Abstract: Described is an echo cancellation method including buffering the at least one frame of a first voice signal, the at least one frame of the first voice signal including an echo signal, when the at least one frame of signal is preprocessed, separately obtaining, in a first timing period, the at least one frame of the first voice signal from a buffer and at least one frame of a reference signal matching the at least one frame of first voice signal from a reference signal queue, so that an estimated latency value, between each frame of first voice signal and a corresponding reference signal, remains within a preset range, performing echo cancellation processing on the echo signal in the at least one frame of first voice signal using the at least one frame of reference signal, to obtain a second voice signal, and outputting the second voice signal.

Abstract: This application discloses a link decision-making method, applied to a link decision-making system including first and second user equipment that are in a Voice over Internet Protocol (VoIP) call status, a transit server, and a decision-making computing device. A first link directly connecting the two user equipment and a second link that transits by using the transit server exist between the two user equipment. The decision-making computing device is responsible for making, according to a link quality score of a current sending link between the first and second user equipment, a decision about using the first link or the second link as a subsequent sending link of the first user equipment. According to the link decision-making method provided in this application, it can be ensured that a better link can be selected to transmit a data stream of VoIP, thereby improving the quality of service (QoS) of the VoIP.

Abstract: Described is an echo cancellation method including buffering the at least one frame of a first voice signal, the at least one frame of the first voice signal including an echo signal, when the at least one frame of signal is preprocessed, separately obtaining, in a first timing period, the at least one frame of the first voice signal from a buffer and at least one frame of a reference signal matching the at least one frame of first voice signal from a reference signal queue, so that an estimated latency value, between each frame of first voice signal and a corresponding reference signal, remains within a preset range, performing echo cancellation processing on the echo signal in the at least one frame of first voice signal using the at least one frame of reference signal, to obtain a second voice signal, and outputting the second voice signal.

Abstract: This application discloses a link decision-making method, applied to a link decision-making system including first and second user equipment that are in a Voice over Internet Protocol (VoIP) call status, a transit server, and a decision-making computing device. A first link directly connecting the two user equipment and a second link that transits by using the transit server exist between the two user equipment. The decision-making computing device is responsible for making, according to a link quality score of a current sending link between the first and second user equipment, a decision about using the first link or the second link as a subsequent sending link of the first user equipment. According to the link decision-making method provided in this application, it can be ensured that a better link can be selected to transmit a data stream of VoIP, thereby improving the quality of service (QoS) of the VoIP.

Abstract: A method and an apparatus for calling a terminal to join a conference, related to the field of communications technologies, resolving a problem that a process in which a calling terminal calls a called terminal to join the conference or a called terminal requests joining the conference is complicated. The method includes the following steps: receiving first call request information, where the first call request information carries identification information of the called terminal; and calling the called terminal according to the identification information of the called terminal, so that the called terminal receives a message which is published by another terminal in a current conference and that the called terminal publishes a message to another terminal in the current conference. The method may be applied to calling a terminal to join a conference.

Abstract: A method and an apparatus for calling a terminal to join a conference, related to the field of communications technologies, resolving a problem that a process in which a calling terminal calls a called terminal to join the conference or a called terminal requests joining the conference is complicated. The method includes the following steps: receiving first call request information, where the first call request information carries identification information of the called terminal; and calling the called terminal according to the identification information of the called terminal, so that the called terminal receives a message which is published by another terminal in a current conference and that the called terminal publishes a message to another terminal in the current conference. The method may be applied to calling a terminal to join a conference.