| 摘要 |
A television signal processing apparatus comprises a source of system television synchronizing signals, an analog-to-digital converter for converting an input television signal to digital form, a digital-to-analog converter for converting the digital signal back to analog form, a plurality of digital television signal processors arranged in series between the analog-to-digital converter and the digital-to-analog converter, at least one of the signal processors being capable of frame synchronizing the digital television signal in dependence on a frame pulse supplied to the signal processor, and means associated with the digital-to-analog converter for producing a frame pulse and for feeding the frame pulse back to each of the signal processors, or at least to a signal processor capable of frame synchronizing the digital television signal and for synchronizing the produced frame pulse relative to the system television synchronizing signals. |
