GB2343820A - Closed circuit television system - Google Patents
Closed circuit television system Download PDFInfo
- 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- Withdrawn
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
Landscapes
- 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.
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)
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 |
-
1998
- 1998-08-25 GB GB9818403A patent/GB2343820A/en not_active Withdrawn
Patent Citations (8)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8949870B2 (en) | Transfer of information from an information node to a broadcast programming receiver | |
US6624845B2 (en) | Apparatus within a street lamp for remote surveillance having directional antenna | |
US6424371B1 (en) | Intelligent video monitor system | |
US7250853B2 (en) | Surveillance system | |
US4777526A (en) | Security monitor system | |
US7573502B2 (en) | Camera apparatus | |
GB2343820A (en) | Closed circuit television system | |
EP1265442A1 (en) | Video and sound signal transmission system applicable to railways | |
JP2005012583A (en) | Transmission device and receiving device of terrestrial digital television broadcast | |
US20060075450A1 (en) | Systems, devices, and methods for providing high-resolution, live, real-time video signal data and other data using low frequency bandwidth | |
KR20080073848A (en) | Apparatus for security of substation using power line communications | |
KR101465037B1 (en) | Long distance transmission system of digital high-definition image signal | |
AU2012100359A4 (en) | A portable multi-camera surveillance and monitoring system | |
O'Leary et al. | Mobile broadcasting of DVB-T signals | |
BR9815180B1 (en) | method and apparatus for terrestrial broadcasting in the presence of satellite transmissions on a common frequency. | |
JP2000278656A (en) | Information processing method for catv system | |
CA1045732A (en) | Intruder detector system and method therefore | |
US6771184B1 (en) | Data devices | |
JPH0855286A (en) | Object detecting device and object detection system using same | |
EP3086490A1 (en) | Flat antenna and satellite signal transmitting system including the flat antenna | |
Camera | C. Monitor | |
JPS6220402A (en) | Indoor high frequency antenna system | |
JP3419571B2 (en) | Remote monitoring device | |
US20040075740A1 (en) | Transmitter for surveillance camera system | |
TWI220968B (en) | Monitoring/alarming system using coaxial transmission |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |