Presentation	1998/3/5 Consideration on Wideband Speech Recovery in Telephone Communications Hiroshi Yasukawa,
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Abstract(in English)	This paper describes methods that can enhance the quality of speech signals that are severely band limited during regular telephone speech transmission.We have already proposed a spectrum widening method that utilizes aliasing in sampling rate conversion and digital filtering for spectrum shaping.This paper discusses the method using linear prediction.Speech components of the outbands of the received signal are basically generated by LPC(linear predictive coding)synthesis by analysis.Furthermore, we discuss a new spectrum widening method using a multilayer backpropagation neural network.It is shown that the proposed method has a good performance of recovering the wideband speech.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	speech enhancement / telephne communication / wideband recovery
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Conference Information
Committee	CAS
Conference Date	1998/3/5(1days)
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Paper Information
Registration To	Circuits and Systems (CAS)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Consideration on Wideband Speech Recovery in Telephone Communications
Sub Title (in English)
Keyword(1)	speech enhancement
Keyword(2)	telephne communication
Keyword(3)	wideband recovery
1st Author's Name	Hiroshi Yasukawa
1st Author's Affiliation	NTT Optical Network Systems Laboratories Nippn Telegraph and Telephone Corporation()
Date	1998/3/5
Paper #
Volume (vol)	vol.97
Number (no)	580
Page	pp.pp.-
#Pages	5
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