The basic model of the current multimedia information distribution system
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Since the information release system has been in the market, the system architecture has undergone several generations of changes. It was originally composed of a display screen and a DVD player or a PC. After that, network technology was introduced, and a dedicated network media player replaced the traditional DVD or PC player. Forms, functions become richer, and applications become more diverse. Therefore, some people have juxtaposed it with print media, radio, television and the Internet, which is called "fifth media", and has the function of releasing information information to specific people at a specific time and at a specific place.
As far as the overall architecture of the multimedia information distribution system is concerned, whether it is the C/S framework or the B/S architecture, the whole system hardware is mainly divided into three parts: the server host, the player, and the screen. In some cases, the player and the screen are combined. First, the integrated system software, the control system software is mainly divided into server software (installed on the server host) and terminal software (installed on the player). The figure below is a basic model of it:
From its basic model, it is known that the simplest single player information distribution system or a large system with hundreds of players, its information flow is from the host, downloaded to the player through the network, the player Reproduce the information on the display screen. Therefore, as long as there is a network coverage, information can be transmitted and advertisements can be released.
The advantages and disadvantages of the basic model of the current information release system
From the perspective of system structure, this basic model has the following advantages:
1). The basic structure of the mainstream consists of three parts: the host, the player, and the display. The overall system structure is relatively simple.
2). The structure is clear, and each display terminal is directly connected to the specified player.
3). The control mode is flexible, and the display screen and display mode of each player can be controlled independently (that is, the display screen can be the same or completely different).
There is a two-sidedness in any system. The advantages of this basic model are outstanding, but it has many shortcomings. Below we analyze the problems of the structural model from the aspects of safety, cost and management.
1). Hardware equipment has a low safety factor
The player is a precision device, which is not only relatively expensive, but also requires a relatively high external environment for its operation. However, in the basic model, the player is directly connected to the display screen. The installation environment must be located in a public place where the display screen is located. Not only is the traffic volume large, but also complicated, it is easy to cause the player to be damaged or even be Pirates, and the working environment in public places is relatively poor: dust, temperature difference, and humidity change are not normal, which is not conducive to long-term stable operation of the player.
2). Low information security factor
In the whole system, the multimedia information is sent from the host and finally stored in the player, so the player information security is worthy of attention.
Usually there is an external data interface on the player, important data stored on the player may be maliciously copied through these interfaces, and even the player's memory card or hard disk will be stolen; in addition, there may be illegal players through the player. The data interface rewrites the playback content and plays illegal content.
3). Higher engineering costs
The basic model requires that each screen must correspond to a player. Assuming 20 screens, there must be 20 players. However, the price of the player is often relatively high. In this way, the cost of the project must remain high.
4). Equipment is not easy to manage and maintain
The player is scattered around each display screen, such as a weak electric pipe located behind or near the display screen. If the player fails, it is not easy to disassemble and install, and must be on site to perform maintenance, which may affect the normal business.
Third, increase the transmitter to make up for its shortcomings
The shortcomings of the traditional basic model are obvious, so how to solve these problems? Utech recommended the addition of twisted pair video and audio transmitters to the system, and these problems were solved.
The twisted pair video and audio transmitter consists of a transmitter and a receiver. It needs to be used together. It uses a network cable as the transmission medium to transmit the player's VGA video and stereo audio signals to the far end of up to 500 meters. The transmitter can be used to centrally place the player in a safe, independent, and enclosed room space, extending only the video and audio of the player to the display terminal. Therefore, the direct connection with the display screen is the AV twisted pair receiver. Since the volume of the transmitter is much smaller than the size of the player, the decoration is simple and convenient, and the advantages of engineering wiring and equipment safety are obvious. in:
1) Improve the security of hardware devices and information
The player is placed in a safe room to increase the safety factor. We don't have to worry about high-end player hardware being "tuned" or lost. The twisted pair transmitter does not have a mobile memory interface, which effectively prevents data loss or malicious tampering, and is very suitable for use in high privacy situations.
