Method and device for extracting pitch frequency of sound and readable storage medium

Abstract

The invention discloses a method and device for extracting a pitch frequency of a sound and a readable storage medium. The method comprises a step of obtaining a sound signal to be detected and transforming the sound signal to be detected from time domain to frequency domain by a short-time Fourier transform, a step of determining a frequency band range of the sound signal to be detected from thefrequency domain and determining a maximum number of harmonics of the sound signal to be detected according to the frequency band range, a step of carrying out energy intensity detection on each frequency point within the frequency band range, and determining a frequency point a with a highest energy intensity according to an intensity detection result, and a step of judging whether a frequency point to be detected with a maximum point exists according to the frequency point a and the maximum number of harmonics, wherein the frequency point to be detected may be a pitch frequency of the soundsignal to be detected or a harmonic component of the pitch frequency if the frequency point to be detected with a maximum point exists, and finally extracting the pitch frequency from the sound signalto be detected. According to the method for extracting a pitch frequency of a sound provided by the invention, the high accuracy can be realized by using low algorithm complexity.

Description

technical field [0001] The invention relates to the technical field of audio signals, in particular to a method, device and readable storage medium for extracting a pitch frequency of sound. Background technique [0002] The fundamental frequency is referred to as the fundamental frequency. When the sounding body emits sound due to vibration, the sound can generally be decomposed into many simple sine waves. All natural sounds are basically composed of many sine waves with different frequencies. Among them, the sine wave with the lowest frequency That is the fundamental tone, while other sine waves with higher frequencies are harmonics. For example, pitch frequency is a basic feature that can reflect the pitch of a human voice. Generally, to judge whether a person’s singing pitch is correct, it is necessary to extract the pitch of the human voice to obtain the pitch for judgment. [0003] The current methods of pitch frequency detection are time-domain autocorrelation metho...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a method and device for extracting the pitch frequency of sound, and a readable storage medium, aiming to solve the problems of high algorithm complexity and low detection accuracy of the current pitch frequency detection method

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