Page 12 / 60 Section 2. General description
Intra-pair skew: skew between the + and - wires within a differential wire pair (e.g.
Data2- and Data2+). It’s caused by different wire lengths or slightly
different wire construction (impedance mismatch) in HDMI cable. It
results in jitter.
Inter-pair skew: skew between two differential wire pairs in a cable. It’s caused by
different wire pair lengths or different number of twists in the HDMI
cable. Too much inter-pair skew results in color shift in the picture or
sync loss.
Jitter: signal instability in the time domain. The time difference between two
signal transitions should be a fixed value, but noise and other effects
cause variations.
Noise: electromagnetic interference between other electronic devices such as
mobile phones, motors, etc. and the HDMI cable are coupled onto the
signal. Too much noise results in increased jitter.
The Pixel Accurate Reclocking circuit completely regenerates the original video signal
and outputs a strong, high-quality digital signal that conforms to the HDMI specification.
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