Video decoding apparatus, video coding apparatus, video decoding method, video coding method, and program

摘要

In the present invention, reconstructed images for prediction are stored in uncompressed reference picture memory and compressed reference picture memory. A video decoder stores in uncompressed reference picture memory a reconstructed image of a frame to be decoded which has been generated on the basis of a prediction, and among reconstructed images which have been stored in the uncompressed reference picture memory, compresses a reconstructed image that will not be used for prediction of the frame to be decoded and stores the image in the compressed reference picture memory. Using the reconstructed images which are stored in the uncompressed reference picture memory and the compressed reference picture memory, the video bitstream is decoded into a video.

主权项

1. A video decoding apparatus for decoding a video bitstream that is coded based on prediction into a video, comprising:
first and second memories in which reconstructed images for use in prediction are stored; a compressor that compresses said reconstructed images; a decompressor that decompresses the compressed reconstructed images; and a video decoder that stores in said first memory a reconstructed image of a frame of interest for decoding generated based on prediction, stores in the second memory after compression via said compressor a reconstructed image of said reconstructed images stored in said first memory, which is not used in prediction of said frame of interest for decoding, and decodes said video bitstream into said video using the reconstructed image stored in said first memory and the reconstructed image decompressed via said decompressor, wherein the reconstructed image of said frame of interest for decoding, stored in said first memory, is used in intra-prediction of said frame of interest for decoding.