Objective Evaluation Of Guqin Timbre By Digital Signal Processing Techniques

Guqin is a cultural treasure bearing the 3000-year history of China and an important heritage of human civilization,the research of Guqin timbre is of great value to the development and inheritance of Guqin.The main purpose of objective evaluation of Guqin timbre is to use digital research methods to analyze and evaluate Guqin timbre,this system can help the public understand objectively and profoundly the Guqin timbre and determine the type and quality of Guqin timbre.The evaluation of Guqin timbre is mainly based on subjective evaluation at present,which is arbitrary and lack of persuasion.Based on the quantitative acoustic signal analysis and pattern recognition theory,this paper presents an objective evaluation method of Guqin timbre.Based on the traditional use of spectrum analysis methods to evaluate timbre,a comprehensive evaluation method combining static and dynamic timbre features was used to perform modeling analysis by selecting specific music pieces with rich timbrial performance.The acoustic characteristics of the collected reference Guqin music signals were analyzed.The Mel Cepstral Coefficients(MFCC)were extracted based on the human auditory system principle and the timbre model(GTM)was established by statistical analysis.Evaluation,based on the standard method,the use of Bayesian likelihood analysis and analysis of the similarity of the Guqin and reference.The experimental results show that the proposed Guqin sound model can objectively describe the timbre characteristics of Guqin.The objective evaluation results are in good agreement with the subjective evaluation results,indicating the validity of the sound evaluation method proposed in this paper.