Two -wire system video intercom system

• Main Authors: CHEN YUANZHI, YU YUNZHU, ZHU SHENGQIANG, YANG SHUANGQUAN, WANG XIAOQING, LUO ZENGPING, NING HUACAI, ZHAO JIHUI, ZENG GUOCONG, WEI GUIXING, CHEN JINRONG
• Format: Patent
• Language: Chinese; English
• Published: 19.09.2017
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

The utility model provides a two -wire system video intercom system includes indoor set and gate machine, through transmission bus connection between indoor set and the gate machine, first audio frequency module and camera module are drawn together to the gate press packed bale, and audio signal is sent to the transmission bus to first audio frequency module, camera module sends video signal to the transmission bus, the indoor set includes second audio frequency module, video module and control module, second audio frequency module and video module all are connected with the controller, and video signal is sent to the transmission bus to the video module. The transmission bus is just only having, the negative power line, and audio signal and video signal are with weak electric signal's form just, transmit in the negative power line. Received by audio processor chip or video processing chip by the weak electric signal after the transmission to audio signal or video signal rebuild. Utilizing weak electric signa