Echo control optimization

摘要

In one implementation, a conference hosted on a conference bridge that includes an echo control device that classifies the echo return loss of a plurality of endpoints. The endpoints may include endpoints on internet protocol (IP) networks and public switched telephone networks (PSTN). The echo control of the endpoints is controlled independently. An echo classification module calculates the echo return loss value of the associated echo tail of the endpoint and chooses an appropriate echo control mode. If the echo return loss is above a high threshold, a pass through mode is activated. If the echo return loss is below a low threshold, a full echo cancellation mode is activated. If the echo return loss is between the low threshold and the high threshold, an echo suppression mode is activated.

主权项

1. A method, comprising:
receiving, at an echo control device, an input send signal from an endpoint; determining a first echo return loss based on an echo tail of the input send signal; delaying a second determination of a second echo return loss for a predetermined time period; determining the second echo return loss subsequent to the determination of the first echo return loss; determining a high threshold and a low threshold based on a difference between the first echo return loss and the second echo return loss; operating a conference bridge in a pass through mode, due to the second echo return loss being above the high threshold; operating the conference bridge in an echo cancellation mode, due to the second echo return loss being below the low threshold; and operating the conference bridge in an echo suppression mode, due to the second echo return loss being between the low threshold and the high threshold.