A Pitch Detection Algorithm for Ultra-low-bit-rate Vocoder
Ye Li, Jingsai Jiang, Qiuyun Hao, Yanhong Fan, Xiaofeng Ma · 2012
Pitch is one of the most important parameters to describe the speech characteristics.The paper proposed a new pitch detection algorithm for ultra-low-bit-rate vocoder based on dynamic programming as well as frequency-time domain analysis to eliminate the multi-half pitch errors.The algorithm detected the candidate pitches based on auto correlation function firstly and then utilized the dynamic programming and frequency-time domain analysis to get the final pitch.Simulation result showed that the algorithm had a better performance and could eliminate the multi-half pitch errors efficiently.