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How CCTV Protects? Tech Focus 11


Closed Circuit Television (CCTV) is now common in commercial establishments, banks , home etc to monitor the premises for discouraging theft by recording the criminal activity. The system uses a video camera to transmit the signals to a specific place on a set of monitors. The signal is not transmitted open but transmitted to limited points through short range transmission. The receiver is connected to a TV. In wired system, RF cables are used to connect the camera directly to the TV. The Digital Video Recorders (DVRs) provide recording facility continuously with extra features like motion detection. The IP based CCTV has mega pixel sensors help to record the data directly to network attached storage devices for completely stand alone operation. High Definition CCTV (HD CCTV) system is now available to identify and track the objects in their field of view.

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computer, Electronics, Home, Internet, Mobilephone, Techniques, Technology, Television

Digital TV Technology


In contrast to the ordinary TV, Digital TV or DTV uses the transmission in Digital format. Digital TV supports various types of picture formats of different combination size and interlacing. The digital format may be High Definition TV (HDTV) or Standard Definition TV (SDTV). HDTV transmission is in p720 (720 Progressive scanning) or i1080 (1080 interlace). Both use the 16:9 Aspect ratios. HDTV format cannot be transmitted through analog channels. SDTV on the other hand uses different formats based on different aspect ratio.

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computer, Electronics, Home, Internet, Mobilephone, Techniques, Technology, Television

Digital TV Technology


In contrast to the ordinary TV, Digital TV or DTV uses the transmission in Digital format. Digital TV supports various types of picture formats of different combination size and interlacing. The digital format may be High Definition TV (HDTV) or Standard Definition TV (SDTV). HDTV transmission is in p720 (720 Progressive scanning) or i1080 (1080 interlace). Both use the 16:9 Aspect ratios. HDTV format cannot be transmitted through analog channels. SDTV on the other hand uses different formats based on different aspect ratio.

Continue reading “Digital TV Technology”