Apparatus for reproducing information signals recorded on a reco

Details Apparatus for reproducing information signals recorded on a reco Apparatus for reproducing information signals recorded on a reco

1981-07-02

1983-11-08

Atkinson, Charles E.

Excavating

358336, 369 50, 371 5, G06F 1110, H04N 580

Patent

active

044146680

ABSTRACT:
An apparatus for reproducing information signals recorded on a recording medium comprising a pickup transducer for picking up a recorded signal from an information signal recording medium in which an analog information signal is successively recorded in units of a plurality of data blocks, the data block having a train of digital signals obtained by digitally modulating the analog information signal, error correcting words, and an error detection word, a frequency characteristic regulation circuit for regulating the frequency characteristic of the signal picked up from the information signal recording medium by the pickup transducer, an error detection circuit for detecting whether an error exists in the data block of a signal which has passed through the frequency characteristic regulation circuit, by use of the error detection word, and a control circuit for controlling the frequency characteristic regulation circuit to vary the frequency characteristic according to an output of the error detection circuit.

REFERENCES:
patent: 3662353 (1972-05-01), Chertok
patent: 3736582 (1973-05-01), Norris
patent: 3882540 (1975-05-01), Ottesen
patent: 4003086 (1977-01-01), Larsen et al.
patent: 4021852 (1977-05-01), Hurst et al.
patent: 4161753 (1979-07-01), Bailey et al.
patent: 4203134 (1980-05-01), Christopher et al.
patent: 4309721 (1982-01-01), Christopher
patent: 4327431 (1982-04-01), Dieterich et al.
patent: 4363117 (1982-12-01), Wine
patent: 4364119 (1982-12-01), Gibson
IEEE Spectrum, vol. 16, No. 12, Dec. 1979, New York (U.S.), Bernhard: "High Fi by Digits", pp. 28-32.

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