8-64kbit/s super-wideband embedded speech and audio coding algorithm - 文章详情页

作者：

Jia, Mao-Shen (Jia, Mao-Shen.) | Bao, Chang-Chun (Bao, Chang-Chun.) (学者：鲍长春) | Li, Rui (Li, Rui.)

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EI Scopus PKU CSCD

摘要：

Based　on　the　international　telecommunication　union　telecommunication　standardization　sector　(ITU-T)　recommendation　G.729.1　and　modified　modulated　lapped　transform　(MLT)　coding,　a　super-wideband　embedded　variable　bit-rate　speech　and　audio　coding　algorithm　was　proposed,　the　bit-rates　of　this　codec　was　from　8kbit/s　to　64kbit/s.　The　information　in　the　frequencies　of　0-7　kHz　was　encoded　by　G.729.1　codec　at　8-32kbit/s,　the　information　in　the　frequencies　of　7-14　kHz　was　encoded　by　the　transform　coding　at　36,　40　and　48kbit/s,　and　G.729.1　residual　signal＇s　MDCT　(modified　discrete　cosine　transform)　was　encoded　by　the　transform　coding　at　56　and　64kbit/s.　The　objective　and　subjective　listening　tests　show　that　this　codec　has　good　performance　compared　with　Terms　of　Reference　given　by　ITU-T.

关键词：

Audio signal processing Discrete cosine transforms Speech coding Speech processing Telecommunication industry

作者机构：

[ 1 ] [Jia, Mao-Shen]Speech and Audio Signal Processing Lab., School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Bao, Chang-Chun]Speech and Audio Signal Processing Lab., School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Li, Rui]Speech and Audio Signal Processing Lab., School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China

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