Addressable video camera for security monitoring system
US6104428A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1998 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | May 6, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/181
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An addressable video camera has an ability to be assigned an address, that allows a security monitoring system utilizing a plurality of such addressable video cameras to be connected to the security guard room via a single cable. The addressable video camera includes the following: a video imaging device for generating a video signal; an amplifier for amplifying the output video signal; a switch connected between the amplifier and the input/output port of the addressable video camera; an address setting unit for presetting an address value to the addressable video camera; a sync signal detector which is capable of generating a demodulation enable signal in response to the received video control signal; a demodulator for demodulating the address signal in the video control signal; and a microprocessor capable of comparing the demodulated address data with the preset address value. If these match, the switch is turned to the conducting state and the video-imaging device is switched to active operation. It then outputs the video signal. Since the signal transmission between the central control unit and the plurality of addressable video cameras can be carried out over one single cable…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.