Crystal Vision
Introduction
SYNNER-E 3G User Manual R1.2
7
10/09/2012
The change also affects the values available on one other video delay. In "synchroniser" mode
delay (2) can have the values 0 or 0.5 frames. In "delay" mode, it can have the values 0,
"matched", and 1 frame where "matched" means that the video will be delayed by the
minimum needed for the lipsync to remain absolutely unchanged through the de-embed/embed
process. This is roughly 3ms.
The audio controls have the same effect in delay mode as in synchroniser mode.
Audio Delays
Two types of audio are considered – PCM and 'Dolby E'. The SYNNER-E 3G will
automatically detect Dolby E. There is a control to disable resampling of non-Dolby E data on
per-stereo basis.
The audio delay can be considered in six parts, although not all delays are available for all
types of audio.
(4)
A fixed audio delay of 0, 1, or 2 frames that matches the equivalent video delay. All types
of audio can go through this, selected on a per-stereo basis.
(5)
A continuously adjustable -20 to 80 ms delay. This delay can also change either by
resampling or by audio sample drop/repeat on a per-channel basis. The user control for
this can also select negative values; these will be provided by reducing delays elsewhere
in the signal path where possible.
(6)
A
T
racking
A
udio
D
elay (TAD) of between 0 and 1.5 frames that have the same value as
the video synchroniser delay plus the 0.5 frame video delay (i.e. this delay tracks the total
delay through (2)+(3). This delay can change either by resampling or by audio sample
drop/repeat, selected on a per-channel basis (using the same control as delay (5)).
(7)
A delay of 0 to 1 video frame that delays a Dolby E signal as required for the guardband
to be correctly aligned with the video timing. If the Dolby E channel is going through the
TAD then this block will align the Dolby E with the input video timing, if not it will be
aligned with the output video timing. Only Dolby E can go through this delay.
(8)
A -10 to +40 Dolby E samples adjustable delay in the Dolby E path. As the user control
for this can also select negative values; these will be provided by reducing delays
elsewhere in the signal path where possible.
(9)
A TAD of between 0 and 1 frame that has the same value as the video synchroniser delay.
This is for Dolby E only and drops/repeats frames at the same time as the video
synchroniser.
