A common misconception is that pictures can be improved […]
A common misconception is that pictures can be improved by the use of expensive HDMI cable. This is not true.
HDMI is a digital format. Digital data is send along the HDMI cable to be decoded at the other end. If data is received by an HDTV an image will be displayed (and sound reproduced, picture formats identified, copy protection activated, and so on). If data is not received, no image will be displayed. If data is corrupted, error correction circuitry will attempt to reconstruct the data and make it meaningful, resulting either in the original picture, or no picture at all. At no point in this process is the HDMI cable able to present the TV with data that will produce a 'better' image.
In general, however, an expensive HDMI cable will be of better quality than a cheaper one. An expensive cable should have been constructed using high quality materials with better copper for lower resistance, with gold plating on terminals to reduce corrosion, with better insulating materials and with better screening to reduce interference. It's quality will have been monitored throughout the construction process to eliminate faults as much as possible.
The cheapest cables will not have been subject to such vigorous testing and lower quality materials may have been used. Such cables may have a high failure rate and may be prone to deterioration over time.
Most HDMI cables will be located somewhere between these two extremes. So paying a higher price can be justified, as long as you don't expect a better picture. HDMI cables - fuucable.com provides Cheap and nice for you.