SIGNAL CONVERTING DEVICE, DEVICE AND SYSTEM FOR TRANSMITTING SIGNAL, SIGNAL RECEIVING METHOD AND SIGNAL TRANSMITTING METHOD

摘要

PROBLEM TO BE SOLVED: To prevent signal deterioration or the like when digital data are converted into analog data and transmitted on an analog transmission line. SOLUTION: When a digital signal inputted to a device 20 is converted into an analog signal and outputted onto an analog transmission lien 2 for transmitting analog signals and the transmitted analog signal is received by a device 30, a transmitting side and a receiving side are connected by a digital transmission line 3 capable of transmitting a control signal or the like and on the digital transmission line 3, data required for processing the analog signals to be transmitted on the analog transmission line 2 are transmitted so that the device 30 on the receiving side can conduct processing for preventing the deterioration or the like of signals to be transmitted.