A Post-Filtering for Performance of Differential Microphone Array
Một phương pháp Post-Filtering khi áp dụng lưới microphone vi sai
Abstract
Microphone array (MA) is a perspective technique for speech enhancement, because of its simplicity and low
computation. MA can be decomposed into a concatenation of a spatial filtering, which provides beampattern toward a certain target directional speech source while attenuating noise, interference or third-party speaker from other directions, and a post-filtering, which suppresses the remaining noise at the final output signal. Differential Microphone Array (DIF) is one basic MA, which has many advantages for extracting the desired speech and null-steering to direction of noise. Nevertheless, in real situation, the performance of DIF often deteriorated due to phase error, imprecise the direction-ofarrival (DOA) of interest signal, microphone mismatches or imperfect distribution of MA, which significantly degrade the performance and the speech quality of DIF. In this article, the author proposed a Post-Filtering (PF), which based on the properties of considered recording environment DOA to enhance the speech quality of target speaker and reduce the other non-target speaker at the opposite direction. Experimental results were verified in real scenario with dialogue between two speakers, which stand opposite direction, and show the effectiveness of the suggested PF when compared with the author’s previous work.
References
Brandstein M., Ward D, Microphone Arrays, SpringerVerlag, 2001. XVIII, 398 p. doi:10.1007/978-3-66204619-7.
Benesty J., Chen J. Huang Y, Microphone Array Signal Processing. Berlin, Germany, Springer-Verlag, 2008.240 p. doi:10.1007/978-3-54078612-2.
Benesty J., Chen J., Pan C, Fundaments of Differential Beamforming, Springer, 2016.122 p. doi:10.1007/978-981- 10-1046-0.
Elko G. W., Pong A. T. N, "A steerable and variable first order differential microphone array" Proc IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Apr. 1997, vol. 1. DOI: 10.1109/ICASSP.1997.599609.
Teutsch H., Elko G. W, "First- and second- order adaptive differential microphone arrays", Proc. IWAENC, Sep. 2001, pp. 35–38. DOI:10.1121/1.1646972.
Buck M, "Aspects of first-order differential microphone arrays in the presence of sensor imperfections", European Transactions on Telecommunications, vol. 13, no. 1, pp. 115–122, Mar.-Apr. 2002. DOI:10.1002/ett.4460130206.
Elko G. W., Huang Y., Benesty J, Differential microphone arrays, Audio Signal Processing for Next-Generation Multimedia Communication Systems, MA, Kluwer Norwell, Ed., 2004.
Benesty J., Chen J, "Study and Design of Differential Microphone Arrays", vol. 6, Springer Science & Business Media, 2013. ISBN: 978-3-642-33753-6.
Elko G. W., Pong A. T. N, "A steerable and variable first order differential microphone array", Proc IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), vol. 1, Apr. 1997. DOI: 10.1109/ICASSP.1997.599609.
Elko G. W, Steerable and variable first-order differential microphone array, Patent US 006 041 127 A, Mar. 21, 2000.
Elko G. W., Kubli R. A., Meyer J. M, Audio system based on at least second-order eigenbeams, Patent WO 2 003 061 336 A1, July 24, 2003.
Elko G. W., Meyer J. M, Polyhedral audio system based on at least second-order eigenbeams, Patent US9 197 962 B2, Nov. 24, 2015.
Sena E. D., Hacihabiboglu H., Cvetkovic Z, "On the design and implementation of higher-order differential microphones", IEEE Trans. Audio, Speech, Lang. Process. 20, 162–174 (2012). DOI: 10.1109/TASL.2011.2159204.
Mabande E., Schad A., Kellermann K, "Design of robust superdirective beamformers as a convex optimization problem", Proc. IEEE Int. Conf. Acoust. Speech Signal Process. (ICASSP-09), pp. 77-80, 2009-Apr. DOI: 10.1109/ICASSP.2009.4959524.
Huang G., Benesty J., Cohen I., Chen J, "Differen-tial beamforming on graphs", IEEE/ACM Trans. Audio, Speech, Lang. Process. 28(1), 901–913 (2020). DOI: 10.1109/TASLP.2020.2973795.
Bernardini A., Antonacci F., "Sarti A. Wave digital implementation of robust first-order differential microphone arrays", IEEE Signal Process. Lett. 25(2), 253–257 (2017). DOI: 10.1109/LSP.2017.2787484
Borra F., Bernardini A., Antonacci F., Sarti A, "Uniform linear arrays of first-order steerable differential microphones", IEEE/ACM Trans. Audio, Speech, Lang. Process. 27(12), 1906–1918 (2019). DOI: 10.1109/TASLP.2019.2934567
Borra F., Bernardini A., Antonacci F., Sarti A, "Efficient implementations of first-order steerable differential microphone arrays with arbitrary planar geometry", IEEE/ACM Trans. Audio, Speech, Lang. Process. (2020). DOI: 10.1109/TASLP.2020.2998283.
Huang G., Chen J., Benesty J, "On the design of robust steerable frequency-invariant beampatterns with concentric circular microphone arrays", Proc. IEEE ICASSP - Calgary, 2018, pp. 506–510. DOI: 10.1109/ICASSP.2018.8461297
Tiana-Roig E., Jacobsen F., Grande E. F,"Beamforming with a circular microphone array for localization of environmental noise sources", J. Acoust. Soc. Am., 128(6), 3535–3542 (2010). https://doi.org/10.1121/1.3500669.
Benesty J., Chen J, Study and design of differential microphone arrays, Springer-Verlag, Berlin, Germany, 2012. ISBN: 978-3-642-33753-6.
Huang G., Chen J., Benesty J, "Design of planar differential microphone arrays with fractional orders", IEEE/ACM Trans. Audio, Speech, Lang. Process. 28, 116–130 (2019). DOI: 10.1109/TASLP.2019.2949219.
Benesty J., Cohen I., Chen J, Array processing-Kronecker product beamforming, Springer-Verlag, Berlin, Germany, 2019. ISBN: 978-3-030-15600-8.
Cohen I., Benesty J., Chen J, "Differential Kronecker product beamforming", IEEE/ACM Trans. Audio, Speech, Lang. Process. 27(5), 892–902 (2019). DOI: 10.1109/TASLP.2019.2895241.
Buchris Y., Cohen I., Benesty J., Amar A, "Joint sparse concentric array design for frequency and rotationally invariant beampattern", IEEE/ACM Trans. Audio, Speech, Lang. Process. 28, 1143–1158 (2020). DOI: 10.1109/TASLP.2020.2982287.
Stolbov M., Tatarnikova M., The Q.T. (2018), Using Dual-Element Microphone Arrays for Automatic Keyword Recognition, Karpov A., Jokisch O., Potapova R. (eds) Speech and Computer. SPECOM 2018. Lecture Notes in Computer Science, vol 11096. Springer, Cham. https://doi.org/10.1007/978-3-319-99579-3-68.