基于时延预测的VoIP抖动缓冲控制算法

发布时间：2018-02-26 13:08

本文关键词： VoIP 时延预测抖动缓冲　出处：《兰州理工大学学报》2014年06期 　论文类型：期刊论文

【摘要】：网络时延抖动是影响VoIP语音质量的重要因素之一.为消除时延抖动,提高VoIP语音质量,提出一种基于时延预测的自适应抖动缓冲控制算法.算法采用AR模型为时延序列建模,通过LMS算法进行时延的一步预测,并根据时延预测值,以缓冲时延最小化为目标,自适应调节缓冲区大小.仿真试验结果表明,该算法在网络平稳时,取得了较小的缓冲时延,在网络状况突发时,具有较快的收敛速度,可以有效提高VoIP语音质量.
[Abstract]:Network delay jitter is one of the important factors affecting VoIP speech quality. In order to eliminate delay jitter and improve VoIP speech quality, an adaptive jitter buffer control algorithm based on delay prediction is proposed. The LMS algorithm is used to predict the delay in one step. According to the prediction value of the delay, the buffer size is adjusted adaptively to minimize the buffer delay. The simulation results show that the algorithm achieves a smaller buffer delay when the network is stationary. When the network burst, it has a fast convergence speed, which can effectively improve the VoIP speech quality.
【作者单位】：空军工程大学信息与导航学院;
【基金】：国家自然科学基金(61202490)
【分类号】：TN916.5

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