Title :
Multiple FM-video signal transmission through optical fiber for use in security
Author :
Mochizuki, Hitoshi ; Ikeda, Hiroaki ; Yoshida, Hirofumi ; Shinohara, Shigenobu
Author_Institution :
Shizuoka Univ., Hamamatsu, Japan
Abstract :
Described is a dual FM video signal transmission system with an optical fiber for use in monitoring pictures for security purpose. Each video signal from each video camera is modulated by the FM scheme actualized by using a VCO operating at 30 MHz or 50 MHz, and the modulated RF video signal is sent to the optical fiber through the electrical-to-optical converter consisting of an LED at 850 nm. The optical FM video signal is received by using the optical-to-electrical converter. Each received FM video signal is demodulated by using a PLL to reproduce the video signal. The camera mount attitude for one of a pair of video cameras can be adjusted by the optical control signal issued from the monitoring site
Keywords :
closed circuit television; frequency modulation; optical fibre communication; optical fibres; optical modulation; surveillance; video cameras; video signals; 30 MHz; 50 MHz; 850 nm; LED; PLL; VCO; camera mount attitude; electrical-to-optical converter; modulated RF video signal; monitoring site; multiple FM-video signal transmission; optical control signal; optical fiber; optical-to-electrical converter; picture monitoring; security; video camera; Cameras; Light emitting diodes; Monitoring; Optical fibers; Optical modulation; Phase locked loops; RF signals; Radio frequency; Security; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 1993., Proceedings of the 36th Midwest Symposium on
Conference_Location :
Detroit, MI
Print_ISBN :
0-7803-1760-2
DOI :
10.1109/MWSCAS.1993.343328
