Dolby E Multichannel Distribution System User Manual | DP571 Dolby E Encoder |
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Metadata Source
Internal: Assigns factory default metadata values based on each Program within a Program Config; these values can still be modified (see Section 3.2.4 - Metadata Params).
Ext Override: Allows local modification of the external source’s metadata values.
External: Uses the external source’s Metadata without permitting local modification.
AC-3 Metadata
Disable: Does not include Dolby Digital metadata in the encoded Dolby E stream. Useful only if the decoded audio will never be Dolby Digital encoded.
Enable: This is the default setting that includes metadata in the Dolby E stream.
48kHz Pull Down
Disable: Default value appropriate for most common VTRs.
Enable: Allows a DP571 encoder to be used with a 30 Hz VTR operating at
29.97Hz. The < in the display below reflects that 48 kHz Pull Down is enabled.
Dolby E | < |
5.1 + 2 | 20bit |
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Frame Rate
Version 1.05 and later allows selection between two frame rates: 29.97 fps (NTSC) and 25 fps (PAL). Versions prior to 1.05 offer only 29.97 fps.
The Vref input rate must match the selected frame rate. For example, if the incoming Vref signal is 29.97 Hz/NTSC/black burst, the frame rate must be 29.97 fps, otherwise the Vref LED turns from green to yellow and encoding is disrupted.
The DP572 does not have a frame rate setting. The Vref input rate must match the frame rate of the incoming encoded stream to be properly decoded. For example, a DP572 that receives a 29.97 Hz Vref input will only decode a Dolby E stream encoded at 29.97 fps, otherwise the Vref LED turns from green to yellow and decoding is disrupted.
29.97fps: Default value for Dolby E output used with NTSC equipment.
25 fps: For Dolby E output used with PAL equipment.