Pitch period equalizing apparatus and pitch period...

Details Pitch period equalizing apparatus and pitch period... Pitch period equalizing apparatus and pitch period...

2011-06-07

2011-06-07

Opsasnick, Michael N (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

Reexamination Certificate

active

07957958

ABSTRACT:
To provide a speech coding technology that realizes a low bit rate and can suppress distortion of reproduction speech as compared with a conventional technology.There are provided pitch detecting means5that detects a pitch frequency of an input speech signal, residual calculating means6that calculates the difference (residual frequency) between the pitch frequency and a reference frequency, a frequency shifter4that shifts a frequency of the input speech signal in proportional to the residual frequency in a direction for being close to the reference frequency and equalizes a pitch period, and orthogonal transforming means that orthogonally transforms the speech signal (pitch-equalizing speech signal) output by the frequency shifter4by a constant number of the pitch intervals and generates transforming coefficient data, and waveform coding means that encodes the transforming coefficient data.

REFERENCES:
patent: 5774837 (1998-06-01), Yeldener et al.
patent: 5787391 (1998-07-01), Moriya et al.
patent: 7039581 (2006-05-01), Stachurski et al.
patent: 7180892 (2007-02-01), Tackin
patent: 7263480 (2007-08-01), Minde et al.
patent: 7272556 (2007-09-01), Aguilar et al.
patent: 2004/0030546 (2004-02-01), Sato
patent: 2005/0065788 (2005-03-01), Stachurski
patent: 03-080300 (1991-04-01), None
patent: 3199128 (1993-11-01), None
patent: 2003-108172 (2003-04-01), None
patent: 2003-108200 (2003-04-01), None
patent: 2004-012908 (2004-01-01), None
patent: WO-02/097798 (2002-12-01), None
Supplementary European Search Report dated Sep. 1, 2008, issued for the European patent application No. 06729916.4.
Toshio Kanno et al., “Generation of Excitation Signal for Speech Analysis-Synthesis System Using Phase Characteristic,” IEICE Technical Report [Onsei], SP91-80, vol. 91, No. 347, Nov. 22, 1991, p. 31-36.
Cheng-Yuan Lin et al., “New Refinement Schemes for Voice Conversion,” Multimedia and Expo, ICME '03. Proceedings, vol. 2, 2003, pp. II-725-II-728.
Manfred R. Schroeder et al., “Code-excited Linear Prediction (CELP): High-Quality Speech at Very Low Bit Rates,” Proceedings of ICASSP '85, 1985, pp. 25.1.1-25.1.4.
Hitoshi Kiya, “Multi rate Signal Processing in Series of Digital Signal Processing (vol. 14)”, first edition, Oct. 6, 1995, pp. 34 to 49-78 to 79.

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