V6402, V6404, V6406, V6408
and V6418 HD converters
HU-V6402&4&6&8&18
45
3.4
Video Processing Amplifier
3.4.1
Video Gain
PROC AMP
V Gain
The adjustment range is
±
6dB and it applies equally to the luminance and both of the chrominance
channels (Cb and Cr). The gain is applied after the black level offset. The Video gain is applied
simultaneously with the Chrominance gain so they can cancel one another out. For e3dB of
Video gain along with –3dB of Chroma gain will result in the luminance being increased by +3dB and the
Cb and Cr channels being unchanged.
The output is limited to ensure that there is no numerical overflow as the output fits into the 10 bit D1
domain. There is no gamut legalisation function.
3.4.2
Chroma Gain
PROC AMP
C Gain
The adjustment range is
±
6dB and it applies equally both the chrominance channels. The gain is applied
along with the video gain and after the black level offset. The Chrominance gain is applied simultaneously
with the Video gain so they can cancel one another out. For e3dB of Video gain along with –3dB
of Chroma gain will result in the luminance being increased by +3dB and the Cb and Cr channels being
unchanged.
The output is limited to ensure that there is no numerical overflow as the output fits into the 10 bit D1
domain. There is no gamut legalisation function.
3.4.3
Black Level
PROC AMP
Blk Lvl
The adjustment range is –127 and +128 D1 levels (equivalent to -101/+102mV). The black level
adjustment is applied before the gain stages. This is considered the best arrangement since the unit is
usually used to correct incoming errors.
3.4.4
Hue Shift
PROC AMP
Hue
The adjustment range of the hue shift is
±
45
°
in 0.35
°
steps.
3.4.5
Dynamic Rounding
PROC AMP
Dyn Rnd
Since some quantising effects may be visible on the output of this unit when variable gains are applied,
Dynamic Rounding has been applied. This Dynamic Rounding is only used to reduce the effects of the
fractional bits of lower significance than the normal 10 bits; it does
not
reduce the resolution to 8 bits.
This can be disabled on the
PROC AMP
:
Dyn Rnd
menu.
V6406VP
V6408VP
V6418VP
V6404VP
V6402VP
