GB2343820A - Closed circuit television system - Google Patents

Closed circuit television system Download PDF

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Publication number
GB2343820A
GB2343820A GB9818403A GB9818403A GB2343820A GB 2343820 A GB2343820 A GB 2343820A GB 9818403 A GB9818403 A GB 9818403A GB 9818403 A GB9818403 A GB 9818403A GB 2343820 A GB2343820 A GB 2343820A
Authority
GB
United Kingdom
Prior art keywords
control system
control
television
closed circuit
monitors
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9818403A
Other versions
GB9818403D0 (en
Inventor
Royston David Warren
Leonard Maxwell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB9818403A priority Critical patent/GB2343820A/en
Publication of GB9818403D0 publication Critical patent/GB9818403D0/en
Publication of GB2343820A publication Critical patent/GB2343820A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19697—Arrangements wherein non-video detectors generate an alarm themselves
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19634—Electrical details of the system, e.g. component blocks for carrying out specific functions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

In a closed circuit television system comprising CCTV cameras and a television, signals from the cameras are transmitted to the television at least in part via the coaxial lead between the television and its aerial without interfering with broadcast transmissions. This method saves on wiring and reduces interference. The coaxial lead may also be used for other stated purposes, namely control of floodlights, adjustment of rotation of directional antennas, the control of alarm systems, and the control of monitors of wind speed and direction, outside temperature, relative humidity, rainfall and ambient noise.

Description

SUPER IMPOSED DATA TRANSFER OVER A UHF UNBALANCED LINE This invention relates to the installation of closed circuit television [cctv] picture monitoring systems and other sensing devices using a domestic installed roof or loft aerial coaxial lead thus eliminating the need for major wiring to the installation and saving on fitting and redecoration costs.
Closed circuit television installations have been around for some years and have been mainly installed in public places such as, shopping precincts, department stores, railway stations, city and town streets, etc; very few have been installed in domestic locations due to the high cost of cameras and installation. However! Due to the replacement of camera vidicon tubes [image detection element of cameras] to a semi-conductor based detector [CCD] cameras have been reduced in price and therefore it is now evident that major sales in the domestic market place will rise.
With the cost of equipment constantly falling there still remains one prohibiting factor for the domestic market, installation which, due to ever rising labour costs, will keep rising. With conventional methods of installation greater lengths of wiring to control units are inevitable and leads to greater susceptibility to interference from domestic and other electrical appliances and electrical loss in the wiring thus leading to poorer picture quality. The proposed method of installation using SuperImposed Data Transfer [SIDT] over a UHF unbalanced line method eliminates all of the downfalls of the conventional wiring methods. SIDT directs images right where they are needed, straight to the back of of the domestic television and/or video recording equipment.
With SIDT it becomes possible to control floodlights, security alarm systems, wind speed monitors, outside temperature monitors, relative humidity, adjust rotation of directional antennas, the measurement of outside ambient noise, wind direction and rain detectors.
The data protocol is transmitted through a television 750 ohm coaxial lead in such a way as not to interfere with the normal television broadcast transmissions whilst simultaneously transmitting data. This is accomplished by running the protocol cycle at a greater wavelength than the transmitted radio frequency carrier used to convey the television pictures.
The RF potential between the screen and the centre lead of the coaxial is artificially raised in sympathy with the transmitted data and is then filtered so as to be transparent to the television tuner RF amplifier.
The antenna junction is also filtered thus eliminating the short circuit effect of the antenna di-pole loop which is not resonant with the protocol frequency.
Figure I shows the conventional wiring method Figure 2 shows the use of Super Imposed Data Transfer [SIDT]

Claims (10)

1. A control system that overcomes the susceptibility to interference from domestic or other electrical equipment and electrical loss in wiring by using an existing or added aerial coaxial to transmit quality pictures of closed circuit television.
2. A control system as in Claim 1 wherein there is control of floodlights
3. A control system as in Claims 1 & 2 wherein there is control of security alarm systems.
4. A control system as in Claims 1,2 & 3 wherein it is possible to control wind speed monitors
5. A control system as in Claims 1,2,3 & 4 wherein it is possible to control outside temperature monitors
6. A control system as in Claims 1, 2,3,4, & 5 wherein it is possible to control relative humidity monitors
7. A control system as in Claims 1, 2,3,4,5, & 6 wherein it is possible to adjust rotation of directional antennas.
8. A control system as in Claims 1,2,3,4,5,6, & 7 wherein it is possible to measure outside ambient noise
9. A control system as in Claims 1,2,3,4,5,6,7, & 8 wherein it is possible to measure wind direction
10. A control system as in Claims 1,2,3,4,5,6,7,8, & 9 wherein it is possible to detect rainfall.
GB9818403A 1998-08-25 1998-08-25 Closed circuit television system Withdrawn GB2343820A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9818403A GB2343820A (en) 1998-08-25 1998-08-25 Closed circuit television system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9818403A GB2343820A (en) 1998-08-25 1998-08-25 Closed circuit television system

Publications (2)

Publication Number Publication Date
GB9818403D0 GB9818403D0 (en) 1998-10-21
GB2343820A true GB2343820A (en) 2000-05-17

Family

ID=10837728

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9818403A Withdrawn GB2343820A (en) 1998-08-25 1998-08-25 Closed circuit television system

Country Status (1)

Country Link
GB (1) GB2343820A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5064098A (en) * 1973-10-09 1975-05-30
GB1487420A (en) * 1972-12-28 1977-09-28 Hochiki Co Alarm systems
GB2194088A (en) * 1986-08-08 1988-02-24 Axon Research Limited Energy control and communication system
US4959713A (en) * 1989-10-10 1990-09-25 Matsushita Electric Industrial Co., Ltd. Home automation system
GB2231469A (en) * 1987-12-30 1990-11-14 Satellite Technology Systems L Control device for domestic electrical equipment
GB2289144A (en) * 1994-04-30 1995-11-08 Robert David Briars Surveillance camera control system
GB2296150A (en) * 1994-12-17 1996-06-19 Stephen James Tonks Surrveillance systems
GB2312803A (en) * 1996-05-03 1997-11-05 Eamon John Gilmartin Television camera security system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1487420A (en) * 1972-12-28 1977-09-28 Hochiki Co Alarm systems
JPS5064098A (en) * 1973-10-09 1975-05-30
GB2194088A (en) * 1986-08-08 1988-02-24 Axon Research Limited Energy control and communication system
GB2231469A (en) * 1987-12-30 1990-11-14 Satellite Technology Systems L Control device for domestic electrical equipment
US4959713A (en) * 1989-10-10 1990-09-25 Matsushita Electric Industrial Co., Ltd. Home automation system
GB2289144A (en) * 1994-04-30 1995-11-08 Robert David Briars Surveillance camera control system
GB2296150A (en) * 1994-12-17 1996-06-19 Stephen James Tonks Surrveillance systems
GB2312803A (en) * 1996-05-03 1997-11-05 Eamon John Gilmartin Television camera security system

Also Published As

Publication number Publication date
GB9818403D0 (en) 1998-10-21

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)