Controlling echo in a wideband voice conference

摘要

In one embodiment, an echo canceller configured to cancel echo in a wideband voice conference is provided. A double-talk condition may be when a plurality of users are speaking substantially simultaneously. When a double-talk condition is detected in the wideband conference, a high-frequency process is enabled and used to process signals in the high band to reduce echo. Accordingly, echo in the high band may not be produced by end devices being used by the users' speaking. Also, the users speaking have the echo cancelled in the low band and substantial echo does not result. This results in the users speaking experiencing the conference in the narrowband. The other users that are not speaking, however, continue to receive wideband signals. The users not speaking also continue to have echo cancellation performed for the high band and low band because these users are not speaking and thus attenuation of their voices is not a consideration.

主权项

1. A method comprising:
receiving, at a device, an incoming voice signal from a remote source in a wideband conference, wherein the incoming voice signal includes a low band and a high band; detecting a double talk condition at the device, wherein the double talk condition is due to a local voice signal being originated by a local user at a same time the incoming voice signal is received; and based on detecting the double talk condition, processing, by the device, the incoming voice signal and the local voice signal to reduce an echo in an outgoing voice signal that includes the local voice signal, wherein processing includes:
disabling an attenuation of an outgoing voice signal,enabling a high frequency processor, the high frequency processor:
removing the high band from the incoming voice signal, andallowing the low band associated with the incoming voice signal to pass through the high frequency processor, andcanceling, without use of an adaptation signal, an echo generated due to the low band associated with the incoming voice signal that is passed through the high frequency processor.