Abstract: This document relates to distributed devices teleconferencing. Some implementations can employ adaptive microphone selection based on signal characteristics such as signal-to-noise ratios or speech quality, and/or based on a microphone affinity approach. The selected microphone signals can be synchronized and mixed to generate a playback signal that is sent to a remote device. Further implementations can perform proximity-based mixing, where microphone signals received from devices in a particular room can be omitted from playback signals transmitted to other devices in the same room. These techniques can allow enhanced call quality for teleconferencing sessions where co-located users can employ their own devices to participate in a call with other users.

Abstract: A method and system for securing an anonymous discovery service may include receiving a request from a client device, the request being directed to an anonymous Autodiscover service, identifying a source from which the request originated from within the client device, and responsive to the source being of a first type of sources, transmitting a first response to the client and responsive to the source being of a second type of sources transmitting a second response to the client. The first response does not return a Uniform Resource Locator (URL) to a service endpoint, the second response returns a URL to a service endpoint. Furthermore, the anonymous discovery service may be a discovery service that requires no authentication.

Abstract: There is provided an apparatus comprising: at least one processor; and a memory comprising code that, when executed on the at least one processor, causes the apparatus to: communicate with at least one other apparatus via a network apparatus; receive from the network apparatus for each of said at least one other apparatus an indication of a transmission link quality of a link extending from said at least one other apparatus to the apparatus; and display the received transmission link quality indication(s).

Abstract: Mitigation of nonlinear echoes by dynamic range compression may be provided. An audio output may be evaluated to determine whether nonlinear echoes are interfering with an audio signal. In order to reduce such nonlinear echoes, a dynamic range compression algorithm may be applied to the audio signal prior to output. The signal may be modified according to a compression wave and/or subjected to an attenuation factor.

Abstract: Mitigation of nonlinear echoes by dynamic range compression may be provided. An audio output may be evaluated to determine whether nonlinear echoes are interfering with an audio signal. In order to reduce such nonlinear echoes, a dynamic range compression algorithm may be applied to the audio signal prior to output. The signal may be modified according to a compression wave and/or subjected to an attenuation factor.