PICTURE DATA COMPRESSION EXPANSION DEVICE

摘要

PURPOSE:To allow a compression expansion device for a picture data to attain high speed processing while suppressing a large sized buffer used to store data tentatively. CONSTITUTION:A picture data compression expansion device 2 is connected to a host computer 1 via a bus 3 and entres a picture data to a picture buffer 4 at compression by using a picture buffer controller 6 and a code data buffer use controller 7. Then a code data obtained by compression processing at a data compression expansion engine 8 is returned from the code buffer 5 to the host computer 1, and at expansion, the code data is inputted to the code buffer 5 and the picture data decoded by expansion processing by the data compression expansion engine 8 is returned from the picture buffer 4 to the host computer 1. A large sized buffer is suppressed by dividing the data by one picture and inputting the result to one buffer and the picture buffer 4 is subject to high speed processing as a ping-pong buffer.