专利名称：Method and system for pre-processing
speech
发明人：Tato, Raquel, Sony International (Europe)
GmbH,Kemp, Thomas, Sony International(Europe) GmbH,Abella, Antoni, SonyInternational (Europe) GmbH
申请号：EP03007158.3申请日：20030328公开号：EP1469457A1公开日：20041020
专利附图：
摘要：The invention provides a method for pre-processing speech, in particular in amethod for recognizing speech, comprising the steps of receiving a speech signal (S),separating a spectrum (F) of said speech signal (S) into a given number (N) of
predetermined frequency sub-bands (F1, ..., FN), analyzing said speech signal (S) withineach of said frequency sub-bands (F1, ..., FN), thereby generating respective band-dependent acoustic feature data (O1, ..., ON) for each of said respective frequency sub-bands (F1, ..., FN), which band-dependent acoustic feature data (O1, .... ON) are at least inpart representative for said speech signal (S) with respect to a respective frequency sub-band (F1, ..., FN), deriving band-dependent likelihoods (b1, ..., bN) for occurrences ofspeech elements (P1, ..., Pm) or of sequences thereof within said speech signal (S) basedon said band-dependent acoustic feature data (O1, ..., ON) and/or a derivative thereof,analyzing said speech signal (S) within said entire spectrum (F), thereby generating full-band acoustic feature data (FBE-F; FFBE; FBE-F-SSUB; OF.SSUB), which are at least in partrepresentative for said speech signal (S) with respect to said entire spectrum (F), derivinga full-band likelihood (BFF; BSSUB) for occurrences of speech elements (P1, ..., Pm) or ofsequences thereof within said speech signal (S) based on said full-band acoustic featuredata (FBE-F; FFBE; FBE-F-SSUB; OF,SSUB) and/or a derivative thereof, deriving an overalllikelihood (B) for occurrences of speech elements (P1, ..., Pm) or of sequences thereofwithin said speech signal (S) based on said band-dependent likelihoods (b1, ..., bN) andsaid full-band likelihood (BFF; BSSUB).
申请人：Sony International (Europe) GmbH
地址：Kemperplatz 1 10785 Berlin DE
国籍：DE
代理机构：Müller - Hoffmann & Partner
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