Which of CCD and CMOS is more suitable for high-definition network cameras?

There are three core components of the network camera: lens, image sensor and compression processing chip. Among them, the image sensor is the core of the image acquisition and processing part.

There are two types of image sensors: CMOS and CCD. The differences between the two have been discussed a lot, mainly reflected in several aspects such as sensitivity, cost, noise, power consumption, etc .: 1) Under the same pixel size, the sensitivity of the CMOS sensor is lower than that of the CCD sensor 2) The cost of CCD sensor is higher than that of CMOS sensor; 3) The resolution of CCD sensor of the same size is usually better than that of CMOS sensor; 4) Compared with CCD sensor, CMOS sensor has more noise; 5) CCD sensor except in power management In addition to the higher difficulty in circuit design, the high driving voltage makes its power consumption much higher than that of CMOS sensors.

In the era of standard-definition surveillance, whether it is an analog camera or a standard-definition network camera, the most widely used is the CCD. In the era of high-definition surveillance, the situation will change. High-definition surveillance is very cost-sensitive. Although the overall image quality of CMOS sensors is not as good as that of CCDs, its cost advantage poses a great threat to CCDs. Of course, the outcome of the game between the two will ultimately be determined by the price-performance ratio, whoever can guarantee better image quality and won't be expensive.

Judging from the current trend, the chance of CMOS winning is significantly greater. On the one hand, with the development of technology, the sensitivity of CMOS is rapidly improving. It is reported that manufacturers dedicated to CMOS research on the market have developed 720p and 1080p dedicated CMOS devices with sensitivity performance close to that of CCD. On the other hand, although the resolution of the CCD sensor of the same size is better than that of the CMOS sensor, if the size limit is not taken into account, the advantage of CMOS in terms of volume rate can effectively overcome the difficulty of manufacturing large-sized photosensitive originals, so that CMOS is at a higher resolution Will have more advantages. In addition, CMOS response speed is faster than CCD, so it is more suitable for the large data volume characteristics of high-definition monitoring.

Therefore, although CCD and CMOS have their own advantages in different application scenarios, with the continuous improvement of CMOS technology and technology, and the continuous decline of high-end CMOS prices, high-definition network cameras will choose CMOS more in the future.