Project Discussion Feedback
Now that I've revealed some inner-most secrets of myself and our company, I'm requesting your critique of my performance as comment to this post.
a) What did you enjoy that should be repeated?
b) What didn’t work for you that should be avoided?
c) What did you like best?
d) What did you like least?
e) Please critique the following on a scale of 1 to 5 [5 being outstanding, 1 being abysmal]
- Presentation:
- Content:
- Value:
- Overall:
Thank you for helping me improve future performances.
George Higgins
CEO
a) What did you enjoy that should be repeated?
b) What didn’t work for you that should be avoided?
c) What did you like best?
d) What did you like least?
e) Please critique the following on a scale of 1 to 5 [5 being outstanding, 1 being abysmal]
- Presentation:
- Content:
- Value:
- Overall:
Thank you for helping me improve future performances.
George Higgins
CEO
posted by George | 2:36 PM
1 Comments:
Thank you for being the first to comment. I'm happy to say more about the CCTV product /installation itself.
As the name implies, Closed Circuit television (CCTV) is a system in which the television circuit is "closed", meaning the components are directly connected. (Directly connected in this context includes secure systems linked by microwave, infrared beams, phone lines, internet, coax and so forth. This is unlike broadcast television where any receiver that is correctly tuned can pick up the signal from the airwaves and display the image.)
Probably the most widely known use of CCTV is in security systems such as retail shops, banks, government establishments, etc. The true scope for applications is almost unlimited. Other surveillance examples are listed below:
- Monitoring traffic on a bridge.
- Recording the inside of an oven to find the cause of problems.
- A temporary system to carry out a traffic survey in a town center.
- Production control in a factory.
- The list is almost endless and only limited by the imagination.
The use of video recordings have already proved their worth in court proceedings, enabling the viewing of events as they took place. As an added bonus, the publicity surrounding such events can act as a form of Crime Prevention. It is vital for the success of this evidence that the total integrity of any surveillance system is ensured through installation according to strict legal requirements and conscientious maintainence.
The Surveillance System
- An analog video tape surveillance system will typically include several cameras connected through coax cable to the multiplexer which in turn is connected to one or more monitors and a VCR.
- A typical digital surveillance system will usually include a number of cameras connected to one or more monitors and a DVR.
The Camera
The starting point for any CCTV system is the camera. The camera creates the transmitted image in its field of view. The lens is usually provided separately and sized according to the field of view desired. The camera image is usually transmitted through a coaxial cable although some digital cameras use twisted pair copper wire and have an IP address so they can be directly connected to a computer network. Cameras are usually powered by a separate 24VAC or 12VDC two conductor cable to a power supply, although there are some cameras that can receive power through the coax cable. Surveillance objectives and site environment dictate camera and lens selection and eventual system complexity.
The Sequential Switcher
A switcher enables viewing of several cameras in sequence, the duration of time spent on each camera is determined by preference. Alternatively the automatic sequence can be overridden to remain with a particular camera should something or someone attract interest.
The Multiplexer
Multiplexers have been developed especially for medium or large sized camera installations and replace the sequential switcher. Unlike sequential switchers, the computerized Multiplexer enables a number of cameras to be recorded at the same time. This means that all cameras are being recorded all the time and is accomplished by rapidly interweaving a still image from each camera, one after the other, and streaming these images to the recording device.
The Video Cassette Recorder
The analog Video Cassette Recorder (VCR) used in surveillance systems records on standard video cassette tapes, however since the recorder is specially designed to capture a series of still images (time lapse) rather than a continuous image (real time), it can record as much as 72 hours on a single 2-hour cassette tape. (A VCR receiving input from a multiplexer will record up to 16 cameras simultaneously for up to 72 hours.)
The Digital Video Recorder
The Digital Video Recorder (DVR) used in surveillance systems typically replaces both the multiplexer and the video cassette recorder. It is both a multiplexing device, capable of receiving images from many cameras at once, and a recording device, recording these images on the same type of rotating hard drive memory found in a computer. The size of the memory and the speed of the recorded images determines the length of time images will be stored.
Among DVR features not available to VCRs:
- DVRs can record images at the same time they are searching for or playing back images while VCRs can only do one or the other,
- DVRs can quickly locate images since they are searching a computer disk rather than a linear cassette tape,
- DVRs can automatically archive recordings without intervention, eliminating cassette tape changing and storage management,
- subsequent copies of DVR digital images do not degrade as do copies of VCR analog images, and
- DVRs can be remotely controlled and monitored through a direct phone or internet connection.
The Monitor
The surveillance image is usually viewed on a monitor that is similar to the monitor on a computer or television. The monitor can be color or black and white and have a traditional Cathode Ray Tube (CRT) screen or a newer Liquid Crystal Display (LCD) or plasma display.
The Quad
Normally a single image will occupy the entire display screen of a monitor. Using the Quad however, the images from four cameras will each display in a separate quadrant of the monitor screen so that all four images can be viewed at once on a single monitor.
Please comment again if you'd like to know more about any of this or if something I've said is unclear.
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