Dynamic magnetic information storage or retrieval – Converting an analog signal to digital form for recording;...
Patent
1985-03-15
1987-08-04
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
Converting an analog signal to digital form for recording;...
360 48, G11B 500, G11B 509
Patent
active
046850040
ABSTRACT:
In a recording operation by a rotary head type PCM recording/reproducing apparatus including at least two magnetic heads, the odd-numbered sample data and the even-numbered sample data are discriminatively extracted and stored. The stored data corresponding to an amount of data outputted from the A/D converter within a predetermined time is selectively read out and supplied to the two heads to thereby record the data in such a manner that the odd-numbered data and the even-numbered data are recorded separately on a track basis or alternatively recorded separately on a preceding half and a succeeding half of each track. The error detecting and correcting code is prepared on the basis of the data to be recorded in each track. In reproduction of the recorded data, upon detection of a drop-out of the data from one of the two heads, the drop-out data is corrected through interpolation procedure to thereby reconstitute the original analog signal.
REFERENCES:
patent: 4224642 (1980-09-01), Mawatori et al.
patent: 4477844 (1984-10-01), Nakano et al.
Arai Takao
Kobayashi Masaharu
Noguchi Takaharu
Shibuya Toshifumi
Takahashi Hiroaki
Canney Vincent P.
Hitachi , Ltd.
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