DECOMPRESSION PROCESSOR FOR VIDEO APPLICATION

摘要

PURPOSE: To attain communication with an external dynamic RAM via a memory bus by decoding a compressed video signal and executing inverse discrete cosine transformation so as to make communication with a host computer via a host bus. CONSTITUTION: A processor 201 of a video uncompression circuit 200 reads/ writes a built-in data register and a control register to entirely control a decoder coprocessor 202, an inverse discrete cosine transformation coprocessor 203 and a motion compensation coprocessor 204 via a global bus 205 so as to attain intercommunication. Furthermore, communication is made with the host computer via the host bus 206 and with an external dynamic RAM via a memory bus 208.