...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Speech and Audio Proceessing >A joint source-channel speech coder using hybrid digital-analog(HDA) modulation
【24h】

A joint source-channel speech coder using hybrid digital-analog(HDA) modulation

机译：使用混合数模（HDA）调制的联合源通道语音编码器

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A joint source-channel coding system for transmitting speech on a bandlimited additive white Gaussian noise (AWGN) channel is presented. The proposed method uses a hybrid of digital and analog modulation techniques. The digital part of the system consists of a Federal Standard 1016 code-excited linear predictive (FS 1016 CELP) speech coder followed by a rate-3/5 parallel concatenated (turbo) error correcting code. The analog part, which transmits the quantization error due to the FS 1016 CELP coder, consists of a linear encoder and decoder. The advantage of the proposed system is that it achieves excellent rate-distortion/capacity performance that is common in digital systems while maintaining a "graceful degradation" characteristic that is common in analog systems. Comparisons are made with three purely digital systems and an analog system-with all systems operating at the same overall rate. A formal listening test shows that, at high channel SNR, the improved performance of the proposed hybrid system (versus the purely digital systems) is noticeable to the average listener. Finally, an informal listening test indicates that at low channel SNR (where the error correcting code breaks down) the decoded speech of the hybrid system is still intelligible
机译：提出了一种用于在带限加性高斯白噪声（AWGN）信道上传输语音的联合源信道编码系统。所提出的方法使用数字和模拟调制技术的混合。系统的数字部分由联邦标准1016码激励的线性预测（FS 1016 CELP）语音编码器，后跟速率为3/5的并行级联（turbo）纠错码。由FS 1016 CELP编码器传输量化误差的模拟部分由线性编码器和解码器组成。所提出的系统的优点在于，它实现了数字系统中常见的出色的速率失真/容量性能，同时保持了模拟系统中常见的“平滑降级”特性。比较了三个纯数字系统和一个模拟系统，所有系统以相同的总速率运行。正式的聆听测试表明，在高信道SNR的情况下，建议的混合系统（相对于纯数字系统）的性能改善对于普通的聆听者来说是显而易见的。最后，一个非正式的听觉测试表明，在低信噪比的情况下（纠错码失效），混合系统的解码语音仍可理解

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号