Appendix B: Achieving Frame Accuracy in a Non-Frame Accurate World
Keeping video signals synchronized is a time-honored process. Ideally, all routed video signals in a facility are raster time-aligned horizontally and vertically and with a known frame time code. The basic method used to synchronize a target video signal is to apply a correcting time shift and thereby align it with a provided master reference signal. In most cases, the vertical and horizontal timing of the target signal is altered to agree with the provided video house reference. There is usually a one or more frame delay (input to output delay of corrector) to accomplish the time alignment.
It is not difficult to imagine how this process works. The input signal needing correction ...
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