hdtv cable adapter
The Down-low behind Composite Cables
Before being combined with sound signals and transformed onto an RF carrier, composite video format is used only with the picture of analog television. Composite video format in actual practice is an amalgamation of three source signals known as Y, U and V or YUV along with sync pulses. Y signifies brightness of the picture and contains orchestrated pulses, so that they can be exhibited as monochrome picture. U and V demonstrate hue and saturation or chrominance and transmit the color information. In other words, we can say that component video is that video signal which has been split into two or more workings. In an effort to compress the entire component video information into one signal for the broadcast National Television Standards Committee or (NTSC) it has been re-defined as a composite video signal. Now-a-days, composite video cables are being used everywhere excluding HDTV, which comes through the coaxial cable from the cable TV supplier. The yellow “video” jacks which are on the back of your VCR, DVD player or laserdisc player all contain composite video output. Thus signal clarity can be achieved by separating the components of a video signal without any interference from each other. The separation of signal through this way is called ‘component video’. RGB, S-video and YPbPr signals consist of two or more separate signals and are called component video signals, which are being carried out by component video cables.
For example, if your DVD player contains component video output and your TV or projector support component video signals, it is advised to use it. DVD players having this type of output contain three RCA jacks which come in green, blue and red. They are called Y, B-Y, R-Y or Y, Pb, Pr or Y: Cb. Cr. If your TV or projector has the same RCA jacks you can connect the same with a three wire component video cable ensuring all the colors match both the ends. In this case three standard composite video cables can also be used.
Component video cables are known for providing superior color accuracy coupled with sharper picture detail than RF Coaxial video cables. Component video can be differentiated with composite video viz., NTSC, PAL or SECAM through its assistance all the video information is combined into a single line-level signal. Akin to composite, component video cables do not transmit audio and are frequently paired with audio cables.
Generally, a projector takes component video through a VGA port most probably a 15-pin D Sub just like the output ports on a PC. In these circumstances you will require composite video cables having three RCA jacks for DVD player along with a 15-pin D Sub VGA connector at the other end.
Buying tips: Composite Cables
• While buying DVD player look for DVD players having “composite video” and not DVD players which comes with output containing “component-interlaced’.
• Choose a composite video cable having a 75 ohm coax engineered for low attenuation.
• If you intend to use composite cables on a regular basis choose multi-stranded and more flexible composite video cables.
About the Author
Sophie Milch currently manages purchasing and inventory control for Comnauts.com. Sophie keeps herself busy by making sure our inventory is filled with quality products, the latest and the greatest. Sophie holds a B.Sc. in Mathematics from the University of Waterloo and is frequent contributor to several technology blogs and magazines. When she’s not working; in typical nerd fashion you can catch Sophie twittering friends, beating down Murlocs in World of Warcraft and watching re-runs of the X-files.
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