G.729.1和AMR_WB标准的差错控制与错误隐藏技术研究

Research of Error Concealment and Control Based on G.729.1 and AMR_WB

针对无线通信中出现的传输错误和IP网络中由于拥塞出现的丢包情况,ITU的G.729.1标准和3GPP的AMR_WB标准分别采用了相应的丢失帧恢复技术。介绍了两种方法对丢失帧或错误帧的重建和修复过程,并对实验结果进行了比较分析。

In regard to wireless communication transmission errors and IP network packet loss due to congestion,ITU G.729.1 standard and 3GPP standard apply corresponding frame erasure concealment techniques.The frame identification strategy of G.729.1 and state machine model on error concealment of AMR_WB are described in detail,as well as the error concealments performance of two encoders.