Patent ID: 6847692

Claim:
A data transmission system for digitally transmitting data, comprising: a data sending device comprising: periodic data generating means for generating periodic data; first parallel/serial converting means for multiplexing parallel first transmission data and said periodic data and convening multiplexed data into first serial data; second parallel/serial converting means for multiplexing parallel second transmission data and said periodic data and converting multiplexed data into second serial data; first serial data sending means for sending said first serial data; and second serial data sending means for sending said second serial data; and a data receiving device comprising: first serial data receiving means for receiving said first serial data; second serial data receiving means for receiving said second serial data; first serial/parallel converting means for converting said first serial data into first parallel data; second serial/parallel converting means for converting said second serial data into second parallel data; first periodic data string detecting means for detecting a first periodic data string from strings of said first parallel data; second periodic data string detecting means for detecting a second periodic data string from strings of said second parallel data; master frame signal generating means for generating a master frame signal from first periodic data of said first periodic data string; slave frame signal generating means for generating a slave frame signal from second periodic data of said second periodic data string; a delay adjustment value outputting means for detecting a phase difference between said master frame signal and said slave frame signal, and outputting the detected phase difference as a delay adjustment value; first transmission data restoring means for restoring said first transmission data based on the detected first periodic data string; and second transmission data restoring means for restoring said second transmission data based on the detected second periodic data string and said delay adjustment value.