| AVS-P10音频解码器算法分析与定点化 |
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| 引用本文： | 王 实,涂卫平. AVS-P10音频解码器算法分析与定点化[J]. 计算机工程与应用, 2016, 52(18): 92-97 |
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| 作者姓名： | 王 实 涂卫平 |
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| 作者单位： | 1.武汉大学 国家多媒体软件工程技术研究中心，武汉大学 计算机学院，武汉 4300722.武汉大学 深圳研究院，广东 深圳 518057 |
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| 摘 要： | AVS-P10是我国第一部应用于移动环境的音频编解码国家标准。在分析AVS-P10解码算法的基础上，对参考代码进行了精简和封装。针对定点处理器应用需求，对精简后的代码进行了定点化实现和优化。分别采用CMOS评分与SNR指标，对定点解码器的解码质量进行了主、客观测试，并对优化前后的定点解码器的运算效率进行了比对测试。结果表明，提出的AVS-P10定点解码器的解码音质达到与浮点解码信号的音质相当，且运算复杂度明显下降。
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| 关 键 词： | 移动音频 先进音视频编码标准-第10部分（AVS-P10） 定点化 算法优化 |
Algorithm analysis and fixed-point implementation of AVS-P10 audio decoder |
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| WANG Shi,TU Weiping. Algorithm analysis and fixed-point implementation of AVS-P10 audio decoder[J]. Computer Engineering and Applications, 2016, 52(18): 92-97 |
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| Authors: | WANG Shi TU Weiping |
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| Affiliation: | 1.National Engineering Research Center for Multimedia Software, Computer School of Wuhan University, Wuhan 430072, China2.Research Institute of Wuhan University in Shenzhen, Shenzhen, Guangdong 518057, China |
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| Abstract: | AVS-P10 is the first national audio coding standard for mobile applications. This paper reduces and packages the reference source codes of AVS-P10 decoder based on the analysis of algorithm. To meet the demands of applications on fixed-point processor, the fixed-point algorithm of AVS-P10 decoder is implemented and optimized. CMOS as well as SNR is taken to assess the quality of audio signal decoded by the fixed-point decoder. Also, the complexity of the fixed-point decoder is tested. The results indicate that there is no palpable decline of the audio quality between the floating-point and the fixed-point decoder, and the computational complexity significantly decreases. |
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| Keywords: | mobile audio Advanced Audio and Video coding Standard-Part 10（AVS-P10） fixed-point algorithm optimization |
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