Dolby Laboratories DP600 Stereo Receiver User Manual


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DP600 Program Optimizer—Postproduction
5
File-Based Encoding and Decoding
The DP600-C additionally offers direct access to Dolby tech-
nologies typically found in real-time hardware. These include:
• Dolby E
• Dolby Digital
• Dolby Digital Plus
These processes can be easily combined with each other or
with our intelligent loudness analysis and correction engine to
adapt to a wide range of content needs, including file-based
transcoding of content stored in Dolby E format to Dolby
Digital or Dolby Digital Plus.
The Dolby audio decoder engines generate a multichannel
and/or multiprogram Broadcast WAV file with a Dolby audio
metadata chunk. The audio encoder engines accept multi-
channel and/or multiprogram WAV files (including Broadcast
WAV and multichannel WAV formats) with or without a Dolby
audio metadata chunk.
File-Based Dolby Digital to Dolby Digital Plus Transcoder
The DP600-C supports a unique, quality-preserving Dolby
Digital to Dolby Digital Plus transcoder. This transcoding can
provide a simple migration path for next-generation services
utilizing existing file-based content. For example, VOD files
that currently include a multichannel Dolby Digital audio
elementary stream can be processed by the DP600-C to add a
Dolby Digital Plus audio elementary stream without having to
demux, decode, reencode, and remux the files.
Figure 5 Audio Analysis and Correction for Audio Types Without Metadata
Analyzed and
Corrected File
Uncorrected File
Broadcast Media or
Multichannel WAV File
Without Metadata
n channels
User-Defined Target Level
–(xx) dBFS
Analyze Digital Audio
Scale Loudness
Level
Audio Loudness
Already at Target
Level (No Correction
Needed)
Error = 0?
Yes
No
Broadcast Media or
Multichannel WAV File
Without Metadata
n channels
Dolby DP600 Program Optimizer
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