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Video code rate selecting method driven by user experience under HSPA system

A user and bit rate technology, applied in the field of video bit rate selection, can solve the problems of sacrificing video quality and not effectively improving the end user experience level

Inactive Publication Date: 2013-10-02
XI AN JIAOTONG UNIV
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, due to the different playback conditions of each user, starting from the network status alone, while ensuring the video delay, the video quality of some users is sacrificed, which cannot effectively improve the end user experience level

Method used

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  • Video code rate selecting method driven by user experience under HSPA system
  • Video code rate selecting method driven by user experience under HSPA system
  • Video code rate selecting method driven by user experience under HSPA system

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Embodiment Construction

[0049] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0050] The code rate selection method driven by the user experience under the HSPA system provided by the present invention includes the following operations:

[0051] 1) Initialize the parameters of video transmission in the HSPA system, and determine the bit rate information of all encoded video sequences;

[0052] 2) When initially requesting a segment, request the segment with the lowest code rate from the HTTP server;

[0053] 3) If the segment is not the initial request, find the user who requests the video segment at the current moment, and calculate the corresponding HSPA network rate B in the previous segment transmission time interval of the user n ;

[0054] 4) According to the corresponding HSPA network rate B in the previous segment transmission time interval of the user n and...

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Abstract

The invention discloses a video code rate selecting method driven by user experience under an HSPA (High Speed Packet Access) system. The method comprises the following steps: firstly, extracting bottom layer network velocity in the previous segment transmission time interval, and estimating the network velocity when the next segment transmits according to the velocity; then extracting the number of the video frames not played in the current play buffer memory by the current user; finally determining the code rate version of the next requested video according to the network state and the number of the video frames in the buffer zone. Aiming at the video transmission problem in the HSPA system, the method comprehensively considers the factors such as the network state of each user and the play condition of the terminal user, provides a code rate self-adaptive video segment requesting method, and can effectively improve the experience level of the terminal user.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a video code rate selection method driven by user experience under the HSPA system. Background technique [0002] With the continuous development of mobile communication network technology, the proportion of video services in mobile communication services is getting higher and higher. The high data volume of video services makes video transmission relatively dependent on network speed. However, due to the time-varying characteristics of wireless networks, the service quality of video services cannot be effectively guaranteed. In many existing research works, the original video sequence is encoded into multiple compressed versions with different qualities through a video encoder, and the compressed version suitable for the current network transmission is adaptively selected for request through real-time monitoring of the network status, thereby ensuring high video service qual...

Claims

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Application Information

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IPC IPC(8): H04N21/2662
Inventor 贺丽君刘贵忠陈歆陈雨辰董溢华
Owner XI AN JIAOTONG UNIV
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