最新的ITU-T嵌入式变速率语音编码关键技术  

Key Techniques of the Latest ITU-T Embedded Variable Bit-Rate Speech Coding

作　　者：李海婷[1] 范睿[1] 朱恒[1] 刘泽新[1] 鲍长春[1] 贾懋珅[1] 李锐[1] 

机构地区：[1]北京工业大学电子信息与控制工程学院语音与音频信号处理研究室,北京100022

出　　处：《电声技术》2006年第11期50-55,58,共7页Audio Engineering

摘　　要：介绍了ITU-T的新一代语音编码标准G.729.1的编码器、译码器原理,讨论了此标准实现码流嵌入式所采用的关键技术:嵌入式的码激励线性预测编码技术、时域频带扩展技术以及时域混叠抵消的预测变换编码技术,并通过客观评测验证了G.729.1语音编码标准的高性能。The encoder and decoder of ITU-T G.729.1 speech coding standards are introduced. Some key techniques of achieving embedded bit-stream, such as embedded code-excited linear-prediction coding, time-domain bandwidth extension and predictive transform coding that is referred to as time-domain aliasing cancellation are discussed as well. The objective quality tests have shown that the G.729.1 has a very high performance.

关 键 词：语音编码 音频编码 嵌入式编解码器 

分 类 号：TN912.32[电子电信—通信与信息系统]