Development trend of visual intercom system

Building intercom system will be the basic configuration of intelligent building community. In the design of new commercial housing in some large and medium-sized cities, it is mandatory to configure the system in new buildings and unify the wiring and product interfaces. Different manufacturers use different transmission modes and signal interfaces, and the products are incompatible with each other, which leads to the socialization of engineering construction and after-sales service, and many systems that have passed the warranty period are difficult to maintain. Relevant departments have noticed this problem, so the standardization of wiring and product interface has become the general trend. The improvement of policies and regulations since this year has further strengthened the reliability of product quality and the strength of the industry. 1 July, the industry standard of building intercom system (referred to as "GA/T-72-2005", which belongs to the industry standard of the Ministry of Public Security and took three years to formulate) was newly promulgated by a company in Shenzhen in cooperation with the TC- 100 Standardization Committee of the Ministry of Public Security. The biggest difference between this standard and the original standard is the addition of EMC (electromagnetic compatibility) index and sound matching test.

From the demand market, bus structural technology products have entered a period of flat demand, but the overall market demand is still heating up. The demand of building intercom system is always closely related to the development of real estate industry. More than 90% new commercial buildings in big cities have designed this system. From the development trend, the building intercom system is a necessary system for new residential quarters. In addition, some users of old buildings and unit houses need to be equipped with the system, and most county-level new buildings have not yet involved the system. It can be seen that there are still many blank spots in the market to be tapped.

The networking trend is that some products are developing to full-service IP data service network: on the basis of the existing visual intercom system, using the existing broadband network data transmission platform, taking the complete digital transmission of voice and video as the means, and realizing information storage, forwarding and * * * sharing as the application goal, each user is assigned a visual call number based on IP address through the visual terminal. Provide users with a variety of personalized multimedia services, such as network video phone, network phone, video monitoring, community/building intercom, community public information release, video on demand, visual distance education, IPTV and so on. And realize the interconnection with "3G" network. The trend of intelligence is to integrate a whole set of family intelligence functions (including visual intercom, closed-circuit monitoring system, parking lot management system, three-meter cc system, background music system, electronic patrol system, access card system, property management system, broadband network and access control system, etc.) into the system. ). Simply put, the trend of smart home is to use ARM embedded technology to access the Internet and telephone signals, and convert them into control signals, which are interconnected with the supporting home appliance control system through an RS485 home appliance control data bus.

As far as market products are concerned, these two products with different technical routes have developed rapidly. Smart home products can be regarded as a great integration of the proprietary field of smart home and the existing visual intercom field, and the technology is relatively mature. This position has not only Chinese and foreign established powerhouses such as GE, Honeywell, Samsung, Tsinghua Tongfang and Qingdao Haier, but also large-scale new players in the video intercom industry such as Shidean, Huiruitong, Anjubao,, Zhengxing, etc. The technical bottleneck of IP networking is relatively high. Now Taiwan Province Mega Digital, Shenzhen Xingtianxia and Fujian Guanlin are mature in technology, and all of them have launched products. According to the maturity of technology, the current smart home video intercom products only stay in analog audio and video signals, and the wiring still adopts RS485 mode (dual audio, video and dual signal lines); IP networking video intercom products realize the digital collection, transmission and compression of audio and video signals, and the wiring can also be directly completed by a LJ45 network cable and a power cord.