executed by a video predictive decoding device, comprising: receiving encoded data comprising compressed picture data representative of a compressed form of a plurality of pictures forming a video sequence, wherein the plurality of pictures are encoded by either intra-frame prediction or inter-frame prediction; decoding the compressed form of the plurality of pictures to reconstruct the plurality of pictures; storing in a decoded picture buffer (DPB) one or more of the reconstructed pictures as reference pictures to be used for decoding a subsequent picture; retrieving (i) a target picture frame size indicative of a frame size of a target picture, (ii) a maximum frame size (MaxLumaFS) defined in advance by level information and indicative of a maximum size of a reconstructed picture storable in the DPB, and (iii) a size of the frame memory (MFSBuffer) expressed by a preset maximum number of reconstructed pictures storable in the DPB; and setting an adaptive maximum number (maxDPBsize) of the reconstructed pictures storable in the DPB equal to the MFSBuffer, a doubled MFSBuffer or a quadrupled MFSBuffer based on relationship between the MaxLumaFS and the target picture frame size, and wherein a number of the reconstructed pictures stored in the DPB is no more than a number set in the maxDPBsize.