Six standard indicators examine HD camera performance

1. Examine the heat output The DSP used in the current high-definition digital camera has many options, such as: TI, Anba, Hass, Maxim, etc. Currently, TI's DaVinci DSP performs well, and its power consumption and heat are also high. Small, but it is difficult to develop, many domestic companies are trying to use TI's DSP development, mostly failure, and TI as an international company, and security is only a small piece of them, foreign language exchange is not convenient, technical services Not comparable to the domestic Hass, it is also less than security, so the manufacturers who turned over on TI have more choices Hass, Anba, if the manufacturers will not R & D, chip companies can help. Greatly reduced the difficulty of R & D manufacturers.

Ordinary mega-cameras are hot, mainly because of the large heat generated by the DSP, and it is inevitable that the stability is worrying. Especially at the hot sun in the hot summer sun, more worrying.

It is worth mentioning that the original bolt firing is very hot, if you continue to add infrared light in front of the bolt, it is not hot to heat it? At present, most of the millions of high-definition cameras are high-illumination, high-definition million cameras, not low illumination. Ordinary million HD cameras usually have a low illumination of 2-10 LUX. This camera not only has weak visible light, but also weak infrared light. So if you want to get an ordinary million HD camera made of infrared, the number of infrared lights is also several times more than the low-illuminance infrared machine, or the amplification of the current, so that the infrared light becomes brighter, but the life of the infrared light to do so Worrying.

Having said this, we will know that if you choose a million HD video camera, you must test the heat of the machine to understand what DSP they are using. How does the power consumption heat up? In addition, we may also understand why there are many million HD manufacturers, but there are very few manufacturers that can provide and sell millions of infrared HD cameras in bulk. The reason is this way.

2. As long as the inspection delay is a digital camera, there are different degrees of delay. The same 720P HD picture, some camera delay is only 0.1 seconds (such as wave particles)), and some are as high as 0.4 seconds, 0.7 seconds, deep If you know more, when it comes to this, the engineering contractor's friends may wonder why the same resolution has different delays. Because the digital camera needs to go through 3 processes, compress, transmit and decompress the display. If a manufacturer is completely dependent on a solution provider or lacks its own compression algorithm development capabilities and core underlying technology capabilities, it will lag behind others in image compression, network transmission, and decompression of software efficiency.

Having said that, I would like to remind the general engineering companies that delay is a very important parameter, otherwise it will be very troublesome in terms of PTZ control. In addition, the delay also reflects the development strength of a software and the stability of the product. If you think about it, if all the way to monitor video processing is so tired, how can you develop hundreds of thousands of digital HD monitors?

3, to investigate the low illumination Everyone should know that security industry monitoring and consumer digital cameras and traffic monitoring is not the same, it is impossible to keep flashing when the light is dark. Therefore, there is no low-lightness feature for millions of HD, and applications are extremely limited. When the light is dark, it becomes blind. Pixels are no use high. In particular, civilian monitoring has a higher requirement for low illumination and is even more complex than the monitoring environment of some high-end surveillance projects. Such as bank monitoring, 24-hour monitoring under strong lights, the conditions are very suitable.

4. Examining the trailing part This part was originally intended to be talked about with low illumination, and later thought about it because the trailing phenomenon is the most common malpractice of a million HD camcorder. Therefore, it is put forward for discussion separately. We have already discussed in the discussion above. The importance of low illumination, but some security manufacturers use electronic slow gates or frame accumulation in order to improve low illumination, this will definitely greatly enhance the effect of low illumination, but the drawbacks are also very obvious, when there are moving objects on the screen. At that time, you will find out how a person walks with a ghost (tail), which leads to the inability to clearly see the moving objects (cannot see the characteristics of the people in action), and the moving objects are vague. When the object is still, you can see clearly.

5, inspection infrared infrared camera, is not in the ordinary machine plus an infrared light it? Too simple. Haha, many people say this way, this argument seems to be a bit reasonable, is it really so simple? Do not! If it is so simple, why are there millions of HD IR cameras that can be sold on the market? ? In fact, infrared high-definition, in addition to those analysis principles I said in 1), there are many details to deal with.

6. Check the price A manufacturer can easily raise the price, but it is difficult to lower the price. It may be difficult for everyone to say. What is the difficulty in this? Yes, but what company have you seen in the price war? Can you get an analog camera for $30/support? No one, why? Because no one can control the cost so low, even cutting corners can reduce the cost by as much as 10%. Everyone thinks that the performance of computers and CPUs was poor and expensive. Why is the performance of computers and CPUs today still very cheap?

Remind everyone, don't forget the magical power of technology. Scientists and R&D engineers are not only constantly improving the quality of their products, but also constantly reducing the cost of the product. Otherwise, the priority technology products can only be used in small areas forever, or forever in trials. In the room, it is difficult to benefit humanity and benefit the society. You can lower the price and you may be able to cut corners, but if you can drop the price, it's a high technology. Of course, manufacturers will also be based on market positioning, the user rarely used the function, not on the ordinary machine, and put in high-end machines.