Title:
NOISE SUPPRESSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/111091
Kind Code:
A1
Abstract:
A band separator (5) divides into bands a plurality of power spectra converted by a time-frequency converter (2) and collects the power spectra in sub-bands. A band-representative component generator (6) sets, from among the plurality of power spectra in sub-bands, the power spectrum having the maximum value as a representative power spectrum. A noise suppression amount generator (7) uses the representative power spectrum and a noise spectrum to calculate the noise suppression amount for the sub-bands, and a noise suppressor (9) suppresses the amplitude of the power spectra in accordance with the noise suppression amount.
Inventors:
FURUTA, Satoru (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
古田訓 (〒10 東京都千代田区丸の内二丁目７番３号 三菱電機株式会社内 Tokyo, 〒1008310, JP)
古田訓 (〒10 東京都千代田区丸の内二丁目７番３号 三菱電機株式会社内 Tokyo, 〒1008310, JP)
Application Number:
JP2010/001649
Publication Date:
September 15, 2011
Filing Date:
March 09, 2010
Export Citation:
Assignee:
Mitsubishi Electric Corporation (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
三菱電機株式会社 (〒10 東京都千代田区丸の内二丁目７番３号 Tokyo, 〒1008310, JP)
FURUTA, Satoru (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
三菱電機株式会社 (〒10 東京都千代田区丸の内二丁目７番３号 Tokyo, 〒1008310, JP)
FURUTA, Satoru (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
International Classes:
G10L21/02
Attorney, Agent or Firm:
TAZAWA, Hideaki et al. (Akasaka Sanno Center Bldg. 5F, 12-4 Nagata-cho 2-chome, Chiyoda-k, Tokyo 14, 〒1000014, JP)
Claims: