华中科技大学学报：自然科学版2012，Vol.40Issue(6)：54-58,5.
多带激励声码器的改进双路径基音跟踪算法
Improved two-path pitch tracking algorithm for multiband excitation vocoders
摘要
Abstract
An improved two-path pitch tracki signal to noise ratio （SNR） levels was propose ng algorithm applicable to d to enhance robustness of noisy speech signals at low pitch estimation performance for multiband excitation （MBE） vocoder. The algorithm employed a new constructed difference inequation as the constraint equation, and its difference threshold value could be updated automatically during the pitch tracking process according to the statistical feature of the pitch period length. The experimental results show that the average gross error rate improvement achieves 70% at -5 dB SNR level in white Gaussian noise condition. The algorithm outperforms the conventional algorithm, displaying better adaptability to different speakers and different white Gaussian noise conditions, improving the pitch estimation accuracy obviously especially in serious noise eonditions, thus facilitating more intelligible and more natural synthesized speech.关键词
基音跟踪/多带激励声码器/鲁棒性/约束方程/最佳门限Key words
pitch tracking/multiband excitation (MBE) vocoder/robustness/constraint equation/optimal threshold分类
电子信息工程引用本文复制引用
周群群,马泳,鲁瑞津,王宏远..多带激励声码器的改进双路径基音跟踪算法[J].华中科技大学学报：自然科学版,2012,40(6):54-58,5.基金项目
湖北省自然科学基金资助项目（2009CDB320）. （）
