Indicator for headroom extension system for tape recorders

Details Indicator for headroom extension system for tape recorders Indicator for headroom extension system for tape recorders

1980-08-13

1982-08-17

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360 31, G11B 547, G11B 2736

Patent

active

043452817

ABSTRACT:
A visual indicator for a tape or cassette recorder, which includes a noise-reduction system which in addition to varying the amplitude level of the recorded signal also varies the high frequency pre-emphasis and the bias current applied to the tape. Decreasing the bias current when high amplitude, high frequency signals are present increases the headroom available on the tape. The visual indicator provides an indicator of the amount of headroom when recording.

REFERENCES:
"Dolby HX New Noise Reduction" by Leonard Feldman, Radio Electronics, vol. 50, #12, 12/79.
"Audiolevel Indicators"--Wm. Pleass, Practical Wireless, vol. 53, #6, 10/77.

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