JPS57184354A - Digital transmitter - Google Patents

Abstract

PURPOSE:To ensure a certain value for the delay time of transmission of information from the input of a transmitting buffer memory device through the output of a receiving buffer memory device, by periodically setting the transmitting speed of information at a constant level for a cerfain period of time at a transmitting part. CONSTITUTION:The TV signal supplied to a coding device 11 is transmitted to a multiplexing circuit 12 through a transmitting part and written into a transmitting buffer memory 13. A dummy adding circuit 14, when detecting a specific pattern whose transmission is inhibited in the information read out of the memory 13, inserts the dummy data into the block. The circuit 14 also inserts the dummy data when the fixing of the transmitting speed is requested by an information transmitting speed control circuit 15. At the receiving part, the transmitted information is fed to a dummy eliminating circuit 16 and then written into a receiving buffer memory 17. Then a separating circuit 18 reads the information out of the memory 17 based on a command given from an information storage quantity monitor circuit 20 and sends it to a decoding device 19.