Title:
BAND CONVERSION SIGNAL GENERATOR AND BAND EXTENDING DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/069400
Kind Code:
A1
Abstract:
A band conversion signal generator includes a low-range characteristic application unit
(16) as component emphasis means for emphasizing only one or more particular frequency
components among the frequency components of an inputted signal; and a low-pass
filter (17) as component extraction means for extracting a signal component
of a desired frequency band from the output signal from the low-range characteristic
application unit (16). A band extending device (1000) includes the band conversion
signal generator and an adder (15) for adding the input signal whose frequency
band is limited and at least one predetermined signal component formed in the
limited frequency band.
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Inventors:
TASHIRO ATSUSHI (JP)
Application Number:
PCT/JP2006/321692
Publication Date:
June 21, 2007
Filing Date:
October 31, 2006
Export Citation:
Assignee:
OKI ELECTRIC IND CO LTD (JP)
TASHIRO ATSUSHI (JP)
TASHIRO ATSUSHI (JP)
International Classes:
G10L21/007; G10L21/0388
Foreign References:
| JP2005173476A | 2005-06-30 | |||
| JP2000250571A | 2000-09-14 | |||
| JP2003256000A | 2003-09-10 |
Other References:
YOSHIDA Y. ET AL.: "Codebook Mapping ni yoru Kyotaiiki Onsei kara Kotaiiki Onsei no Fukugenho", IEICE TECHNICAL REPORT, vol. SP93-61, August 1993 (1993-08-01), pages 31 - 38, XP003014456
MASAAKI MITANI: "Digital Filter Design", 1987, SHOKODO CO., LTD., pages: 139 - 142
MASAAKI MITANI: "Digital Filter Design", 1987, SHOKODO CO., LTD., pages: 139 - 142
Attorney, Agent or Firm:
MAEDA, Minoru et al. (Koda Bldg. 4F 16-2, Yoyogi 2-chom, Shibuya-ku Tokyo 53, JP)
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