Sierra Video UPC-166 - Manual (Page 12)

1
UPC-166 Functional Description
Scaler Function
The scaler function provides up-conversion from standard SD formats. It
provides up-conversion to multiple frame rates, film frame rates, and
up-conversion to interlaced and progressive formats. Table 1-1 lists the UPC-
166 conversion choices available for various input formats and frame rates.
Table 1-1 Scaler Function Conversions
(film rates)
When output video is set to 720p, the 720p output can be converted to 720p
half-rate formats as listed in Table 1-1. When output video is set to 1080 film
(1080p23.98), the UPC-166 can convert the output to 1080PsF23.98
(segmented frame progressive).
The scaler function also provides aspect ratio conversion that provides a
choice from several standard aspect ratios. Additionally, user-defined and
“Follow AFD Settings” conversion can be applied. User defined settings
allow custom user-defined H and V aspect ratio control. “Follow AFD
Settings” sets the output aspect ratio to track with AFD (Active Format
Description) settings embedded in the received video signal.
Timecode Processor
(See Figure 1-2.) This function provides for extraction of timecode data from
the input video, and in turn re-insertion of timecode data into the output SDI.
In this manner, timecode data can be preserved, even after format conversion.
The function can monitor both the analog and SDI video inputs of the card for
supported timecode formats, and then select and prioritize among analog
VITC, SDI VITC, SDI ATC_VITC, and SDI ATC_LTC timecode sources. If
the preferred format is detected, the preferred format is used by the card; if the
preferred format is not detected, the card uses other formats (where available)
as desired.
The function also provides conversion between various timecode formats and
provides independent insertion and line number controls for each SDI
timecode output format.
1-8 UPC-166-OM
(V4.0)
Input
Format
SD
(NTSC/
PAL)
720p
720p
half-rate
720p
(film rates)
1080i 1080p
1080p
(film rates)
1080PsF
525i 59.94 525i 59.94 720p 59.94 720p 29.97 720p 23.98
(4)
1080i 59.94 1080p 29.97 1080p 23.98
(4)
1080PsF 23.98
(4)
625i 50 625i 50 720p 50 720p 25 X 1080i 50 1080p 25 X X
Notes: 1. The drop-down list choice of ―Same as Input‖ is used when no conversion is desired. For clarity, it is not redundantly listed here.
2. ―X‖ denotes conversions not available or invalid conversions.
3. Interlaced formats rates listed are field rates. Progressive format rates listed are frame rates.
4. If the original material does not have a proper 3-2 cadence suitable for conversion to film rates, the conversion reverts to standard
de-interlacing. While this video can be converted to film rates, the resulting image motion will lack smoothness. Therefore, make
certain interlaced video is appropriately constructed for 3-2 reverse pulldown when converting video to film rates. See 3-2
Pulldown Conversion and Considerations (p. 1-11).
5. ―NTSC‖ and ―PAL‖ in this manual informally denote 486i5994 and 575i50 SD-SDI video formats.