Title:
オーディオ信号をパラメータ化された表現に変換するための装置および方法、パラメータ化された表現を修正するための装置および方法、オーディオ信号のパラメータ化された表現を合成するための装置および方法
Document Type and Number:
Japanese Patent JP5467098
Kind Code:
B2
Abstract:
An apparatus for modifying a parameterized representation having, for a time portion of an audio signal, band pass filter information for a plurality of band pass filters, the band pass filter information indicating time-varying band pass filter center frequencies of band pass filters having band widths, which depend on a band pass filter center frequency of the corresponding band pass filters, and having amplitude modulation or phase modulation or frequency modulation information for each band pass filter for the time portion of the audio signal, the modulation information being related to the center frequencies of the band pass filters, comprises: a modifier (160) for modifying the time varying center frequencies or for modifying the amplitude modulation or phase modulation or frequency modulation information and for generating a modified parameterized representation, in which the band widths of the band pass filters depend on the band pass filter center frequencies of the corresponding band pass filters, wherein the modifier (160) is operative to modify the amplitude modulation information or the phase modulation information or the frequency modulation information by a non-linear decomposition into a coarse structure and a fine structure and by only modifying either the coarse structure or the fine structure.
Inventors:
This Sasha
Application Number:
JP2011500074A
Publication Date:
April 09, 2014
Filing Date:
March 10, 2009
Export Citation:
Assignee:
Fraunhofer-Gesellschaftsza Felderung der Angewanten Vorschung A. Fao
International Classes:
G10L19/032; G10L19/02; G10L19/035
Domestic Patent References:
| JP7261798A | ||||
| JP2007535849A | ||||
| JP2004350077A |
Foreign References:
| WO2007118583A1 |
Other References:
Alexandros Potamianos, et al.,"Speech analysis and synthesis using an AM-FM modulation model",SPEECH COMMUNICATION 28,Elsevier Science B.V.,1999年 7月,pp.195-209
Attorney, Agent or Firm:
Masahiro Okada