文章基本信息

标题：Bandwidth Extension Method Based on Spectral Envelope Estimation
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作者：Hang, Bo ; Hu, Ruimin ; Dong, Shi 等
期刊名称：Journal of Multimedia
印刷版ISSN：1796-2048
出版年度：2011
卷号：6
期号：3
页码：269-276
DOI：10.4304/jmm.6.3.269-276
语种：English
出版社：Academy Publisher
摘要：In current communication system, high quality audio signal is supposed to be provided with low bit rate and low computational complexity. This paper proposed a novel audio coding bandwidth extension method, which can improve decoded audio quality with increasing only a few coding bits per frame and a little computational complexity. This method calculate high-frequency synthesis filter by using codebook mapping method, and transmit only quantified gain corrections in high-frequency part of multiplexing coding bit stream. The preliminary test show that this method can provide comparable audio quality with lower bit consumption and computational complexity compared to the high frequency regeneration of AMR-WB+.
关键词：bandwidth extension;audio coding;spectral envelope estimation