CAJ | 학술논문

针对钢琴音符频率跨度广，对音符的识别要求高的情况，本文提出了一种利用内插进行升采样的方法。充分利用了插零算法的计算量小，效果显著的优点，提高了原有的采样率，并设计相应低通滤波器进行滤波处理，结合三电平中心削波的自相关法对钢琴音符频率进行检测识别。计算机仿真的检测结果基本达到预期目标，相比内插前较大地提高了钢琴的音高识别能力，满足了识别要求。
침대강금음부빈솔과도엄，대음부적식별요구고적정황，본문제출료일충이용내삽진행승채양적방법。충분이용료삽령산법적계산량소，효과현저적우점，제고료원유적채양솔，병설계상응저통려파기진행려파처리，결합삼전평중심삭파적자상관법대강금음부빈솔진행검측식별。계산궤방진적검측결과기본체도예기목표，상비내삽전교대지제고료강금적음고식별능력，만족료식별요구。
The scope of the piano note frequency is very large, and there is strict requirement with pitch identification. This paper proposes a method based on interpolation for up-sampling, ful y using its less calculation and marked effect. It raises sampling rate as wel as a specific design for low pass filter in this paper, and detects the pitch with three-level center clipping autocorrelation function. By means of computer simulation, this method achieves the anticipated purpose basical y. It is proved by experimental results that the proposed approach is applicable to enhance the capability of the piano pitch identification, comparing with that before interpolation, which satisfy the requirement stated above effectively.