Dolby Laboratories DP600 Stereo Receiver User Manual


  Open as PDF
of 6
 
DP600 Program Optimizer—Postproduction
1
Summary
The Dolby
®
DP600 Program Optimizer is an innovative and
flexible system offering intelligent file-based audio loudness
analysis and correction compatible with many of the broad-
cast and video-on-demand (VOD) media file formats in use
today. Expanding upon the technology developed for the
award-winning Dolby LM100 Broadcast Loudness Meter with
Dialogue Intelligence™, the Dolby DP600 enables cable and
IPTV broadcasters to automatically normalize the loudness of
all file-based programming and commercials without impact-
ing the original dynamic range.
1
For compressed audio formats that include metadata (Dolby E,
Dolby Digital, and Dolby Digital Plus, for example), the Dolby
DP600 can automatically set the dialnorm parameter and
automatically correct a previously set dialnorm parameter.
The DP600-C version additionally offers faster-than-real-time
file-based encoding and decoding of Dolby Digital, Dolby
Digital Plus, and Dolby E content, and enables transcoding be-
tween Dolby E and Dolby Digital or Dolby Digital Plus formats.
Taking advantage of the features of Dolby Digital Plus, the
DP600-C can perform high-quality, single-step transcoding
of Dolby Digital to Dolby Digital Plus without having to de-
code and reencode.
To ensure the highest possible work-flow integration and ef-
ficiency, the DP600 offers open access (via Web Services) to
Dolby’s unique audio processing engines as well as coding
technologies traditionally found only in real-time hardware.
For example, the DP600 feature set complements several
types of third-party applications and products, including the
following:
• Archiving
• Automation
• Content conversion
• Content transport
• Distribution
• Media asset management
• Production
1
In very rare cases involving extreme loudness corrections, “soft clipping” can occur.
Dolby DP600 and DP600-C Program Optimizer
Overview for Postproduction Facilities
Note: This document assumes the DP600 includes the optional file-based audio coding package.
A Quick Look Under the Hood
The DP600 includes a number of audio and media file processing engines for utilization in many applications,
as shown in Figure 1.
Media File Types Supported
• MPEG-2 Transport Stream
• MPEG-2 Program Stream
• GXF (SMPTE 360M)
• WAV and Broadcast WAV
• Dolby E
• Dolby Digital (AC-3)
• Dolby Digital Plus (E-AC-3)
Loudness Analysis and Correction
• Dolby E
• Dolby Digital
• MPEG-1 LII
• LPCM via WAV and Broadcast WAV
Direct Transcoding
• Dolby Digital to Dolby Digital Plus
Audio Encoders *
• Dolby E
• Dolby Digital
• Dolby Digital Plus
• MPEG-1 LII
Audio Decoders *
• Dolby E
• Dolby Digital
• Dolby Digital Plus
• MPEG-1 LII
* DP600-C only.
DP600 Processing Engines and
Supported Media File Types
Figure 1 DP600 Processing Engines and Supported Media File Types
next