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首页> 外文会议>European Signal Processing Conference >Noise-adaptive perceptual weighting in the AMR-WB encoder for increased speech loudness in adverse far-end noise conditions
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Noise-adaptive perceptual weighting in the AMR-WB encoder for increased speech loudness in adverse far-end noise conditions

机译：AMR-WB编码器中的噪声自适应感知加权，可在不利的远端噪声条件下提高语音响度

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摘要

In mobile communications, environmental noise often reduces the quality and intelligibility of speech. Problems caused by far-end noise, in the sending side of the communication channel, can be alleviated by using a noise reducing preprocessing stage before the encoder. In this study, a modification increasing the robustness of the encoder itself to background noise is proposed. Specifically, by using information already present in the encoder, the proposed method adjusts the perceptual weighting filter based on the characteristics of the noise to increase the prominence of the speech over the background noise. To evaluate the performance of the enhancement, the modification is implemented in the adaptive multi-rate wideband encoder and compared to the standard AMR-WB encoder in subjective tests. The results suggest that while the proposed modification increases the loudness of speech without affecting the quality significantly, for some female speakers the standard encoder is preferred over the enhancement.
机译：在移动通信中，环境噪声通常会降低语音的质量和清晰度。通过在编码器之前使用降噪预处理阶段，可以减轻通信通道发送端中由远端噪声引起的问题。在这项研究中，提出了一种提高编码器本身对背景噪声的鲁棒性的修改方案。具体地，通过使用已经存在于编码器中的信息，所提出的方法基于噪声的特性来调整感知加权滤波器，以增加语音相对于背景噪声的突出度。为了评估增强性能，该修改是在自适应多速率宽带编码器中实现的，并在主观测试中与标准AMR-WB编码器进行了比较。结果表明，尽管所提出的修改在不显着影响质量的情况下增加了语音的响度，但对于某些女性扬声器，标准编码器优于增强功能。

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