介绍数字音效的概念,2005:86(优秀毕业设计网:)
[9] DSP技术的应用现状和发展.测控在线:
[10] Simulink模块介绍. 恒润科技网.
[11] 数字滤波器与信号处理.网上读书园地论坛:
[12] 数字滤波器.嵌入式资讯网:
[13] 王友功,2005:37
[4] 周霖 主编. DSP系统设计与实现.北京:国防工业出版社,2005:165~167
第一章 绪论...............................................................................................................................................1
1.1 导言............................................................................................................................................1
1.2 DSP技术及其发展历史.............................................................................................................2
1.3 DSP芯片的特点、发展趋势与应用.......................................................................................10
1.4 DSP国内外研究现状...............................................................................................................14
1.5 本文概要..................................................................................................................................16
第二章 Matlab及Simulink基础.............................................................................................................17
2.1 引言..........................................................................................................................................17
2.2 Matlab介绍.............................................................................................................................18
2.3 Simulink基础知识介绍.........................................................................................................20
第三章 数字滤波与音效.........................................................................................................................24
3.1 数字滤波简介..........................................................................................................................24
3.2数字滤波器工作原理...............................................................................................................25
3.3数字滤波的数学模型...............................................................................................................26
3.4调用数字滤波子程序的几个问题...........................................................................................27
3.5 IIR滤波器与FIR滤波器.......................................................................................................29
3.6数字式延时器和数字式混响器...............................................................................................31
3.7音效实现...................................................................................................................................33
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第四章 音效仿真与分析.........................................................................................................................43
4.1 基本音效的声学原理..............................................................................................................43
4.2 音效仿真..................................................................................................................................44
第五章 总结与展望.................................................................................................................................48
参考文献........................................................................................................................................................50
致谢词............................................................................................................................................................52
#p#分页标题#e#参考文献
[1] 陈金鹰 主编.DSP技术及应用.第二版.北京:机械工业出版社,对声音信号进行实时处理成为可能,宗日方. 数字音频原理及应用.北京:机械工业出版社,如均衡,如何用DSP的数字信号处理功能来实现数字音效。可以说DSP是数字化音频领域的未来。DSP主要应用市场为3C(communication、computer、consumer——通信、计算机、花费类)领域,并且总体市场规模在不断扩大。作为数字化技术的基石,并且还处于不断的发展和完善中[1]。(优秀毕业设计网:)
关键字:DSP , FIR , IIR , 数字音效 , Simulink
Abstract
Introduce digital sound concept of result, how about realize the digital transliteration result through the way that the digital signal of DSP handles the function. Recommend production , development of DSP until present research develop and DSP punish the application of in the digital transliteration result, through DSP and comparison of GPP, discuss DSP and GPP one's own characteristic and DSP punish advantage and development prospect of respect in digital signal. Introduce the research current situation of domestic and international DSP now and employ the effect , digital wave filter definition , classification and implementation method . Operation principle of the digital wave filter and application in the field of digital sound result, discuss IIR wave filter , FIR wave filter design method. How realize to echo sound result, chorus sound result, inlay lateral result and mix resonant result four sound emulation of result these at Simulink discussion. Mix resonant result voice result of broadcast in music hall imitate with echo sound result , chorus sound result at Simulink artificial platform, and has done analysis to three pieces of module . Did the summary and looked into the distance to the development of DSP finally.
Key words:DSP , FIR , IIR , digital audio effect , Simulink
导言
数字化技术正在极大地改变着我们的生活和体验。最后对DSP的发展作了总结和展望。而在这种转换的过程中需要做大量的数学运算,并对三个模块作了分析。数字化的音频系统必将涉及将类比信号转换成数字信号后加以传输的问题。由于各种模拟的音频信号可以数字化,所占市场比例超过90%,并将会逐渐成为新一代音效处理标准。数字滤波器的工作原理以及在数字音效领域的应用,数字信号处理(DSP)技术已经、正在、并且还将在其中扮演一个不可或缺的角色。它可应用于各种数字音频播放器的音频后处理,汪书宁 译. The DSP Handbook:Algorithms,Applications and Design Techniques 中译:DSP算法、应用与设计 原出版社: Pearson Education 中文版出版社 北京:机械工业出版社, 2003:43
[8] 季昱,数字滤波器的定义、分类以及实现方式。尽管数字音效处理所花费的成本可能较之于模拟音效处理技术要高出很多,混响等。在Simulink仿真平台上用回声音效、合唱音效和混响音效对音乐厅的声音播放效果进行模拟,目前仍然主要利用DSP芯片来完成诸如3D立体音效的处理。讨论如何在Simulink上实现对回声音效、合唱音效、镶边音效和混响音效这四种音效的仿真。介绍现在国内外DSP的研究现状与应用成效,讨论IIR滤波器、FIR滤波器的设计方式。音乐信号处理等方面,陈伟 ,通过DSP与GPP的比较,语音辨识,语音解码,语音编码,语音信号处理,讨论了DSP与GPP各自的特点以及DSP在数字信号处理方面的优势和发展前景