C DX 5624 Reference Manual. Rev 2.0
Video Processing
Note. All digital signal processing and D/A conversion is 10 bit.
Video Proc Amp
A basic video proc amp is provided for video adjustments. This provides for adjustable Y
Gain / U Gain / V Gain / Black Level / Sharpness and Hue
Note.
Proc amp functions are preset to null. These parameters are adjustable via
the local controls or central control system. Please refer to page 18 for illustrations
of the available GUI controls
Aperture Correction and Color Space Conversion
Adjustable horizontal aperture correction is provided as well as selectable 709 > 601
color space (gamut) conversion. Color space conversion can be set to convert or
transparent modes. In transparent mode the color space is passed from the input to the
output.
Note.
Horizontal Aperture correction is factory preset for a flat frequency response
on the SDTV outputs. (The down conversion filtering process results in a slight roll
off in high frequencies). The amount of aperture correction applied is user
adjustable via the local controls or via the central control system. Please refer to
page 18 for illustrations of the available GUI controls.
All module settings are automatically stored in internal flash ram and will survive power
cycles and long term storage.
Note.
Settings will be written to flash RAM automatically after 10 seconds with no
activity. This can be observed by the alarm LED flashing yellow three times. If power
is removed before the settings have been stored the module will revert back to the
previous settings when powered up
Audio Processing
The module provides full audio support and will de-embed the complete audio payload
(8xAES) from the incoming SDI signal. This audio is delayed to match the video
processing delay (1 frame) and then re-embedded into the digital down converted
outputs.
Four of the de-embedded AES signals can be selected and output as external digital AES
signals (balanced AES3 signals on the SubD connector). Two additional AES signals can
be selected and output as balanced analog outputs via high quality 24 bit Audio D/A
converters. Full scale ranging, adjustable gain and de-emphasis is provided for each
analog audio output. Balanced analog audio outputs are provided on the integrated 25
pin SubD connector.
DolbyE
If the incoming SDI signal has an encoded DolbyE stream this will be de-embedded,
delayed one frame and re-embedded into the same channels on the down converted SDI
outputs. Providing the Dolby “Guard Band” was timed correctly on the input then the SDI
outputs will have the correct DolbyE audio timing and guard band timing will be
preserved.
Page 8 of 29
