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    • 4. 发明专利
    • PICTURE DATA TRANSMISSION SYSTEM
    • JPS6248857A
    • 1987-03-03
    • JP18921585
    • 1985-08-28
    • MITSUBISHI HEAVY IND LTD
    • WAKIMOTO NAOHIKOMORITA TETSUROMIYAGAWA ICHIRO
    • G06F13/00H04L13/08H04N1/00H04N7/00
    • PURPOSE:To transmit many data inexpensively and at a high speed without deteriorating the data transmission efficiency by providing a computer interface circuit, an optical file interface circuit and a buffer memory to a picture data transmitter. CONSTITUTION:A picture data transmitter 8 is provided with a cycle steal input/output port 20 of a computer system 19, a computer interface circuit 14 connected directly to the port and its driver/receiver 15 and also provided with an optical file interface circuit 10 connected directly with a communication port 7 of an optical file system 6 and its driver/receiver 9 and a data buffer 13 storing tentatively picture data is provided in-between. Thus, the difference from the data width and control timing between both the systems are solved. Further, the maximum data transfer speed is obtained by adjusting the constitution and capacity of the buffer 13 taking the waiting time until the transfer of the system 19 and the transfer speed, the access time of an optical deck of the system 6, the drive speed and the transfer efficiency attended with sequential access into consideration.