Specifications

Standards and Practices for Authoring Dolby
®
Digital and Dolby E Bitstreams
15
DP571 Dolby E Encoder
Dolby E Output
Mixed audio stems
to DP570
DP570 Multichannel Audio
Tool
Audio router output Metadata
Console
solo bus
(one frame delay)
00:00:00:00
Digital VTR
Video Sync
Emulator out to
amps/monitors
Figure 3 DP570/DP571 for Digital Television Distribution
The output of the DP571 is delayed one video frame from reference. Upon decode of
the Dolby E stream, the DP572 Dolby E Decoder adds another frame of delay from
the reference.
This configuration provides several key features.
1. The DP570 Multichannel Audio Tool provides the ability to monitor the effects of
metadata in real time, without the latencies (and expense) inherent in using a
Dolby Digital encoder and decoder in a back-to-back configuration. This allows
audio and picture to remain synchronous while selecting and previewing various
metadata parameter settings.
2. The software remote and GUI provide a simple and automatic procedure for the
measurement and selection of the dialnorm parameter. As dialnorm is the single
most important parameter in the metadata stream, this procedure eliminates the
guesswork in setting this important value.
3. The metadata selections made are automatically forwarded to the DP571 encoder,
limiting user input to a single, user-friendly device.
The solo bus within the console is still active and the DP570 provides dim and mute
functions for audio production. Additionally, the DP570 provides a GPI/O connector
for external control of key features within a console-driven hardware remote control.
This allows many controls within the DP570 to be located close to the engineer and
even integrated within the console itself.