| SELP 2.4kb/s语音编码算法跳跃帧判决及处理 |
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| 引用本文： | 计哲,李晔,崔慧娟,唐昆.SELP 2.4kb/s语音编码算法跳跃帧判决及处理[J].清华大学学报(自然科学版),2009(8). |
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| 作者姓名： | 计哲 李晔 崔慧娟 唐昆 |
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| 作者单位： | 清华大学电子工程系微波与数字通信技术国家重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(60572081) |
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| 摘 要： | 为解决正弦激励线性预测(SELP)2.4 kb/s语音编码算法中清浊音过渡时合成语音的质量较差的问题,该文利用子带清浊音判决参数量化过程中存在的冗余度,提出了一种跳跃帧判决及处理方法。该方法根据当前帧前后各60个样点的平均能量比值判定当前帧是否为跳跃帧,并利用子带清浊音判决参数量化的冗余度传送跳跃帧信息。解码端根据当前帧是否为跳跃帧对解码端参数采用不同的插值方案。测试结果表明,该方法能够将合成语音的M O S分提高0.004左右。
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| 关 键 词： | 语音信号处理 语音编码 跳跃帧 |
Leaping frame detection and processing with a 2.4 kb/s SELP vocoder |
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| JI Zhe,LI Ye,CUI Huijuan,TANG Kun.Leaping frame detection and processing with a 2.4 kb/s SELP vocoder[J].Journal of Tsinghua University(Science and Technology),2009(8). |
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| Authors: | JI Zhe LI Ye CUI Huijuan TANG Kun |
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| Institution: | State Key Laboratory of Microwave and Digital Communication;Department of Electronic Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | During the transition from an unvoiced frame to a voiced frame,the quality of the synthesized speech is not satisfactory in the SELP 2.4 kb/s speech coding algorithm.A leaping frame detection and processing method was developed to overcome this problem using the redundancy of the quantized sub-band UV(unvoiced/voiced) parameters.In this algorithm,the leaping frame is identified based on the average energy ratio of the first and last sixty samples and expressed by the redundant mode of the quantized sub-band... |
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| Keywords: | speech signal processing speech coding leaping frame |
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