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Media stream transmitting and distributing method and system

A media streaming and media technology, which is applied in closed-circuit television systems, selective content distribution, electrical components, etc., can solve the problem of packet loss clients sending retransmission packets, etc., to reduce network burden, improve efficiency, and reduce transmission distance. Effect

Active Publication Date: 2014-06-04
SUZHOU KEDA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that the video surveillance system for one-to-many clients in the prior art cannot effectively only send retransmission packets for the packet loss client during the packet loss retransmission process. A method and system for media streaming distribution for sending retransmission packets by packet client

Method used

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  • Media stream transmitting and distributing method and system
  • Media stream transmitting and distributing method and system
  • Media stream transmitting and distributing method and system

Examples

Experimental program
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Embodiment 1

[0051] This embodiment provides a method for media streaming and distribution, the following in conjunction with the attached figure 1 Describe in detail, including the following steps:

[0052]S1: The monitoring front end packs the media stream data into data packets and sends them to the client through the server, and the server receives the retransmission request sent by the client after the data packet is lost;

[0053] S2: The server and each client that sends a retransmission request create a retransmission request record, and the retransmission request records the reference count of the client's retransmission request for the same retransmission packet; the server receives When a retransmission request for the same retransmission packet comes from the same client, the reference count in the retransmission request record is increased by one;

[0054] S3: The server sends a retransmission packet to the corresponding client according to the retransmission request record. ...

Embodiment 2

[0080] This embodiment provides a system for streaming and distributing media, such as figure 2 shown, including:

[0081] The transmission module is built in the server, and is used to send the data packet packaged by the monitoring front end to the client, and receive the retransmission request sent by the client after the data packet is lost;

[0082] A retransmission request record creation module, configured to create a retransmission request record between the server and each client that sends a retransmission request, the retransmission request records the client's retransmission request for the same retransmission packet Reference count; when the server receives a retransmission request from the same client for the same retransmission packet, the reference count in the retransmission request record is increased by one;

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Abstract

The invention provides a media stream transmitting and distributing method and system. The media stream transmitting and distributing method and system are not limited to point-to-point communications and are suitable for a video monitoring system for a one-to-many client, and due to the fact that an RTP is used for transmitting media stream data, the requirements for real-time performance and high reliability of media stream data transmission are met. A circular buffer area is built and used for storing all RTP data packets, when packet losses occur in the client, lost packets which the client needs are sought for in the circular buffer area preferentially and directly sent to the corresponding client, and therefore the retransmission efficiency of the lost packets is improved. When the lost packets cannot be sought in the circular buffer area, retransmission request records are established according to different clients, corresponding calculation is performed, it is guaranteed that retransmission packets are only transmitted to the clients who lose the packets, and the network load is relieved to some extent. Only a server needs to be modified, and the retransmission and recombination strategy of a front monitoring end and the clients is completely invariable. Meanwhile, three transmitting modes are provided for users, the users can set the modes by themselves, and the media stream transmitting and distributing method and system have high flexibility.

Description

technical field [0001] The invention belongs to the field of video monitoring, and in particular relates to a method and system for media streaming and distribution. Background technique [0002] The most basic business function of the video surveillance system is the forwarding and distribution of media streams. That is, when multiple clients need to browse the same monitoring front-end at the same time in real time, the monitoring front-end will copy and distribute them to multiple clients in the form of media packets. At present, the media streaming and distribution modes in the video surveillance system mainly include front-end direct transmission mode, front-end multicast mode and server mode. Regardless of the mode, there will be a problem of network instability leading to packet loss in the process of sending media packets, requiring the client to request retransmission, and the video surveillance system processes the retransmission request and resends the media packe...

Claims

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Application Information

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IPC IPC(8): H04N7/18H04N21/637H04N21/6437
Inventor 梁黎陈卫东
Owner SUZHOU KEDA TECH
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