TRACKING SYSTEM
PURPOSE:To apply pilot signals to the recording of a narrow track and high density by recording the pilot signals different in frequencies in adjacent tracks into restricted tracking-only areas and deciding the track deviation of the rotary head with crosstalk from the adjacent tracks at the time of...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | PURPOSE:To apply pilot signals to the recording of a narrow track and high density by recording the pilot signals different in frequencies in adjacent tracks into restricted tracking-only areas and deciding the track deviation of the rotary head with crosstalk from the adjacent tracks at the time of reproduction. CONSTITUTION:Pilot singles f1 and f2 different in frequencies are alternately recorded in the recording areas (ATF part) of the pilot signals at every track, and the ATF areas of respective tracks are set to partially overlap with the ATF areas in the adjacent tracks. Since the pilot signal recording areas ATF are shifted in the longitudinal direction of the tracks, the crosstalk of the pilot signals from adjacent tracks on both sides are taken at mutually different timing. The other pilot signal is reproduced as crosstalk component from the adjacent tracks at first and second timings corresponding to the reproducing timing of the other pilot signal, and the direction and quantity of track deviation can be detected by the comparison of the reproduced levels. Thus, the pilot signals can be permitted to correspond to the recording of the narrow track and high density. |
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