Recent years, the number of radio and television industry, the process of accelerating, radio and television technology from analog to digital conversion has become the focus of work at all levels of broadcasting organizations, this also contributed to radio and television media from traditional media to the modern transformation process. Especially with the approaching 2008 Beijing Olympic Games, the digital television in particular, high-definition television by more and more attention.|
High definition television with high definition, large screen size, increase type than the width, color, presence, and many other powerful features, but its image quality may be comparable to 35mm film to theaters, so high-definition television is often as the most advanced digital TV business forms. China Central Television in 2005 to carry out high-definition television program production and broadcast for a number of discussions, recognizing the development of high-definition TV is not only related to the development of China's broadcasting industry, but also related to maintaining a competitive edge and meet the media to promote national advances in information technology needs. After many efforts and preparations, CCTV HD Channel on January 1, 2006 was formally launched.
HD channels in order to protect at least 1.5 hours per day self-definition broadcast programming must be a certain size of production and broadcasting system, the system must take into account from the beginning of the optimize program flow and efficient production system established, it is necessary to achieve high-definition TV and SDTV production of means of two closely integrated with the production and broadcasting systems; and long terms, high definition and standard definition production process compatible high-definition television, not only in the initial stage the current critical model for the future development of television programming is also of great significance.
Channel construction in the early, built a high-definition CCTV network as high-definition production of non-linear editing system. HD production system to achieve subtitles and no subtitles broadcast version of the production of material, by equipment inside the station broadcast system into SATA cache broadcast system, the broadcast end of the separation of video and broadcast captioning, broadcast into the Museum of the non- version of the broadcast with subtitles and finished save the subtitle file to bind to broadcast with subtitles-free preservation and use of existing video resources can get the maximum protection for the future use of video material to facilitate the re- . To complete the production and broadcast high-definition titles tasks, broadcast subtitling systems to be built, the system's overall objectives are: the use of advanced computer and network communication technologies, the establishment of China Central Television broadcast HD programming subtitling support system, to realize HD Non-Linear Editing Network produced programming subtitles superimposed, a feature complete subtitling software, set up convenient subtitles superimposed manner, and high SD compatible overall title Resource Management; to achieve high-definition programming and SD version of the production, the establishment of low stream trial film distribution system; to achieve high-definition programming multi-language subtitle version of the save, save separate video titles, broadcast superimposed line functions. Subtitling and broadcast system of basic tasks include:
Compiled by the non-network HD output HD cleanfeed program, under the transformation into a 16:9 standard definition video input to SD NLE workstations, production and superimposed subtitles and output standard definition tape broadcast version.
Will be superimposed subtitles into the low post-program stream files, transfer to the trial server chip for chip in the terminal to download the trial after the trial film content.
Network through high-definition and high definition into a CG film with the output to HD broadcast version of the technical review films.
Subtitle project file through the network to network HD NLE systems, and programs without subtitles bound together into a film file storage, transmission and broadcast.
The subtitle system design with existing programs of CCTV production management system, SATA system effectively articulated.
Simple flow diagram System requirements in clear, after their evaluation of various companies, CCTV systems use the ocean and the ocean HD nonlinear editing unit into high-definition network subtitles subtitling and broadcast systems. Ocean Co., Ltd. According to the actual characteristics of the system into production system and broadcast domain domain system in two parts. Production domain system is mainly the production of complete high-definition titles, broadcast domain system will make the field finished the subtitle file transfer to the broadcast system, in line with the high-definition broadcast video file binding, interaction with the broadcast code. Domain system and broadcast production system flow field inside the station, program relies on the production management system and SATA prepare information and data broadcasting system for the effective transfer and exchange. In design, the oceanic system on high-definition titles borne by business objectives specific system design, the following principles in the design:
Applicability of principles: business processes meet the user's actual requirements;
Ease of use principles: business process is simple, as far as possible automatic task processing, which will decrease the workload;
Security principles: give full consideration to the safety subtitles at all nodes to ensure that does not affect the overall system security;
Extension principle: The system has good expansion capacity, give full consideration to high-definition NLE HD technology development and business operation of China Central Television, has good support for capacity expansion;
The entire system will be fully integrated in business processes and preparation of CCTV has been put into operation a system, for overall design, and take advantage of Taiwan have been building systems equipment. In the design ideas, the realization of subtitles production and broadcast of high SD compatible, that is, SD on subtitles in the production, while generating high-standard definition for broadcast-compatible subtitle finished file, and the realization of a web-based subtitling workstations, network subtitles broadcast stations to share network resources using network broadcast with subtitles machine series, superimposed to achieve a variety of application mode. Chip in the trial program, the establishment of the trial process of film mechanism is simple and practical way to achieve program review of the network in high definition in the remote non-compilation film trial mode, on the trial network of the future high-definition film of non-compiled for reference.
Used in broadcast video broadcast subtitle synchronization solution for separation, the air separation line of broadcast and video captions superimposed. As the program is broadcast all the way on paper, so the design of the entire system fully integrates the cache SATA within the system, program production management system and library system to complete all the tasks of broadcast digital data management and data migration management. Separation and because the video title production, transfer, broadcast, so the design must be in strict accordance with the program uniform naming and accurate records of when the code was designed
I am China Manufacturers writer, reports some information about air traffic control centers , 62mm circular polarizing filter.
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