ENCODER AND DECODER FOR PICTURE SIGNAL

摘要

PURPOSE:To best correct the decoded picture signal with a simple configuration. CONSTITUTION:An encoder 18 of an encoding device 1 encodes a PST flag showing the encoding condition of a pre-filter 21 together with the bit stream being picture data at the same time. The bit stream and the PST flag are sent to a recording medium 3 at the same time. The bit stream and the PST flag encoded and stored in the recording medium 3 are decoded by a decoder 31 of a decoding device 2. The decoded bit stream is inputted to a format conversion circuit 32 and it is converted from the block format into the frame format. On the other hand, the decoded PST flag is sent to a post filter 22 which selects the optimal filter by the PST flag.