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http://dx.doi.org/10.5762/KAIS.2012.13.7.3188

An Algorithm on Improving a Pitch Searching by Energy Compensation in a Frame for Vocoder  

Baek, Geum-Ran (Dept. of Information and Telecommunication, Soongsil University)
Min, So-Yeon (Dept. of Information&Communication Seoil University)
Bae, Myung-Jin (Dept. of Information and Telecommunication, Soongsil University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.13, no.7, 2012 , pp. 3188-3193 More about this Journal
Abstract
It is important to search a pitch for vocoder. The major drawback to vocoders is their large computational requirements in searching a pitch and a codebook. In this paper, a simple method is proposed to improve the pitch searching process in the pitch filter almost without degradation of quality. The period of speech signal is emphasized by using Dual Pulse technique, the same type of autocorrelation method, in pitch search. Sometimes the incorrect pitch can be obtained by halving, doubling and trifling, To solve it, before searching a pitch, we estimate energy rate in a frame and compensate envelop of signal with it. By using the proposed algorithm in pitch search, its required computation are reduced and searching pitch is improved.
Keywords
Pitch search; Autocorrelation; Dual pulse technique;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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