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SDN switch based video precise switching method

A switch and video technology, applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problems of bandwidth loss, unfavorable cascading of multi-layer switches, etc.

Active Publication Date: 2017-09-05
COMMUNICATION UNIVERSITY OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Source-based video switching technology can achieve net switching, and at the same time, it is better in terms of bandwidth utilization, but it is not conducive to the cascading of multi-layer switches, and there is also a greater risk in terms of time reference
Purpose-based video switching technology can easily complete multi-level expansion, and net switching is also relatively easy to achieve, but to achieve net switching, the bandwidth will be lost by half

Method used

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  • SDN switch based video precise switching method
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  • SDN switch based video precise switching method

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Embodiment Construction

[0020] The embodiment of the present invention provides a method for net video switching based on an SDN switch, which controls the switching of video streams by sending a flow table through the SDN, and at the same time buffers the video streams in the switch and completes precise switching. details as follows:

[0021] (1) Basic process of video switching

[0022] (1) Source A and Source B are the video sending ends, Destination is the destination end, the switch has port 1, port 2 and port 3, and the video streams of Source A and Source B reach port 1 and port 2 of the switch respectively. The switch analyzes the received video stream and extracts the tuple information (including source IP, destination IP, source port number, destination port number, etc.). The SDN controller adds flow entries through the Flow Mod message, sends the flow table to the switch, and the switch matches the extracted tuple information with the flow table through the table lookup algorithm, and d...

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Abstract

The invention discloses an SDN (Software Defined Network) based video precise switching method. The SDN based video precise switching method comprises the steps of controlling video stream switching through a flow table sent by the SDN; and caching video streams and finishing precise switching by the switch. By adoption of the technical scheme, precise video switching (precise switching) of the video stream based on the switch is realized based on the SDN in an IP processing process of the media video production.

Description

technical field [0001] The invention belongs to the technical field of video production, and in particular relates to a software-defined network (SDN)-based switch-based precise video switching (clean switching) method in the process of media video production. Background technique [0002] Since the broadcasting industry has entered the digital age from the analog era, IP-related technologies have penetrated into the broadcasting industry step by step. Production has changed from linear to nonlinear, media assets have changed from tape libraries to disk arrays, and broadcasting has changed from video recorders to servers. In terms of hardware equipment alone, the equipment room of radio and television is quite close to that of IT enterprises. The biggest difference between the two lies in the transmission method. The most common method in the broadcasting industry is to use the SDI standard to transmit signals through coaxial cables. This looks very different from twisted-...

Claims

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Application Information

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IPC IPC(8): H04L12/861H04L12/933H04L12/935H04L29/06H04L49/111
CPCH04L49/10H04L49/30H04L49/90H04L65/60
Inventor 颜金尧耿俊杰蔡洋
Owner COMMUNICATION UNIVERSITY OF CHINA
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