Drop-out compensator for sound reproducing apparatus during tape

Details Drop-out compensator for sound reproducing apparatus during tape Drop-out compensator for sound reproducing apparatus during tape

1976-10-29

1980-01-15

Cardillo, Jr., Raymond F.

Dynamic magnetic information storage or retrieval

Recording or reproducing an information signal and a control...

1791001R, 1791001VC, 1791004D, 360 38, 360 741, G11B 502, G11B 1518

Patent

active

041841786

ABSTRACT:
The invention comprises a circuit arrangement for a sound-reproducing apparatus, particularly a video tape recorder having an audio channel, wherein upon the occurence of a sound signal drop-out interval within a continuous audio signal, for example within the track-switching period in multi-track sound recordings, an audio frequency signal is inserted in the drop-out interval so that the interval is rendered unnoticeable to the listener. The apparatus can be advantageously employed for recorders in which sound signals are recorded on the tracks of a magnetic tape or disc, or on grooved tracks in a disc. In one preferred embodiment of the invention the arrangement comprises circuitry for attenuating the noise burst which occurs during the track-switching period of a multi-track recorder using a frequency modulated audio signal, the degree to which the noise is attenuated being correlated to the level of the immediately preceding audio signal. Further embodiments of the invention comprise circuitry for inserting audio frequency noise signals of a predetermined level during the drop-out interval.

REFERENCES:
patent: 2996576 (1961-08-01), Dolby
patent: 3280270 (1966-10-01), Allington
patent: 3356794 (1967-12-01), Felix
patent: 3407266 (1968-10-01), Araki et al.
patent: 3487175 (1969-12-01), Newell
patent: 3678416 (1972-07-01), Burwen
patent: 3936619 (1976-02-01), Sugimoto
patent: 3958272 (1976-05-01), Rotter et al.
patent: 4021852 (1977-05-01), Hurst et al.

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