Patent ID: 6671520
Filing Date: 2003-12-30
Classification: G08C,H04B,H04L,H04W,Y02D

Abstract:
A wireless communication system for transmitting and receiving video and audio signals, the communication system comprising:a central station having a display and a speaker, the central station sending out control command data containing a remote terminal identifier, a communication frequency channel number and any one of a test command, a power on command and a power off command, receiving response data corresponding to the control command data and reproducing video and audio signals transmitted at a frequency corresponding to the communication frequency channel number, respectively, through the display and speaker in response to the received response data; and at least one remote terminal having a camera and a microphone, the remote terminal receiving the control command data from the central station, sending out the response data corresponding to the received control command data to the central station and, in a power on mode based on the power on command, driving the camera, the microphone and a video/audio signal transmitter and transmitting a video signal from the camera and an audio signal from the microphone to the central station at the frequency corresponding to the communication frequency channel number.