An endpoint device for use in a teleconference, comprising: an acquiring unit configured to acquire a media stream for presentation in the teleconference, and to receive information from another device that has received the media stream for presentation and that provides the information to the endpoint device as feedback on whether the media stream is a nuisance to the teleconference, the information comprising a first estimation on whether the media stream is a nuisance to the teleconference; a judging unit configured to decide whether the media stream is the nuisance at least based on the information; a controller configured to control the processing of the media stream to suppress the presentation of the acquired media stream by performing one of disabling the presentation of the media stream, degrading at least one of presenting characteristics and discarding the media stream, in case that the media stream is decided as the nuisance; and a processing unit configured to process the media stream under the control of the controller; wherein the nuisance is a purely audio noise signal or a purely video signal constituted by a person talking to other people not in the conference session with his microphone muted or includes an audio signal and a visual signal constituted by people making irrelevant talk without muting, wherein the nuisance may also come from signal compression and/or transmission over an error-prone channel; wherein the media stream is captured by another endpoint device that includes a camera and a microphone for capturing the media stream, and the endpoint device further comprises: a detector configured to calculate a second estimation on whether the acquired media stream is a nuisance to the teleconference based on at least one of the signal quality and the transmission loss, and a transmitter configured to transmit the second estimation to another device in the teleconference. an acquiring unit configured to acquire a media stream for presentation in the teleconference, and to receive information from another device that has received the media stream for presentation and that provides the information to the endpoint device as feedback on whether the media stream is a nuisance to the teleconference, the information comprising a first estimation on whether the media stream is a nuisance to the teleconference; a judging unit configured to decide whether the media stream is the nuisance at least based on the information; a controller configured to control the processing of the media stream to suppress the presentation of the acquired media stream by performing one of disabling the presentation of the media stream, degrading at least one of presenting characteristics and discarding the media stream, in case that the media stream is decided as the nuisance; and a processing unit configured to process the media stream under the control of the controller; wherein the nuisance is a purely audio noise signal or a purely video signal constituted by a person talking to other people not in the conference session with his microphone muted or includes an audio signal and a visual signal constituted by people making irrelevant talk without muting, wherein the nuisance may also come from signal compression and/or transmission over an error-prone channel; wherein the media stream is captured by another endpoint device that includes a camera and a microphone for capturing the media stream, and the endpoint device further comprises: a detector configured to calculate a second estimation on whether the acquired media stream is a nuisance to the teleconference based on at least one of the signal quality and the transmission loss, and a transmitter configured to transmit the second estimation to another device in the teleconference. a detector configured to calculate a second estimation on whether the acquired media stream is a nuisance to the teleconference based on at least one of the signal quality and the transmission loss, and a transmitter configured to transmit the second estimation to another device in the teleconference.