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研究生:王瑞文
研究生(外文):tony
論文名稱:實體模擬技術運用於撥弦樂器,滑音處理與古琴輸入法之人機介面研究
論文名稱(外文):A New IIR Music Synthesis Method and Its Application to Gu-Chin Music Composition
指導教授:鄭芳炫鄭芳炫引用關係蘇文鈺蘇文鈺引用關係
指導教授(外文):F.S ChengAlvin. W. Y. Su.
學位類別:碩士
校院名稱:中華大學
系所名稱:資訊工程學系碩士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2001
畢業學年度:89
語文別:中文
論文頁數:89
中文關鍵詞:音樂合成無限脈衝響應預估濾波器古琴音樂作曲系統
外文關鍵詞:Music SynthesisIIR(infinite impulse response)Prediction FilterGu-Chin Music Composition
相關次數:
  • 被引用被引用:3
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  • 下載下載:68
  • 收藏至我的研究室書目清單書目收藏:3
在一般的電子音樂合成法中,最常被應用的有波形法(wave table)和調頻法(FM)等各種方法,因為這二種方法已經不能滿足現在越來越嚴苛的品質要求,所以近年來均在以實體模擬方面做為主要的研究;在論文中,我們提出一個簡單的實體模型架構來模擬撥弦樂器的特性出來。
在這一篇論文,提出了一種新的合成方法,用來合成分析撥弦樂器,用的是一個簡單的IIR(infinite impulse response)架構原理;且將此簡單架構運用在中國傳統樂器古琴聲音合成上面,且針對古琴特有的減字譜進行分析了解,搭配IIR合成架構去表現古琴特有的琴韻,並對於樂器本身特有的滑音效果,利用嵌入式滑音架構,來表現出樂器的滑音效果。
在這一篇論文中IIR的架構,包括了預估濾波器(Prediction Filter)和延遲線(delay line),利用回饋式運算將延遲線的訊號拉回當做輸出同時也拿來當做是下一週期的延遲線輸入,在回饋時透過一個IIR filter的運算後求得數值,Prediction filter的係數是利用類神經網路演算法自動去訓練學習獲得;將原始樂器錄製的聲音做為激發訊號(excitation signal),其合成出來的結果已是相當接近原始的音色。
在這篇論文中,提出一套古琴電腦作曲系統,搭配論文中所提的IIR合成系統,能夠模擬出古琴的聲音,進而完成作曲的目地,模擬真人演奏時的情境,讓古琴音樂能展現於世人面前。

Wavetable and FM are two popular methods used in electronic music synthesis. However, these two methods cannot provide satisfactory quality for high performance applications. Physical modeling synthesis becomes ubiquitous and one major research topic recently. It this thesis, a simple analysis/synthesis architecture for plucked-String instrument synthesis is proposed.
An automatic way of analyzing/synthesizing tones produced by plucked-string instruments by with a simple IIR (infinite impulse response) structure is presented. In addition, this method is applied to the synthesis of Chin, a traditional Chinese zither. Therefore, the tablature system used in Chin Music is also studied. Due to the portamento skill usually heard in Chin music, an embedded portamento structure is proposed.
The IIR structure consists a prediction filter and a delay line. The prediction filter uses the data output from the delay line as the input to predict the signal of the next input to the delay line. The delay line input is also the synthetic output. The design of the coefficients for this IIR synthesizer is accomplished by using a neural network based training algorithm. The excitation signal is extracted from the original tones recorded from the target instrument. The results are very close to the original tones.
In this thesis, a computer Aided Chin Music Composition/Synthesis System is constructed. By using the proposed IIR analysis/synthesis model, it can synthesize realistic Chin Music. This system also helps those who can’t play Chins to compose his/her own Chin Music.

摘要 …………………………………………………………………Ⅰ
Abstract ……………………………………………………………Ⅱ
致謝 …………………………………………………………………Ⅳ
目錄 …………………………………………………………………Ⅴ
圖目錄 ………………………………………………………………Ⅶ
表目錄 ………………………………………………………………Ⅹ
第一章 緒論 …………………………………………………………1
1.1 研究背景 …………………………………………………………1
1.2 研究動機 …………………………………………………………4
第二章 合成架構 …………………………………………………… 5
2.1 IIR合成器 ………………………………………………………5
2.2 IIR和DWF的比較 ………………………………………………11
第三章 類神經網路架構 ……………………………………………13
3.1 類神經網路 ……………………………………………………13
3.1.1 類神經網路基本架構 …..…………………………………13
3.1.2 倒傳遞(Back Propagation)演算法 ………………………15
3.1.3 SARPROP類神經網路架構 ………………………………… 18
3.2 用RNN設計預估濾波器(Prediction Filter) ………………21
3.3 多階段的訓練策略 ……………………………………………25
第四章 嵌入式滑音架構 ……………………………………………27
4.1 嵌入式滑音架構 …………………………………………… 27
4.2 設計滑音處理之 值的變化 ……………………………… 30
4.3 滑音所遇問題之處理 ……………………………………… 33
4.3.1 濾波器之階數設計 ……………………………………… 33
4.3.2 低階(lower-order)濾波器所產生的問題……………… 33
第五章 古琴電腦作曲系統 …………………………………………36
5.1 古琴簡介 ………………………………………………………36
5.2 減字符號詳細例子說明 ………………………………………44
5.3 古琴電腦輸入法系統 …………………………………………51
5.4 古琴輸入法系統對應合成系統 ………………………………56
5.5 古琴電腦作曲系統 ……………………………………………62
第六章 撥弦樂器之合成 ………………………………………… 65
6.1 IIR之單音合成結果 ………………………………………… 65
6.2 IIR之滑音合成結果 ………………………………………… 73
6.3 古琴輸入法與電腦作曲系統 …………………………………78
第七章 結論與未來工作 ……………………………………………84
參考書目 …………………………………………………………… 86

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