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7800/7700 MultiFrame Manual
7812UDXD Series 3G/HD Up/Down/Cross Converter with Simultaneous Dual Format Outputs and AES I/O
6.31.2.4. Dolby Surround Mode
This control enables the user to author the surround mode of the Dolby stream. This parameter indicates
to a Dolby Digital decoding product that also contains a Dolby Pro Logic decoder (for example a 5.1-
channel amplifier), whether or not the two-channel encoded bit-stream contains a Dolby Surround (Lt/Rt)
program that requires Pro Logic decoding. Decoders can use this flag to automatically switch on Pro
Logic decoding as required.
Not Indicated
Not Dolby
Surround
Encoded
Dolby Surround
Encoded
6.31.2.5. Program Dialnorm Control
This control enables the user to author the Dialnorm Level of the Dolby bitstream. When received at the
consumer's Dolby Digital decoder, this parameter setting determines a level shift in the decoder that sets,
or normalizes, the average audio output of the decoder to a preset level. This aids in matching audio
volume between program sources. To adjust the Dialnorm Control, drag the slide right to increase the
value and left to decrease the value. The Dialnorm Control has a value range of –1 dBFS to –31 dBFS
in increments of 1 dBFS. The default value is -27 dBFS.
6.31.2.6. Audio Production Info
This control enables the user to author the Audio Production Information for the Dolby bitstream. This
parameter indicates whether the mixing level and room type values are valid. If Yes, then a receiver or
amplifier could use these values as described below. If No, then the values in these fields are invalid. In
practice, only high-end consumer equipment implements these features. Use the drop down to set this
control.
Does Not Exist
Exists
Page - 100
There is no indication either way.
The bitstream contains information that was not encoded in Dolby Surround.
The bitstream contains information that was encoded in Dolby Surround.
After Dolby Digital decoding, the bitstream is decoded using Pro Logic.
The bitstream contains information that was encoded in Dolby Surround.
After Dolby Digital decoding, the bitstream is decoded using Pro Logic.
Mixing Level and Room Type parameters are invalid and should be ignored.
Mixing Level and Room Type parameters are valid.
Revision 1.1.1
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