ارتقاء روش تفریق طیفی موجک با استفاده از آنالیز LPC جهت غنی‌سازی سیگنال‌های صوتی
محورهای موضوعی : مهندسی برق و کامپیوترمصطفی حیدری 1 , احسان نادرنژاد 2 , محمدرضا کرمی ملایی 3
1 - دانشگاه مازندران
2 - دانشگاه مازندران
3 - دانشگاه مازندران
کلید واژه: آناليز LPCتبديل موجكتفريق طيفيغني‌سازي سيگنال صوتينويز,
چکیده مقاله :
در این مقاله، روشي جدید برای غنی‌سازی سیگنال‌های صوتی ارائه شده است. در این روش که مبتنی بر روش تفریق طیفی موجك می‌باشند، از ضرایب پیش‌گویی خطی (LPC) برای تخمین و استخراج نویز استفاده شده است. سپس به مقایسه روش پیشنهادی با روش تفريق طيفي موجك پرداخته‌ایم و مشاهده شده است که روش پیشنهادی به میزان چشم‌گیری، نسبت سیگنال به نویز در سیگنال‌های صوتی آغشته به نویز را در مقایسه با روش تفريق طيفي موجك، بهبود بخشیده است. ضمن اينكه از نظر تست شنوايي نيز وضع به‌همين گونه بوده است.
In this paper, we proposed a new method for speech enhancement. The method is based on wavelet spectral subtraction. We use linear predictive coding (LPC) for noise estimation and extraction. The proposed method was compared with the wavelet spectral subtraction method. The new method increased signal to noise ratio of the noise contaminated speech signal more than wavelet spectral subtraction method. Also, good results have been achieved in auditory test (Mean Opinion Score).
[1] S. Kamath and P. Loizou, "A multi - band spectral subtraction method for enhancing speech corrupted by colored noise," in Proc. of ICASSP’2002, vol. 4, pp. 4160-4164, Orlando, FL, US, May 2002.
[2] S. F. Boll, "Suppression of acoustic noise in speech using spectral subtraction," IEEE Trans. on Acoust. Speech & Signal Processing, vol. 27, no. 2-3, pp. 113-120, Apr. 1979.
[3] M. Berouti, R. Schwartz, and J. Makhoul, "Enhancement of speech corrupted by acoustic noise," in Proc. IEEE ICASSP, vol. 4, pp. 208-211, Washington DC, US, Apr. 1979.
[4] K. Y. Lee, B. G. Lee, and S. Ann, "Adaptive filtering for speech enhancement in colored noise," IEEE Trans. on Signal Processing Letters, vol. 4, no. 10, pp. 277-279, Oct. 1997.
[5] P. S. Whitehead, D. V. Andeson, and M. A. Clements, "Adaptive acoustic noise suppression for speech enhancement," in Proc. IEEE Int. Conf. on Multimedia & Expo., vol. 2, pp. 565-568, Jul. 2003.
[6] Y. Ghanbari and M. R. Karami, "Spectral subtraction in the wavelet domain for speech enhancement," Int. J. of Software and Information Technologies (IJSIT), vol. 1, no. 1, pp. 26-30, Aug. 2004.
[7] D. L. Donoho, "De-noising by soft - thresholding," IEEE Trans. on Information Theory, vol. 41, no. 3, pp. 613-627, May 1995.
[8] I. Y. Soon, S. N. Koh, and C. L. Yeo, "Wavelet for Speech denoising," in Proc. TENCON 97, vol. 2, pp. 479-482, Brisbane, Australia, 2-4 Dec. 1997.
[9] H. Sheikhzadeh and H. R. Abutalebi, "An improved wavelet-based speech enhancement system," in Proc. 7th European Conf. on Speech Communication and Technology, EuroSpeech’01, pp. 1855-1858, Aalborg, Denmark, 3-7 Sep. 2001.
[10] D. L. Donoho and I. M. Johnston, "Ideal spatial adaptive via wavelet shrinkage," Biometrika, vol. 81, no. 3, pp. 425-455, Sep. 1994.
[11] I. M. Johnston and B. W. Silverman, "Wavelet threshold estimators for data with correlated noise," J. Roy. Static. Soc. B, vol. 59, no. 2, pp. 319-351, 1997.
[12] Y. Ghanbari and M. R. Karami-Mollaei, "A new approach for speech enhancement based on adaptive thresholding of wavelet packets," Speech Communication, vol. 48, no. 8, pp. 927-940, Aug. 2006.
[13] J. R. Deller, J. H. L. Hansen, and J. G. Proakis, Discrete-Time Processing of Speech Signals, 2nd edition, IEEE press, 2000.
[14] L. R. Rabiner and R. W. Schafer, Digital Processing of Speech Signals, Prentice Hall, 1978.
[15] J. Tierney, "A study of LPC analysis of speech in additive noise," IEEE Trans. Acoust. Speech and Signal Process., vol. 28, no. 4, pp. 379-389, Aug. 1980.
[16] M. R. Sambur and N. S. Jayant, "LPC analysis/synthesis from speech inputs containing guantizing noise or additive white noise," IEEE Trans. Acoust. Speech and Signal Process., vol. 24, no. 6, pp. 488-494, Dec. 1976.
[17] ي. قنبري، كاهش نويز در سيگنال گفتار با استفاده از موجك، پايان‌نامه کارشناسی ارشد دانشگاه مازندران، 1383.
