本研究利用獨立成份分析法（ Independent Component Analysis，ICA）於可觸式聲
波操控介面上針對同時間不同觸碰事件所產生的混合訊號進行訊號分離。依據獨立成
份分析法的處理步驟，本研究提出三種分析操作程序來對可觸式聲波操控介面下麥克
風截取到的混合訊號實際進行測試，分別為 (一) 多音源輸入訊號直接進入ICA處理
(二) 單音源輸入訊號經頻率區隔分析後進行ICA處理 (三) 單音源輸入訊號經頻率區隔
及高次混合後進入ICA處理。研究結果顯示，透過頻率區隔在可觸式聲波操控介面下對
於非即時性的訊號分析是具有顯著的訊號分離效果。此結果也驗證了獨立成份分析法
可運用在可觸式聲波操控介面上作為混合訊號分離使用。

關鍵字：獨立成份分析法、可觸式聲波操控介面、聲源訊號分離

In this study, we tried to use independent component analysis (ICA) to separate the
mixed signal caused by simultaneous touch events happened on a tangible acoustic interface.
Being in accord with the processing steps of ICA, the procedures we proposed can be divided
into (1) multiple audio inputs for ICA processing, (2) single audio input with frequency
segmentation for ICA processing, (3) single audio input with frequency segmentation and
higher-order mixed for ICA processing. Experimental results show that, using frequency
segmentation for non-real time signal analysis on tangible acoustic interface has remarkable
signal-separating effect. It also proves an idea that independent component analysis can be
used on tangible acoustic interface for mixed-signal separation.
Keywords : independent component analysis, tangible acoustic interface, audio signal separation

