Pixel Accurate Reclocking - Lightware UMX4x4-Pro User Manual

unprotected content
Note 1: If a source detects that the input port is HDCP disabled, it will send only unprotected
content.
Note 2: If a source detects that the input port is HDCP enabled, it could send protected or
unprotected contents as well.
Note 3: HDCP protected content will not be sent to any input port with disabled HDCP setting.
Note 4: HDCP protected content will never be sent to a non HDCP compliant display.
Please note that if HDCP capability is disabled on an input port, the connected source
cannot send protected content to any display. If HDCP function is enabled on an input port
and the source sends encrypted signal, the non-HDCP compliant devices cannot display
the video. This new feature does not remove the encryption of an encrypted signal, and
does not void HDCP standard at all.
2.7.

Pixel Accurate Reclocking

Signal reclocking is an essential important procedure in digital signal transmission. After
passing the reclocking circuit, the signal becomes stable and jitter-free, and can be
transmitted over more equipment like processors, or event controllers. Without reclocking,
sparkles, noise and jaggies can be seen on the image.
Lightware's sophisticated Pixel Accurate Reclocking technology fixes more problems than
general TMDS reclocking. It removes not only intra-pair skew but inter-pair skew as well.
The Pixel Accurate Reclocking circuit eliminates the following errors:
Intra-pair skew: skew between the + and - wires within a differential wire pair (e.g. Data2-
Section 2. General description
note 1
HDCP disabled
Non HDCP display
note 4
and Data2+). It's caused by different wire lengths or slightly different wire
construction (impedance mismatch) in HDMI cable. It results in jitter.
protected content
HDCP enabled
input port
input port
HDCP compliant display
UMX4x4-Pro
User's Manual
note 2
protected content
HDCP disabled
input port
encrypted signal
non encrypted signal
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note 3