对回波抵消技术进行了比较详细的总结，对其原理以及算法流程也进行了认真的归纳，应该是不错的文档

对回波抵消技术进行了比较详细的总结，对其原理以及算法流程也进行了认真的归纳，应该是不错的文档-Echo cancellation technology for a more detailed summary of its principle as well as the algorithm process was also seriously summed up, it should be a good document