Title:
音声信号復元装置および音声信号復元方法
Document Type and Number:
Japanese Patent JP5595605
Kind Code:
B2
Abstract:
A sound source generating unit 101 generates from a narrowband audio signal not passing through noise suppression a sound source signal including a fine structure of a band to be restored. On the other hand, a noise suppressing unit 102 performs noise suppression of the narrowband audio signal and a spectral envelope estimating unit 103 estimates an spectral envelope of the band to be restored. A signal synthesizing unit 104 generates a pseudo-audio signal by combining the sound source signal and the spectral envelope, and the band-pass filter unit 105 passes the pseudo-audio signal of the band to be restored, and the signal addition unit 106 generates a broadband audio restoration signal by adding the pseudo-audio signal of the band to be restored to the narrowband audio signal.
Inventors:
Kosuke Hosoya
Satoshi Furuta
Tadashi Yamaura
Satoshi Furuta
Tadashi Yamaura
Application Number:
JP2013551031A
Publication Date:
September 24, 2014
Filing Date:
December 27, 2011
Export Citation:
Assignee:
Mitsubishi Electric Corp.
International Classes:
G10L21/0388; G10L21/0232
Attorney, Agent or Firm:
Hideaki Tazawa
Hamada First sound
Teruyo Kume
Kawamura 秀央
Hamada First sound
Teruyo Kume
Kawamura 秀央
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