Pitch Recognition Based on Cochlear Model
Date Issued
2006
Date
2006
Author(s)
Lin, Ruei-Min
DOI
zh-TW
Abstract
In this paper, an algorithm for pitch recognition is designed. This algorithm is based on a simplified cochlear model. The traditional methods are mainly divided into two categories: one is to utilize and analyze the amplitude of sound in time domain directly; the other is to transform the sound into the frequency domain first, and then do some analysis to recognize the pitch. The operation amount in time domain is relatively small, but mostly it can only detect a single frequency. The second type of methods needs to do the transform first, so the speed is relatively slow. After getting the frequency spectrum, we can apply some algorithm to do the pitch recognition. My algorithm, which is called CM (Cochlear Model), combines the advantages of above-mentioned two kinds of methods. CM utilizes the amplitude of sound directly. Through the simple cochlea physical model, the vibration situation of the BM(basement membrane) in the cochlea can tell the pitch. For the elasticity in the BM is not uniform, we can tell more than one single frequency at the same time.
Subjects
耳蝸
耳蝸模型
基底膜
pitch
pitch tracking
pitch recognition
pitch determination algorithm
PDA
cochlea
cochlear model
basement membrane
BM
Type
thesis
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