| 摘要 |
<p>A system and method are provided for combining multiple composite video signals into a single output data stream synchronised with an output device. An analogue to digital converter (ADC) (25) is arranged to convert incoming composite video signals into digital form, a digital memory (80) is arranged to receive the digital output of the ADC, and a decoder (15) is provided to sample the contents of this memory (80) under the control of timing signals (110,130) synchronised with the output device to develop synchronised digital samples (180) relating to the incoming composite video signals. These digital samples are then transferred to the multiplexor (140) to enable the multiplexor to develop the single output data stream (160). <IMAGE></p> |
