A cache method for scalable video stream

A video streaming and caching technology, which is applied in the field of scalable video streaming caching, can solve the problems of large content delay, redundant cached content, and inability to fully utilize the cached content in the early stage, so as to improve efficiency, improve cache hit rate, The effect of reducing the average number of hops

Active Publication Date: 2021-02-12
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a scalable video stream caching method, and solve the problems of redundant caching content in the prior art, inability to fully utilize the cached content in the early stage, and excessive time delay for users to obtain content and other technical issues

Method used

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  • A cache method for scalable video stream
  • A cache method for scalable video stream
  • A cache method for scalable video stream

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Embodiment Construction

[0040] The caching method of the scalable video stream provided by the present invention focuses on solving the caching problem of the network video stream, and mainly includes the following steps:

[0041] Video stream layering for scalable video streams;

[0042] Calculate the request ratio Req for each title i ;

[0043] Calculate real-time occupancy Rcs of video titles cached in CS i ;

[0044] Compare Req i and Rcs i According to the size of the two, it is determined whether the network node caches the video segment.

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0046] Suppose there are 25 different videos, and each video title is different, and each video file is composed of 800 video clips, so there ...

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Abstract

The invention discloses a scalable video stream buffering method which comprises the following steps of: layering the video stream; dividing the scalable video stream into a plurality of resolution, quality and frame rate layers; buffering space allocation: combining the popularity of video titles and video clips to allocate buffer space proportionally. The invention can greatly reduce the redundancy of the cached content in the network, improve the cache hit rate, reduce the average hop number required for obtaining the content, shorten the time required for completing the video cache, and improve the efficiency.

Description

technical field [0001] The invention relates to a caching method for scalable video streams, belonging to the technical field of network caching. Background technique [0002] SVC, Scalable Video Coding, scalable video codec, is a technology that can divide a video stream into multiple layers of resolution, quality and frame rate. SVC is to specify how the device encodes and decodes the multi-layer video stream. An extension of the H.264 video codec standard, known as H.264 / SVC. H.264 / SVC is an extensible part of H.264 / AVC, the output of which is added to the standard related to video data extensibility of the H.264 standard. When encoding and decoding video using SVC, the output of video encoding can be divided into different layers. Encoded files not only contain base layers with important information, but also enhancement layers with information for quality improvement. The data of the basic layer can enable the decoder to decode the basic video content normally, but t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/231H04N21/2343H04N21/845H04N19/30
CPCH04N21/23106H04N21/23113H04N21/234327H04N21/8456H04N19/30
Inventor 潘沛生杨佳鑫
Owner NANJING UNIV OF POSTS & TELECOMM
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