Video quality control method and device

A technology of video quality and control method, which is applied in the field of streaming media and can solve problems such as untimely adjustment and video quality fluctuations

Inactive Publication Date: 2018-07-03
PEKING UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above existing problems, the present invention provides a video quality control method and device to overcome the defects in the prior art that only adjusting the video quality level based on the current buffering time may lead to untimely adjustment or fluctuations in video quality

Method used

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  • Video quality control method and device
  • Video quality control method and device

Examples

Experimental program
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Embodiment Construction

[0021] figure 1 It is a flowchart of Embodiment 1 of the video quality control method of the present invention, as figure 1 As shown, the method includes:

[0022] Step 101. Obtain the buffer duration of video stream fragments detected at least two detection moments in the client buffer;

[0023] Step 102: Determine the current network bandwidth control amount of the client according to the at least two buffer durations and the preset buffer duration target value;

[0024] Step 103. Determine the quality level of the video code stream fragments to be transmitted in the server according to the network bandwidth control amount;

[0025] Step 104: Send a quality level adjustment request to the server, the adjustment request includes the quality level, so that the server transmits the to-be-transmitted Fragmentation of video code stream.

[0026] In the DASH streaming system, the client will buffer a part of the video stream fragments. The buffered video duration can reflect ...

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Abstract

The present invention provides a video quality control method and device. The method includes: acquiring buffer durations of video code stream fragments detected at least two detection moments in the client buffer; The value determines the current network bandwidth control amount of the client; determines the quality level of the video code stream segment to be transmitted in the server according to the network bandwidth control amount; sends an adjustment request carrying the quality level to the server, so that the server can use the The transmission code rate corresponding to the quality level is used to transmit the fragments of the video code stream to be transmitted. According to the multiple buffering durations obtained by the detection, the network bandwidth change of the client is estimated, and the quality level of the subsequent video stream fragmentation is determined based on this, so that the determined quality level can effectively avoid the time-varying influence of bandwidth changes, and does not It will lead to frequent adjustment of the quality level, which is conducive to ensuring the quality of video transmission.

Description

technical field [0001] The invention belongs to the technical field of streaming media, and in particular relates to a video quality control method and device. Background technique [0002] With the continuous development of mobile multimedia technology and the continuous improvement of network bandwidth, the demand for online on-demand and live broadcast services continues to grow, and video streaming services have become an indispensable application service in people's lives. However, due to the diversity of actual terminals and the heterogeneity of the network, the bandwidth conditions of different users are different and constantly changing. How to enable everyone to obtain a smooth and clear video viewing experience has become a major challenge. Considering that a video stream with a single bit rate cannot meet the above requirements, the server generally provides multiple video files of different quality levels with different transmission bit rates, and adaptively sele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/442H04N21/647H04N21/238H04N21/845
Inventor 孟胜彬孙俊段一舟郭宗明
Owner PEKING UNIV
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