| 摘要 |
A video production facility has a switching matrix for video signals that serves both as the usual studio switching matrix for video signals interposed between video signal sources and video signal destinations and also provides the necessary switching for supplying signals to a mixer and for directing the outputs of the mixer to their destinations. The signals to be mixed are directed to the outputs of the switching system that are connected to the mixer inputs. The switching system is subdivided into a first switch matrix for standard composite television signals, a second switch matrix for analog component television signals and a third switching matrix for digital video signals. Coders and decoders are provided for interconnecting the first and second switching matricies and analog-to-digital and digital-to-analog converters for interconnecting the second and third. The mixer is operated on a digital basis, and a control unit control the operation of the mixer and of the rest of the switching system.
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