tailieunhanh - Báo cáo hóa học: " Research Article Adaptive Linear Prediction Filtering in DWT Domain for Real-Time Musical Onset Detection"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Adaptive Linear Prediction Filtering in DWT Domain for Real-Time Musical Onset Detection | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2011 Article ID 650204 10 pages doi 2011 650204 Research Article Adaptive Linear Prediction Filtering in DWT Domain for Real-Time Musical Onset Detection Leonardo Gabrielli Francesco Piazza and Stefano Squartini 3MediaLabs Department of Bioengineering Electronics and Telecommunications Universita Politecnica delle Marche 60121 Ancona Italy Correspondence should be addressed to Stefano Squartini Received 15 September 2010 Revised 30 December 2010 Accepted 11 February 2011 Academic Editor Federico Fontana Copyright 2011 Leonardo Gabrielli et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Onset detection is a typical digital signal processing task in acoustic signal analysis with many applications as in the musical field. Many techniques have been proposed so far which are typically reliable in terms of performances but often not suitable to real-time computing for example they require knowledge of the whole piece to perform optimally or they are too computationally intensive for most embedded processors. Up to the authors knowledge the real-time implementation problem for musical onset detection has been scarcely addressed within the literature which has motivated them to propose a scalable and computationally efficient algorithm with good detection capabilities. Comparison with other techniques and porting to a real-time embedded processor are discussed as well provided experimental results seem to confirm the effectiveness of the approach. 1. Introduction Onset detection is a fundamental task in many music DSP scenarios. Some of these have no critical time constraints such as database queries content retrieval data mining and so forth. Other applications have critical real-time .

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