Audio circuit

Details Audio circuit Audio circuit

1995-11-16

1998-06-23

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Amplifier

381 61, 381 98, H03G 500

Patent

active

057712964

ABSTRACT:
An audio circuit for use in a television receiver and the like compensates for the capacity shortage of a speaker box or low frequency characteristic of the speaker to reproduce vivid and voluminous low frequency sound. L and R signals of the audio signal are mixed, and then an arbitrary low frequency band component is extracted therefrom by a filter having an arbitrary frequency characteristic, and extracted component is bisected by a distribution means, and only low frequency band component is added to the original L and R signals to reproduce the audio signal which is voluminous in a low frequency band. With a low frequency band which is difficult to be reproduced by a speaker, the harmonic is stressed by full-wave rectification means to stress low frequency sound feeling, and when a switching circuit is provided, low frequency sound stressing by an amplifier and low frequency sound harmonic stressing by full-wave rectification means can be easily switched.

REFERENCES:
patent: 4180707 (1979-12-01), Moog
patent: 4698842 (1987-10-01), Mackie et al.
patent: 4700390 (1987-10-01), Machida

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