中文摘要：

AVS-P10是我国第一部完全自主研发的移动音频编解码国家标准。为适应移动通信环境,实现低码率、高质量的音频传输与重建,在分析现有AVS-P10带宽扩展模块的基础上,提出一种基于相关系数的AVS-P10带宽扩展优化方案。为找出高频重建的最佳频带选择方式,通过计算原始高频频带与各准高频频带的皮尔逊系数绝对值进行最强相关子带选取,并通过判断最高相关系数数值是否低于域值,选择用最强相关准高频子带或白噪声来进行高频重建。实验表明,与原有的AVS-P10带宽扩展算法相比,该方法音频信号的高频重建效果有一定的提高。

英文摘要：

AVS-P10 is the first national standard of mobile audio encoding and decoding which is completely selfdeveloped. An optimized bandwidth extension algorithm of AVS-P10 based on correlation coefficients is proposed to adapt the mobile communication environment and realize low bit rate,high quality audio transmission and reconstruction by analyzing AVS-P10 bandwidth extension module. The algorithm calculated the absolute value of Pearson coefficient between the original high-frequency band and the quasi high-frequency band to search the optimal sub-band selection.Then,it chose the most relevant quasi high-frequency band or white noise for the high frequency band reconstruction by determining whether the highest correlation is lower than the threshold value. Experiments show that the high-frequency audio signal reconstruction effect of this method has significantly improved,comparing with the original AVS-P10 bandwidth extension algorithm.