University IP Network Broadcasting System Solution
► Overview and needs
The university campus is large, generally thousands of acres, and consists of multiple campuses and branch campuses. There are different functional zones on campus. The functional requirements of campus broadcasting are basically used for self-run programs of campus broadcasting stations, the promotion of campus culture, and listening tests for level 4 and 6 of English. Generally, there are no requirements for music bells and radio exercises, but due to their more functional divisions and larger areas Large, so different districts are required to broadcast different campus radio programs at the same time. Each campus and branch campus can operate independently, and the broadcast master control center can also be managed centrally.
Modern university campuses, computers and networks have spread over every place of work and study in the campus. Therefore, the construction of the broadcast system can adopt the IP network broadcast system, which is based on the existing LAN / WAN network. No separate wiring is required during installation. Program transmission based on IP network, each broadcast point can have its own independent broadcast program, and can perform two-way call broadcast to any or all broadcast points. Its IP network broadcast terminal can order the program of the broadcast audio server. Diversified broadcasting methods have completely solved the problems of short transmission distance, poor sound quality, complicated maintenance management, and lack of interactivity in the traditional broadcasting system. It provides a feasibility for the university to construct a broadcasting system that meets the needs of modern education and teaching.
IP network broadcasting is a trend in the development of campus broadcasting systems. The construction of the university's IP network broadcast system follows the principles of "advanced and applicable, economical and practical, safe and reliable, mature and stable, powerful and cost-effective". It also takes into account important factors such as construction and maintenance, while also leaving room for the future development, expansion, and reconstruction of the school. The design of the whole campus broadcast is systematic, complete and comprehensive. The system can fully meet the requirements of convenient operation, simple maintenance and easy management. The design scheme is scientific, reasonable and practical.
The IP network broadcasting system adopts a fully digital audio processing scheme. The transmission system is based on Ethernet and cooperates with the TCP / IP protocol to transmit audio signals in the form of standard IP packets over LAN / WAN and the Internet to realize the lossless transmission of data. , So that the problems such as distortion and noise that occur in the transmission process have been completely resolved. Ensure that the system has good stability and scalability. With the rapid development of the network today, the campus campus broadcast design uses the IP network broadcast system to transmit, which can be very flexible to connect the broadcast sub-control and IP network broadcast terminals to the computer network, which has a very broad expansion capacity. It can truly realize point-to-point broadcasting, unlimited partition grouping, and management of remote, humanized, intelligent and economical broadcasting system.
The design university IP network broadcast system is mainly composed of four parts: sound source part, control part, transmission part and receiving part.
Ø Sound source part:
The sound source is generally divided into analog sound source and digital sound source. Such as: computer (system audio server), high-quality DVD player, touch double deck, digital tuner, broadcast microphone, etc.
Ø Control part:
The university's IP network broadcast system is based on the TCP / IP architecture, so audio collection, playback management, and remote calling can be achieved through network distribution, regardless of geographical restrictions. The network audio server has a built-in automatic playback engine, which can automatically point, group, or broadcast broadcast programs to various regions based on a preset playlist.
Ø Transmission part:
At present, the transmission requirements of university IP network broadcast systems are bandwidths of 128Kbps. The construction of general university campus networks has reached the requirements of 10M / 100M networks. It can fully meet the requirements of university IP digital network broadcasts for transmission rates, and ensure that broadcast signals are reliable and stable. Voice The signal is clear.
Ø Receiving part:
According to the general situation of university campuses, there are three ways to design the IP network broadcast reception. One is to use the IP network speaker to receive directly; the other is to use the digital IP network broadcast terminal to receive and demodulate the audio signal and send it to the fixed resistance speaker. Listening; In addition, considering the economy, it can also be received and demodulated through the IP network (on-demand) terminal, and then sent to the power amplifier to turn into a constant-pressure broadcast signal, and listen to the broadcast with various constant-pressure speakers.
Ø Complete functions
The system covers the functions of traditional public broadcasting systems, such as unified broadcasting, zone broadcasting, background broadcasting, emergency broadcasting, scheduled playback, unattended, telephone broadcasting and other functions.
Ø Audio on demand
The system has a real-time on-demand function, which enables the administrator to communicate with the system server in real time at the sub-control workstation to achieve interaction. Free on-demand server program content.
Ø Paging intercom
The system can realize any paging and two-way intercom function. That is, the IP network paging intercom terminal of the main control center and the terminals in each campus or branch campus can conduct two-way voice intercom.
Ø Leader's remote speech
The system supports the online speech function of leaders. Leaders do not need to go to a special broadcasting center, they only need to install the IP network broadcast paging intercom terminal IP-TY6702, and they can easily realize remote speech. Speak to both the entire area and the optional area.
Ø Remote management
Where it can access the Internet, installing the IP network sub-control software can monitor and operate the entire system.
Ø Permission Setting
The system can set various roles, including the main administrator, supervisor leader, query administrator, and control administrator. Administrators with different permissions can perform different authorized operations. Unauthorized operation is invalid.
Ø Energy saving and environmental protection
When there is no signal input, each IP network broadcast terminal in the system can automatically cut off the power of the external power amplifier to avoid long-term standby operation of the power amplifier, which can extend the life of the equipment and achieve the purpose of energy saving.