Digital signal recorder

Details Digital signal recorder Digital signal recorder

1996-05-28

1998-12-22

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 40, 341106, G11B 5584

Patent

active

058525297

ABSTRACT:
A digital signal recorder affixes m bits as a prefix to an input information word of n bits to be encoded into a channel word of n+m bits in parallel. The channel word is divided by a common divisor of the period of the channel word of n+m bits and the period of a pilot signal track pattern useful for read head tracking during playback of the recorded data, to form a series of channel word segments. Spectrum data for all possible values or bit patterns of the divided channel word segments, relative to the track patterns, are stored in look-up tables. The channel word having the frequency characteristic of the desired track pattern is selected by accessing the look-up table using the divided channel word (channel word segment) to provide address bits, so that the selected channel word can be processed, selected and recorded in real time.

REFERENCES:
patent: 4620311 (1986-10-01), Schouhamer Immink
patent: 5140474 (1992-08-01), Kahlman
patent: 5365232 (1994-11-01), Ido et al.
patent: 5400023 (1995-03-01), Ino et al.
patent: 5432651 (1995-07-01), Maeno et al.

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