PICTURE ENCODER AND DECODER

摘要

PURPOSE: To provide a picture encoder for reducing the circuit scale of a data arrangement processing at the time of encoding pictures and the decoder. CONSTITUTION: Digital picture signals are inputted from a picture input part 101 and blocked for respective prescribed segments, then resective transformation blocks inside segment blocks are orthogonally transformed in an orthogonal transformation part 103 and data inside the transformation blocks are quantized and variable-length-encoded in a variable length encoding part 104. A quantization width is controlled so as to make the data amount of a segment unit after variable length encoding be less than a prescribed data amount. The variable length encoded data are arranged in a segment RAM 105 and a high band data RAM 106 and the data of the high band data RAM 106 are rearranged in the segment RAM 105 in a formatting part 107. The formatted data inside the segment RAM 105 are outputted through a code word output part 108.