Electrical audio signal processing systems and devices – Including amplitude or volume control – Automatic
Patent
1997-02-10
1998-10-27
Isen, Forester W.
Electrical audio signal processing systems and devices
Including amplitude or volume control
Automatic
360 25, 360 66, H03G 300
Patent
active
058287647
ABSTRACT:
An apparatus for controlling an audio recording bias is provided for improving a signal-to-noise (S/N) ratio in a high-frequency region of a recording signal by controlling a bias when an audio signal is recorded. The apparatus includes a high-pass filter for passing only high frequency components of an input audio signal, and a bias signal generator for generating an oscillating bias signal which is inversely proportional to the level of the high-pass filtered audio signal, and is of a predetermined level in the middle- and low-frequencies of the input audio signal. In the above-described apparatus, a bias level is controlled in the high-frequency region of an input audio signal so that the saturation of the audio signal in the high-frequency region is prevented to thereby expand a frequency area of the signal being recorded. Also, the level of the recording signal is heightened compared to the conventional art, thereby improving the S/N ratio in the high-frequency region.
REFERENCES:
patent: 4263624 (1981-04-01), Gundry
patent: 4344094 (1982-08-01), Ohtake et al.
patent: 4454548 (1984-06-01), Jensen
patent: 4553179 (1985-11-01), Inami et al.
Lee Hai-wook
Vikulov Igor G.
Isen Forester W.
Samsung Electronics Co,. Ltd.
LandOfFree
Apparatus for controlling audio recording bias does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for controlling audio recording bias, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for controlling audio recording bias will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1620383