Systems for recording both information and pilot signals directl

Details Systems for recording both information and pilot signals directl Systems for recording both information and pilot signals directl

1980-02-21

1982-11-23

Hecker, Stuart N.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358343, 360 32, 369 47, 369 59, H04N 576

Patent

active

043608248

ABSTRACT:
An information signal recording system comprises a circuit for generating pilot signals for tracking control, a circuit for generating a rectangular waveform signal of a specific frequency existing in an artificial synchronizing signal duration in every specific period and having almost no frequency component equal to and in the vicinity of the frequencies of the pilot signals, a circuit for pulse code modulating or difference modulating an information signal, further digital modulating the information signal, and obtaining a digital information signal existing in a time interval other than the artificial synchronizing signal duration. The digital information signal is recorded along a main track on a recording medium and the pilot signals are recorded along pilot signal tracks contiguous to the main track.

REFERENCES:
patent: 4206476 (1980-06-01), Hashimoto
patent: 4208671 (1980-06-01), Ozawa et al.
"A New Look-Ahead Code for Increased Data Density," Jacoby, IEEE Transactions on Magnetics, vol. Mag-13, No. 5, Sep. 77, pp. 1202-1204.
"A Long Play Digital Audio Disk System," Doi, Itoh, Ogawa, Journal of the Audio Engineering Society, Dec. 1979, vol. 27, No. 12, pp. 975-981.

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