Specifications

Standards and Practices for Authoring Dolby
®
Digital and Dolby E Bitstreams
14
MetaData Sw
Stream Select
Metadata
Dolby E
or
stereo audio
Video
CH 1&2 or stereo
CH 3&4
CH 5&6
B Flag
6-channel (5.1)
or
stereo audio
Metadata
A Flag
Video
Dolby Digital
encoded audio
DP569 Dolby Digital
Encoder
Dual DP572
Dolby E Decoders
6-channel (5.1)
or
stereo audio
DVP
DAP
DAP
DAP
To router In
DP570 Multichannel Audio
Too l
Monitoring system
Sources
Metadata
B
B
A
B
Ven us 2001
PHILIPS
Figure 2 Multichannel Monitoring in Master Control for Digital Television
This block diagram shows a simplified master control switch between two sources.
Prior to entering master control, the incoming Dolby E streams are decoded back to
baseband PCM audio. The metadata for each incoming Dolby E stream is sent
through a serial metadata switcher whose output feeds a downstream DP569 Dolby
Digital Encoder for transmission, as well as a DP570 Multichannel Audio Tool in the
monitor chain. The DP570 controls the monitoring environment and receives the
appropriate audio feeds from either of the two sources in this example.
5.2 DP570/DP571 for Digital Television Distribution
The preferred method of selecting, previewing, and authoring metadata for inclusion
within a Dolby E data stream is through the use of the DP570 Multichannel Audio
Tool paired with the DP571 Dolby E Encoder. This configuration uses the DP570 for
both the monitoring and authoring functions of metadata, and frees the DP571 to
simply encode the audio and create the resulting Dolby E data stream with the
selected metadata parameters.