working principle of baby monitor
The working principle of the network baby monitor is to use the camera according to a certain number of shooting frames to convert the picture information recorded every minute into a continuous video according to a specific suppressed transcription packaging technology (commonly MJPEG, H.264), and pass the limited or The wireless network is sent to the Web server, and the user only needs to access the independent DDNS address through any receiving terminal platform, and then they can browse these images directly on the WEB SERVER. Since the network baby monitor has no ability to identify the hardware of the receiving terminal platform, all the video data streams sent out through the monitor are pre-encrypted, and only after the user terminal platform enters the correct password can enter the monitoring meeting To browse or set.
In terms of transmission mode, the frame code transmission mode used by the network baby monitor is the Multicast Frame mode, that is, the data communication mode of a single sending unit to multiple receiving units. This transmission method has stronger data transmission capability than the “point-to-point” unicast frame (Unicast Frame) of ordinary wireless baby monitors. Since the conversion result is a data packet based on the TCP/IP network standard and is directly transmitted using the RJ-45 Ethernet interface or WIFI WLAN wireless interface, the monitoring terminal does not need to download and install any APP application patch package or APP application software, and it can be directly transmitted. Use, thereby greatly reducing the skill requirements for users.
In terms of security, by setting up multi-level user rights, only the user with the highest level of authority (ADMIN) can set or change the entire system. Users without permission (LIMITED or USER) cannot receive images.