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1.
OVERVIEW
The 7714HDC High Quality Down Converter provides high quality down conversion of your high definition
(SMPTE 292M) signals to standard definition (SMPTE 259M) with detail enhancement and gamma
correction. The 7714HDC has up to 4 SD Serial Digital outputs and up to 2 composite analog video
outputs. Of the 4 outputs, 2 have OSD output. There is also an external genlock input.
The module accepts 2 groups of embedded audio on the input and re-embeds them into the serial video
outputs. It also accepts 4 discrete unbalanced AES inputs and provides 4 AES outputs with the same
audio that is being embedded. The re-embedded audio normally has the appropriate delay added to
compensate for video delay incurred by the conversion process, thus avoiding the need for external de-
embedding and re-embedding of audio. An additional audio delay adjustment can also be made for lip
sync correction.
The unit also transfers the closed caption and time code information from input to output performing all
necessary HD to SD translation and time code recalculations.
The units occupy one card slot in the 3 RU frame, which will hold up to 14 modules or one slot in the 1RU
frame, which will hold up to three modules.
The units also provide card edge LEDs to indicate signal present, genlock present and audio groups
present.
Features:
•
High quality HD -> SD down conversion with Image enhancement
•
Supports standard aspect ratio conversions plus all user definable
•
Support all necessary colour space conversions (ITU rec. 601 to ITU rec.709)
•
Full video processing functions, GBR gain YCrCb gain and offset, hue adjustment and RGB colour
limiter
•
Image Detail Enhancement with RGB gamma correction
•
Reference input allows for phasing of output video
•
Module supports min. delay or variable delay for video output without reference
•
Module supports video output referenced to genlock with variable delay
•
Output on screen display used to configure the operating modes
•
De-embeds Audio from HD video input and embeds into SD video output (2 groups)
•
Supports 4 retimed external AES inputs and outputs
•
Moves RP-188 VITC and LTC from HD input to SD output, recalculated for frame rate changes
•
Moves HD closed captions from HD input to SD output.
7714HDC High Quality Down Converter
Revision 1.1
7700 MultiFrame Manual
7714HDC - 1
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