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Video monitor system and method for forward correcting thereof

A video monitoring system and forward error correction technology, which is applied in closed-circuit television systems, televisions, pulse-modulated television signal transmission, etc., can solve problems such as network packet loss and limited upstream bandwidth, and achieve the effect of reducing the cost of use

Active Publication Date: 2010-07-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a video monitoring system and its forward error correction method, which solves the problem of network packet loss that often occurs between the monitoring front end and the monitoring platform due to limited upstream bandwidth

Method used

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  • Video monitor system and method for forward correcting thereof
  • Video monitor system and method for forward correcting thereof
  • Video monitor system and method for forward correcting thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] like figure 1 As shown, the method for forward error correction in the video surveillance system of the present invention comprises the following steps:

[0037] Step 110, monitoring front-end initiates session request to monitoring platform (can be SS, Stream Server, streaming media server), establishes corresponding session; And in SDP (Session Description Protocol, session description protocol) message, carry the relevant field that supports FEC;

[0038] The present invention extends the SDP message to support FEC, specifically defined as follows:

[0039] m =

[0040] in, The definition is the same as the RFC2327 protocol, and the definition of FEC is added in , and the key fields are defined as follows:

[0041] Payload type, source stream identifier, FEC encoding identifier, FEC encoding redundancy, number of FEC encoded source packets, FEC repair window size, etc.

[0042] For example:

[0043] The payload type of FEC is defined a...

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Abstract

The invention discloses a video monitor system and a method for forward correcting thereof. The method comprises the followings steps of: sending a conversation request to a monitoring platform by a monitoring front end, establishing a corresponding conversation, performing FEC correcting coding on a media code stream by the monitoring front end, sending the coded FEC correcting code stream and a source media code stream in a same passage to the monitoring platform, dividing the received code stream into the source media code stream and the FEC correcting code stream by the monitoring platform, and if a media packet is lost, recovering the lost media packet in the source media code stream by the FEC correcting code stream. The method of the invention solves the problem that the network packet is always lost due to the limited uplink bandwidth between the monitoring front end and the monitoring platform and lowers the use cost.

Description

technical field [0001] The invention relates to the field of video monitoring, in particular to a video monitoring system and a forward error correction method thereof. Background technique [0002] IP network-based video surveillance service is a new multimedia value-added service. The business system is mainly composed of three parts: monitoring front-end, monitoring platform and monitoring client. The monitoring front-end mainly completes the collection, encoding and uploading of video and audio signals; completes the collection and processing of alarm signals and completes the control of auxiliary equipment such as cameras and PTZs. The monitoring platform mainly completes media distribution, equipment management, business management and operation support. The monitoring client mainly presents specific video monitoring services for customers. Due to the limited uplink bandwidth between the monitoring front-end and the monitoring platform, network packet loss often occ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/66H04N7/18H04N21/438
CPCH04N7/66H04N21/4382
Inventor 靳自鸣陕毅段新平
Owner ZTE CORP
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