Experimental Study On The Tone And Height Of Local Mandarin In Changsha Based On PENTA Model

This paper mainly studies the tone and height of local Changsha mandarin's solidified variation based on PENTA pitch model,and comebined with five-degree model to investigate the characteristics of the pitch of Changsha mandarin's solidified variation.Changsha Mandarin is an interlanguage produced by Changsha dialect native speaker,when they study mandarin.It has two variations,respectively are normal variation and solidified variation.The main distinction between the two variations is the internal diversity of phonetic error.Normal variation's internal diversity of phonetic error is evident,and solidified variation has features like it has stable system,uniform language intuition and unequivocal function.We selects solidified variation which is more immobilized as research object.This article uses the method of experimental phonetics.First,we investigate and collect the recording materials,and then through voice analysis software of Praat to extract pitch data,use PENTA pitch model and five-degree model to extract and analyze the pitch target parameters and pitch characteristic parameters through machine learning.Finally,we can conclude the pitch characters of single syllable,double syllable and focus of solidified variation of local Changsha mandarin.In order to enhance the practical applications of the experiment,on the basis of the analysis of characteristics of pitch,we can synthetic the pitch of solidified variation with the pitch parameters in Changsha mandarin,according to the synthetic situation discriminant learning effect.By modifying parameters and establishing a linear relationship,the speech conversion of mandarin and Changsha local mandarin is performed.This thesis is divided into six chapters,the first chapter is introduction,mainly introduced the research background(the overview of the development of the Chinese prosody model),the research object(Changsha local mandarin solidified variant),the experimental tools(PENTA pitch model),and the research significance of this article and chapter arrangement.The second chapter presents the experimental process,divided into four sections to introduce the experimental steps,respectively is the corpus design,voice recording,the voice and data processing,the first three sections can be regarded as preparation process,data processing is the core part of this study.The third and fourth,the fifth chapter is the core part of the analysis and summary,through the experimental observation and control variables,contrast analysis method,respectively showing the pitch data of words,double word and the focus in the Changsha local mandarin solidified variation,including pitch target parameter,pitch characteristic parameters,and compared with the pitch parameters of related language,sums up the tone categories and the tone value of individual character,tone sandhi patterns of double word,and pitch features of focus,at the same time in various chapters show pitch and pitch target parameter fitting characteristic parameters,and through MOS perception experiment to test synthesized sentences with focus.The sixth chapter,we use three different methods to subsititute the pitch of characteristic parameters to transform nomal mandarin to Changsha mandarin's solidified variation,which are verbatim subsititution,the same tone shares parameters and establishing a linear mapping relationship between nomal mandarin and local mandarin.In addition,we use ABX and MOS perception experiment measurement conversion,and through the establishment of mandarin and curing vaparariant linear mapping relationship,to establish a voice conversion rules provide more efficient and convenient method.The seventh chapter is the summary of the full text,we conclude the results of experiments and forecast the future research.