OFweek smart home network news: monitoring system has passed the first generation of analog video surveillance systems, second-generation digital video surveillance systems, has developed to the third generation of network video surveillance systems, monitoring system management has also gone from air defense to air defense technology The process of combining, managing from a single point to a centralized network. As the second generation of monitoring technology following analog monitoring, digital surveillance provides users with a cost-effective monitoring solution. Currently, digital surveillance has firmly become the video surveillance solution that dominates the overall video surveillance market, and mature deployment and financial, commercial Among other industries.
Mobile video surveillance technology is the application of video surveillance technology in mobile networks and mobile terminals. Its purpose is to provide real-time video surveillance services for mobile terminals. It is a product of multi-technology convergence such as wireless network technology, streaming media technology, and video surveillance technology. , Mobile video surveillance system client is installed on the client computer, mobile phone control software for remote viewing real-time monitoring screen and control camera, and can be remotely armed and disarmed through the client software, set the alarm switch, download and store on the server On the history video, etc., with a simple and easy to use, stable and reliable features.
Acquisition front-end: The collection front-end is installed by the user at the monitoring site, including smart network cameras, wireless alarm triggers, etc., for collecting alarm information and monitoring images. Monitoring terminal: The monitoring terminal refers to the equipment used by the user to receive alarm information, view the monitoring screen, and control the collection front-end, including mobile phones and computers. Service room: The service room is a dedicated server room set up by the communication company for the normal operation of the system. The room includes the address server, short message server, and network hard disk server. The service room is maintained by the communications company. In addition to the transmission network, this constitutes a traditional simple mobile monitoring system.
The intelligent mobile monitoring technology is rapidly entering every household. The cameras of all major manufacturers are endless. There are many Internet manufacturers. Although there are many manufacturers in the surveillance industry, too many smart cameras are the same. , Features fancy and not applicable is difficult to achieve true home security. More like a toy. The author believes that mobile monitoring technology has great potential in the field of smart home, and may even become a core component of smart home. Some people have said that routing is the core of smart home, but it is not. Routing is just a way for smart homes to access the Internet, and the Wi-Fi security factor is the lowest among existing wireless transmissions of Wi-Fi, Bluetooth, Z-Wave, and ZigBee, as people Security and privacy are getting more and more attention, and routing is naturally more difficult to become the core of smart home. Mobile monitoring formally starts from the perspective of family members' personal and property safety. The mobile monitoring front-end is the center, and the monitoring and control of the network will inevitably become the direction of smart home development.
First of all, imagine that if there is no mobile monitoring technology, then even if the smart home, when we operate in the terminal on the home appliances and so on, if a blind person is on and off, I believe it will not take a few times he will not know that the light is Open or closed, if a deaf person is listening to the radio, he will not know if the broadcast stops. And mobile surveillance technology entering the smart home will give family members a clairvoyant look that will allow family members to understand the situation in the home in real time. Door magnetic alarms, video doorbells, human body infrared sensors, temperature alarms, flood alarms, smoke alarms, emergency call buttons, infrared remote controllers, etc. use ZigBee or Z-Wave wireless connection through the monitoring front end Connected to the monitoring front-end, when the magnetic door alarm occurs, the monitoring front-end first adjusts the lens direction to the direction of the incident and takes a photo-push alert message to the mobile phone client, and simultaneously records it to the local hard disk or cloud to realize the full criminal process. The process records can even link the cell security room so that the security can be rushed to the scene the first time to further ensure the safety of the family. At the same time, you can choose to send out strong light, laser, and sound alerts. I believe that even criminals with better psychological quality It is difficult to maintain calm under this strong light and strong environment, and it is possible to terminate the crime to ensure the safety of the user's property.
If there are elderly people in the family, young people can not always be with the elderly, then the emergency call button is a good choice. When the old man happens, just trigger the alarm camera to send the current state of the old man to the mobile phone, we can Dial 120 at the first time to win valuable time for the rescue of the elderly. I believe this is also an option for our filial piety.
Through the networking of infrared remote controllers and front-end monitoring devices, we can also realize non-intelligent devices in the home: televisions, air conditioners and other devices that can be remotely controlled can be remotely implemented, which can realize the transformation of smart homes at the lowest cost. , I believe that especially the remote control of air-conditioning can be achieved before we get home to turn on the air-conditioning, so that in the hot summer home can enjoy a cool and comfortable family environment is bound to be a good choice.
Second, Wi-Fi is a technology that allows electronic devices to connect to a wireless local area network (WLAN), typically using 2.4G UHF or 5G SHF ISM radio frequency bands. Wi-Fi has a high-speed transmission speed, but its security and high power consumption have been criticized by people.
