Abstract: AMR-WB+ is the newest audio compression standard which is used in 3G mobile communication systems. This paper analyzes the frame error concealment algorithm for pitch delay parameter in AMR-WB+, and gives the scheme of optimization. Experimental results show that, on average, the objective test score of the optimized algorithm is higher than the original algorithm, and the subjective test score of the optimized algorithm is equal to the original algorithm.

Key words: AMR-WB+ standard, audio encoder, error concealment, algorithm optimization

摘要： AMR-WB+是应用于第3代移动通信系统的最新音频压缩编解码标准。分析AMR-WB+中基音延迟参数的帧错误隐藏算法，给出算法优化方案。实验结果表明，优化后的基音延迟参数的帧错误隐藏算法在平均情况下，客观测试得分高于原算法，主观测试得分与原算法相当。

关键词: AMR-WB+标准, 音频编码, 错误隐藏, 算法优化

CLC Number: 

• TP37