December 2010

December 16, 2010

SUPERVISORY CONTROL ON DIGITAL TV

The age of digital broadcasting is here, and with it comes a new set of problems and solutions. Before the digital revolution many broadcasters used the Vertical Interval of the analog NTSC video signal for "Supervisory Control" to transmit information used to control equipment and

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December 16, 2010

WHAT YOU CAN DO ABOUT LIGHTNING STRIKES

Protecting a CCTV system and it components from lightning damage does not use the same methods used to protect human life from electrical shock. In fact many of the techniques used to protect humans from lightning also cause some other problems in the CCTV system.

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December 16, 2010

VIDEO PRE AND DE-EMPHASIS IN TRANSMISSION, WHY IS IT USED?

Video Pre-Emphasis and De-Emphasis is used with Frequency Modulation (FM) transmission systems. It is used to offset the triangular noise distribution created by FM transmission systems. FM Fiber, Satellite and microwave transmission systems exhibit this kind of triangular noise pattern.

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December 16, 2010

AUDIO VOLUME CONTROL IN THE DIGITAL AGE

The digital revolution has brought us new levels of entertainment and opportunity. But it also presents new challenges to overcome. Many of the problems that were once solved in analog transmissions have re-emerged as new problems in digital transmission.

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December 16, 2010

HDTV AND THE A / B SWITCH, WHATS YOUR BACKUP PLAN?

The arrival of HDTV has changed many of the ways things are done on the technical side of broadcasting. This new type of signal requires a broad range of new products and in many cases new methods of design and construction. A great deal of

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December 16, 2010

HOW TO BALANCE SECURITY AND PRIVACY

Everyone wants maximum security from their CCTV security system. And with today's wide range of high definition cameras and long duration video recording it is easier than ever to achieve a high degree of security observation and recording. Improvements in the pixel count of cameras

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December 16, 2010

HOW TO ADD PTZ TO A CAMERA WITHOUT RUNNING WIRES

If you need to get PTZ Pan Tilt and Zoom control to a camera without any easy way to run the wires out to it, or you want to add a PTZ camera and use the existing cables, this article will help you do just

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cctv ptz wireless ptz control

December 16, 2010

A NEW TECHNOLOGY FOR MEASURING STEREO CONTENT

An entirely new technology is described that accurately measures the stereo separation that resides within an audio program. This measurement is made with whatever complex waveforms happen to constitute the left and right channel. A computer cross-correlates the multiple frequencies, phases, and amplitudes comprising the