Google Inc.

Mans Gustaf Sebastian Ullberg

Henrik Lundin

Lionel Koenig Gélas

Jesús De Vicente Peña

Alessio Bazzica

Esbjörn Dominique

A participant computing device connected to a teleconferencing session receives mixed audio data from a teleconference computing system orchestrating the session. The mixed audio data comprises a mix of audio captured by other devices connected to the session. The mixed audio and audio captured by the other devices prior to receipt of the mixed audio data are compared to determine that the participant computing device is co-located with at least one of the other devices. Information indicating that some of the other devices are featured devices that most actively contribute to the mixed audio is obtained. Co-location information for each of the featured devices is received. The co-location information is indicative of whether a featured device is co-located with the participant computing device. Based on the co-location information, a determination is made that one of the featured devices is co-located with the participant computing device.

Identifying co-located devices within a teleconferencing session

An audio transmission is received by a participant computing device. The participant computing device is one of a plurality of participant computing devices of a participant cohort that are co-located. Matched filters are generated based on the transmission that are configured to predict at least a portion of audio caused by playback of the transmitted audio signal. Each of the matched filters includes coefficients. An audio signal is captured with an audio capture device. The captured audio signal corresponds to audio produced by playback of the transmitted audio signal with audio output devices of devices of the participant cohort. A matched filter is identified that most accurately predicts the audio signal. A delay estimate is generated based on a predictive contribution of one of the coefficients of the matched filter.

Delay estimation for performing echo cancellation for co-located devices

A first computing device captures audio data via an audio capture device. The audio data comprises probe signals from second computing devices located within the same area. The first computing device and the second computing devices are connected to a teleconference session. Based on the audio data, the first computing device generates a first encoding of the probe signals received. The first computing device receives a second encoding of probe signals received at a second computing device. The first computing device makes a determination that a degree of similarity between the first encoding and the second encoding is greater than or equal to a threshold degree of similarity. The first computing device generates co-location information identifying the second computing device as a co-located device that is located within the same area as the first computing device.

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Stockholm, Sweden

Mans Gustaf Sebastian Ullberg