System for transmitting and receiving signals of serial data interface format and serial digital data interface format on the same path

摘要

A data transmission system etc. which can transmit and receive a signal of a serial data interface (SDI) system and a signal of a serial digital data interface (SDDI) system mixed on the same transmission path. A serial to parallel conversion circuit receives a transmission signal and converts the same to a reception signal of a 10-bit parallel format. A packet classification data detection circuit detects the transmission packet from the reception signal and detects the content of the positions of separation codes SAV and EAV of the transmission packet. An FIFO performs buffering so that the beginning of the transmission packet will not be cut off. A selector circuit separates the SDI data and the SDDI data under the control of a control circuit in accordance with the contents of the SAV and EAV of the transmission packet and outputs the same.