Dolby Laboratories Multichannel Audio Tool DP570 - Manual (Page 101)

Metadata Overview
Dolby ® DP570 Multichannel Audio Tool User’s Manual 85
There are two functional classifications of metadata:
Professional—These parameters are carried only in the Dolby E bitstream. They are used
to automatically configure a downstream Dolby Digital encoder, allowing maximum
control by the content producer over how the encoded bitstream is treated at each step on
the way to the consumer’s decoder.
Consumer—These parameters are carried in both the Dolby E and the Dolby Digital
bitstream. The consumer’s Dolby Digital decoder uses these parameters to create the best
possible audio program possible on each consumer’s playback system. Consumer
parameters include the DRC values, which are ultimately enabled by the end user’s
selection, as discussed in
Section D.3 .
Both types of metadata can be examined, modified, or passed through during encoding.
Table D‐1 lists the active metadata parameters and indicates whether the parameter is
Professional or Consumer.
Table D-1 Profession and Consumer Metadata Types
Metadata Parameter Professional Consumer
Program Configuration ×
Program Description Text ×
Dialogue Level ×
Channel Mode ×
LFE Channel ×
Bitstream Mode x
Line Mode Compression ×
RF Mode Compression ×
RF Overmodulation Protection ×
Center Downmix Level ×
Surround Downmix Level ×
Dolby Surround Mode ×
Audio Production Information ×
Mix Level ×
Room Type ×
Copyright Bit ×
Original Bitstream ×
Preferred Stereo Downmix a
a Extended Bitstream Information parameters are shown in italics.
×
Lt/Rt Center Downmix Level a ×
Lt/Rt Surround Downmix Level a ×
Lo/Ro Center Downmix Level a ×
Lo/Ro Surround Downmix Level a ×
Dolby Surround EX Mode a ×
A/D Converter Type a ×
DC Filter ×
Lowpass Filter ×
LFE Lowpass Filter ×
Surround 3 dB Attenuation ×
Surround Phase Shift Ч