In order to satisfy the needs of the pitch accuracy of WI coder and synthesize phase track correctly,a super resolution pitch detection algorithm named MCAMDF-NCCF-FRAC based on MCAMDF-NCCF is also given to get fractional pitch.

• 为了满足不同环境下WI编码器对基音检测高精度的要求；在合成端更准确地恢复相位轨迹；本文又基于MCAMDF-NCCF算法提出了高精度MCAMDF-NCCF-FRAC基音检测算法以计算分数基音.