| 摘要 |
<p>The extraction circuit is used for the horizontal identification signal in a SECAM television receiver, video unit etc. It employs frequency selectros (8, 9), which direct the signal appearing during the line scanning period partially to a store (SpI) associated with the preceding line and to a store (SpII) associated with the following line. The identification signal is separated from the rest of the input signal by an identification gating circuit (3), coupled to an identification-killer detector (11). The frequency selectors (,, 9) are coupled to the line between them and the stores (SpI, SpII) coupled to the identification-killer detector (11).</p> |
