resolving power

Buying surveillance cameras, of course, the clearer the better, but what is the basis for choosing the clarity of the lens? Those who understand will know that the higher the resolution and pixels of a camera, the clearer the image captured. For ordinary household surveillance cameras, choosing high-definition cameras with 1 million, 1.3 million, or 2 million pixels and resolutions of 720P, 960P, or 1080P can basically meet the needs of use.

However, the higher the pixel size, the more memory space it occupies, and under the same conditions, the storage time becomes shorter. Therefore, when considering clarity, we also need to consider the issue of storage time.

Storage method

When installing a household camera, people generally worry about the issue of video storage. After all, if the stored video is gone, the camera loses its ability to restore the truth. There are three storage methods for monitoring: network hard disk storage, local storage (SD card storage), and cloud storage.

Network hard disk storage: suitable for situations where there are many home intelligent monitoring devices that require long-term video recording.

Advantages of local storage: When powered on, the card will automatically record video without any settings and supports offline recording. However, this is an automatic loop recording, which will automatically overwrite early recordings after TF storage is completed.

Cloud storage: It is not afraid of monitoring equipment or hard disk, TF damage, and can access cloud video data at any time. With the development of the Internet, cloud storage is undoubtedly the mainstream direction of future storage development.

Connection method

With the development of technology in the era, the networking methods are constantly changing from analog monitoring, digital analog integration to IP network monitoring. IP network monitoring should be the development direction of future networked monitoring.

The current smart home surveillance cameras are all network surveillance types, and the network connection methods for these cameras are also divided into three types: ① Ethernet cable connection; ② Wireless connection; ③ AP hotspot connection; Each of the three methods has its own advantages and disadvantages, which can be chosen according to the actual situation. For example, using Ethernet cable connection can provide stable network, but wiring may be inconvenient.

For example, wireless connection is easy to install, but WiFi networks are prone to instability; AP hotspots need to be used within the local area network and have distance limitations. However, considering user needs and user experience, there are many models on the market that support connection methods above 2.

Power supply mode

There are three types of power supply methods for monitoring: independent power supply, centralized power supply, and POE power supply. However, for large-scale engineering projects, each has its own advantages and disadvantages.

For example, independent power supply maintenance is easy and has good anti-interference ability. But the construction is troublesome.

Centralized power supply maintenance is simple, with low energy consumption, but poor anti-interference ability, and the monitoring system is prone to paralysis.

POE power supply, no power supply, the key lies in the network cable and distance, and the equipment cost is high.

video coding 

Video encoding refers to the method of converting a video format file into another video format file through specific compression techniques. Why do videos need to be encoded? Not to mention the complexity, in simple terms, it is for compression - processing redundant data, compressing file size, reducing bandwidth, and shrinking storage space.

With the rapid development of ultra-high definition technology, cloud storage and other technologies, new requirements and challenges have been put forward for the transmission and storage of massive video data. H.265， Even H.265+has emerged, improving video compression efficiency and greatly reducing bandwidth and storage costs, which has a positive promoting effect on the popularization of high-definition network video surveillance.