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Development of Chinese Industry Conference System

Date:2016年6月13日 17:48

At the beginning, conferencing products appear in order to increase the flexibility of the meeting, reducing operational complexity sound reinforcement system, and a microphone in the traditional structure and connections were a little sound system improvements and adjustments, the original parallel connection to serial connection by hand in hand, and the microphone can be remotely opened and closed in order to reduce the difficulty of use, which also belongs to a small branch of a conventional audio sound reinforcement, only supplement traditional audio amplification products.

With the rapid development of IT, international & domestic economic and social decision-making processes of democratization, efficiency and quality of people meeting the rising demand conferencing system it has also gone from simple meeting PA to the current combination of high-definition video , high-fidelity audio, high-speed computer network, computer hardware and software multimedia conferencing system. The most important audio and meeting attendance, voting data transmission technology has also experienced from analog to digital development process.

From the process of technological development, the development of the conference system has gone through three generations. The first generation of all-conference system simulation technology; second-generation conferencing systems on the basis of existing analog technology, the introduction of digital control technology, the "analog + digital audio transmission control technology"; the third generation of all-digital technology, namely "digital audio transmission + digital control technology." Wherein the second and third generation of the conference system level due to the application of intelligent digital technology, the system has improved significantly, it is also known as digital conferencing systems or smart conferencing systems.

The first generation conferencing system is meeting to discuss system-wide simulation technology, structure and function are relatively simple, the way audio analog signal transmission and processing, the user can simply press a switch statement, the system is not intelligent the central controller, primarily for small meeting rooms.

Second-generation audio conferencing system based on analog transmission reservations on the introduction of the digital control technology, management statements, voting, meeting attendance, simultaneous interpretation and video tracking and other functions. As a result of the digital control technology, the second generation of intelligent level conference system significantly improved the function of the system is also increasingly rich, these improvements have greatly improved the efficiency of the meeting. But because the system is still using analog audio transmission mode, the signal lines must conferencing unit with other equipment lines (such as lights, power cable, television camera cables, speaker cables, etc.) separate laying distance, otherwise the analog audio signal transmission due to interference and distortion, but this requires a lot of on-site due to limitations of the building structure is difficult to achieve; in addition, the analog audio signal level attenuation increases with the transmission distance, and therefore, an analog audio signal transmission over long distances when (over 50 meters) sound quality deterioration problem difficult to solve; another disadvantage is that analog audio transmission, transfer each way voice requires a dedicated audio transmission line, which resulted in a large number of cables need to lay, laid in narrow space venue wiring difficult, you need to install the operation control mixer and other equipment, the system is also more complex.

Conference System as a special dedicated electronic systems, regardless of the functional structure, the basic sound collection and restore functionality (ie, can play a clear and high-fidelity sound spokesman) is the most important, so conferencing equipment should be able to stable and clear transfer and play sound and effective elimination of interference, noise, distortion, effects of crosstalk, and said transmission analog audio conferencing system problems exist such that it is gradually being replaced by all-digital conference system in the modern venue.

The third generation conferencing system is fully digital conference system in which audio signals and control signals are carried out by way of a digital signal transmission and processing. Its core technology is a multi-channel digital audio transmission technology, through the use of an analog / digital (A / D) and digital / analog (D / A) conversion technology, the conferencing equipment to capture audio for digital signal processing and digital signal encoded in the communication line transmission, implemented on a physical line simultaneous transmission of multi-channel audio signals.

Third Generation conference system from the fundamental solution to the interference on the audio signal analog transmission exists, crosstalk distortion, signal attenuation after long-distance transmission and other issues, the conference audio transmission and processing digitization, significantly enhanced anti-jamming capability, long distances, no loss, low noise transmission conference audio signal, the system frequency response and high fidelity. At the same time, more easily through a standard interface between the conferencing equipment, can be widely used in various types of meeting rooms, large conference venues, sports stadiums and other occasions

TypeInfo: Industry News

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