A novel transcoding algorithm between 3GPP AMR-NB (7.95kbit/s) and ITU-T G.729a (8kbit/s) - 文章详情页

作者：

Xu, Hao (Xu, Hao.) | Bao, Changchun (Bao, Changchun.) (学者：鲍长春)

收录：

EI Scopus

摘要：

In　this　paper,　a　novel　transcoding　algorithm　specially　related　to　codebook　gain　conversion　is　proposed　between　AMR-NB　at　7.95kb/s　and　G.729a.　It　can　bypass　the　gain　predictive　process　and　directly　convert　codebook　gain　parameters.　Additionally,　the　new　gain　parameter　conversion　method　can　be　extended　to　the　other　rate　modes　of　AMR-NB　while　transcoding　with　G.729a.　The　experimental　results　show　that　the　quality　of　transcoded　speech　using　the　proposed　algorithm　is　improved　greatly　and　the　computational　complexity　is　reduced　by　85%　compared　with　DTE　(Decode　then　Encode)　method.　A　5ms　look-ahead　delay　is　avoided　as　well.　Copyright　©　2008　ISCA.

关键词：

Speech communication Speech coding Speech

作者机构：

[ 1 ] [Xu, Hao]Speech and Audio Signal Processing Lab., School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China
[ 2 ] [Bao, Changchun]Speech and Audio Signal Processing Lab., School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China

通讯作者信息：

电子邮件地址：

xuhao2002@emails.bjut.edu.cn

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