Abstract: A conference server is configured to receive audio signals associated with active speakers at separate conference endpoints, and to mix the audio signals to form a mixed audio signal. The conference server is further configured to record a mixed audio track comprising the mixed audio signal, and to determine a relative loudness of each of the active speakers for given periods of time. The conference server is also configured to record a plurality of original audio tracks that each comprises the original voice of one or more of the active speakers before mixing, wherein the original voice recorded in each of the tracks at the given periods of time is based on the relative loudness of the active speakers.

Abstract: In an example embodiment, an example method is provided for echo mitigation in a conference call. In this method, a test audio signal is transmitted to a conference endpoint and as a result, an echo associated with the transmittal of the test audio signal is received. One or more parameters of the echo are then identified and an echo mitigation process is selected from multiple echo mitigation processes based on the identified parameters. The selected echo mitigation process is then applied.

Abstract: A conference server is configured to receive audio signals associated with active speakers at separate conference endpoints, and to mix the audio signals to form a mixed audio signal. The conference server is further configured to record a mixed audio track comprising the mixed audio signal, and to determine a relative loudness of each of the active speakers for given periods of time. The conference server is also configured to record a plurality of original audio tracks that each comprises the original voice of one or more of the active speakers before mixing, wherein the original voice recorded in each of the tracks at the given periods of time is based on the relative loudness of the active speakers.

Abstract: In an example embodiment, an example method is provided for echo mitigation in a conference call. In this method, a test audio signal is transmitted to a conference endpoint and as a result, an echo associated with the transmittal of the test audio signal is received. One or more parameters of the echo are then identified and an echo mitigation process is selected from multiple echo mitigation processes based on the identified parameters. The selected echo mitigation process is then applied.

Abstract: In an example embodiment, a control connection is introduced between an adaptive jitter buffer (AJB) and an adaptive bulk delay (ABD) buffer of an echo canceller (ECAN) in an Internet Protocol (IP) conference bridge. The control connection allows the AJB to control the amount of delay inserted by the ABD in the ECAN convolution processor (CP) signal path. The adjustment in ABD delay restores the time alignment of the ECAN internal echo estimate and offsets variations in echo tail delay introduced by network induced AJB delay changes. Time-invariance is preserved in the echo tail path.

Abstract: In an example embodiment, a control connection is introduced between an adaptive jitter buffer (AJB) and an adaptive bulk delay (ABD) buffer of an echo canceller (ECAN) in an Internet Protocol (IP) conference bridge. The control connection allows the AJB to control the amount of delay inserted by the ABD in the ECAN convolution processor (CP) signal path. The adjustment in ABD delay restores the time alignment of the ECAN internal echo estimate and offsets variations in echo tail delay introduced by network induced AJB delay changes. Time-invariance is preserved in the echo tail path.

Abstract: In an example embodiment, an example method is provided for echo mitigation in a conference call. In this method, a test audio signal is transmitted to a conference endpoint and as a result, an echo associated with the transmittal of the test audio signal is received. One or more parameters of the echo are then identified and an echo mitigation process is selected from multiple echo mitigation processes based on the identified parameters. The selected echo mitigation process is then applied.