Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Patent
1992-03-16
1994-01-04
Westin, Edward P.
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
358315, H04N 578
Patent
active
052765628
ABSTRACT:
A compensating deemphasis circuit is connected to a preemphasis circuit in series. The deemphasis circuit has the same characteristic as a deemphasis circuit provided in a playback system. An input signal and an output signal which are connected in series are supplied to a subtracter. The subtracter extracts a distortion component. This distortion component is overlapped to an output signal of the preemphasis circuit through a weight coefficient generating device. When the signal passes through the deemphasis circuit in the record and playback system and that in the playback system, the distortion component is canceled.
REFERENCES:
patent: 4303952 (1981-12-01), Yamamitsu et al.
patent: 4682251 (1987-07-01), Hirota et al.
patent: 4789906 (1988-12-01), Urata et al.
IBA Experimental & Development Report 151/89 Sep. 1989, Crawley Court, Winchester, Hampshire B. Beech, C. Baudoin `Compatible Non-Linear Pre-emphasis for MAC Signals` p. 1, right column, line 19-line 25; figure 1, p. 2, right column, line 25-p. 3, left column, line 1, p. 9, right column, line 12-p. 10, left column, line 6.
Frommer William S.
Le Que T.
Sinderbrand Alvin
Sony Corporation
Westin Edward P.
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