Bit rate adaptive adjustment device and method giving throughput and video buffer into consideration

Abstract

The invention discloses a bit rate adaptive adjustment device and method giving throughput and video buffer into consideration. According to the device, when a bit rate adaptive module outputs transmission bit rate information of a to-be-requested media segment, throughput and video buffer information in other modules are given into consideration. History throughput is smoothed through utilizationof a Holt-Winters method, and the throughput of the to-be-requested media segment is estimated. A buffer weight parameter is calculated according to current video buffer length in a buffer managementmodule, and weighting adjustment is carried out on the estimated throughput, thereby obtaining the optimum transmission bit rate. The bit rate adaptive module selects a transmission bit rate of the to-be-requested media segment from a selectable bit rate list according to the optimum transmission bit rate. According to the device and the method, defects in the prior art are solved, and the relatively excellent playing experience is kept in various aspects. According to the device, the structure is simple, the conception is clever, operation steps are simple, convenient and fast and the operation is easy to realize. The device has good popularization and application prospect.

Description

technical field [0001] The present invention relates to a new technology in HTTP adaptive transmission, to be precise, relates to a code rate adaptive adjustment device and method that takes into account both throughput and video buffering, and belongs to the code rate adaptive adjustment in streaming media adaptive transmission Technical field of devices and adjustment methods thereof. Background technique [0002] Streaming media is a media format (such as audio, video or multimedia files) that uses streaming technology to play continuously and in real time on the network. The biggest difference between streaming technology and traditional transmission technology is that it does not require complete Download the entire media file, but only need to download the initial part of the content to analyze and output; at the same time, buffer the data packets in the computer so that the media data can be output correctly and smoothly. For users, they only need to wait for a delay...

AI Technical Summary

Problems solved by technology

In addition, some algorithms adopt more aggressive processing methods, allowing higher-level video segments to be downloaded beyond the current throughput limit, which can easily cause buffer underflow and video freezes

[0017] In short, the existing above-mentioned two types of algorithms still have room for improvement. How to improve them so that users can achieve a better playback experience has become the focus of attention of technical personnel in the industry.

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