Title:
AUDIO QUALITY ADJUSTMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2004/107573
Kind Code:
A1
Abstract:
An audio quality adjustment device includes: a desired filter response input section (11) for inputting a desired filter response to the audio quality adjustment device; a spectrum calculation section (12) for calculating a Fourier spectrum for a filter response which has been input and set by the desired filter response input section (11); a spectrum smoothing processing section (13) for subjecting the Fourier spectrum calculated by the spectrum calculation section (12) to smoothing processing; a cepstrum calculation section (14) for transforming the Fourier spectrum smoothed by the spectrum smoothing processing section (13) into a cepstrum; and an LMA filter (15) using the cepstrum calculated by the cepstrum calculation section (14) as a filter coefficient. Moreover, the LMA filter (15) has an input terminal (16) for inputting an audio signal and an output terminal (17) for outputting an audio signal.
Inventors:
YANO ATSUYOSHI (JP)
Application Number:
PCT/JP2004/006891
Publication Date:
December 09, 2004
Filing Date:
May 14, 2004
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
YANO ATSUYOSHI (JP)
YANO ATSUYOSHI (JP)
International Classes:
H03G5/02; H03H17/00; H03H17/02; H03H17/04; (IPC1-7): H03H17/02; H03H17/04; H04R3/00
Foreign References:
| JPH0736484A | 1995-02-07 | |||
| JPH09261005A | 1997-10-03 | |||
| JPH02108318A | 1990-04-20 | |||
| JPH06315104A | 1994-11-08 | |||
| JPH0697772A | 1994-04-08 |
Attorney, Agent or Firm:
Tazawa, Hiroaki (7-1 Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, JP)
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