Pitch recognition based on intelligent neural network system

Pitch detection may be used in content-based classification and retrieval of music and audio. Most pitch detection algorithms are based on the relationship between frequency and note; however, when the pitch is hummed by an untrained person, the accuracy of pitch recognition can obviously decline. A new intelligent pitch recognition (IPR) method based on intelligent neural networks is presented. Using the ideas of intelligent neural networks, a complex task of pitch recognition can be divided into several simple ones, each of which can be easily implemented by some simple intelligent neuron. Then a large network built out of those intelligent neurons can solve the original, complex problem and the work is much easier than with traditional neural network methods. Experimental results show it is a good way for pitch recognition.