Abstract: An input ambisonic audio signal includes multiple channels, each of which is made up of audio data representing sound captured by an ambisonic microphone. A remote audio signal made up of audio data representing sound captured by remote meeting equipment is output by a local loudspeaker. Acoustic echo cancellation is performed on the input ambisonic audio signal by removing the remote audio signal from the input ambisonic audio signal. The acoustic echo cancellation may be performed on ambisonic A-format or B-format encoded audio data, or on an output encoding generated from the B-format encoded audio data. Comfort noise may be generated based on spectral and spatial characteristics of noise in the input audio data, for insertion into the input signal during acoustic echo cancellation. Automatic gain control may be performed across the multiple channels of the input audio signal.

Abstract: A technique for sharing a physical target board over an electronic conference includes transforming live video from a webcam into output video that provides an enhanced view of the physical target board. The output video is shared with one or more computing machines of conference participants to enable such participants to see the enhanced view of the physical target board in real time. The conference participants can thus enjoy enhanced images of the physical board and its content, which would otherwise be difficult or impossible to see.

Abstract: A technique for sharing a physical target board over an electronic conference includes transforming live video from a webcam into output video that provides an enhanced view of the physical target board. The output video is shared with one or more computing machines of conference participants to enable such participants to see the enhanced view of the physical target board in real time. The conference participants can thus enjoy enhanced images of the physical board and its content, which would otherwise be difficult or impossible to see.