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1. 发明专利

JPH09294257A CAMERA CONTROL SYSTEM 失效
公开(公告)号：JPH09294257A
公开(公告)日：1997-11-11
申请号：JP10679296
申请日：1996-04-26
申请人： HITACHI LTD
发明人： SHIBANO SHOGO , KOMATSU MASAYUKI , EHASHI YOSHIAKI
IPC分类号： H04N7/18
摘要： PROBLEM TO BE SOLVED: To obtain the excellent camera control system with reliability and external appearance by connecting sequentially a 1st control port and a 2nd control port in series, connecting a video output terminal of a 1st camera to a monitor and the 1st control port to an operation section to control a plurality of cameras with a few number of wires. SOLUTION: A camera control signal outputted from an operation section 7 is given to a control port P1 of a control section 4 of a camera 1a and another control port P2 is connected to the control port P1 of a camera 1b. Similarly control ports of n-sets of cameras are sequentially connected. On the other hand, as to a video image, a video output terminal of n-th camera connects to (n-1)th camera video input terminal. Succeedingly a video output terminal of the (n-1)th camera connects to a video input terminal of a (n-2)th camera video input terminal. Similarly video output terminals and video input terminals of the n-sets of the cameras are connected sequentially and a video output terminal of the 1st camera 1a connects to a monitor section 8. Thus, a plurality of the cameras are controlled with a few number of wires.

2. 发明专利

JPH02195789A DELAY DIFFERENCE COMPENSATING SYSTEM 失效
公开(公告)号：JPH02195789A
公开(公告)日：1990-08-02
申请号：JP1419589
申请日：1989-01-25
申请人： HITACHI LTD
发明人： EHASHI YOSHIAKI , OKIGUCHI KOTARO
IPC分类号： H04N9/45 , H04N9/77
摘要： PURPOSE:To compensate difference in delay between analog signals with high accuracy by controlling the delay quantity of a compensation circuit corresponding to detected difference in delay by using a reference signal. CONSTITUTION:The analog signals of two systems are supplied to A/D converters 4a and 4b via input processing circuits 2a and 2b, respectively, and each signal is converted with the same phase. At such a case, delay compensation circuits 3a and 3b are provided between the circuits 2a, 2b and the converters 4a and 4b. And the reference signal is attached 1a on an input signal from a reference signal generation circuit 6a at the preceding stage of the circuit 2a, and the difference between a preset reference voltage and the voltage of the reference signal attached on the input signal is detected at a comparator 7a at a succeeding stage, and a differential voltage is detected at a delay comparator 8 as the difference in delay time, and it is supplied to the circuit 3a via an integration circuit 9, a switch change-over signal generation circuit 10, thereby, the delay quantity can be controlled.

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