Microsoft Technology Licensing, LLC

Skype Limited

Sergey Sablin

Ming-Chieh Lee

Chih-Lung Lin

You Zhou

Sergey Silkin

David Yuheng Zhao

Gary Joseph Sullivan

Mattias Nilsson

Sergei Nikiforov

Pontus Carlsson

Magnus Hemmendorff

Matthieu Michel Jean-Alexis Moinard

Victor Miguel Barbero

Amy Lu

Adriana Dumitras

Andrei Jefremov

A format for use in encoding moving image data, comprising: a sequence of frames including plurality of the frames in which at least a region is encoded using motion estimation; a respective set of motion vector values representing motion vectors of the motion estimation for each respective one of these frames or each respective one of one or more regions within each of such frames; and at least one respective indicator associated with each of the respective frames or regions, indicating whether the respective motion vector values of the respective frame or region are encoded at a first resolution or a second resolution.

Representing motion vectors in an encoded bitstream

Video data is received at a decoding device. An encoded first frame of the video data is received with a current frame description for the first frame comprising: an identifier of the first frame, and an indicator of a storage location at the receiving device for the first frame and its frame identifier. An encoded second frame of the video data is also received with at least one reference frame description for the second frame comprising: a reference frame identifier, and an indicator of said storage location. This allows the decoding device to check that the correct reference frame for decoding the second frame is stored thereat. Corresponding encoding operations are also disclosed.

Loss detection for encoded video transmission

Multiple data streams are transmitted from a transmitting device via an end-to-end or process-to-process channel to a receiving device. At the transmitting device a media data stream is generated. A maximum packet size for another data stream is determined based on a determined end-to-end or process-to-process bandwidth and using playout information pertaining to the media data, which conveys a desired playout rate of the media data. At the transmitting device, based on the determined maximum packet size, a plurality of data packets of the other data stream is generated, each having a packet size no more than the determined maximum. The media and other data streams are multiplexed onto the channel at the transmitting device, thereby transmitting both of the data streams from the transmitting device to the receiving device via the same channel.

Multiplexing data

Disclosed herein are exemplary embodiments of innovations in the area of encoding pictures or portions of pictures and determining whether and how certain encoding operations should be performed and flagged for performance by the decoder in the bitstream. In particular examples, various implementations for selectively encoding picture portions (e.g., blocks) in a skip mode (e.g., as in the skip mode of the H.265/HEVC standard) are disclosed. Embodiments of the disclosed techniques can be used to improve encoder efficiency, decrease overall encoder resource usage, and/or improve encoder speed. Such embodiments can be used in encoder modes in which efficient, fast encoder performance is desired (e.g., during encoding of live events, such as video conferencing).

Adaptive skip or zero block detection combined with transform size decision

A transmitting device for generating a plurality of encoded portions of a video to be transmitted to a receiving device over a network configured to: receive an error message over a feedback channel from the receiving device indicating at least one of said plurality of encoded portions that has been lost at the receiving device; encode a recovery portion responsive to said receiving said error message; and transmit said recovery portion to the receiving device over said network; wherein said error message includes information pertaining to a decoded portion successfully decoded at the receiving device and said recovery portion is encoded relative to said decoded portion.

Video coding

An input of an encoder receives moving image data comprising a sequence of frames to be encoded, each frame comprising a plurality of blocks in two dimensions with each block comprising a plurality of pixels in those two dimensions. A motion prediction module performs encoding by, for at least part of each of a plurality of said frames, coding each block relative to a respective reference portion of another frame of the sequence, with the respective reference portion being offset from the block by a respective motion vector. According to the present disclosure, the moving image data of this plurality of frames comprises a screen capture stream, and the motion prediction module is configured to restrict each of the motion vectors of the screen capture stream to an integer number of pixels in at least one of said dimensions.

Encoding screen capture data

Method, device and computer program product for stabilizing a received video signal. A plurality of frames of the video signal is captured using a camera. The video signal is transmitted as an encoded bit stream. Displacement of the camera between successive frames is determined from a motion indication in the bit stream. The determined displacement is used to compensate for motion in the video signal between successive frames caused by the motion of the camera, to thereby stabilize the video signal.

Growing community of inventors

Bromma, Sweden

Sergey Sablin