TANDBERG EN8000, Справочное руководство

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Introduction to the Basic Encoder
Page 1-6 Reference Guide: EN8000 MPEG-4 Part 10 (H.264/AVC) Encoders
ST.RE.E10233.1
Output on Video Loss
In the event of video input loss the Encoder can be software-configured to show either:
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A test pattern (with or without identification text).
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A freeze frame (with or without identification text).
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Cut to a black screen (with or without identification text).
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Drop the video PID if TS encapsulation is active.
1.3.2 HD Video Input (EN8090 Encoder)
The only operational video input is:
•
HD-SDI (so named on the back panel) - High Definition Serial Digital Interface that is
compliant to SMPTE 292M.
Video Input Types
The video input frame rate and resolution is user selectable and the available options are
shown in Table 1.3.
Table 1.3: Supported High Definition Scanning Modes
Resolution (V x H) P / I Frame rate Carried as: Standard
720 x 1280 Progressive 50.00 frame/s Native SMPTE296M
720 x 1280 Progressive 59.94 frame/s Native SMPTE296M
1080 x 1920 Interlaced 25.00 frame/s Native SMPTE274M
1080 x 1920 Interlaced 29.97 frame/s Native SMPTE274M
Video Pre-processing
The efficiency of the encoding can be enhanced through pre-processing of the incoming video
using functions such as:
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Support for reduced horizontal resolution on the encoded video relative to the input video
to reduce the macro-block rate such as resizing from 1920 pixels to 960 pixels for 1080-
line resolution and resizing from 1280 pixels to 640 pixels for 720-line resolution.
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A downsampler.
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An internal frame synchroniser.
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The aspect ratio for the incoming video feed as defined in the VBI, can be maintained in
the output if desired.
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Generation of test patterns to allow the overall system to be tested.
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Replacement of the video stream when input is lost.
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Built-in patented adaptive noise reduction circuitry
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Noise reduction is only available when software option EN8000/SWO/NR is purchased.