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  • From innovation of key components to explore the network digital security

        Network security needs digitized advent of monitoring equipment to feel the brunt of key components of reform and change, this wave of innovation, basic components of the monitoring will have any effect? Will influence its future direction of product development do?
        When the client and product side, there have been reflected in the downstream demand, the most critical component upstream will set off a new wave of technologies and applications change. Next, let us from the photosensitive component (ImageSensor), digital signal processor (DSP / ISP) and the compression chip (Codec) to store each such component part of the study.
        Key components of the current status of the industry chain
        Head first key component of understanding the relationship between the security industry chain, as well as key components of the core relationship can start chain, product safety monitoring component technology to analyze the status of industry to dismantle the world, the Chinese mainland and Taiwan monitoring component industry chain.
        1 Upstream: security surveillance industry chain mainly Sensor sensing assembly, DSP / ISP image processing, optical lens dominated the majority of the manufacturers are lack of relevant components or technologies rely on Japan and South Korea imports.
        2 River: Most of the current global manufacturers and more focused in the middle, that surveillance camera, VCR monitor the manufacture, production and assembly. Stage major security vendors in China fortune in midstream, and achievements in the middle, for example Apexis electronics began to emerge, and gradually grow into independent research and development capabilities of the brand.
        3 Downstream: Most security vendors downstream sales channel of dealers or agents, but SI, engineering companies are the major security vendors sales channels.
        Application and development of key components
        In 2012 as a high-definition monitor outbreak years, "HD HD" and "IP" a well-deserved popular vocabulary. More and more vendors to join this field, the high-definition IP this cake bigger and bigger. Digital HD IP camera gradually recognized by customers. Digital security products, intelligent, high-definition and network become an irreversible trend, HD products on the market mushroomed show in front of the user. Currently HD IP solutions on the market after another, how to choose a suitable own IP HD component solution become very topical issue. HD IP camera assembly program has the following two basic architectures.
        ImageSensor image sensor chip components
        1 using CCD / CMOS sensor (SENSOR) as an image capture device, supporting the provision of ISP´s SoC chip, such programs have significant cost advantages, depending on imaging components integrated chip manufacturers ISP (such as 3A, wide dynamic range, etc.) effect; using this program a clear advantage is more flexible and can be customized according to program features, such as image capture, low number of sheets of control.
        (2) The second is the use of the sensor chip camera module as a front-end image acquisition device, and then supporting ASIC or DSP for encoding and transmission, the relatively high cost of such programs, the use of professional imaging module, the original image is good, so the entire IP camera products supporting the compression effect depends on transmission module is for compressed image clarity and timeliness.
        If you select a key component
        In addition to these two kinds of sensors with the way the framework, for security manufacturers, according to different market requirements and product positioning to choose its own product line with the direction of development solutions, equipment manufacturers to choose programs will consider the following points.
        Storage and bandwidth Level: image resolution enhancement is bound to consume more bandwidth and storage space. To 1920 × 1080 @ 30fps, for example, the use of the H.264 coding algorithm, in order to ensure clarity, stream around 6Mbps need to control, so the storage space needs hour 2.7GB. In normal LAN environment, 100M transmission bandwidth is only about 10 channels encoded image, even if the 1T hard drive can only store 400 hours. How to balance the storage memory and bandwidth is a problem.
        Lens HD performance: improved image resolution, the lens sophistication put forward new demands, the two megapixels or more network camera has a resolution of NTSC / PAL standard image ten times even more, while the average high-definition digital image machine DC or DV camcorder technology used on the high cost of high-definition network camera is not conducive to apply. Therefore, how to reduce the threshold of the imaging system, is the development of network and HD high-definition camera key component factors.
        3A control technology: In general analog camcorder, the manufacturers of the AF AFC, white balance AWB, AES, etc. 3A automatic exposure control techniques do more perfect, but these technologies in the digital high-definition camcorder HD or IP application is relatively weak, 3A control For the high-definition image quality is very important. The component, how to ensure the rapid completion time control algorithm is very important.
        High resolution even more advantages
        In the Sensor process, the current CMOS advantages make out, because the same level, the size of the light-sensitive chip, CMOS can put more than CCD pixels, more suitable for the development of high pixels. And because the CMOS to the pixel distribution in the same plane with the circuit, the circuit to take up most of the real effective photosensitive area of ​​less than 50%. Therefore industry is committed to narrowing the development process, so that the line size becomes smaller, the relative enhance effective photosensitive area; That is, the same light-sensitive component performance, CMOS chips using a smaller size can do. CMOS in the cost of materials is also advantageous because CMOS itself can transmit digital signals, you can save the cost of ADC chip, but also to avoid the distortion caused by signal conversion, depletion. There are industry integrated into a CMOS chip digital processing operations (DSP / ISP), graphical interfaces (UI) of some functions such as controller, but also save a lot of material procurement costs. So even single CCD and CMOS same price, but arrived in a multi-chip CMOS energy, cost is relatively higher.
        Low power consumption is king
        Compared to the same specifications as grade CCD, CMOS with low power consumption, small size advantage, not suitable for wiring, you must use a small camera battery.

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