一種虛擬三維樹的聲音渲染方法研究
[Abstract]:Tree 3D visualization and tree 3D reconstruction are the research focus of computer virtual reality technology at home and abroad. At present, most scholars focus on the research of 3D tree animation, but the research on tree sound generation and rendering is relatively few. The traditional methods of recording real tree sound or dubbing by professional audio producers have the problem of low matching degree or high labor cost, which can not meet the needs of this study. In order to solve this problem, this paper divides the tree into two parts: tree branches and leaves. By analyzing the relationship between branches and leaves in tree animation, using the method of sound modeling and wave table synthesis, a virtual 3D tree sound rendering method is proposed. The main contributions of this paper are as follows: (1) the generation of branch sound. The main steps are as follows: 1. The frequency of branch sound was obtained by using the Carmen vortex model in aerodynamic sound. 2. Set up a frequency group to get the timbre of a branch. 3. The frequency group is expressed in conjugate form and the random phase is given to all frequencies. The wave table data of tree branches are obtained by inverse Fourier transform. 4. By adding turbulence model to tree branch and wind, the obtained simulated wind speed is used as input condition of wave table transformation, and the sound of tree branch is generated by wave table synthesis. Add window function to the result of tree branch sound generation. 6. The same Zhang Bo table is used for the similar diameter branches to reduce the pretreatment time of the wave meter. The test results of two tree models show that the pretreatment time of tree model 1 is 120 s, and that of tree model 2 is 598s. (2) the sound generation of leaves. The main steps are as follows: 1. By filtering Gao Si white noise to produce pink noise. 2. Test the sound frequency, select the pink noise of the 2000~4000Hz segment as the leaf sound frequency, and use inverse Fourier transform to generate the leaf wave table. 3. According to the relative position relationship between leaves, the number of leaf collision under different wind speed was obtained. 4. 4. A simplified motion model is proposed in which a wave table of a leaf is used to simulate the process of leaf collision and friction. The wind speed simulated by turbulence model is used as input condition and the sound of leaves is generated by wave table synthesis. Two tree models were used to test the results. The results showed that the time of leaf wave table formation was obviously increased with the increase of wind speed. The tree model 1 had 285 leaves and the time of wave table formation was 5.9 seconds. Tree model 2 has 6420 leaves and the time of wave table formation is 367s. In this paper, using Carmen vortex and pink noise as the tree sound model, the tree animation matching is tested. The experimental results show that the tree leaves and leaf sound generated by this method can be changed according to the tree branch and leaf position in the tree animation. The tree sound which matches the animation effect is rendered, and the tree sound with different sound effects can be obtained according to the change of the observation point position, which meets the requirements of the subject.
【學位授予單位】:西北農(nóng)林科技大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TP391.9
【相似文獻】
相關期刊論文 前10條
1 ;新型工業(yè)示波表124[J];電子質量;2003年07期
2 周玉鴻;數(shù)字示波表組成分析[J];今日電子;2005年01期
3 知元;;國產(chǎn)手持數(shù)字示波表現(xiàn)狀分析[J];今日電子;2006年07期
4 唐軍;B系列萬用示波表[J];電信快報;1998年11期
5 楊法;;漫談駐波表[J];現(xiàn)代通信;2009年04期
6 ;福祿克Fluke 190 SeriesII便攜式四通道示波表[J];電子測試;2011年03期
7 韓霜;;Fluke 190 SeriesⅡ便攜式四通道示波表具備更高性能和安全等級[J];世界電子元器件;2011年03期
8 唐軍;福祿克推出萬用示波表[J];現(xiàn)代通信;1999年01期
9 ;福祿克最新推出190系列萬用示波表[J];國外電子測量技術;1999年06期
10 李貽濤;邢曉敏;;電子類課程實驗用便攜示波表的設計[J];電氣電子教學學報;2013年05期
相關會議論文 前2條
1 邱渡裕;田書林;葉們;;高性能手持示波表低功耗設計的關鍵技術[A];2008中國儀器儀表與測控技術進展大會論文集(Ⅲ)[C];2008年
2 葉們;王厚軍;田書林;;手持數(shù)字示波表技術研究[A];第三次全國會員代表大會暨學術會議論文集[C];2002年
相關重要報紙文章 前10條
1 肖江;光動能電波表 彰顯技術與美的融合[N];中國經(jīng)營報;2007年
2 韓哲;光動能電波表因環(huán)保而受寵[N];北京商報;2008年
3 本報實習記者 占長孫;電波表 離“大眾化”還有一段路[N];消費日報;2012年
4 本報實習記者 占長孫;電波表“親近”年輕消費者[N];消費日報;2012年
5 程武;電波表掀起高科技革命[N];中華工商時報;2007年
6 曦和;創(chuàng)新無限 挑戰(zhàn)完美[N];國際商報;2007年
7 馬霞;技術與美的交融[N];科技日報;2007年
8 任荃;國產(chǎn)電波表精確每一秒[N];文匯報;2003年
9 本報記者 張莉;依波表:以非凡創(chuàng)新打造恒久品牌[N];國際商報;2006年
10 程武;戶倉敏夫:信息化時代計時工具化蛹為蝶[N];中華工商時報;2007年
相關碩士學位論文 前10條
1 林清;低功耗示波表設計[D];電子科技大學;2013年
2 張晗;500MHz帶寬手持式示波表的硬件設計[D];電子科技大學;2015年
3 豆永輝;高精度數(shù)字駐波表的設計與實現(xiàn)[D];山東大學;2016年
4 周穎;300MHz手持示波表隔離通道設計[D];電子科技大學;2016年
5 覃;;手持式示波表數(shù)據(jù)處理模塊的軟件設計[D];電子科技大學;2016年
6 胡軼;時域反射測量技術在示波表中的應用[D];電子科技大學;2008年
7 陳金鷹;便攜式數(shù)字示波表設計[D];電子科技大學;2001年
8 汪一;便攜式數(shù)字存貯示波表的研究與實現(xiàn)——外圍控制芯片研制[D];電子科技大學;2003年
9 蔣薇;數(shù)字存儲示波表的軟件設計[D];電子科技大學;2003年
10 過浩;多通道音樂波表合成器電路的設計與實現(xiàn)[D];東南大學;2006年
,本文編號:2402138
本文鏈接:http://sikaile.net/kejilunwen/ruanjiangongchenglunwen/2402138.html