Method for realizing self adaptation to dynamic code stream bandwidth in video scheduling system

Abstract

The invention discloses a method for realizing self adaptation to dynamic code stream bandwidth in a video scheduling system. The method comprises the following steps of: transmitting media data; in the transmission process of the media data, obtaining media data transmission parameters; according to equipment parameter information for transmitting the media data and combining the media data transmission parameters, carrying out adjustment on the media data code stream; and outputting the adjusted media data code stream. According to the method, a scalability design and dynamic coding are carried out on the media data in the video scheduling system by acquiring the parameters in the process of media data transmission, and then the video scheduling system is better matched with dynamic change of a network, so that the application service quality of the video scheduling system is improved.

Description

technical field [0001] The invention relates to a method for realizing dynamic code stream bandwidth self-adaptation, in particular to a method for realizing dynamic code stream bandwidth adaptive transmission of multimedia data in a video scheduling system, and belongs to the technical field of network transmission. Background technique [0002] The Internet is often used to transmit multimedia data streams. In the Internet, due to the "best effort" feature of the TCP / IP network, the transmission rate of multimedia data streams will be very slow due to problems such as large data volume and unstable network service quality (packet loss, delay, jitter), or even There was a problem with the transmission failure. [0003] At present, there are mainly the following typical QoS (Quality of Service) policies: [0004] 1. Integrated service model (Intserv for short) [0005] Intserv mainly introduces RSVP (Resource Reservation Protocol, that is, signaling protocol), and the app...

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Problems solved by technology

Not all routes must support the RSVP protocol. If there is any link in the network link that does not support the protocol, it will not be able to provide effective QoS services; second, the burden of routing will increase with the increase of business. Large, poor network scalability

Because IntServ requires end-to-end signaling, each router must check each incoming packet and ensure the corresponding service, so each router must maintain the state information of each flow, thus increasing the complexity of integrated services , resulting in poor scalability

Third, if there are nodes / networks that do not support IntServ, although signaling can pass through transparently, it is impossible for applications to realize resource reservation in the true sense, and the desired QoS guarantee will be greatly reduced

The congestion caused by the generation of loop data packets may cause the delay or discard of non-loop data packets, and in severe cases, the network will be paralyzed

[0010] However, the current QoS policies basically work at the network layer, just to solve the problem of network congestion during the transmission process, but not from the source, resulting in the discarding / retransmission of part of the data packets during the transmission process.

For multimedia services with a huge amount of data (such as video conferencing, streaming media, etc.), it is difficult to meet the actual needs of the video scheduling system only by relying on QoS policies

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