WIRELESS SPEECH SYSTEM WITH MONITOR

摘要

PROBLEM TO BE SOLVED: To provide a structure of a wireless speech system with a monitor by which a transmission capacity of a transmission channel can effectively be utilized. SOLUTION: In the case of making a speech between a doorphone slave set D with camera and an interphone sub master set F with monitor, an interphone master set B with monitor transmits a voice signal and a video signal compressed by an analysis synthesis coding system in time division multiplex to the interphone sub master set F with monitor, and the interphone sub master set F with monitor transmits the voice signal compressed by a waveform coding system to an interphone master set E with monitor. Thus, the transmission capacity of a transmission channel between the interphone master set E with monitor and the interphone sub master set F with monitor can effectively be utilized.