Ross HDC-8222A, Руководство пользователя

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HDC-8222A User Manual (Iss. 02) Introduction • 1–3
Available Format Conversions
The HDC-8222A has extensive re-format and down conversion capabilities. It can act as a
down-converter, Aspect Ratio Converter (ARC), and frame rate converter. The format
conversions are listed in
Table 1.1 .
Notes:
Note the following when calculating format conversions:
• An interlaced video format (i) contains two fields per frame, but the frame rate
designation for that video format is actually the field rate. For example;
› 1080i 59.94Hz is 29.97 frames per second. There are two fields per frame, thus the
interlaced frame rate is 59.94Hz.
› 1080p 29.97Hz is 29.97 frames per second.
• SD active line rates are PAL (575) and NTSC (486).
• The HDC-8222A cannot accept native 720p 23.98Hz or 720pSF 23.98Hz; however it can
convert those signals if they are delivered inside a 720p 59.94Hz transportation wrapper
(as typically done with this format) and processed as 720p 59.94Hz.
Table 1.1 Supported Format Conversions
From HD to SD
1080pSF 23.98Hz 480i 59.94Hz
1080p 29.97Hz 480i 59.94Hz
1080p 50Hz 576i 50Hz
1080p 23.98Hz 480i 59.94Hz
1080i 59.94Hz 480i 59.94Hz
1080i 25Hz 576i 50Hz
720p 25Hz 576i 50Hz
720p 29.97Hz 480i 59.94Hz
720p 50Hz 576i 50Hz
720p 59.94Hz 480i 59.94Hzz
480i 59.94Hz 480i 59.94Hz
576i 50Hz 576i 50Hz