Analysis of the IP telephone system in the characteristics of echo, and echo with a path for its delay, delay jitter features and so on, the A delay based on the analysis of adaptive echo cancellation design of the new ideas and related algorithms. Introduced the adaptive echo cancellation device The basic structure and the various functional modules, such as: change the order of adaptive filter, voice status detector, the delay count analyzers and NLM S Law controller. This article also discussed in detail in TM S320C6201DSP to achieve for the hardware platform to use in the IP Phone Gateway Adaptive echo cancellation and its IP phone system in the connections. Finally, listed on the adaptive echo canceller The performance test results and analysis of the adaptive advantages of echo cancellation devices to prove that the adaptive echo canceller can be a good solution to IP Telephone system in the echo cancellation problem.

Echo Cancellation in IP Telephone System
........................................\Echo Cancellation in IP Telephone System.pdf

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