Data transmission and reception system, data transmitter and data receiver

A data transmission and reception system comprising:

• a data transmitter which multi-divides a transmission signal into a plurality of low-speed tributary signals, forms a frame for every tributary signal, thereafter multiplexes the tributary signals into a high-speed serial signal and transmits the high-speed serial signal through a transmission path;
• and
• a data receiver which receives the serial signal through the transmission path, multi-divides the received serial signal into
• the plurality of low-speed tributary signals, performs tributary synchronization with respect to every tributary signal, thereafter multiplexes the tributary signals into the high-speed serial signal and reproduces the transmission signal,
• wherein the data transmitter, when forming the frame for every tributary signal, inserts, into the frame a frame bit indicating a boundary of the frame and, after having formed the frame, performs only a bit synchronization with respect to every tributary signal, and
• wherein the data receiver, for a respective tributary signal, stores a data indicated by the tributary signal and, in a timing based on a detection of the frame bit of the tributary signal and a reference frame pulse commonly issued between tributary signals, outputs the stored data to thereby perform the tributary synchronization.