Research Of Zero-watermarking Algorithm For National Instrumental Music Based On Theme

National instrumental music,as a crystallization of Chinese culture that has been inherited for five thousand years,is gradually going to the world in this Internet age.However,with the expansion of the spread of national instrumental music works and the convenience of communication methods,how to better protect the copyright of national instrumental music works has become an urgent problem to be solved.Digital audio watermarking technology provides an effective way to solve this problem.Based on the analysis and research of the existing digital watermarking solutions for copyright protection,the thesis designs and constructs a theme-based zero-watermark copyright protection solution for national instrumental works that based on the classification of music themes frames and musical instrument frames.The thesis has conducted a more in-depth discussion and research on the solution,and the main contents of the elaboration are as follows:(1)The research background and significance of the paper are given.And the research and development status of digital watermarking and national instrumental music watermarking are summarized.(2)A theme-based zero-watermark protection solution for national instrumental music is designed by the group information of the theme frames and the musical instruments frames.The architecture of the solution is given.The solution includes the preprocessing of the national instrumental music,the construction of zero watermark and the detection of zero watermark,etc.And the design of these parts is outlined.(3)The preprocessing part of the protection solution is designed in detail.Based on the basic audio signal preprocessing model,a preprocessing model of national instrumental music is designed,and algorithms such as signal noise filtering,head and tail silent segment separation,linear scaling and melody pre-emphasis involved in the preprocessing model are designed and implemented.(4)The construction of zero watermark part of the protection solution is designed in detail.Taking the theme feature and the instrument feature as the original features of the watermark,the construction model of zero watermark is designed.And the algorithm of theme feature extraction,instrument feature extraction,feature fusion and copyright image processing in the zero watermark construction model are designed and implemented.(5)The zero watermark detection part of the protection solution is designed in detail.Based on the similarity of zero watermark,the model of zero watermark detection,copyright judgment and auxiliary information generation is designed.And the algorithm of modules such as the zero watermark detection,copyright determination and auxiliary information generation modules are designed and implemented.(6)Assess and analyze of the designed protection solution from effectiveness and robustness.The results show that the solution designed in this paper is highly targeted and applicable to the copyright protection of national instrumental music works.In addition,a summary analysis of the work of the thesis is outlined.