首页> 外文会议>European Conference on Speech Communication and Technology v.4; 20010903-20010907; Aalborg; DK >Joint Channel Decoding - Viterbi Recognition For Wireless Applications
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Joint Channel Decoding - Viterbi Recognition For Wireless Applications

机译:联合信道解码-用于无线应用的维特比识别

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We introduce the concept of joint channel decoding and Viterbi recognition, by which the Viterbi recognizer is modified to take into account the confidence in the decoded feature after channel transmission. We present a metric for evaluating such confidence based on soft decision decoding. As a case study, we quantize MFCCs using predictive VQ. The overall source-channel coding scheme operating at a combined rate of 1 kbps is shown to provide good recognition accuracy over a wide range of Rayleigh fading channels.
机译:我们介绍联合通道解码和维特比识别的概念,通过修改维特比识别器,以考虑到通道传输后对解码特征的置信度。我们提出了一种基于软判决解码评估这种置信度的度量。作为案例研究,我们使用预测VQ量化MFCC。显示了以1 kbps的组合速率运行的整体源信道编码方案,可在宽范围的瑞利衰落信道上提供良好的识别精度。

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