A/B Roll Editing - Sony DFS-700 Service Manual

Control From the BVE-600

A/B Roll Editing

Signal flow
Player VCR A
DFS-700/700P
Background bus VIDEO
video INPUT
Foreground bus VIDEO
video
Player VCR B INPUT
T1 signal
Control signal
Control signal
Note
To improve editing accuracy, supply a reference sync signal to the BVE-600 and VCRs
from the BLACK BURST OUT connectors on the DFS-700/700P.
Signal flow in A/B roll editing
5-6
Chapter 5 Control From Editing Control Units
Recorder VCR
PGM OUT
T2 signal
Control signal
BVE-600
Timing of the trigger (T1/T2) signals
The timing of the trigger signals output by the BVE-600 is as follows.
VCRs start IN point Effect start point
Player A
Player B
Recorder
T1
T2
PGM OUT
Background bus image
signal
Preroll
A-roll period
Timing of trigger signals in A/B roll editing
OUT point VCRs stop
Foreground bus image
Effect
Postroll
execution
(transition)
B-roll period
5-7
Chapter 5 Control From Editing Control Units