Overview - evertz 7800 Manual

1.

OVERVIEW

The 7812DCDA2Q-HD series are high density, dual path down-converters with integrated distribution
amplifiers. With these modules, two simultaneous HD to SD down-conversions may be performed on two
different HD input signals. Each processing path provides re-clocked HD-SDI outputs in addition to down-
converted SD program outputs. The SD program outputs may be software configured to output either SD-
SDI (SMPTE 259M) or NTSC/PAL signals. Composite outputs may be color frame locked to a supplied bi-
level black reference signal (one reference per card). One of the re-clocked HD-SDI outputs may be re-
purposed to provide this external GENLOCK input. Alternatively, these cards can be configured to accept
GENLOCK from the 7800FR FRAME REFERENCE input.
The 7812DCDA2Q-HD series accepts all popular SMPTE 292M video formats. To deliver high quality and
sharp SD output signals, these modules incorporate Evertz's proprietary scaling technology. These cards
also support YUV/RGB based video proc (gain and offset), RGB color legalization and video gamma
correction capabilities.
Embedded audio from incoming video signals (16 channels) is de-embedded and re-embedded into the
SD program outputs with audio delay matching video processing delay. Full audio proc including
gain/delay/invert and channel swapping is supported. In addition, 5.1 PCM to stereo (Lt/Rt or Lo/Ro) down
mixing is supported. With the 7812DCDA2Q-HD-AA, 4x analog audio outputs are available for each
processing path. With the 7812DCDA2Q-HD-AES4, 2x AES outputs are available for each processing
path.
When converting HD to SD, the 7812DCDA2Q-HD series transport closed caption and time code
information from input to output with all necessary HD to SD translations and time code recalculations
taking place. These modules support color space conversion from ITU rec. 709 to ITU rec. 601, and offer
standard as well as user defined aspect ratio conversions. They also support automatic AFD based
steering of aspect ratio conversions based on incoming AFD metadata and can stamp AFD signals on the
output video. AFD driven transitions between particular ARC modes are frame accurate and glitch free.
Feature of the 7812DCDA2Q-HD (-AA, -AES4) are as follows:
Dual channel HD to SD down-conversions
Re-clocked HD-SDI outputs in addition SD PGM outputs
SD PGM outputs can be SD-SDI or NSTC/PAL (software selectable)
Composite outputs can be color frame locked to a supplied bi-level black reference signal
Support for external card reference and 7800FR FRAME REF reference inputs
Support for popular SMPTE 292M input video formats
Evertz proprietary scaling technology
Full video proc functions including GBR/YCrCb gain/offset and RGB color legalizer
Video gamma correction controls
HD to SD color space conversions (ITU Rec 709 to ITU Rec 601)
Full support for standard and user defined aspect ratio conversions
Fully AFD enabled for automatic and glitch free aspect ratio conversions based on AFD metadata
Support for 16 channels embedded audio in and out
De-embeds audio from HD input and re-embeds into SD output
Embedded audio delay tracks video processing delay
Full audio proc including gain, delay, invert and channel swapping
7812DCDA2Q-HD (-AA, –AES4) Dual Path HDTV Down-converter
Revision 1.0
7800 MultiFrame Manual
Page 1