Hybrid digital-analog signal recording-playback system

Details Hybrid digital-analog signal recording-playback system Hybrid digital-analog signal recording-playback system

1982-03-10

1984-07-24

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Converting an analog signal to digital form for recording;...

360 22, G11B 500, G11B 1502

Patent

active

044620500

ABSTRACT:
A hybrid audio frequency recorder employing digital signal processing techniques in the recording and playback sections combined with analog recording on the magnetic recording medium. For recording, the audio frequency signal is sampled and each sample converted to a composite digital word in parallel bit form. The word bits are separated into sub-words, the sub-words then being converted back separately into analog form for recording on separate tracks of the recording tape. On playback, the analog signals are reproduced from the separate tracks of the tape, converted into digital sub-words which are then combined to reconstitute the composite digital word representing the original amplitude of the audio frequency signal sample. Successive ones of the composite words are filtered to produce a faithful reproduction of the original audio frequency signal. In addition to operation with a magnetic recording medium, the system is also useful with other recording media such as video disc, laser recording, and the like, wherever it is desired to improve the signal-to-noise ratio performance of the recording and playback process.

REFERENCES:
patent: 4125865 (1978-11-01), Mohammadio'on
patent: 4222072 (1980-09-01), Bailey

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