Packet loss concealment (PLC) is a tool for enhancing speech degradation caused by poor network conditions or underflow/overflow in audio processing pipelines. We propose a real-time recurrent method that leverages previous outputs to mitigate artefact of lost packets without the prior knowledge of loss mask. The proposed full-band recurrent network (FRN) model operates at 48 kHz, which is suitable for high-quality telecommunication applications. Experiment results highlight the superiority of FRN over an offline non-causal baseline and a top performer in a recent PLC challenge.

翻译：丢包隐藏（PLC）是一种用于改善因网络条件不佳或音频处理管道中上溢/下溢导致的语音质量下降的工具。我们提出了一种实时递归方法，该方法利用之前的输出信号来减轻丢包伪影，且无需预先知道丢包掩码信息。所提出的全频带递归网络（FRN）模型在48 kHz采样率下运行，适用于高质量电信应用。实验结果表明，FRN在性能上优于离线非因果基线方法以及近期PLC挑战赛中的顶尖方法。