山东大学学报（理学版） ›› 2017, Vol. 52 ›› Issue (3): 82-90.doi: 10.6040/j.issn.1671-9352.2.2016.209
项慨1,2,陈世鸿2*
XIANG Kai1,2, CHEN Shi-hong2*
摘要： 针对恶劣移动音频传输环境下突发连续大量丢帧问题,本文提出一种基于HMM的丢帧隐藏方法,通过分析语音信号在更大范围的上下文关系的统计学变化来选择合适的丢帧隐藏策略。当包丢失时,基于HMM的恢复方法使用状态和密度函数信息,计算丢失帧参数的估计值。实验结果表明:提出的方法相比AVS-P10标准的语音编码器原有方法,客观语音测试PESQ平均分提高约0.33分,主观语音测试CMOS平均分能够提高约0.05分。
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