Video track control data handling - using frequency modulation in FM channel for triggering recorder functions
Lower cost and greater reliability of recording and reproducing control data in video tracks of video recorders are ensured by sensing the frequency of the modulator. Data of FM channels are delivered through a filter and then subject to conversion for tripping the corresp. function of the video pla...
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| Format: | Patent |
| Sprache: | eng ; ger |
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| Zusammenfassung: | Lower cost and greater reliability of recording and reproducing control data in video tracks of video recorders are ensured by sensing the frequency of the modulator. Data of FM channels are delivered through a filter and then subject to conversion for tripping the corresp. function of the video player. The frequency scan covers two image frames and the scan covers a range of 3.8 to 5.1 MHz. The control data during replay are obtained by short period switching of recording and scanning circuits with erase head remaining turned-off. |
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