多路数字混音方案设计

发布时间：2018-04-08 17:46

本文选题：混音　切入点：多媒体会议　出处：《计算机仿真》2014年12期

【摘要】：混音技术是多媒体会议系统中的一个重要环节,极大影响了各用户之间的相互交流。通过对现有算法的总结分析,得出了参与混音的路数和各路语音强度大小是影响混音效果的主要因素。针对上述两个主要问题,提出了一种新的混音模型,在硬件设计上采用多路分组并行处理方式,限制最大混音的路数,并通过自动增益控制电路,控制输入语音信号强度;在软件设计上采用自动门限检测技术和改进的自对齐算法,减少了噪声的引入,避免了溢出检测问题,混音效果自然流畅。可以广泛应用于大规模多媒体会议系统中。
[Abstract]:Mixing technology is an important part of multimedia conference system, which greatly affects the communication between users.Through summing up and analyzing the existing algorithms, it is concluded that the number of paths involved in mixing and the intensity of each channel are the main factors affecting the mixing effect.Aiming at the above two main problems, a new mixing model is proposed. In hardware design, multi-channel packet parallel processing is used to limit the maximum number of mixing paths, and the intensity of input speech signal is controlled by automatic gain control circuit.In software design, automatic threshold detection technique and improved self-alignment algorithm are used to reduce the introduction of noise and avoid the problem of overflow detection, and the mixing effect is naturally smooth.It can be widely used in large-scale multimedia conference system.
【作者单位】：空军工程大学信息与导航学院;
【基金】：国家重点实验室基金项目(ITD-U12003/K1260009)
【分类号】：TN912.3

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