| 频谱恢复技术综述 |
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| 引用本文： | 刘嘉龑,刘佩林,孙军.频谱恢复技术综述[J].电声技术,2005(4):46-50. |
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| 作者姓名： | 刘嘉龑 刘佩林 孙军 |
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| 作者单位： | 上海交通大学,图像通信与信息处理研究所,上海,200030;上海交通大学,图像通信与信息处理研究所,上海,200030;上海交通大学,图像通信与信息处理研究所,上海,200030 |
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| 摘 要： | 频谱恢复(SBR)压缩技术能够极大地提高感知音频编码器的压缩效率，并且已成为MPEG-4 version 3的音频频谱扩展标准，在许多场合得到了应用。采用SBR技术避免了编码器对音频信号高频部分的编码与传输，在接收端重构高频部分，从而在低比特率条件下能得到更高品质的音频信号。文中主要介绍SBR技术的、原理、特点及其应用。
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| 关 键 词： | 频谱恢复 低比特率 音频编码 压缩 |
| 文章编号： | 1002-8684(2005)04-0046-05 |
| 修稿时间： | 2004年11月18 |
Overview of Spectral Band Replication |
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| LIU Jia-yan,LIU Pei-lin,SUN Jun.Overview of Spectral Band Replication[J].Audio Engineering,2005(4):46-50. |
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| Authors: | LIU Jia-yan LIU Pei-lin SUN Jun |
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| Abstract: | Spectral band replication (SBR) is a novel technology, which significantly improves the compression efficiency of perceptual audio codecs. SBR has been chosen as Band Extension for MPEG-4 Version 3 audio standardization and now enjoys many applications. SBR takes off from the encoder the burden of encoding and transmitting high frequency components, thus allowing for a much higher audio quality at low bit rates. The development, principle, characteristics as well as the current and future applications of SBR are introduced in this paper. |
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| Keywords: | Spectral Band Replication (SBR) low bitrates audio coding compression |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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