Cable Forum - View Single Post - The HDMI cable that comes with V+, is this sufficient?

higgsfield · 12-03-2009, 10:38

This is not strictly true. At very fast data rates, the digital waveforms are not "perfect" and complex clock and data recovery (and error correction) circuitry is used to reconstruct the original bits.

If the digital signal is sufficiently noisy then errors can be introduced. This "noise" can take many forms (jitter, cross-talk, attenuation).

It is however interesting that none of the expensive cable manufacturers use quantative data to specify their products. i.e. what is the bit-error rate of a bog-standard 1m 1.3a HDMI cable Vs. their super-dooper variety.

It's also important to understand how any bit-errors might manifest themselves. With analog signals, degradation is apparent as ghosting, snow, etc... With digital you are more likely to see the picture "freeze" or break up. Much more catastrophic failures!

12-03-2009, 10:38	#13
higgsfield Inactive Join Date: Feb 2008 Location: London, England Posts: 296	Re: The HDMI cable that comes with V+, is this sufficient? This is not strictly true. At very fast data rates, the digital waveforms are not "perfect" and complex clock and data recovery (and error correction) circuitry is used to reconstruct the original bits. If the digital signal is sufficiently noisy then errors can be introduced. This "noise" can take many forms (jitter, cross-talk, attenuation). It is however interesting that none of the expensive cable manufacturers use quantative data to specify their products. i.e. what is the bit-error rate of a bog-standard 1m 1.3a HDMI cable Vs. their super-dooper variety. It's also important to understand how any bit-errors might manifest themselves. With analog signals, degradation is apparent as ghosting, snow, etc... With digital you are more likely to see the picture "freeze" or break up. Much more catastrophic failures!