Title:
METHOD AND DEVICE FOR SIGNAL SYNTHESIS
Document Type and Number:
Japanese Patent JP3189598
Kind Code:
B2
Abstract:
PURPOSE: To provide the signal synthesizing device which synthesizes a signal of high sound quality by converting a band-limited input signal into a wide-band signal having a wide frequency band covering the frequency band that the input signal has.
CONSTITUTION: The device is equipped with an acoustic analyzer 101 which extracts spectrum information by taking a sound analysis of the band limited input signal, a narrow-band data processor 102 which extracts narrow-band spectrum information from learning data, a wide-band data processor 103 which extracts wide-band spectrum information from the learning data, a mapping function estimation unit 104 which estimates a mapping function from the narrow-band spectrum information and wide-band spectrum information, a band widening unit 105 which converts the spectrum information on the input signal into wide-band spectrum information by widening the band with the mapping function, and a signal synthesizer 106 which synthesizes a wide-band signal having a wide frequency band covering the frequency band of the input signal from the band-widened spectrum information.
Inventors:
Yoshihisa Nakafuji
Mineo Tsushima
Takeshi Norimatsu
Mineo Tsushima
Takeshi Norimatsu
Application Number:
JP26532494A
Publication Date:
July 16, 2001
Filing Date:
October 28, 1994
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G10L19/038; G10L13/00; G10L21/003; G10L21/0388; G10L21/04; G10L21/057; (IPC1-7): G10L13/00; G10L19/00; G10L21/04
Domestic Patent References:
| JP6118995A | ||||
| JP8123495A |
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)
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