Abstract: Techniques are generally described for catch-up pacing for video streaming. In various examples, a camera may capture first video data representing a physical environment. In some examples, motion in the physical environment may be detected from the first video data. A communication channel may be established with a remote computing device. In some examples, the camera may capture second video data. In various examples, the second video data may be captured during a period of time corresponding to the establishment of the communication channel. An available bandwidth of the communication channel may be determined. The available bandwidth may comprise a first bitrate. Third video data may be captured by the camera. The third video data may be encoded at a second bitrate lower than the first bitrate. The first video data, second video data and third video data may be sent to the remote computing device.

Abstract: A video capture device may include multiple cameras that simultaneously capture video data. The video capture device may include one or more motion sensors that track the motion of the video capture device during video capture. Using the motion data, motion vectors can be calculated and used by an encoder to compress and encode a stream of video data. The motion vectors calculated for one stream of video data can then be used to compress and encode a second stream of video data due to the symmetry of a first camera that captured the first video stream and a second camera that captured the second video stream. The video capture device and/or remote computing resources may stitch together the first and second video streams to generate a panoramic video.

Abstract: Devices, systems and methods are disclosed for improving color resolution in YUV subsampled image signals. Chrominance data may be subsampled using two different techniques and the two different outputs may be interlaced to improve a resulting color resolution as perceived by a viewer. Luminance data may be adjusted in paired frames to improve the perceived color resolution without affecting the perceived luminance values. High edge areas, including high frequency variations in luminance values, may be adaptively desaturated to improve the perceived color resolution of the resulting output.

Abstract: Devices, systems and methods are disclosed for improving color resolution in YUV subsampled signals. Chrominance data may be subsampled using two different techniques and the two different outputs may be interlaced to improve a resulting color resolution as perceived by a viewer. Luminance data may be adjusted in paired frames to improve the perceived color resolution without affecting the perceived luminance values. High edge areas, including high frequency variations in luminance values, may be adaptively desaturated to improve the perceived color resolution of the resulting output.

Abstract: A video capture device may include multiple cameras that simultaneously capture video data. The video capture device and/or one or more remote computing resources may perform video stabilization to the video data to reduce unwanted camera shake. The video capture device may include one or more motion sensors that track the motion of the video capture device. Using the motion data, video stabilization algorithms can be executed on a first video stream to calculate stabilizing adjustments for the video stream. The stabilization adjustments can then be used to stabilize a second video stream due to the fixed positioning of a first camera that captured the first video stream and a second camera that captured the second video stream. The video capture device and/or the remote computing resources may stitch together the first and second video streams to generate a digitally stabilized panoramic video.

Abstract: Various examples are directed to providing thermal management to a computing device. The computing device may receive temperature state data describing a temperature state of the computing device. The temperature state may comprise a first temperature value at a first location at the computing device. The computing device may also receive use state data describing a first use state of the computing device. The first use state may comprise an initial operating condition of a first component of the computing device and an initial operating condition of a second component of the computing device. The computing device may determine that at least one temperature value at the computing device is out-of-range and select a second use state for the computing device. The second use state may comprise at least one of a new operating condition for the first component or a new operating condition of the second component.

Abstract: A ringback detector determines whether ringback by comparing measurements of a characteristic of the received signal, such as the energy of the received signal, to a threshold. The threshold is set initially to a low value and then updated based on the measurements of received signal. The measurements are then compared to the threshold to determine whether ringback is present. An output signal indicative of ringback is generated when ringback is present.

Abstract: An echo suppressor for bi-directional communications includes an echo canceler and a residual echo suppressor having variable gain. The gain of the residual echo suppressor is controlled based on a characteristic, such as the estimated energy, of the residual voice echo, or alternatively the entire residual echo, preferably on a per-frame basis. In some embodiments, the residual voice echo energy is compared against the estimated non-echo energy to determine the required amount of gain to apply so as to attenuate the residual voice echo below a psychoacoustic perception level. In some optional embodiments, comfort noise is added to the output signal after the residual echo suppressor in an amount that corresponds to the amount of signal energy loss through the residual echo suppressor. Thus, in some embodiments, desired voice and background noise (including local background noise and comfort noise) are used to mask the presence of residual echo.