M. Berouti, R. Schwartz, and J. Makhoul, “Enhancement of speech corrupted by acoustic noise,” in Proc. IEEE International Conf. Acoustics, Speech, Signal Processing, pp. 208-211, 1979.
 S. F. Boll, “Suppression of acoustic noise in speech using spectral subtraction,” IEEE Trans. Acoustics Speech Signal Processing, vol. 27, no. 2, pp. 113-120, 1979.
 A. Benyassine, E. Shlomot, H. Y. Su, D. Massaloux, C. Lamblin, and J. P. Petit, “ITU-T recommendation G.729 annex B: A silence compression scheme for use with G.729 optimized for V.70 digital simultaneous voice and data applications,” IEEE Communication Mag., vol. 35, pp. 64-73, 1997.
 F. Beritelli, S. Casale, and A. Cavallaro, “A robust voice activity detector for wireless communications using soft computing,” IEEE J. Select. Areas Commun., vol. 16, pp. 1818-1829, 1998.
 J. H. Chang, N. S. Kim, and S. K. Mitra, “Voice activity detection based on multiple statistical models,” IEEE Trans. Signal Processing, vol. 54, no. 6, pp. 1965-1976, 2006.
 A. Davis, S. Nordholm, and R. Togneri, “Statistical voice activity detection using low-variance spectrum estimation and an adaptive threshold,” IEEE Trans. Audio, Speech, and Language Processing, vol. 14, no. 2, pp. 412-424, 2006.
 J. P. Egan, Signal Detection Theory and ROC Analysis. New York: Academetic, 1975.
 J. M. Gorriz, J. Ramírez, C. G. Puntonet, and J. C. Segura, “Generalized LTR-based voice activity detector,” IEEE Signal Processing Lett., vol. 13, no. 10, pp. 636-639, 2006.
 J. A. Haigh and J. S. Mason, “Robust voice activity detection using cepstral features,” in IEEE TENCON, pp. 321-324, 1993.
 S. Haykin, Communication Systems. New York: Wiley, 1994.
 H. G. Hirsch and D. Pearce, “The AURORA experimental framework for the performance evaluations of speech recognition systems under noisy conditions,” in ISCA ITRW ASR2000, 2000.
 S. M. Kay, Fundamentals of Statistical Signal Processing. Englewood Cliffs, NJ: Prentice-Hall, 1998.
 Q. Li, J. Zheng, A. Tsai, and Q. Zhou, “Robust endpoint detection and energy normalization for real-time speech and speaker recognition,” IEEE Trans. Speech and Audio Processing, vol. 10, no. 3, pp. 146-157, 2002.
 D. M. Jones, Noise. New York: Wiley, pp. 61–95. 1983.
 M. Markzinzik and B. Kollmeier, “Speech pause detection for noise spectrum estimation by tracking power envelope dynamics,” IEEE Trans. Speech and Audio Processing, vol. 10, no. 2, pp. 109-118, 2002.
 E. Nemer, R. Goubran, and S. Mahmoud, “Robust voice activity detection using higher-order statistics in the LPC residual domain,” IEEE Trans. Speech and Audio Processing, vol. 9, no. 3, pp. 217-231, 2001.
 M. Petrou and J. Kittler, “Optimal edge detectors for ramp edges,” IEEE Trans. Pattern Analysis and Machine Intelligence, vol. 13, no. 5, pp. 483-491, 1981.
 R. V. Prasad, A. Sangwan, H. S. Jamadagni, and M. C. Chiranth, “Comparison of voice activity detection algorithms for VoIP,” in Proc. IEEE Symposium on Computer and Communications, vol. 5, pp. 530-535, 2002.
 R. V. Prasad, R. Muralishhankar, S. Vijay, H. N. Shankar, P. Pawelczak, and I. Miemegeers, “Voice activity detection for VoIP-an information theoretic approach” in Proc. IEEE Global Telecommunications Conf., pp. 1-6, 2006.
 L. R. Rabiner and M. R. Sambur, “Voiced-unvoiced-silence detection using the Itakura LPC distance measure,” in Proc, Int. Conf. Acoustics, Speech, Signal Processing, pp. 323-326, 1977.
 R. Tuker, “Voice activity detection using a periodicity measure,” in IEE Proceedings-I, vol. 139, no. 4, 1992.
 J. Ramírez, J. C. Segura, C. Benítez, Á. de la Torre, and A. Rubio, “Efficient voice activity detection algorithms using long-term speech information,” Speech Communication , vol. 42, no. 3-4, pp. 271-287, 2004.
 J. Ramírez, J. C. Segura, C. Benítez, L. Gaucía, and A. Rubio, “Statistical voice activity detection using a multiple observation likelihood ratio test,” IEEE Signal Processing Lett., vol. 12, no. 10, pp. 689-692, 2005.
 J. Shon and W. Sung, “A voice activity detector employing soft decision based noise spectrum adaptation,” in Proc. IEEE ICASSP’ 98, vol. 1, pp. 365-368, 1998.
 J. S. Sohn, N. S. Kim, and W. Y. Sung, “A statistical model-based voice activity detection,” IEEE Signal Processing Lett., vol. 6, no. 1, pp. 1-3, 1999.
 S. G. Tanyer and H. Özer, “Voice activity detection in nonstationary noise,” IEEE Trans. Speech and Audio Processing, vol. 8, no. 4, pp. 478-482, 2000.
 P. D. Welch, “The use of fast Fourier transform for the estimation of power spectra: A method based on time averaging over short, modified periodograms,” IEEE Trans. Audio Electroacoustics, vol. 15, no.2, pp. 70-73, 1967.
 G. D. Wu and C. T. Lin, “A recurrent neural fuzzy network for word boundary detection invariable noise-level environments,” IEEE Trans. Systems, Man, and Cybernetics - Part B, vol. 31, no. 1, pp.84-97, 2001.
 “Digital cellular telecommunications system (Phase 2+); voice activity detector (VAD) for adaptive multi-rate (AMR) speech traffic channels,” ETSI, GSM 06.94 v7.1.1 (ETSI EN 301 708), 1998.
“Speech processing, transmission and quality aspects (STQ); distributed speech recognition; advanced front-end feature extraction algorithm; compression algorithms,” ETSI, v1.1.5 (ETSI ES 202 050), 2002.