See Also: AcousticEchoCanceler Members
Acoustic Echo Canceler (AEC).
Acoustic Echo Canceler (AEC) is an audio pre-processing which removes the contribution of the signal received from the remote party from the captured audio signal.
AEC is used by voice communication applications (voice chat, video conferencing, SIP calls) where the presence of echo with significant delay in the signal received from the remote party is highly disturbing. AEC is often used in conjunction with noise suppression (NS).
An application creates an AcousticEchoCanceler object to instantiate and control an AEC engine in the audio capture path.
To attach the AcousticEchoCanceler to a particular Android.Media.AudioRecord, specify the audio session ID of this AudioRecord when creating the AcousticEchoCanceler. The audio session is retrieved by calling Android.Media.AudioRecord.AudioSessionId on the AudioRecord instance.
On some devices, an AEC can be inserted by default in the capture path by the platform according to the NoType:android/media/MediaRecorder$AudioSource;Href=../../../../reference/android/media/MediaRecorder.AudioSource.html used. The application should call AcousticEchoCanceler.getEnable() after creating the AEC to check the default AEC activation state on a particular AudioRecord session.
See Android.Media.Audiofx.AudioEffect class for more details on controlling audio effects.