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What To Look For In HDMI Leads
(High-Definition Multimedia Interface) is an audio video interface for transmitting uncompressed digital data between high definition devices such as HD DVD players, HD satellite boxes and HD televisions. It offers crystal clear, all-digital, audio and video signal in a single cable.
What to look for in a good HDMI lead:
The single most important factor to enhance quality on a HDMI lead is the level of shielding. A HDMI cable has nineteen internal wires, all these wires act like aerials picking up interference from other wires.
A fully shielded cable will have individual shielding for each of the internal wires and an outer shielding. This reduces crosstalk where the signals interfere with each other. The easiest way to assess the level of shielding in a cable is to look how thick it is and feel the weight, the more shielding a cable has the thicker and heavier it will be.
Ferrite EMI Suppressors are important for reducing electro magnetical interference, they are round barrel shaped coils usually found on either end of the cable.
Gold plated:
Gold plated cables can increase image quality, but only slightly. The main benefit of a gold plated cable is to reduce oxidization, as gold does not oxidize. This in turn reduces the chance of the signal quality deteriorating with age.
Length Maximum:
Basically the shorter the better, as previously mentioned, HDMI cables can act like aerials picking up interference, the longer the cable the more interference you will get.
A fully shielded 5m cable should be fine. Longer cables can cause the signal to break up and cause sparkles, this interference can be avoided by steering clear of cheap HDMI cables. But for longer distances you really need to invest in a top quality cable or consider using an HDMI amplifier to boost the signal.
How much to spend:
Like everything in life, you get what you pay for. It's pointless spending six hundred pounds on a television and three hundred pounds on a DVD player and then connecting the two with a three pound cable. If you only need the standard length of around 1.5M, then a good rule of thumb would be to spend around ten percent of your overall equipment budget on your cables. So if your television and DVD player cost a combined total of nine hundred pounds, you should be looking at spending ninety pounds on HDMI leads.
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