| 摘要 |
<p>A sync stripper circuit (22) receives from a medical imaging modality a composite video signal with a horizontal sync frequency within one of first, second, third or fourth frequency ranges. The sync stripper circuit (22) includes a circuit (36), (38) for stripping the composite sync signal from the received signal; horizontal sync detection circuit (42) for detecting the horizontal sync signal from the stripped composite sync signal; a vertical sync detection (40) circuit for detecting the vertical sync signal; an F1/F2 field detection circuit (44) for detecting the F1/F2 field from the stripped composite sync signal; and a control circuit (46) for controlling the horizontal sync detection circuit (42), the vertical sync detection circuit (40) and the F1/F2 field detection circuit (44) to operate in the selected one of said first, second, third or fourth frequency ranges of the received composite video signal. A serrating signal circuit inserts a horizontal signal into the vertical sync signal if serrating signals are absent therein. <IMAGE> <IMAGE></p> |
