Voice distorted and delayed by the communication channel. If nothing is done to remove this echo from the microphone signal before transmitting it, the far-end talker will hear her own Sounds directly emitted from the loudspeaker and their reflections off the room walls, ceiling, floor, furniture, and other near-by objects (the acoustic echo),Īs well as background noise. In addition to the voice of the near-end user, the microphone also picks up Received from the communication channel is played through a loudspeaker. The figure shows one side of a full-duplex communication application in which the acoustic echo problem arises. "The Voice Quality is now superb, better than GSM and maybe as good as PSTN."Īcoustic echo is generated whenever an application plays sound to a loudspeaker and at the same time records sound from a microphone located in the same listening space.Įxamples of such applications are speakerphones, audio and video conferencing, hands-free car kits, and many others. William Westlake, product manager at British Telecom after testing the Microsoft VoIP client with DSP ALGORITHMS AEC plug-in on Windows Mobile 6.0:
What professionals say about our AEC Solutions Where an AEC has an added value, from large multi-microphone installed audio systems to tiny Today, ourĪcoustic echo cancellation solutions are used in all communication and conferencing markets Like no others, improving quality while keeping the robust features intact. Resource consumption, and our AEC solutions have been evolving with market requirements With today's multiple cores and GHz processors, AEC audio quality is more important than
Windows Mobile operating system, and all had to be responsive with good audio quality. Speed of 200 MHz and needed to run a complete VoIP client including the AEC on top of the Back then smartphone application processors used to operate at maximum
On Windows Mobile smartphones back in 2006 when smartphones were dominated by Windows Mobileĭevices. OurĪEC solutions have been used in pioneering projects such as the British Telecom's VoIP client DSP ALGORITHMS has a long history providing reliable acoustic echo cancellation solutions.
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