Hdmi Cables - The Usable Signal

Through using HDMI cables, the uncompressed audio/video digital data is transmitted to a more compressed functional signal

. For clarification, the letters of HDMI stand for High-Definition Multimedia Interface which is the digital version of the well-known RGB analogue signal. The colours red, green and blue produce white light when RGB is created. Having various audio/video digital sources like an Xbox 360 or a Blu-ray disk player connected with this cable allows the picture to flawlessly project on an output device such as a digital television.

With the ability to produce signals of a broad range, the quality that is able to be sent through an HDMI cable is vast. The cable can produce a small scale of picture information with 480i to a large scale up to 2160p. The great quality about the cables is that there is no limit in length that is available. The only determining quality with length is the construction and quality of the cable. The longer the cables become, the lower quality they will provide. However, a cable of 49 feet can produce a perfectly usable signal.

When looking into the inner workings of HDMI cables, it is easy to become confused. The transmission produced is much like that of a CAT5 cable. Yet, there is more shield to create a better quality product. The data is carried on four shielded twisted pairs that transmit the sync pulses, colour and clock signal. The information about where the frame is to begin is sent by the Sync pulses. When the colours come together in a neat unified picture, the RGB signal is doing its best work. Transmitted energy carries the clock signal information through the cable to the output location. All of this is joined with an 8-channel digital audio to produce the ultimate audio/visual experience.

These cables are very multifaceted. All of the pairs of wires and their shapes and sizes effect the transmission of the picture. One must keep this aspect in mind when trying to purchase HDMI cables. A different effect will be given to each cable because of the thickness of insulation within wires. There are many cables offered, but carefully determining the features and benefits of each will expedite the process. When terms such as high speed and gold plated or Full HD are becoming the HDMI cable norm, it is a good idea to understand and consider all of the options before purchasing cables.

by: Jay Smyth

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