| DRA算法及其实时解码器设计 |
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| 引用本文： | 马文华,曾庆煜.DRA算法及其实时解码器设计[J].电视技术,2009,33(5). |
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| 作者姓名： | 马文华 曾庆煜 |
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| 作者单位： | 1. 广东外语外贸大学,广东,广州,510630
2. 广东省数字音频重点实验室,广东,广州,510640 |
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| 基金项目： | 广东省科技厅粤港关键领域重点突破项目 |
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| 摘 要： | DRA是一种新的音频编解码标准,其在每声道64 Kbit/s时重建的音质达到ITU-R规定的"人耳不可识别损伤"的主观音质评定.研究了DRA的编码与解码原理,在对解码算法进行了优化的基础上.设计并实现了基于PXA270平台的DRA实时解码器.主观听音测试结果表明.该解码器音质良好.满足实时解码应用的要求.
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| 关 键 词： | 音频解码器 可变分辨率滤波 熵编码 修正离散余弦反变换 |
Coding Technology of DRA and Implementation of Real-time Decoder |
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| MA Wen-hua,ZENG Qing-yu.Coding Technology of DRA and Implementation of Real-time Decoder[J].Tv Engineering,2009,33(5). |
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| Authors: | MA Wen-hua ZENG Qing-yu |
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| Affiliation: | MA Wen-hua1,ZENG Qing-yu2(1.Guangdong University of Foreign Studies,Guangzhou 510630,China,2.Guangdong Province Key Laboratory of Digital Audio,Guangzhou 510640,China) |
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| Abstract: | Digital Rise Algorithm(DRA) is a brand new audio codec specification.According to ITU-R evaluations of multichannel audio codecs,the impairment grade of DRA codec is imperceptible,when 64 Kbit/s per channel.The DRA encode specification and decode specification are researched.The key decode module of DRA is optimized,and finally a PXA270 platform based DRA real-time decoder is designed.According to the evaluation,the audio playback sound quality is good enough and and the design fits the real-time requiremen... |
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| Keywords: | DRA |
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