Grass Valley Imagestore 750 v.3.0.1 - Manual (Page 36)

20
Applications
Agile Audio Handling
Three of a possible four audio module slots are used.
Example 2
In this example below, sources that feed the Imagestore 750 inputs will always be in one of three
possible audio formats:
• 5.1 PCM + 2.0 PCM
• 5.1 Dolby E + 2.0 PCM
• 2.0 PCM + 2.0 PCM.
The two input audio streams are passed into Dolby E decoders and 5.1 up-mix modules which
dynamically convert audio into a fixed format suitable for A/B mixing (5.1 PCM + 2.0 PCM). The
audio A/B mixer then transitions (fades or cuts) between the sources, and a voice-over can be
mixed into the output in the required configuration (5.1 PCM + 2.0 PCM).
Fig. 3-7: Agile Audio Handling - 2 Dolby Decodes and 2 UpMixes
All four audio module slots are used in this case
Station
Router
Dolby E
Decode
English 5.1 PCM
Spanish 2.0 PCM
A
B
English 5.1 Dolby E
Spanish 2.0 PCM
English 5.1 Dolby E
Spanish 2.0 PCM
Dolby E
Decode
A/B
Mix
VOs
5.1 Ch
Up-Mix
5.1 Ch
Up-Mix
English 2.0 PCM
Spanish 2.0 PCM