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首页> 外文会议>2016 IEEE International Workshop on Acoustic Signal Enhancement >Bi-magnitude processing framework for nonlinear acoustic echo cancellation on Android devices
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Bi-magnitude processing framework for nonlinear acoustic echo cancellation on Android devices

机译：用于Android设备上的非线性声学回声消除的双幅度处理框架

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摘要

This paper presents a new paradigm for acoustic echo control on mobile Android devices. The echo path on these devices has nonlinearities including not only the results of overdriven power amplifiers and miniaturized loudspeakers, but also those caused by hardware audio dynamic range compressor (ADRC). While the former form of nonlinearities was widely investigated in past research, the latter has not yet been taken into account. The ADRC adds extra gains to the echo path and makes it become a fast time-varying system. This presents a great challenge to traditional (both linear and nonlinear) echo cancellation systems. Here we propose a novel bi-magnitude processing framework, which is based on a two-state model for the echo path. The algorithm can deal with the ADRC problem and offers robust control for identification of input nonlinearities. The performance of the proposed approach is evaluated on recordings made in an anechoic chamber using real Android devices.
机译：本文提出了一种在移动Android设备上进行声学回声控制的新范例。这些设备上的回声路径具有非线性，不仅包括过驱动功率放大器和小型扬声器的结果，还包括硬件音频动态范围压缩器（ADRC）引起的结果。尽管在过去的研究中已经广泛研究了前一种非线性形式，但尚未考虑到后者。 ADRC为回声路径增加了额外的增益，使其成为快速时变系统。这对传统的（线性和非线性）回声消除系统提出了巨大的挑战。在这里，我们提出了一种新颖的双幅度处理框架，该框架基于回波路径的两个状态模型。该算法可以处理ADRC问题，并提供鲁棒的控制来识别输入非线性。使用真实的Android设备在消声室内制作的录音中评估了所提出方法的性能。

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