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  • Research Article
  • Open Access

Audio Classification in Speech and Music: A Comparison between a Statistical and a Neural Approach

  • 1Email author,
  • 1 and
  • 1
EURASIP Journal on Advances in Signal Processing20022002:980905

  • Received: 27 July 2001
  • Published:


We focus the attention on the problem of audio classification in speech and music for multimedia applications. In particular, we present a comparison between two different techniques for speech/music discrimination. The first method is based on Zero crossing rate and Bayesian classification. It is very simple from a computational point of view, and gives good results in case of pure music or speech. The simulation results show that some performance degradation arises when the music segment contains also some speech superimposed on music, or strong rhythmic components. To overcome these problems, we propose a second method, that uses more features, and is based on neural networks (specifically a multi-layer Perceptron). In this case we obtain better performance, at the expense of a limited growth in the computational complexity. In practice, the proposed neural network is simple to be implemented if a suitable polynomial is used as the activation function, and a real-time implementation is possible even if low-cost embedded systems are used.


  • speech/music discrimination
  • indexing of audio-visual documents
  • neural networks
  • multimedia applications

Authors’ Affiliations

Department of Electronics for Automation, University of Brescia, Via Branze 38, Brescia, 25123, Italy


© Bugatti et al. 2002