7. Echo Canceller Convergence Notification

In your Continuous Speech Processing (CSP) application, you can specify whether an echo canceller convergence event is sent to the host application.

Note:

This feature is not supported on SpringWare boards. It is supported on DM3 boards only.

Convergence refers to the point at which the echo canceller has processed enough data to be able to identify the echo component in the incoming signal, and thereby reduce the echo to provide echo-cancelled data to the host.

Use the DM_CONVERGED parameter in dx_setevtmsk( ) to have the firmware send an echo canceller convergence event to the host application.

Using this parameter provides an extra safeguard to help determine when the echo canceller has converged and when the echo-cancelled data is ready for further processing.

The event sent to the host application is called TEC_CONVERGED. Use sr_waitevt( ), sr_enbhdlr( ), or other SRL function to collect an event code, depending on the programming model in use. For more information, see the Standard Runtime Library Programmer's Guide (in the Voice Software Reference).

By default, no event is sent to the host application.

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