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QoE monitoring and optimization method for adaptive code rate video direct broadcast

An adaptive bit rate and live video technology, applied in the field of digital video, can solve problems such as live broadcast stuttering, so as to avoid delay stuttering and improve the quality of experience

Active Publication Date: 2016-02-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0023] The purpose of the present invention is to propose a QoE monitoring and optimization method for adaptive code rate video live broadcasting in order to solve the problem of live broadcast freezes caused by drastic changes in the loading rate of the player in the existing live broadcast system based on HAS technology

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  • QoE monitoring and optimization method for adaptive code rate video direct broadcast
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  • QoE monitoring and optimization method for adaptive code rate video direct broadcast

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Embodiment Construction

[0043] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0044] Such as image 3 As shown, it is a schematic diagram of the relationship between the QMOM module proposed by the present invention and the existing HAS live broadcast system based on the HLS protocol. It regularly obtains the information of the code rate change status from the client. This embodiment is implemented by the HTTPGET request sent by the client, namely Read the code rate information (ListenHTTPGETandMonitorQoEofHLS) by listening to the HTTPGET sent, and adjust the slice duration according to the change of the code rate. This embodiment is implemented by sending a message to the slicing tool, so as to solve the mobile client due to frequent code rate switching The resulting delay and freeze improves the user's viewing experience.

[0045] Such as Figure 4 Shown is the schematic diagram of the work flow after the existing HAS live ...

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Abstract

The invention relates to a quality of experience (QoE) monitoring and optimization method for adaptive code rate video direct broadcast, and belongs to the technical field of digital videos. The method comprises the steps that: based on an HAS direct broadcast system, a server continuously monitors a code rate change situation of a client; when the code rate of the client is changed, the delta T time length of a slice is reduced, otherwise, the delta T time length is increased, and a slicing tool is notified to perform slicing according to the increased or reduced time length of the slice; and no matter whether the time length is reduced or increased, the final time length of the slice should be within a range of [Min, Max], wherein Min represents preset shortest time, and Max represents preset longest time. Compared with the prior art, an encoder and the slicing tool can cut a direct broadcast stream into variable time length segments (VTS), and the length of the slice can be changed as feedback of a fluctuated loading rate, so that delay jamming caused by frequent code rate switching is effectively avoided and the QoE of users on video business is improved.

Description

technical field [0001] The invention belongs to the technical field of digital video, and relates to a video QoE monitoring and optimization method, in particular to a QoE monitoring and optimization method of self-adaptive code rate video live broadcast in a mobile network environment. Background technique [0002] With smartphones and tablets becoming the workhorse of mobile devices, mobile video services have become part of people's daily lives. Mobile video traffic will grow 75% between 2012 and 2017, the highest rate of any mobile application business. [0003] Quality of Experience, referred to as QoE, refers to the user's subjective perception of the quality and performance of equipment, networks and systems, applications or services. [0004] HTTPAdaptiveStreaming is referred to as HAS, that is, HTTP adaptive stream transmission technology. This transmission method is an adaptive transmission method of streaming media based on HTTP. Its transmission action is simi...

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Application Information

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IPC IPC(8): H04N21/6373H04N21/647H04N21/845
CPCH04N21/6373H04N21/64769H04N21/8456
Inventor 费泽松王飞孙尧吴志坤匡镜明
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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