Bluetooth is a standard wireless communication protocol based on a low-cost transceiver chip with a short transmission distance and low power consumption. Since the devices use radio (broadcast) communication systems, they are not connected on physically visible lines, but quasi-optical wireless paths must be feasible. However, Bluetooth devices can communicate with up to seven devices in a piconet. This also determines that Bluetooth is bound to become the first choice for smart home networking.
The rise of ZigBee and Z-Wave wireless technologies has made it possible for mobile surveillance technology to enter the field of home security and lead smart homes. Z-Wave is a radio frequency-based, low-cost, low-power, high-reliability, short-range wireless communication technology suitable for networks. The effective coverage of the signal is 30m indoors and over 100m outdoors, making it suitable for narrowband applications.
ZigBee is a low-power LAN protocol based on the IEEE802.15.4 standard and is a short-range, low-power wireless communication technology. This name (also known as the Zigbee protocol) originates from the bee's eight-character dance, in which the bee is transmitted by flying and “zigs†to “dance†the wings to communicate with their peers the position information of the pollen. That is, bees rely on this way to form a communication network in the group. The characteristics of close range, low complexity, self-organization, low power consumption, and low data rate determine that it is suitable for use in the field of automatic control and remote control, and can be embedded in various devices. In short, ZigBee is an inexpensive, low-power, short-range wireless networking communication technology.
From the perspective of technology security, the Wi-Fi, Bluetooth, Z-Wave, and ZigBee wireless transmission technologies have the lowest security factor of Wi-Fi, and we often take the approach of replacing the Wi-Fi password frequently. Imagine that in the future, smart homes in the home will use dozens or even hundreds of Wi-Fi connections. Will that be a terrible thing to replace a Wi-Fi password? Routing will inevitably become an interface for smart homes to access the Internet. The Bluetooth networking allows only seven access points. Even if it has the advantages of low power consumption and high-speed transmission, it is difficult to be the first choice for smart home networking. The invention of Z-Wave and ZigBee wireless technology will even make mobile surveillance technology even more powerful in the field of smart home security.
Finally, the traditional mobile video surveillance system is generally composed of four parts: mobile terminal, transmission network, management center, and monitoring front end. The intelligent mobile home monitoring technology has changed in the above. Here the author simply boils down to: mobile monitoring Management terminal, transmission network, intelligent monitoring front-end. Compared with traditional network video surveillance, mobile video surveillance has the advantages of wide network coverage, no space limitations, ease of use, and high real-time performance.
Streaming media technology is the basis of video surveillance technology, and the two major technology cores of streaming media technology are video encoding and decoding technology and streaming media transmission technology. H. 265 The development of formal video coding technology. H. 265 is the ITU-T VCEG following H. New video coding standards developed after 264. H. The 265 standard revolves around the existing video coding standard. 264, retain some of the original technology, while improving some related technologies. The new technology uses advanced techniques to improve the relationship between codestream, encoding quality, latency, and algorithm complexity to achieve optimal settings. Specifically, it includes: improving compression efficiency, improving robustness and error recovery capability, reducing real-time delay, reducing channel acquisition time and random access delay, and reducing complexity. Due to the algorithm optimization, H264 can implement standard definition digital image transmission at speeds lower than 1 Mbps. The H265 can implement 720P (resolution 1280*720) ordinary high-definition audio and video transmissions at transmission speeds of 1 to 2 Mbps. With the speed-up and fee-reduction policies introduced in recent years, under the promotion of this policy, the cost of data traffic will be greatly reduced and the transmission rate will be significantly increased. The development of these two technologies will inevitably make it possible for users to use data traffic to view high-definition surveillance.
The intelligent monitoring front-end sends monitoring real-time video, pictures, and alarm information to the mobile monitoring and management terminal through the network, which can realize on-site monitoring and operation control. Here, the mobile terminal and the management center do the same. Through the P2P network transmission method, the mobile terminal and the monitoring front-end realize the interaction of directly connected video alarms and other information. It is more secure to transfer personal privacy without passing through the server. This is bound to be a mobile monitoring technology. The trend of intelligent application in the field of home security.
The intelligent monitoring front-end: Intelligent technology such as face recognition, number statistics, motion recognition, item care, and legacy items has added to the mobile monitoring technology an intelligent label. Laser tracking, white light warnings, and pre-recorded audio playback make the surveillance front end act like a smart machine butler. I believe that smart cameras will become an important part of smart homes in the near future. Mobile surveillance technology not only leads home security but also becomes a core component of smart home.
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