关键词: 哼唱检索, 端点检测, 基音提取

Abstract: For searching the target song in real-time, accurately and quickly in a rather large music library by humming music clips, integrating music theory characteristics and digitized representation of a variety of music, this paper presents a method of melody pitch extraction by the period measure improving traditional endpoint detection and integrated approach of Linear Predictive Coding（LPC）and correlation function with clipping method. Experiments show that LPC can reserve glottal excitation signal characteristics and eliminate the influence of the sound tract impulse response and clipping method can reduce the noise interference and cut down calculated amount dramatically. More significantly,  the method increases the veracity of extracting music clips by period measure improving traditional endpoint detection. As a result, the method meets the requirements of accuracy and real-time for extracting melody and target song.

Key words: query by humming, endpoint detection, pitch extraction