Grass Valley Imagestore 750 v.2.0.1 - Manual (Page 375)

Imagestore 750 User Manual Dolby Decode/Encode
Miranda Technologies Inc. Page 375
System Delays
Dolby Delays
As already stated on page 352, Dolby decoding and encoding takes time to
perform. The table below lists the audio delay incurred (in video frames) for
various Dolby decode/encode use cases:
System Encode/Decode Case
Delay
(Frames)
Total
(Frames)
1a Single E encode 1 1
2a Single Digital encode 6 6
3a A/B E decode 1 1
4a A/B E decode + 1 E encode 1 + 1 2
5a A/B E decode + 1 Digital encode 1 + 6 7
The table below lists the corresponding delay required in the video path, after
the keying stages for the cases when DVE is out-of-circuit, and DVE is in-
circuit.
Video Delay
System Encode/Decode Case
Audio
Delay
No DVE DVE
1a Single E encode 1 1 0
2a Single Digital encode 6 6 5
3a A/B E decode 1 1 0
4a A/B E decode + 1 E encode 2 2 1
5a A/B E decode + 1 Digital encode 7 7 6