| 心理声学模型及其在MP3编码中的应用 |
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| 引用本文： | 张力光,王让定. 心理声学模型及其在MP3编码中的应用[J]. 宁波大学学报(理工版), 2010, 23(3): 27-31 |
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| 作者姓名： | 张力光 王让定 |
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| 作者单位： | 宁波大学,纵横智能软件研究所,浙江,宁波,315211 |
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| 基金项目： | 国家自然科学基金，浙江省自然科学基金 |
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| 摘 要： | 心理声学模型是音频感知编码的核心部分,其直接影响着音频编码的质量及压缩比.基于心理声学的基本原理、绝对听觉阈值、掩蔽效应及临界频带等相关内容,并结合心理声学的数学表达,按照MP3标准编码程序中的各个模块来详细分析算法流程.最后通过相应算法来描述预回声产生机理及其在MP3编码中的抑制方法.
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| 关 键 词： | 心理声学模型 掩蔽效应 MP3编码 预回声抑制 |
Psychoacoustic Model and its Application to MP3 Encoding |
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| ZHANG Li-guang,WANG Rang-ding. Psychoacoustic Model and its Application to MP3 Encoding[J]. Journal of Ningbo University(Natural Science and Engineering Edition), 2010, 23(3): 27-31 |
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| Authors: | ZHANG Li-guang WANG Rang-ding |
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| Affiliation: | (CKC Software Lab,Ningbo University,Ningbo 315211,China) |
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| Abstract: | Psychoacoustic model involves core technology in perceptual audio encoding,and it directly affects the encoding quality and compress radio.This paper first introduces the basic principles of psychoacoustic, mainly including the absolute threshold of hearing,masking effect and critical bands.Then,combining with mathematical model of psychoacoustic,the algorithmic process in accordance with mp3 standard procedure modules is analyzed.In the end,the pre-echo producing mechanism and reducing method in mp3 encoding are described with a given number of experiments. |
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| Keywords: | psychoacoustic model masking effect MP3 encoding pre-echo |
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