Method for reproducing audio signals and an apparatus therefore

Details Method for reproducing audio signals and an apparatus therefore Method for reproducing audio signals and an apparatus therefore

1995-09-29

1998-05-19

Chan, Wing F.

Electrical audio signal processing systems and devices

Including frequency control

381 61, H03G 500

Patent

active

057546665

ABSTRACT:
When reproducing an audio signal with a conventional audio signal reproducing system, an unnaturalness in the quality of the reproduced sound occurs. The unnaturalness is caused by the frequency spectrum of the reproduced sound which is decreased or cut off at an upper limit of a reproducible frequency range or at an upper limit of an audible frequency range. The present invention adds a random noise component and/or a higher harmonics component exceeding over the upper limit of the reproducible frequency range or the upper limit of the audible frequency range to the original audio signal. By so doing, the reproduced sound has an excellent audio quality which can be sensed by the listener.

REFERENCES:
patent: 5233665 (1993-08-01), Vaughn et al.
patent: 5267095 (1993-11-01), Hasegawa et al.
patent: 5388159 (1995-02-01), Sakata
patent: 5444784 (1995-08-01), Toyama
patent: 5530769 (1996-06-01), Saitoh
patent: 5574791 (1996-11-01), Orban

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