Ainhoren, Y., Engelberg, S., & Friedman, S. (2008). The cocktail party problem [instrumentation notes]. Instrumentation & Measurement Magazine, IEEE, 11(3), 44-48. doi: 10.1109/MIM.2008.4534378
Ayari, F., Ksouri, M., & Alouani, A. T. (2013, Jan 20-22). Computer based analysis for heart and lung signals separation. Paper presented at the 2013 International Conference on Computer Medical Applications (ICCMA), Sousse.
Carvalhaes, C.G., Perreau-Guimaraes, M., Grosenick, L., & Suppes, P. (2009, June 28 - July 1). EEG classification by ICA source selection of Laplacian-filtered data. Paper presented at the IEEE International Symposium on Biomedical Imaging: From Nano to Macro (ISBI 2009), Boston, MA.
Christensen, J. E. N., & Godsill, S. J. (2011, Oct. 16-19). Bayesian classification of acoustical waveforms under environmental variability,. Paper presented at the 2011 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, New Paltz, NY.
Chu, B. Y., & Chen, Y. B. (2012, Sept. 18-20). Reduction of bleed-through effect in images of chinese bank items. Paper presented at the 2012 International Conference on Frontiers in Handwriting Recognition (ICFHR), Bari.
Comon, P. (1994). Independent component analysis, a new concept? Signal Processing, 36(3), 287-314. doi: 10.1016/0165-1684(94)90029-9
Crevoisier, A., & Bornand, C. (2008). Transforming daily life objects into tactile interfaces. Paper presented at the 3rd European Conference on Smart Sensing and Context, Zurich, Switzerland.
Crevoisier, A., Bornand, C., Guichard, A., Matsumura, S., & Arakawa, C. (2006). Sound rose: creating music and images with a touch table. Paper presented at the Proceedings of the 2006 conference on New Interfaces for Musical Expression (NIME06), Paris, France.
de Souza Siqueira Versiani, T., Rodrigues, G. F., de Souza, A. C. S., de Matos Moreira, J., & Yehia, H. C. (2012, July 3-4 ). Binary spectral masking for speech recognition systems. Paper presented at the 35th International Conference on Telecommunications and Signal Processing (TSP), Prague.
Elena, M., Omar, A. K. , Stéphane, P., Stefano, C., & Houda, C. D. (2009). Generic framework for transforming everyday objects into interactive surfaces. Paper presented at the 13th International Conference on Human-Computer Interaction. Ambient, Ubiquitous and Intelligent Interaction, San Diego, USA.
Fabiani, M. (2006). Development of a tangible human-machine interface exploiting in-solid vibrational signals acquired by multiple sensors. (Master's thesis).
Harrison, C., & Hudson, S. E. . (2008). Scratch input: creating large, inexpensive, unpowered and mobile finger input surfaces. Paper presented at the Proceedings of the 21st annual ACM symposium on User interface software and technology, Monterey, CA, USA.
Harrison, C., Xiao, R., & Hudson, S. E. (2012). Acoustic barcodes: passive, durable and inexpensive notched identification tags. Paper presented at the Proceedings of the 25th annual ACM symposium on User interface software and technology, Cambridge, Massachusetts, USA.
Hu, C., Tung, K., & Lau, L. (2008). Music wall: a tangible user interface using tapping as an interactive technique. Paper presented at the Proceedings of the 8th Asia-Pacific conference on Computer-Human Interaction, Seoul, Korea.
Hyvärinen, A., & Oja, E. (2000). Independent component analysis: algorithms and applications. Neural Netwworks, 13(4-5), 411-430. doi: 10.1016/s0893-6080(00)00026-5
Liang, T. Y., Wang, T. H., Chou, M. T., & Chen, S. W. (2011, Sept. 18-21). A cloud computing service for fast audio source signal separation. Paper presented at the 2011 IEEE International Workshop on Machine Learning for Signal Processing (MLSP), Beijing, China.
Lopes, P., Jota, R., & Jorge, J. A. (2011). Augmenting touch interaction through acoustic sensing. Paper presented at the Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces, Kobe, Japan.
Pham, D. T., Al-Kutubi, M., Ji, Z., Yang, M., Wang, Z., & Catheline, S. (2005). Tangible Acoustic Interface Approaches. Paper presented at the Proceedings of IPROMS 2005 Virtual Conference.
Polotti, P., Sampietro, M., Sarti, A., Tubaro, S., & Crevoisier, A. (2005, September 20-22). Acoustic localization of tactile interactions for the development of novel tangible interfaces. Paper presented at the Proc. of the 8th Int. Conference on Digital Audio Effects (DAFX-05), Madrid, Spain.
Rebordao, A., Islam Molla, M. K., Hirose, K., & Minematsu, N. (2008, 7-9 July 2008). ICA's suitability assisted by voice activity detection. Paper presented at the International Conference on Audio, Language and Image Processing (ICALIP 2008). .
Sanctis, G. D., Rovetta, D., Sarti, A., Scarparo, G., & Tubaro, S. (2006, September 4-8). Localization of tactile interactions through TDOA analysis: geometric vs. inversion-based method. Paper presented at the 14th European Signal Processing Conference(EUSIPCO 2006), Florence, Italy.
Shigeyuki, H., Yoshinobu, S., & Seiho, H. (2012). Bathcratch: touch and sound-based DJ controller implemented on a bathtub. In A. Nijholt, T. Romão & D. Reidsma (Eds.), Advances in Computer Entertainment (Vol. 7624, pp. 44-56): Springer Berlin Heidelberg.
Stone, J. V. (2002). Independent component analysis: an introduction. TRENDS in Cognitive Sciences, 6(2), 59-64. doi: 10.1016/S1364-6613(00)01813-1
Yang, M., Pham, D. T., Al-Kutubi, M., Ji, Z., & Wang, Z. (2009, June 23-26). A new computer interface based on in-solid acoustic source localization. Paper presented at the 7th IEEE International Conference on Industrial Informatics (INDIN 2009).
謝珮琳(民94). 以獨立成份分析法進行影片文字萃取之研究. (碩士論文), 國立臺灣師範大學. Retrieved from http://etds.lib.ntnu.edu.tw/cgi-bin/gs/ntnugsweb.cgi?o=dntnucdr&i=sid=%22GN0693720011%22.