Title:
遅延を低減する方法および装置、エコーキャンセラ装置並びにノイズ抑圧装置
Document Type and Number:
Japanese Patent JP5312030
Kind Code:
B2
Abstract:
An apparatus for reducing a digital filter delay includes means for determining the magnitude response of a desired filter. Means form the real cepstrum of this magnitude response. Means transform the real cepstrum into a complex cepstrum of a corresponding minimum-phase filter having the same magnitude response as the desired filter. A filter applies a smoothly decaying shaping window to the complex cepstrum. Means transform the shaped complex cepstrum into an estimated minimum-phase filter.
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Inventors:
Rusk, Dan
Tulum, Tenu
Tulum, Tenu
Application Number:
JP2008537644A
Publication Date:
October 09, 2013
Filing Date:
October 31, 2006
Export Citation:
Assignee:
Telefon Akti Bora Get Elm Ericson (Pubble)
International Classes:
H03H17/06; H03H17/02
Domestic Patent References:
| JP2001195099A | ||||
| JP7141324A | ||||
| JP5276409A | ||||
| JP2004356894A | ||||
| JP2005519502A | ||||
| JP2003533902A | ||||
| JP2001513293A | ||||
| JP2001521705A | ||||
| JP2005124113A | ||||
| JP62155606A |
Foreign References:
| US20030090783 | ||||
| WO2004068463A1 |
Other References:
Reddy, G.R. ,Design of minimum-phase FIR digital filter through cepstrum ,Electronics Letters ,1986年11月 6日,Vol.22 ,No.23 ,p.1225 - 1227
今井 聖,音声信号処理 音声の性質と聴覚の特性を考慮した信号処理,森北出版株式会社,1996年11月30日,第1版,p.126-128
今井 聖,音声信号処理 音声の性質と聴覚の特性を考慮した信号処理,森北出版株式会社,1996年11月30日,第1版,p.126-128
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama