System for bandwidth extension of narrow-band speech

Details System for bandwidth extension of narrow-band speech System for bandwidth extension of narrow-band speech

2007-03-26

2009-11-03

Abebe, Daniel D (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S217000, C704S218000

Reexamination Certificate

active

07613604

ABSTRACT:
A system and method are disclosed for extending the bandwidth of a narrowband signal such as a speech signal. The method applies a parametric approach to bandwidth extension but does not require training. The parametric representation relates to a discrete acoustic tube model (DATM). The method comprises computing narrowband linear predictive coefficients (LPCs) from a received narrowband speech signal, computing narrowband partial correlation coefficients (parcors) using recursion, computing Mnbarea coefficients from the partial correlation coefficient, and extracting Mwbarea coefficients using interpolation. Wideband parcors are computed from the Mwbarea coefficients and wideband LPCs are computed from the wideband parcors. The method further comprises synthesizing a wideband signal using the wideband LPCs and a wideband excitation signal, highpass filtering the synthesized wideband signal to produce a highband signal, and combining the highband signal with the original narrowband signal to generate a wideband signal. In a preferred variation of the invention, the Mnbarea coefficients are converted to log-area coefficients for the purpose of extracting, through shifted-interpolation, Mwblog-area coefficients. The Mwblog-area coefficients are then converted to Mwbarea coefficients before generating the wideband parcors.

REFERENCES:
patent: 5978759 (1999-11-01), Tsushima et al.
patent: 6323907 (2001-11-01), Hwang
patent: 6691083 (2004-02-01), Breen
patent: 6813335 (2004-11-01), Shinbata
patent: 6895375 (2005-05-01), Malah et al.
patent: 7317309 (2008-01-01), Yamaguchi et al.
patent: 2001/0044722 (2001-11-01), Gustafsson et al.
patent: 2002/0193988 (2002-12-01), Chennoukh et al.
patent: 0 287 104 (1988-04-01), None
patent: 01292400 (1989-11-01), None
Yasukawa H Ed—Bunnell H T et al. “Restoration of wide band signal from telephone speech using linear prediction error processing”, Spoken Language, 1996. ICSLP 96 Proceedings., Fourth International Conf. on Philadephia, PA, USA Oct. 3-6, 1996, New York, NY, USA IEEE, US, Oct. 3, 1996, pp. 901-904.
Atal, B.S. et al., “Speech Analysis and Synthesis by Linear Prediction of the SpeechWave”, Journal of the Acoustical Society of America, American Institute of Physics, New York, US, vol. 50, No. 2, Jan. 1971, pp. 637-655.
Valimaki et al., “Articulartory Control of a Vocal Tract Model Based on Fractional Delay Waveguide Filters”, Speech, Image Processing and Neural Networks, 1994. Proceedings, ISSIPNN '94, 1994 Intl. Symposium on Hong Kong, Apr. 13-16, 1994, New York, NY, USA, IEEE, Apr. 13, 1994, pp. 571-574.
Nakatoh, Y. et al., “Generation of Broadband Speech from Narrowband Speech Using Piecewise Linear Mapping”, Proc. European Conf. Speech Comm. and Technology, EUROSPEECH '97, 1997.
Cheng, Y.M. et al., “Statistical Recovery of Wideband Speech from Narrowband Speech,” IEEE Trans. Speech and Audio Processing, vol. 2, No. 4, pp. 544-548, Oct. 1994.
Carl, H. et al., “Bandwidth Enhancement of Narrow-Band Speech Signals”, Proc. European Signal Processing Conf.—EUSIPCO '94, pp. 1178-1181, 1994.
Yoshida, Y., “An Algorithm to Reconstruct Wideband Speech from Narrowband Speech Based on Codebook Mapping,” Proc. Intl. Conf. Spoken Language Processing, ICSLP '94, 1994.
Yasukawa, H. “Quality Enhancement of Band Limited Speech by Filtering and Multi-rate Techniques,” Proc. Intl. Conf. Spoken Language Processing, ICSLP '94, 1994, pp. 1607-1610.
Hermansky, H. et al., “Speech Enhancement Based on Temporal Processing,” Proc. Intl. Conf. Acoust., Speech, Signal Processing, ICASSP '95, pp. 405-408, 1995.
Yasukawa, H., “Enhancement of Telephone Speech Quality by Simple Spectrum Extrapolation Method”, Proc. European Conf. Speech Comm. and Technology, EUROSPEECH '95, 1995.
Yasukawa, H. “Adaptive Filtering for Broad Band Signal Reconstruction Using Spectrum Extrapolation,” Proc. IEEE Digital Signal Processing Workshop, pp. 169-172, 1996.
Yasukawa, H. “Restoration of Wide Band Signal from Telephone Speech Using Linear Prediction Residual Error Filtering,” Proc. IEEE Digital Signal Processing Workshop, pp. 176-178, 1996.
Yasukawa, H. “Implementation of Frequency Domain Digital Filter for Speech Enhancement”, Proc. Intl. Conf. Electronics, Circuits and Systems, ICECS '96, pp. 518-521, 1996.
Yasukawa , H. “Signal Restoration of Broad Band Speech Using Nonlinear Processing”, Proc. European Conf. Speech Comm. and Technology, EUROSPEECH '96, pp. 987-990, 1996.
Yasukawa, H. “Wideband Speech Recovery from Bandlimited Speech in Telephone Communications,” Proc. Intl. Symp. Circuits and Systems, ISCAS '98, pp. IV-202-IV-205, 1998.
Epps, J. et al., “A New Technique for Wideband Enhancement of Coded Narrowband Speech”, Proc. IEEE Speech Coding Workshop, SCW '99, 1999.
Enbom, N. et al., “Bandwidth Expansion of Speech Based on Vector Quantization of the Mel Frequency Cepstral Coefficients,” Proc. IEEE Speech Coding Workshop, SCW '99, 1999.
Jax, P. et al., “Wideband Extension of Telephone Speech Using a Hidden Markov Model”, Proc. IEEE Speech Coding Workshop, SCW '00, 2000.
Valin, J-M. et al., “Bandwidth Extension of Narrowband Speech for Low Bit-Rate Wideband Coding,” Proc. IEEE Speech Coding Workshop, SCW '00, 2000.
Park et al., K-Y et al., “Narrowband to Wideband Conversion of Speech Using GMM Based Transformation”, Proc. Intl. Conf. Acoust., Speech, Signal Processing, ICASSP '00, pp. 1843-1846, 2000.
Miet, G. et al., “Low-Band Extension of Telephone-Band Speech.” Proc. Intl. Conf. Acoust., Speech, Signal Processing, ICASSP '00, pp. 1851-1854, 2000.
Chennoukh, S. et al., “Speech Enhancement Via Frequency Bandwidth Extension Using Line Spectral Frequencies”, Proc. Intl. Conf. Acoust., Speech, Signal Processing, ICASSP '01, 2001.
Uncini, A. et al., “Frequency Recovery of Narrow-Band Speech Using Adaptive Spline Neutral Networks,” Proc. Intl. Conf. Acoust., Speech, Signal Processing, ICASSP '99, 1999.
McCree, A., “A 14 kb/s Wideband Speech Coder with a Parametric Highband Model,” Proc. Intl. conf. Acoust., Speech, Signal Processing, ICASSP '00, pp. 1153-1156, 2000.
Taori, R., “Hi-Bin: An Alternative Approach to Wideband Speech Coding”, Proc. Intl. Conf. Acoust., Speech, Signal Processing, ICASSP '00, pp. 1157-1160, 2000.
McCree, A., “An Embedded Adaptive Multi-rate Wideband Speech Coder”, Proc. Intl. Conf. Acoust., Speech, Signal Processing, ICASSP '01, 2001.
Erdmann, C., “A Candidate Proposal for a 3GPP Adaptive Multi-Rate Wideband Speech Coded,” Proc. Intl. Conf. Acoust., Speech, Signal Processing, ICASSP '01, 2001.
Makhoul, J. et al., “High-Frequency Regeneration in Speech Coding Systems,” Proc. Intl. Conf. Acoust., Speech, Signal Processing, ICASSP '79, pp. 428-431, 1979.
Wakita, H., “Direct Estimation of the vocal Tract Shape by Inverse Filtering of Acoustic Speech Waveforms,” IEEE Trans. Audio and Electroacoust., vol. AU-21, No. 5, pp. 417- 427, Oct. 1973.
Wakita, H., “Estimation of Vocal-Tract Shapes from Acoustical Analysis of the Speech Wave: The State of the Art,” IEEE Trans. Acoustics, Speech, Signal Processing, vol. ASSP-27, No. 3, pp. 281-285, Jun. 1979.
Schroeder, M.R., “Determination of the Geometry of the Human Vocal Tract by Acoustic Measurements”, Journal Acoust. Soc. Am., vol. 41, No. 4, (Part 2), 1967.
Schroeter, J. et al., “Techniques for Estimating Vocal-Tract Shapes from the Speech Signal,” IEEE Trans. Speech and Audio Processing, vol. 2, No. 1, Part II, pp. 133-150, Jan. 1994.
Baharav, Z. et al., “Hierarchical Interpretation of Fractal Image Coding and Its Applications,” Chapter 5, Y. Fisher, Ed., Fractual Image Compression: Theory and Applications to Digital Images, Springer-Verlag, N

Affiliated with

Also associated with

Rating

System for bandwidth extension of narrow-band speech does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for bandwidth extension of narrow-band speech, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for bandwidth extension of narrow-band speech will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4110056