公开(公告)号：US20150109406A1

公开(公告)日：2015-04-23

申请号：US14184228

申请日：2014-02-19

Applicant: Microsoft Corporation

Inventor： Pontus Carlsson ,  Magnus Hemmendorff ,  Konrad Hofbauer ,  Sergei Nikiforov ,  David Yuheng Zhao

IPC: H04N19/85 ,  H04N7/14 ,  H04N19/61

CPC classification number: H04N7/147 ,  H04N7/15 ,  H04N19/132 ,  H04N19/164 ,  H04N19/167 ,  H04N19/46 ,  H04N19/59 ,  H04N19/63 ,  H04N19/85

Abstract: A user terminal for participating in video calls comprises: an encoder having a frame size, being the size in pixels at which it encodes frames of video; and a pre-processing stage which supplies a sequence of frames to the encoder at that frame size, each frame comprising at least an image region representing a source video image at a respective moment in time. The pre-processing stage is configured to supply at least some of the frames to the encoder in a modified form, by resizing the source video image to produce the image region of each modified frame with a size smaller than the frame size of the encoder, and combining with a border region such that the modified frame matches the frame size of the encoder. The encoder encodes the frames at the frame size and transmits them to a receiving terminal as part of a live video call.

Abstract translation: 用于参与视频呼叫的用户终端包括：具有帧大小的编码器，其大小为其编码视频帧的像素尺寸; 以及预处理阶段，其以该帧大小向编码器提供一系列帧，每个帧至少包括表示相应时刻的源视频图像的图像区域。 预处理级被配置为通过调整源视频图像的大小以产生尺寸小于编码器的帧大小的每个修改的帧的图像区域，以修改的形式将至少一些帧提供给编码器， 并且与边界区域组合，使得修改的帧与编码器的帧大小匹配。 编码器以帧大小对帧进行编码，并将其作为实时视频呼叫的一部分发送到接收终端。

公开(公告)号：US20140211028A1

公开(公告)日：2014-07-31

申请号：US14242512

申请日：2014-04-01

Applicant: Microsoft Corporation

Inventor： Andrei Jefremov ,  David Yuheng Zhao ,  Pontus Carlsson

IPC: H04N5/232

CPC classification number: H04N5/23264 ,  H04N5/23258 ,  H04N5/23267 ,  H04N5/3454

Abstract: Method, device and computer program product for stabilizing a video signal. A plurality of frames of the video signal are captured using a camera. A motion sensor associated with the camera is used to generate a plurality of samples representing motion of the camera. The samples are used to determine a displacement of the camera between a first time and a second time, wherein the first time corresponds to an exposure time midpoint of a first frame of the video signal and the second time corresponds to an exposure time midpoint of a second frame of the video signal. The determined displacement is used to compensate for motion in the video signal between the first and second frames caused by the motion of the camera, to thereby stabilize the video signal.

Abstract translation: 用于稳定视频信号的方法，设备和计算机程序产品。 使用相机捕获多个视频信号的帧。 使用与相机相关联的运动传感器来产生表示相机运动的多个样本。 样本用于确定相机在第一时间和第二时间之间的位移，其中第一时间对应于视频信号的第一帧的曝光时间中点，而第二时间对应于视频信号的曝光时间中点 视频信号的第二帧。 确定的位移用于补偿由相机的运动引起的第一帧和第二帧之间的视频信号中的运动，从而稳定视频信号。

公开(公告)号：US20150149638A1

公开(公告)日：2015-05-28

申请号：US14194287

申请日：2014-02-28

Applicant: Microsoft Corporation

Inventor： David Yuheng Zhao ,  Markus Vaalgamaa ,  Mattias Nilsson ,  Yariv Trablesi

IPC: H04L12/917

CPC classification number: H04L47/76 ,  G06F9/5011 ,  H04L47/803 ,  H04L47/805 ,  H04L47/808

Abstract: There is disclosed a resource allocation module configured to: allocate a first set of communication event resources for receiving communication event data at the computer device; allocate a second set of communication event resources for transmitting communication event data from the computer device; and reallocate resources from one of said sets to the other of said sets in dependence on an indication of the relative importance of the received communication event data compared to the transmitted communication event data. There is also provided a method and a computer program product.

Abstract translation: 公开了一种资源分配模块，其被配置为：在所述计算机设备处分配用于接收通信事件数据的第一组通信事件资源; 分配用于从计算机设备发送通信事件数据的第二组通信事件资源; 并且根据与所发送的通信事件数据相比所接收的通信事件数据的相对重要性的指示，将资源从所述集合中的一个重新分配给所述集合中的另一组。 还提供了一种方法和一个计算机程序产品。

公开(公告)号：US20150110134A1

公开(公告)日：2015-04-23

申请号：US14184492

申请日：2014-02-19

Applicant: MICROSOFT CORPORATION

Inventor： Ermin Kozica ,  Wei Chen ,  David Yuheng Zhao ,  Christoffer Asgaard Rödbro ,  Jesus de Vicente Peña

IPC: H04L7/00 ,  H04N5/04 ,  H04L29/06

CPC classification number: H04L7/0041 ,  H04L7/00 ,  H04L7/0033 ,  H04L65/601 ,  H04L65/80 ,  H04N5/04 ,  H04N21/4307 ,  H04N21/4392 ,  H04N21/44004

Abstract: A receiver receives a first data stream and a second data stream from a transmitting device over a packet-based communication network, the first data stream being of a first media type (e.g. audio) and the second data stream being of a second media type (e.g. video). The first jitter buffer will buffer each of a plurality of portions of the first data stream as they are received via the receiver, and apply a de-jittering delay before outputting each portion of the first data stream (e.g. audio stream) to be played out through the receiving device. The jitter buffer controller receives information on the second data stream (e.g. video stream), and adapts the de-jittering delay of the first jitter buffer (e.g. audio jitter buffer) in dependence on the information on the second data stream (e.g. information on the video stream).

Abstract translation: 接收机通过基于分组的通信网络从发送设备接收第一数据流和第二数据流，第一数据流是第一媒体类型（例如，音频），第二数据流是第二媒体类型（ 例如视频）。 第一抖动缓冲器将经由接收器接收第一数据流的多个部分中的每一个，并在输出要播放的第一数据流（例如音频流）的每个部分之前应用去抖动延迟 通过接收设备。 抖动缓冲器控制器接收关于第二数据流（例如，视频流）的信息，并且根据关于第二数据流的信息（例如关于第二数据流的信息）来适应第一抖动缓冲器（例如，音频抖动缓冲器）的去抖动延迟 视频流）。