Ensemble Designs 5470 Digital Processing Amplifier and Legalizer User Manual
Page 13
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Luma – the luma channel can be adjusted independently of the chroma channel for
noise reduction and motion threshold while in any of the Motion Adaptive
Recursive modes. These controls are best set using a waveform monitor and setting
the Show Noise function in the Bypass menu below.
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Chroma – the noise reduction and threshold of the chroma channel can be
adjusted independently of the luma channel with these controls. A Luma Tie
setting is provided that controls the chroma filter based on the motion estimation
on the luma channel. Not only is noise more effectively reduced when this control is
active, but it can also reduce the appearance of cross-color artifacts from poor
upstream decoding of composite signals.
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Bypass – set the DNR output mode in conjunction with the Output menu Bypass
function with this control. You may use this control to view the desired DNR output
for comparing noise reduction or detail enhancement. Refer to the Output menu
for details on setting this mode.
The Filters menu shown below allows setting the luminance and chroma sharpness and
horizontal bandwidth (with DNR option) with the following detail enhancing controls:
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Lum Sharp – set to Off to bypass detail enhancing filters. Set to Off , 1/4, 1/2, or
Max to set the sharpness of the luminance portion of the signal.
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Chr Sharp – set to Off to bypass detail enhancing filters. Set to Off, 1/2, 1/4, or
Max to set the sharpness of the chrominance portion of the signal.
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Lum Bandwidth – used only when the 5475 DNR (Digital Noise Reduction)
option is installed. Set to Normal to allow full bandwidth (no effect), or 3/4 Band,
1/2 Band, or 1/4 Band.
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Chr Bandwidth – used only when the 5475 DNR (Digital Noise Reduction) option
is installed. Set to Normal to allow full bandwidth (no effect), or 3/4 Band,
or 1/2 Band..
These bandwidth functions utilize filtering applying a sharp cutoff low-pass filter
to effectively remove high frequency and impulse noise. This is especially useful in
applications such as an MPEG pre-processor to reduce bandwidth required to
transmit an MPEG-encoded signal. The result can be a cost effective method of
delivering video via satellite link.
5470/5475-13
Model 5470 Digital Proc Amp and Model 5475 DNR