Dolby Laboratories Program Optimizer DP600 Bedienungsanleitung PDF herunterladen (Seite 5)

Dolby DP600 Program Optimizer: Postproduction

Technical Paper

For example, for coded audio data types that include metadata, such as Dolby Digital,

Dolby Digital Plus, Dolby Pulse, and Dolby E, the loudness normalization process

is achieved by automatically analyzing the audio bitstream and then comparing

this analysis with the stream’s metadata. If a mismatch is detected, the DP600 will

automatically correct the metadata values without having to decode and reencode the

audio stream (see Figure 4).

Figure 4 Coded Audio with Metadata Analysis and Correction

Analyzed and

Corrected File

Uncorrected File

Dolby DP600 Program Optimizer

Broadcast Media File with

Dolby E or Dolby Digital

Analyze Dolby Metadata

01101010011010100111001101110000

Broadcast Media File with

Dolby E or Dolby Digital

Audio Analysis

Update/Correct

Metadata

Audio Stream

and Metadata Are

Already OK

Error = 0?

Yes

The DP600 can also correct coded and linear audio data types that do not include

metadata, such as MPEG-1 LII and LPCM. For these audio data types, the loudness

normalization process is achieved by automatically analyzing the audio bitstream and

then comparing this analysis with a user-dened target loudness value. If a mismatch

is detected, the DP600 will automatically scale the loudness to match the target value

(see Figure 5).

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Dolby Laboratories Program Optimizer DP600 Bedienungsanleitung Seite 5