Method for transmtitig digital video

Abstract

Using packet switching, the disclosed digital video transmission method can be applicable to united public network in next generation. New layer of data link layer protocol - data link procedure (DLP) is introduced between digital video service layer and each physical layer. Using DLP protocol defined destination address code and source address code compatible to current telephone number system as addresses of sending end and receiving end of digital video signal realizes forwarding and exchanging digital video signal in two layers, as well as realizes purpose compatible between packet voice network and IP network. Using safety mechanism, network control management mechanism, flow management mechanism provided by DLP realizes network management control function such as two layer protected rearrangement in two layers, performance management, fault management etc. The method makes current communication network transits to united public network in next generation smoothly.

Description

technical field [0001] The present invention relates to communication technology, specifically a digital video transmission method using packet switching, more specifically a digital video transmission method that is compatible with the Internet and can be used in the next generation unified telecommunication-class public network using packet switching technology Method, a method that can be broadcast or unicast, interactive packet digital video transmission, the idea proposed by the present invention is mainly used for various equipment related to digital video (comprising various digital video transmission equipment , digital video transmission equipment, digital video switching equipment, digital video receiving equipment), set-top boxes, various switching routers (core or high-end switching routers, aggregation switching routers, edge switching routers, access switching routers), packet-based (packet) switching High / medium / low-end Ethernet switches, multi-service transport...

AI Technical Summary

Problems solved by technology

[0006](1) The above-mentioned digital video transmission method is similar to the traditional analog TV transmission technology, and it is still a one-way, broadcast-type transmission technology. This method cannot Determine the receiving status of the receiver, so if a node in the network fails, the source of the transmission is unaware. In the wired network, if the user does not report the failure to the service provider through other means such as calling the service provider, the failure will not last for a long time. be resolved, thereby affecting the quality of service of the network for a long time, which is unsatisfactory for pay TV users

[0007](2) The above-mentioned digital video transmission technology is suitable for transmitting free TV, which is not conducive to network service providers providing differentiated services according to user requirements, such as providing video on demand, Specific paid programs cannot realize multi-service transmission

[0008](3) The above-mentioned digital video transmission technology does not provide a security mechanism. If encryption and authentication are performed for special video requirements, this requirement cannot be met

[0009](4) It is not compatible with voice and Internet networks. In recent years, with the rapid development of Internet technology, the telecommunications and communication networks are undergoing profound historical changes, making telecommunications The network has evolved from a circuit-switched network to a packet-switched network, and the entire communication network is evolving to the next-generation unified public network. The next-generation public network can realize the integration of three networks, that is, voice, data and video can be transmitted on one network. Business, voice and Internet data are bidirectional, and the above-mentioned digital video transmission technology cannot meet this requirement

[0010] As for the transmission of digital video on the telecommunication network, the current practice is to use ATM (ATM is the English abbreviation for Asynchronous Transfer Mode) technology as the adaptation layer, first of all, the digital video The bit stream is encapsulated into the ATM adaptation layer, then encapsulated into the ATM layer, and then encapsulated into the payload domain of the telecommunication transport network such as SDH. It has many shortcomings. It is impossible to use ATM to realize the integration of voice, data and video networks. ATM technology itself tends to be eliminated in the telecommunications network, but some of the essence of ATM technology will exist in the network in some form.

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