BAND COMPRESSION SIGNAL PROCESSOR

摘要

PURPOSE:To improve the picture quality in a high speed reproduction mode by adding overhead data respectively to the variable length code of a refresh block and the variable length code of a non-refresh block so as to from a macro block. CONSTITUTION:A luminance signal Y and chrominance signals U,V fed to input terminals 27-29 are combined by a block processing circuit 30 and the result is fed to a subtraction circuit 12 and a motion evaluation circuit 13 as an input video signal from an input terminal 11, and a video code subjected to a band compression coding is outputted from a variable length coding circuit 16. Then in-frame signal processing is applied synchronously to a signal in b-sets of picture areas among a-sets of areas at every frame synchronously with f-frames (f is an integer being >=2) by the refresh coding processing. Then overhead data representing the content of a variable length code are respectively added to the variable length code of a refresh block and the variable length code of a non-refresh block so as to form a macro block.