Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1993-02-26
1994-06-07
Young, W. R.
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369 4426, 369 4434, 369 4435, 369 54, 369111, 369124, 358340, G11B 700
Patent
active
053196252
ABSTRACT:
This invention relates to a crosstalk detecting apparatus for detecting crosstalk which can occur when an image signal FM-modulated and recorded on a recording medium is read. The crosstalk detecting apparatus calculates a valve indicative of the amount of crosstalk originating from an adjacent track based on a signal read by a pickup, utilizing a simple construction. The cross-talk detecting apparatus according to the present invention is adapted to detect crosstalk during a period in which an identification signal recorded on the medium is being read therefrom, and comprises an FM-demodulator for demodulating the signal read from the medium, an AM-demodulator for demodulating the signal read from the medium, a multiplier circuit for multiplying the signal output from the FM-demodulator with the signal output from the AM-demodulator and an averaging circuit for averaging the values output by the multiplier circuit.
REFERENCES:
patent: 4001702 (1977-01-01), Kaufman
patent: 5065253 (1991-11-01), Ishii
patent: 5067026 (1991-11-01), Kaneko
Pioneer Electronic Corporation
Young W. R.
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