Title:
LINEAR-PREDICTIVE ANALYSIS DEVICE, METHOD, PROGRAM, AND RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2015/008783
Kind Code:
A1
Abstract:
An autocorrelation calculating unit (21) calculates autocorrelation Ro(i) from an input signal. A prediction coefficient calculation unit (23) carries out linear-predictive analysis using modified autocorrelation R'o(i), which is a multiple of a coefficient wo(i) and the autocorrelation Ro(i). Here, a case is included in which, for at least some of the ordinals i, the coefficient wo(i) for the ordinal i has a monotonically increasing relationship as a value having a negative correlation with the fundamental frequency of an input signal in the current or preceding frame increases.
Inventors:
KAMAMOTO YUTAKA (JP)
MORIYA TAKEHIRO (JP)
HARADA NOBORU (JP)
MORIYA TAKEHIRO (JP)
HARADA NOBORU (JP)
Application Number:
PCT/JP2014/068895
Publication Date:
January 22, 2015
Filing Date:
July 16, 2014
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G10L19/06; G10L25/12
Domestic Patent References:
| WO2012046685A1 | 2012-04-12 |
Foreign References:
| JP2010170124A | 2010-08-05 |
Other References:
REDWAN SALAMI ET AL.: "Design and Description of CS -ACELP:A Toll Quality 8 kb/s Speech Coder", IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING, vol. 6, no. 2, 1 March 1998 (1998-03-01), pages 116 - 130, XP011054298
YOICHI TOKURA ET AL.: "PARCOR Taiiki Asshuku Hoshiki ni Okeru Onsei Hinshitsu Kojo", THE TRANSACTIONS OF THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS A, vol. J61-A, no. 3, 25 March 1978 (1978-03-25), pages 254 - 261, XP008182649
ITU-T RECOMMENDATION G.718, ITU, 2008
ITU-T RECOMMENDATION G.729, ITU, 1996
YOH'ICHI TOHKURA; FUMITADA ITAKURA; SHIN'ICHIRO HASHIMOTO: "Spectral Smoothing Technique in PARCOR Speech Analysis-Synthesis", IEEE TRANS. ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, vol. ASSP-26, no. 6, 1978
See also references of EP 3012835A4
YOICHI TOKURA ET AL.: "PARCOR Taiiki Asshuku Hoshiki ni Okeru Onsei Hinshitsu Kojo", THE TRANSACTIONS OF THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS A, vol. J61-A, no. 3, 25 March 1978 (1978-03-25), pages 254 - 261, XP008182649
ITU-T RECOMMENDATION G.718, ITU, 2008
ITU-T RECOMMENDATION G.729, ITU, 1996
YOH'ICHI TOHKURA; FUMITADA ITAKURA; SHIN'ICHIRO HASHIMOTO: "Spectral Smoothing Technique in PARCOR Speech Analysis-Synthesis", IEEE TRANS. ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, vol. ASSP-26, no. 6, 1978
See also references of EP 3012835A4
Attorney, Agent or Firm:
NAKAO, Naoki et al. (JP)
Naoki Nakao (JP)
Naoki Nakao (JP)
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