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Part I: analysis of network digital radio and television technology

With the advent of the network era, the current new media technology has gradually attracted the attention of the state, and the radio and television technology based on network digitization has also become an important direction of information dissemination in China. Firstly, this paper briefly analyzes the related concepts, characteristics and advantages of network digital radio and television technology, and discusses the application status and Prospect of network digital radio and television technology.

With the rapid development of social economy, the development trend of network digitization is faster and faster. Under the influence of network digitization, the original development mode and communication mode of traditional radio and television media have changed accordingly, which has greatly improved the benefits of traditional radio and television, and has great advantages in maintenance. Based on the great advantages of network digital radio and television in current information transmission, it is believed that there will be a broader development space in the future.

1 overview of network digital radio and television technology

The core of network digital radio and television technology is Internet technology. In this technical system, the core part is the network server built with the help of the Internet. The specific composition includes the signals that need to be transmitted by radio and television, and there is a certain connection between the information to form a corresponding interface, and the user can also make choices independently. The user's choice is related to the intelligent operation of the server to provide users with customized information services. Through network digitization, users can select and obtain information faster and operate more easily. Users get rid of the backward way that they need cumbersome operation to obtain information in the past. With the help of the mouse, they can watch the program by clicking the page a few times. In addition, in the management terminal of the server, there is the function of collecting and sorting users' preferences. Through the statistics of users' normal viewing of programs, the server regularly pushes programs to users. In the server, there are also tools for users to make video, which can compress the video of each program and upload it to the client for users to browse. In addition, the highly automatic and programmed network digital broadcasting station is also a very prominent feature of this technology.

2 characteristics and advantages of network digital radio and television technology

1) High information sharing and fast transmission efficiency. The Internet gathers information from all sides, and integrates it into the corresponding platform through the information aggregation of the Internet, which realizes the sharing of resources to a certain extent. Compared with traditional radio and television, its advantages will be more prominent. And the server constructed by using the Internet also has the characteristics of high efficiency in information transmission, so as to improve the efficiency of information transmission. Relevant radio and television program producers can use computers to edit information, clarify the regional division of labor, and greatly improve the production quality and transmission efficiency of radio and television programs.

2) Improve the efficiency of editing. The producers of traditional radio and television programs often need to spend a lot of time on video editing and post-processing. In the production of network digital radio and television programs, the program editors only need to edit and process the collected information through the Internet, and then transmit the produced programs to the production office, and the styles of programs available are diverse. This greatly improves the transmission capacity and transmission speed of radio and television programs, and improves the timeliness of important information transmission. In the broadcasting of traditional radio and television, the image definition is often inversely proportional to the transmission efficiency. With the help of network digitization, the quality of TV program broadcasting can be greatly improved, the decline of program quality caused by electromagnetic field and human operation errors in the process of program transmission can be reduced, and the viewing experience of users can be effectively improved.

3 application status and Prospect of network digital radio and television technology

1) Application status of network digital radio and television technology. The integration of network digitization and radio and television began to develop more than ten years ago, and gradually put the technology on the right track in the long-term technical running in. Affected by the initial application of network digitization technology in China, the signal transmission and transmission need to be further improved. In the application function of technology, including the digitization of radio and television video signal and audio digitization. Compared with traditional radio and television, network digital radio and television has stronger anti-interference ability. In the development of audio digitization, in order to give the audience good audio-visual enjoyment, the development speed of digital video is consistent with that of digital audio. In order to realize the display of dynamic video, the sound signal is digitized, and the sound and picture synchronization is really achieved through the consistency of the frequency value of audio and image signal. Network digital radio and television technology meets the current needs of people for all kinds of information and provides greater convenience for people's work, study and life.

In order to further improve and perfect the radio and television technology, we need to deal with the following two aspects:
First, we should solve the network problem. To promote network digital radio and television, we need to solve the basic network problems. The development potential of network digital information technology is very huge, but there is still a long way to go in the development of functions. At present, the focus of attention is to continuously improve the broadband network IP, speed up the construction of the network and improve the network transmission speed. In the selection of transmission materials, at present, the special line for radio and television network is optical fiber network. However, in view of the high construction cost of optical fiber network, in order to improve the broadcasting efficiency of radio and television, we should reduce the operation cost and realize the high efficiency of information transmission through the combination of network IP technology and radio and television technology, It also provides a broader development space for the development of radio and television media.
Second, we should solve the problem of information sources. Under the background of information explosion, if China's traditional radio and television want to catch up with the pace of time exhibition, it should form a situation of complementary information and network resources. In the current form of rapid development of new media, traditional media are facing increasing pressure for survival. However, the influence of traditional media is unmatched by new media. In order to speed up the development of the two, we should promote the integration of traditional media and new media. The rapid development of Internet technology can continuously broaden the functions of traditional media, and gradually extend the business composition of radio and television industry to the coexistence of basic business, value-added business and expanded business. The basic business is mainly an integral part of the daily work of radio and television. Expanding business and value-added business can be operated through the network media environment, so as to realize the organic combination of network media and traditional media, give full play to the advantages of traditional media such as radio and television, and then make the network digital technology bring greater help to the innovation and development of radio and television technology.

2) The application prospect of network digital radio and television technology. In the Internet era, network digitization will develop rapidly, so it is bound to drive the development of traditional radio and television industry, so as to expand the influence of traditional media. According to the current people's personalized requirements for information, the transmission form of network digital radio and television will inevitably show a diversified development situation, and in the process of development, it will continue to improve the production methods and programming methods of programs, so as to improve the transmission efficiency and transmission quality of programs and enhance the perception of users. Therefore, in the future development, network digitization and radio and television should also catch up with the pace of the exhibition, continuously improve the transmission level and quality, and constantly develop a broader market in the development process, pay attention to the guidance of the user market, and improve and optimize the network digital radio and television technology in combination with the needs of the market and users, Only in this way can we really promote the sustainable development of China's media industry.

4 Conclusion

In short, in the context of the current development of information technology, the popularization of network digital radio and television technology has been irreversible. Under this development trend, traditional media must be fully aware of their own advantages and disadvantages. In the process of development, they should actively cooperate with online media to continuously improve the audience range, information transmission speed and transmission quality, and make effective use of resources. And in the future development, we should also realize the complementary advantages of traditional media and network media, so as to promote the development of network digital radio and television in China.