Building visual conversational system

Abstract

The invention discloses a building visual conversational system, which comprises a management device, a floor branch device, an indoor unit, a staircase unit and at least one networking isolator, wherein the floor branch device is in signal connection with the indoor unit; the networking isolator is in signal connection among the floor branch device, the management device and the staircase unit through a twisted-pair cable; a differential signal driver module used for converting a composite video broadcast signal to a differential signal is arranged in the staircase unit; a differential signal processing module used for converting the differential signal to the composite video broadcast signal is arranged in the floor branch device; and a self-adaptive equalization module is arranged in the networking isolator and used for performing the self-adaptive processing on the differential signal sent from the staircase unit and then transmitting the signal to the management device. The building visual conversational system can satisfy the requirements of signal transmission based on different distances between a signal sending end and a signal receiving end in a self-adapting manner, can enable the transmission of video signals to achieve high quality, low cost and long distance, and brings convenience to practical construction, debugging and subsequent maintenance.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a building video intercom system. Background technique [0002] Traditional building video intercom systems usually use two ways to transmit video signals, one is direct transmission through coaxial cables, and the other is to compress video signals into digital signals for network transmission through TCP / IP. [0003] When coaxial cables are used to directly transmit video signals, usually the effective distance for color signals can only reach about 600m, and during the transmission process, it is affected by factors such as connector contact impedance, building ground voltage difference, external signal radiation or crosstalk, etc. The image quality at the signal receiving end is poor, which leads to a serious decline in the display quality of the video signal after long-distance transmission in actual projects or greater interference, and even the color signal is severe...

AI Technical Summary

Problems solved by technology

However, due to the subtle differences in the degree of winding and impedance of different brands of network cables on the market, it is necessary to use different matching networks to enhance the video signal of the corresponding frequency band within different distances, that is, to achieve frequency band matching. The current frequency band matching is done manually. Therefore, due to the limitation of geographical location, many devices cannot be connected to the network recently, which brings a lot of confusion to the actual construction and increases the complexity of construction wiring; and the manually matched network is affected by uncontrollable factors such as network cable material and climate. , it is difficult to achieve post-commissioning and maintenance, which eventually leads to problems such as system instability and poor image quality

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