Video decoding apparatus, video decoding method saving the lines of the picture in the plurality of memories, and saving method of reference picture

This saving the lines of the screen divided in a plurality of memory video decoding device, video decoding method and the reference screen storage is disclosed. Video decoding apparatus according to the present invention is provided with a plurality of memories and decoders. A plurality of decoders and stores each of the line portion during a plurality of lines on the screen. A decoder to receive and decode the line of the stored screen from said plurality of memory. The lines are a decoder to receive the same number of lines from the memory of the each of the divided and stored in the plurality of memory. A video decoding device, video decoding method and the reference screen storage method according to the invention has the advantage of increasing the speed of decoding the picture. Further, it is possible to reduce the latency (latency) in the decoding process, has the advantage of reducing the bandwidth (Band Width).