基于ACELP的嵌入式语音编码算法  

Embedded speech coding algorithm based on ACELP

作　　者：范睿[1] 鲍长春[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实验室,北京100022

出　　处：《通信学报》2007年第10期48-54,共7页Journal on Communications

摘　　要：为实现对激励信号的精细描述,提出了一种基于ACELP模型的嵌入式语音编码算法,该算法通过逐层增加脉冲数以及采用一种新的自适应码书结构,能够保证各层编码的相对独立性以及编码器参数的最佳匹配。与以往基于ACELP模型的嵌入式编码算法相比,实现的编码器能够获得具有嵌入结构的码流,不仅能够保证核心层的合成语音质量,而且在增强层也取得了与对应速率的现有标准编码器相当的合成语音质量。In order to describe the excitation signal more precisely, an embedded speech coding algorithm based on ACELP model was proposed, By adding the number of the pulses in algebraic codebook and using an innovative adaptive codebook structure, the proposed coding algorithm was favorable for finding the best coding parameters for each layer and make different layer independent relatively. Compared to other embedded coding algorithms based on ACELP model, proposed speech coder could acquire an embedded bit stream and ensure the quality of the synthesis speech both on core layer and the enhancement layers.

关 键 词：语音编码 码激励线性预测 嵌入式编码 自适应码书 代数码书 

分 类 号：TN912.3[电子电信—通信与信息系统]