Image-text Network Solution for Channel Packing
The networked application of title generator for broadcasting line in image-text equipment is at the leading position. When networking of the title generator is mentioned, many people will subconsciously think the application of broadcasting line. In fact, the network of the title generator for broadcasting line belongs to relatively fundamental network when compared with the technologies and current situation of the audio/video production network of the TV station.

Under the current architecture of the whole station network, in the whole process of program production and broadcasting, the workflow of videotape or other traditional medium is completed replaced by networked file transfer. However, the image-text information broadcasting network is almost still in semi-automatic state, which can not realize automatic import of program of the General Editor Office or that of master control broadcasting, automatic subtitle generation or automatic synchronization of broadcasting time sequence of subtitle list with the program.

In the channel information packing system of CoEdit System collaborative workflow engine, advanced file management philosophy is adopted, interconnection technologies with high safety are used, and a safe interaction channel is established between the channel information packing system and operation systems of the whole station network, which truly extend the workflow of the whole station network to the least significant end of release.

As shown in the architecture chart of the channel packing system, the channel packing system is divided into two subsystems isolated physically in network level: program production subsystem and broadcasting subsystem. The program production subsystem is interconnected with external systems such as all operational production networks and program production system of the General Editor Office by provision of API interface, so as to realize interaction of materials, information data and program. The broadcasting subsystem is interconnected with the master control broadcasting system by provision of API interface, so as to realize interaction of programs.

The program production subsystem has workstations or software for template design, subtitle production, data uploading, etc. as well as independent equipment related to network system. 

The broadcasting subsystem has broadcasting equipment such as broadcasting control workstation and broadcasting server or template design workstation and program production workstation for emergency or backup as well as independent equipment related to network system.

An effective protection mode is used to realize data synchronization and physical isolation of network between the broadcasting subsystem and the program production subsystem. 


Features of new generation channel packing system

The core design advantages of the channel information packing system based on CoEdit System collaborative workflow engine include:


Supporting program production at a time and synchronous broadcasting in high definition and standard definition modes

In the release area template management of CoEdit System, the function of coincident release of templates of different modes is supported, i.e., the high-definition or standard-definition template with the same file structure is arranged on the broadcasting servers with different modes such as high definition and standard definition modes. The program production software only needs to conduct program production based on the template of any mode, to realize synchronous rendering broadcasting on high-definition and standard-definition servers.

On the basis of absolutely safe data interaction between the broadcasting subsystem and program production subsystem, complete synchronization of two subsystem servers is realized by effective safety isolation technology. 

One of core designs of the new generation channel packing system is to conduct physical isolation for broadcasting subsystem and program production subsystem in the network level. The major function of the broadcasting subsystem is safe broadcasting, and safety is a vital factor. The tasks of the program production subsystem include template design and preparation of broadcasting list, the subsystem’s diversified data sources and external interactivity are very important functional requirements, and its safety level is far below that of the broadcasting subsystem. Physical isolation for the two requirements with subsystems with different orientation ensures absolute safety of broadcasting and meets the requirement of program production subsystem for external interconnection, which makes the channel information packing system cease to be the information isolated island in the whole station network.


The program production subsystem provides a WebServices interface

The program production subsystem receives the program from the program production system of the Chief Editor Office by API, and can automatically convert the program into subtitle list, so as to realize automatic import of program. In case of variation in the program of the Chief Editor Office, automatic adjustment on corresponding subtitle time and length can be realized by the re-imported program.


The broadcasting subsystem provides a WebServices interface

The broadcasting subsystem receives the program from the master control broadcasting system by API, and can make automatic adjustment on corresponding subtitle time and length based on the change in program time and length. Meanwhile, for manual emergency processing such as “Take” and “Skip” of the master control broadcasting system, the channel information packing system can be informed in the way of API invocation, so as to realize emergency linkage of subtitle list with the program.

When importing the program, the definition of template switching is used to realize automatic transfer from the formatting program name in the program to subtitle as well as automatic generation of subtitle such as corner information of TV play and countdown for advertisement, which greatly reduce the workload of program production.


Conclusion

The early channel title generator is only used to broadcast some simple subtitle, with single function and relatively monotonic broadcasting form. Nowadays, the urgent demand of most TV viewers for aesthetic measure of channel information and diversified broadcasting content places a test on the broadcasting equipment with the current title generator architecture. Increasingly more application of online packing products on the broadcasting line actively promotes the adjustment of the current information broadcasting mechanism, and lays a solid foundation for future packing style diversification and real-time transformation of packing information of the channel.


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