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An adaptive streaming aware network node, client and method with priority marking

一种自适应流、认知网络的技术，应用在高级技术、气候可持续性、可持续通讯技术等方向，能够解决不能质量等级控制、用户不适、缓冲器欠载等问题

Inactive Publication Date: 2015-01-28
ALCATEL LUCENT SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Video servers and intermediate units do not have any control over the quality level selected by the client
Buffer starvation or buffer underruns can occur on the client side due to, for example, network congestion or sub-optimal decisions by quality-level decision algorithms, resulting in interruption of video playback or discomfort for users watching the video stream

Method used

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  • An adaptive streaming aware network node, client and method with priority marking

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0043] figure 1 Functional blocks of a system implementing the invention are shown. figure 1 The HTTP adaptive streaming (HAS) client 103, the HAS server 102, and the HAS cognitive node 101 between them are shown in more detail.

[0044] HAS cognitive node 101 includes monitoring function 111 , priority configuration logic 112 , packet marker 113 and scheduler 114 . Furthermore, depending on the type of intermediate node represented by node 101, it may include routing or switching functionality, caching functionality, packet processing functionality, and the like. figure 1 Also shown is input port 115 for receiving video segments from HAS server 102, output port 116 for sending requests to HAS server 102, output port 117 for sending video segments to HAS client 103, and output port 117 for sending requests from The HAS client 103 receives the input port 118 of the request.

[0045] In HTTP Adaptive Streaming (HAS), video is encoded at multiple bit rates and formed into segm...

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PUM

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Abstract

In adaptive streaming, video segments are available in one or more quality levels, and each video segment is delivered to the client (103) in a quality level specified in a request received from that client (103). In order to reduce the risk for buffer underrun, an adaptive streaming aware network node (101) comprises: - session monitoring means (111) for collecting buffer fill information indicative for a buffer volume at the client (101) occupied by a video session; - priority calculation means (112) for determining a priority level for video segments of the session in function of the buffer fill information; and - video segment marking means (113) for marking video segments of the session with the priority level.

Description

technical field [0001] The present invention relates generally to adaptive streaming of video segments, ie fixed or variable sized segments of a video stream that can be delivered with different quality levels, said segments typically being several seconds in length. These video segments are also called chunks or segments. The invention specifically aims at reducing the risk of buffer underruns for video delivery using adaptive streaming. Background technique [0002] Video is increasingly delivered using Adaptive Streaming (AS) technologies such as HTTP over Adaptive Streaming (HAS). With adaptive streaming, video items such as files or streams are encoded and made available at different quality levels. The video client predicts the highest sustainable quality level based on its own measurements and requests the video item at this highest sustainable quality level. For example in the case of HTTP adaptive streaming, each segment is made available by the HTTP server with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L29/06H04N21/24
CPCH04N21/64738H04N21/234327H04L67/322H04N21/2401H04L65/605H04N21/64769H04L65/80H04L67/02H04L65/4069H04L65/61H04L65/765H04L67/61H04L65/752H04N21/24Y02D30/70H04L65/762
Inventor B·德弗莱斯朔韦尔R·胡瑟格姆斯K·德舍佩尔
Owner ALCATEL LUCENT SAS
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