
Expensive or cheap HDMI cable for long runs?
Will it make any difference if the quality of HDMI cable is excellent (the ones rated highly in home theater and stereophile kind of audio magazines) or average (usually available on internet or electronics shops)?
I understand that the signal is digital and so the dropped bits matter and also that the voltage differences that make 1 or 0 may get faint over long distances. When does this become significant ?
The screen size will be over 50 and picture will be usually 720p and at times 1080i or 1080p. I have to run a HDMI cable for about 10 metres and it'll carry only video signals.
I do keep reading that it's a scam but will it make a difference in 10 meter cable ?
As an engineer for products that use this type of transport, I can say that it really depends on the application. You indicate a application on the ragged edge of the transports capability. As the HDMI transport is a up to 5 differential TMDS layers with a discrete clock signal, the necessity for the transport to have good RF and EMI immunity is key, couple with that as it is a composite of TMDS (Transition Minimized Differential Signaling) layers the need for internal shielding for common mode coupled emissions.
I would challenge any one who uses the digital is digital argument to review the DDWG papers on DVI (granted not the same but it reveals the TMDS layer susceptibility to RF and EMI interference and self emissions.
Your best bet is look at 10% of total system cost for cables. This will prevent overbuying for performance. Most performance cables have a satisfaction guarantee, I would recommend that you try both and decide for yourself. Those here will argue till blue in the face, but remember you are the one that needs to be happy with it.
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