Automatic level adjustment with means for minimizing drop-out ef

Details Automatic level adjustment with means for minimizing drop-out ef Automatic level adjustment with means for minimizing drop-out ef

1982-07-19

1985-03-12

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Checking record characteristics or modifying recording...

360 31, 360 68, G11B 1502, G11B 2736

Patent

active

045048703

ABSTRACT:
A test signal is recorded on a magnetic tape prior to the recording of audio signals and reproduced to allow detection of an average value of the magnitude of the reproduced test signal. A drop-out in the reproduced signal is detected if it occurs during the process of deriving the average value. If the drop-out is not detected, a difference between the average value and a reference value is detected to adjust the signal level of the recorded test signal so that the difference reduces substantially to zero. If a drop-out is detected the average value is renewed by repeating the process of recording and reproducing the test signal.

REFERENCES:
patent: 4258397 (1981-03-01), Kitamura et al.

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