2). Effectively save engineering costs
Assuming there are 20 display information distribution systems, and the display content of each display is exactly the same, then one screen is not required for each screen. We can use the method of adding a transmitter, just use a player, you can completely copy the contents of this player on the 20 display screens, complete the system expansion and upgrade, which can greatly reduce the cost, if you need more Multi-point display screen, just need to add a transmitter.
3). Low maintenance cost
All players can be placed in a safe and independent place. The maintenance staff can maintain all the players in the same place during maintenance, and the work efficiency is greatly improved. During maintenance, if a player is found to be faulty, simply remove the player from the rack and it will not affect the normal operation of the display terminal.
4). Transmission distance is good
The Utopia audio transmitter has a maximum resolution of 1600×1200, which enables high-definition video transmission and truly restores high-quality video images. At the same time, the transmitter has a long extension distance of up to 500 meters, which can effectively compensate the limitation of the signal distance of the LAN network and expand the coverage area of ​​the information distribution system.
5). Easy to use and easy to install
The transmitter adopts network cable routing. The network cable routing is the most common and convenient in the integrated wiring, and the video and audio are extended together to a place we need through a single network cable, without additional wiring, which is very convenient, and brings great engineering installation. Great convenience. And directly connected to the display is a small-sized receiver that can be hung directly behind the display, which is very beneficial for the installation of the project and the later decoration.
Therefore, it is necessary to increase the transmission equipment in the traditional information distribution system to make up for its shortcomings.
Fourth, increase the information distribution system model classification after the transmitter
According to the demand, Youpupu multimedia information publishing system is generally divided into stand-alone type, broadcast type, broadcast type, interactive type, and composite type. These models have no advantages and disadvantages, only suitable for the project site and customer needs. difference. From a complex point of view, the single model is the simplest, suitable for small shops, small companies, etc.; the complex type is the most complex, including broadcast, broadcast and interactive, suitable for cross-regional industry customers and group companies.
Single model
The single model is that the management host separately controls one media player, and the media player only corresponds to one display terminal, and the media player and the display terminal can be integrated into one body, such as a single point advertising machine.
Single-type models can also have transmission equipment. When the media player selects a large-sized ordinary PC host device, because the PC host has a large body, it is inconvenient to install near the display screen, so there is a certain distance from the display device, which needs to be used. Transmission equipment to ensure the quality of video and audio transmission.
Broadcast type
The broadcast type means that the whole system only contains one multimedia information player, but there are multiple display terminals. The mode is to copy one signal into multiple copies and send them to each display terminal. The display content of each terminal is completely consistent and completely synchronized. Since the broadcast type multimedia player is often far away from the terminal display device, in order to ensure the transmission quality of the high definition video and audio signal, it is necessary to use the multimedia transmission device.
Distribution type
An information distribution system has a plurality of display terminals, and each of the display terminals has completely independent broadcast content and modes, that is, each display terminal and the corresponding play host form a relatively independent group, each working independently, without mutual interference, in need It can be easily set to play the same picture, and this mode is called the distribution mode. Each display terminal of the distribution mode needs to be supported by a separate multimedia player.
Interactive
The interactive information publishing system is a process of human-computer interaction. For example, through the combination of a touch screen and a media player, the content of the media player is displayed on the touch screen, and the user can click on the touch screen to order the favorite program when the user touches the touch screen. When the screen is touched, the system automatically reverts to the default other program channels. With the development of technology, interactive technologies come in a variety of forms, such as: remote control interaction, voice interaction, and SMS interaction.
Compound
The composite type is a combination of all the above modes, including the distribution type, the broadcast type, and the interactive type. The usage method is the most flexible, and the most suitable system can be matched according to the situation of the project site.
The several models summarized above relate to different structures from large to small, from simple to complex. Each structural model has its own characteristics. In practice, it is not possible to blindly adopt a certain structural model, but to weigh the pros and cons from system security, cost, post-maintenance, management, etc. according to the actual situation, appropriately in the system. Adding a transmitter can achieve twice the result with half the effort and make the most cost-effective information distribution system.
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