Method for classifying digital audio automatically
An automatic classification and digital audio technology, applied in speech analysis, speech recognition, instruments, etc., can solve the problems of lack of audio classification methods, poor performance, complex calculations, etc., and achieve easy application, high accuracy, and simple calculation process Effect
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[0037] The present invention will be further described below in conjunction with the drawings and specific embodiments.
[0038] Such as figure 1 Shown is a flowchart of a method for implementing automatic digital audio classification according to an embodiment of the present invention, which specifically includes:
[0039] S1. Pre-processing the audio data, the pre-processing includes: pre-emphasis processing, frame processing and windowing processing;
[0040] S2. Extract audio features. The audio features include: spectrum centroid, spread spectrum, spectrum flatness, spectrum transition parameters, short-term energy, pitch frequency, and Mel frequency cepstral coefficient (MFCC) and MFCC first-order difference; where, the spectrum The flatness takes 23 coefficients to occupy 23 dimensions, the MFCC and its first-order difference each take 10 orders and a total of 20 dimensions, and the rest are each 1 dimension, forming a total of 48-dimensional feature vectors;
[0041] S3. Searc...
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