Title:
SPEECH SIGNAL RESTORATION DEVICE AND SPEECH SIGNAL RESTORATION METHOD
Document Type and Number:
WIPO Patent Application WO/2011/080855
Kind Code:
A1
Abstract:
A synthesis filter (106) synthesizes wide band phonological signals and sound source signals selected from a speech signal codebook (105) into a plurality of wide band speech signals, and a distortion evaluation unit (107) selects a wide band speech signal having the lowest waveform distortion relative to an up-sampled narrow band speech signal output from a sampling conversion unit (101). A first band filter (103) extracts frequency components from the wide band speech signal other than the frequency components in a narrow band, and a band combining unit (104) combines the extracted frequency components with the up-sampled narrow band speech signal.
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:
JP2010/006264
Publication Date:
July 07, 2011
Filing Date:
October 22, 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; H04M1/00
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)
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