Grass Valley Imagestore 750 v.3.0.1 - Manual (Page 163)

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Imagestore 750
User Manual
The following table shows the PGM delays required for the above Dolby use cases when DVE
processing is required on an interlaced video standard:
The following table shows the PGM delays required for the above Dolby use cases when DVE
processing is required on a progressive video standard:
Note: In rows 1 and 3 of the preceding table, the video delay fo in-stream branding exceeds the
audio delay for Dolby processing. Additional PCM audio delays must therefore be added so lip
sync is maintained.
When an Imagestore 750 is configured for in-stream branding insertion, approximately 6 frames
of ‘PGM post A/B-mix’ delay must be applied to PGM video to compensate for the the extra
video delay that will be incurred. The following table shows the PGM delays required for the
above Dolby use cases when in-stream branding insertion is required:
Decode Encode
PGM Audio Delay
PGM Video Delay—DVE
(Interlaced)
Dolby PCM Post A/B-Mix Output
— Dolby E 1 — 1 0
— Dolby Digital 6 — 1 5
Dolby E — 1 — 1 0
Dolby E Dolby E 2 — 1 1
Dolby E Dolby Digital 7 — 1 6
Table 6-10: PGM delays for Dolby cases, with DVE for interlaced video standard
Decode Encode
PGM Audio Delay
PGM Video Delay—DVE
(Progressive)
Dolby PCM Post A/B-Mix Output
— Dolby E 1 1 2 0
— Dolby Digital 6 — 2 4
Dolby E — 1 1 2 0
Dolby E Dolby E 2 — 2 0
Dolby E Dolby Digital 7 — 2 5
Table 6-11: PGM delays for Dolby cases, with DVE for progressive video standard
Decode Encode
PGM Audio Delay
PGM Video Delay—In-
Stream Branding
Dolby PCM Post A/B-Mix Output
— Dolby E 1 5 6 0
— Dolby Digital 6 — 6 0
Dolby E — 1 5 6 0
Table 6-12: PGM delays for Dolby cases, in-stream branding