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Video conference rate matching

A technology of video conferencing and video streaming, applied in the direction of video conferencing system, transmission of TV signal through single/parallel channel, digital transmission system, etc.

Active Publication Date: 2011-11-16
MICROSOFT TECH LICENSING LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Intranet clients may only be able to encode and receive at CIF resolution (320x240) at 15fps

Method used

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Examples

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Embodiment Construction

[0013] The following detailed description refers to the accompanying drawings. Wherever possible, the same reference numbers will be used in the drawings and the following description to refer to the same or like elements. While various embodiments of the invention may have been described, modifications, adaptations, and other implementations are possible. For example, substitutions, additions, or modifications may be made to elements shown in the figures, and the methods described herein may be modified by substituting, reordering, or adding stages to the disclosed methods. Accordingly, the following detailed description does not limit the invention. Instead, the true scope of the invention is defined by the appended claims.

[0014] Provides video conferencing rate matching. According to embodiments of the present invention, a multi-bit-rate (MBR) scheme may be used to stream data to a client consistent with the client's ability to receive and process data.

[0015] fig...

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Abstract

Video conference rate matching may be provided. A video conference server may receive video source streams from clients on a video conference. The server may analyze each client's capabilities and choose a video stream to send to each client based on those capabilities. For example, a client capable of encoding and decoding a high definition video stream may provide three source video streams - a high definition stream, a medium resolution stream, and a low resolution stream. The server may send only the low resolution stream to a client with a low amount of available bandwidth. The server may send the medium resolution stream to another client with sufficient bandwidth for the high definition stream, but which lacks the ability to decode the high definition stream.

Description

Background technique [0001] Rate matching in video conferencing is the process of improving video conferencing performance. In some scenarios, a video conferencing client connected via the Internet may have a fluctuating amount of bandwidth, while other clients located on the corporate intranet have a steady amount of bandwidth. The Internet client may not receive the same quality video stream as the intranet client, so the video conferencing system may be forced to reduce the video quality of all participants to a level that the lowest performance client can handle. That is, the system forces intranet clients to compromise and sacrifice their capabilities and only encode / receive on low bitrate streams with a low resolution and low frame rate experience. [0002] For example, encoding and playback can be performed at VGA resolution (640x480 pixels per frame) at a frame rate of 30 frames per second (fps) for intranet clients. Intranet clients may only be able to encode and re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/15H04N7/12
CPCH04N21/6377H04N21/25833H04N21/658H04N21/4788H04N21/44029H04L12/1827H04N7/15
Inventor M-C·李M·韩T·摩尔
Owner MICROSOFT TECH LICENSING LLC
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