Title:
LINEAR-PREDICTIVE ANALYSIS DEVICE, METHOD, PROGRAM, AND RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2015/111569
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, there are cases in which, with respect to at least some of the orders i, the coefficient wo(i) for each order i monotonically increases with an increase in a value having a negative correlation with the fundamental frequency of an input signal in the current or preceding frame and monotonically decreases with an increase in a value having a positive correlation with the pitch gain in the current or preceding frame.
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Inventors:
KAMAMOTO YUTAKA (JP)
MORIYA TAKEHIRO (JP)
HARADA NOBORU (JP)
MORIYA TAKEHIRO (JP)
HARADA NOBORU (JP)
Application Number:
PCT/JP2015/051352
Publication Date:
July 30, 2015
Filing Date:
January 20, 2015
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G10L25/12; G10L25/06; G10L25/27
Domestic Patent References:
| WO2010073977A1 | 2010-07-01 | |||
| WO2010084951A1 | 2010-07-29 |
Foreign References:
| JP2009500681A | 2009-01-08 | |||
| JP2007279393A | 2007-10-25 | |||
| JP2007286200A | 2007-11-01 | |||
| JP2008185701A | 2008-08-14 |
Other References:
YOH'ICHI TOHKURA ET AL.: "Spectral Smoothing Technique in PARCOR Speech Analysis-Synthesis", IEEE TRANSACTIONS ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, vol. 26, no. 6, December 1978 (1978-12-01), pages 587 - 596, XP002032606
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, XP002032606, DOI: doi:10.1109/TASSP.1978.1163165
See also references of EP 3098813A4
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, XP002032606, DOI: doi:10.1109/TASSP.1978.1163165
See also references of EP 3098813A4
Attorney, Agent or Firm:
NAKAO, Naoki et al. (JP)
Naoki Nakao (JP)
Naoki Nakao (JP)
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