WIDEBAND SPEECH RECOVERY METHOD AND WIDEBAND SPEECH RECOVERY APPARATUS

WIDEBAND SPEECH RECOVERY METHOD AND WIDEBAND SPEECH RECOVERY APPARATUS

PROBLEM TO BE SOLVED: To obtain a wideband speech recovery apparatus which estimates a stable wideband sound source at correct amplitude from a narrow-band speech or narrow-band speech code without receiving the effect of differences in speakers or noise so much and recovers a high quality wideband...

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1. Verfasser: TAZAKI HIROHISA
Format: Patent
Sprache:eng
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ACOUSTICS
MUSICAL INSTRUMENTS
PHYSICS
SPEECH ANALYSIS OR SYNTHESIS
SPEECH OR AUDIO CODING OR DECODING
SPEECH OR VOICE PROCESSING
SPEECH RECOGNITION
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creator TAZAKI HIROHISA
description PROBLEM TO BE SOLVED: To obtain a wideband speech recovery apparatus which estimates a stable wideband sound source at correct amplitude from a narrow-band speech or narrow-band speech code without receiving the effect of differences in speakers or noise so much and recovers a high quality wideband speech signal. SOLUTION: The apparatus comprises a narrow-band sound source restoration means for generating a narrow-band composite tone by using the narrow-band speech code, a spectrum restoration means for estimating a wideband spectrum parameter by using the narrow-band spectrum code separated from the narrow-band speech code, a wideband sound source restoration means for estimating the wideband sound source signal by using the narrow-band sound source code separated from the narrow-band speech code, and a composition means for generating the wideband speech signal from the narrow-band composite tone generated therefrom, the estimated wideband spectrum parameter and the wideband sound source signal. COPYRIGHT: (C)2006,JPO&NCIPI
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SOLUTION: The apparatus comprises a narrow-band sound source restoration means for generating a narrow-band composite tone by using the narrow-band speech code, a spectrum restoration means for estimating a wideband spectrum parameter by using the narrow-band spectrum code separated from the narrow-band speech code, a wideband sound source restoration means for estimating the wideband sound source signal by using the narrow-band sound source code separated from the narrow-band speech code, and a composition means for generating the wideband speech signal from the narrow-band composite tone generated therefrom, the estimated wideband spectrum parameter and the wideband sound source signal. 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SOLUTION: The apparatus comprises a narrow-band sound source restoration means for generating a narrow-band composite tone by using the narrow-band speech code, a spectrum restoration means for estimating a wideband spectrum parameter by using the narrow-band spectrum code separated from the narrow-band speech code, a wideband sound source restoration means for estimating the wideband sound source signal by using the narrow-band sound source code separated from the narrow-band speech code, and a composition means for generating the wideband speech signal from the narrow-band composite tone generated therefrom, the estimated wideband spectrum parameter and the wideband sound source signal. 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subjects ACOUSTICS
MUSICAL INSTRUMENTS
PHYSICS
SPEECH ANALYSIS OR SYNTHESIS
SPEECH OR AUDIO CODING OR DECODING
SPEECH OR VOICE PROCESSING
SPEECH RECOGNITION
title WIDEBAND SPEECH RECOVERY METHOD AND WIDEBAND SPEECH RECOVERY APPARATUS
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