A closed-circuit advertising machine is a television system that transmits high-frequency cables, optical cables, microwaves, etc., and distributes and exchanges sounds, images, and data signals among certain users. The current closed-circuit advertising machine (catv-cabletevelision) has grown from two or three channels to dozens of channels and more, from small systems of dozens of users to large systems of several million, with transmission distances from several hundred. Rice developed to hundreds of kilometers. From simple cable transmission to integrated system integrating optical cable, microwave and cable, it has evolved from a single transmission TV program to a computer and voice switching network technology to realize the transmission of multiple information and multiple services. Transmission has evolved to adjacent-frequency transmission and is developing in the direction of digitalization, multi-functionality, industrialization and nationwide networking.
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The advertising machine program also includes wireless terrestrial broadcast advertising methods, such as the car TV advertising solution launched by Shanghai Oriental Mobile TV. At present, Shenzhen Lihe Company has the largest share in the terrestrial broadcasting system.
The main feature of the advertising machine program is to use the channel mode to publish advertisements.
System advantages:
For mobile public places such as buses, signals can be accepted without wiring; in addition, the coverage area is large.
System disadvantage:
First of all, the cost of building an advertising machine system is very high, and the transmission distance is far, the signal will be attenuated, and a relay such as a signal amplifier must be used, which further increases the construction cost. The operation of the advertising machine is complicated and requires regular maintenance by professionals. Remote cannot be implemented and cannot be managed by the terminal. The entire system requires more manpower and material resources for maintenance.
The second is to use the channel broadcast method. If you need to play different advertising content for different customer objects, you need to add multiple channel support, and the subsequent maintenance and use costs are very high. In addition, the resources of TV channels are limited and cannot be expanded without restrictions. Therefore, for the increasingly high demand for segmentation advertisements, the advertising machine program still has fatal flaws.
In addition, the advertising machine system solution is very inconvenient in use, and requires professionals to skillfully apply the system, and ordinary personnel cannot immediately operate skillfully.
Finally, the advertising machine system solution does not have professional management software for customer management, system management and terminal management for operations management and maintenance, etc. These workers need to be manually performed.
In addition, if you encounter an area with a bad signal, the terminal display effect is very unsatisfactory and even disgusting.
1.2 stand-alone playback
Stand-alone playback refers to playback on a DVD player or a dedicated advertising machine using a hard disk/memory card (such as a CF card). These stand-alone playback devices are not connected and play independently. Although it is simple and convenient to construct such a system, it is necessary to manually update the program to update the program, and remote management cannot be realized, and timely information playback cannot be realized. The advertisement content cannot be updated in time, the specific time period for the advertisement to be played cannot be specified, the play record cannot be provided, and the rolling subtitles of news, weather forecast, etc. cannot be broadcasted immediately to increase the appeal to the audience, and the picture cannot be played and inserted immediately. Therefore, stand-alone playback cannot meet the requirements of the “fifth media†information master and audience for the rapid release of advertisements, multimedia information and efficient operation management. With the further promotion of "Fifth Media" and the development of media playback technology, the way of single player playback will gradually be replaced by advanced network playback systems.
1.3VOD server + set top box
VOD (VideoOnDemand) is an interactive multimedia video on demand. It is a comprehensive technology that is rapidly emerging with the development of computer technology and network communication technology, integrating computer technology, communication technology and TV technology.
It utilizes the advantages of network and video technology to realize on-demand viewing and arbitrary playback of programs, and integrates dynamic video images, still pictures, sounds, texts and other information into one, providing users with real-time, interactive, on-demand on-demand services. The set-top box can connect the TV to the network to obtain rich media content such as data, voice and video that the user needs, and then decompress and signal the data in real time and play the display on the TV.
Although this brings convenience to the user, it still cannot meet the demand for advertising multimedia playback under the existing conditions. The video playback of the Vod server + set-top box is that after the user initiates the request from the client, the server transmits the program in real time, which will extremely occupy the bandwidth and fail to achieve the high quality required for the advertisement to play. When the user's concurrent increase gradually, the playback effect will be greatly affected. At the same time, due to the use mode of "VOD system is client-initiated", it is inevitably determined that it cannot uniformly manage the playback.
1.4PC player playback
PC playback cannot be centralized, centralized, and centralized. Terminal personnel can control it at will, or change the content at will. There are many unsafe factors (such as freely deleting playback content). The central manager cannot control the playback of the content. Except for the content being played, the order and time of playback cannot be controlled by the administrator, but by the user. It is very difficult to manage distributed terminal playback.
The front-end PCs used for playback all use the Windows operating system, which is highly susceptible to viruses, causing embarrassment of local or all networked systems, and now some bugs in Windows itself sometimes cause system crashes. And video display using PC devices may often be interrupted.
In addition, the use of a normal PC as a front-end playback device is bound to have problems of human operation and intervention, which adversely affects security and does not guarantee that unaudited content is played out.
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