V Groove Ball Bearing V Groove Ball Bearing,V Groove Track Bearing,V Groove Roller Bearing,V Groove Mini Bearing Hebei Naimei Bearing Co., Ltd. , https://www.nmn-bearing.com
First, see through "coaxial HD"
In essence, coaxial HD is an analog signal transmission technology whose core technology is to use transmission chips (TX transmit chip and RX receive chip) to increase the data transmission distance. The fact that HDCVI, HDTVI, and AHD, both of which belong to the same coaxial high-definition, are not much different from each other. The main difference lies in the difference in product transmission chips and the differentiation in product performance. Look at market positioning from the perspective of coaxial high-definition technology.
The first is "simple." The installation, configuration, operation, and maintenance of the coaxial high-definition system are exactly the same as those of the analog system, and they all follow the habit of the analog system. This is a great advantage for traditional engineering companies and integrators. It does not take more time to learn to adapt to IP systems, and it does not need to spend more manpower and material resources in system design and implementation. At the same time, in the high-definition transformation of the old analog system, the coaxial high-definition can make full use of the original analog transmission lines, only need to replace the front-end camera and the back-end coding equipment, without rewiring, green environmental protection. This is actually one of the core advantages of coaxial high-definition: high-cost transformation of low-cost old analog systems.
Followed by "real time". The coaxial high-definition system maintains the real-time performance of the analog system, from image acquisition to output, without coding, thus ensuring that the image has good real-time performance. "High-definition real-time" can be used as a highlight, which has played a icing on the cake, but its demand is still too small compared to the high degree of flexibility and scalability of IP HD.
The last is "extra distance." The biggest feature of coaxial HD is the ultra-long-distance transmission of high-definition image point-to-point. You can enjoy farther transmission distance (300 meters or even 500 meters) than previous products. The transmission distance is extended for the general monitoring "small system" (can be understood as: The point-less, low-cost-input system is a great convenience, reducing system transmission costs. Compared to digital HD HD-SDI, which uses coaxial cable transmission, the current widespread coaxial high-definition technology uses low-frequency signal transmission to provide reliable anti-jamming performance, which can effectively avoid daily interference caused by mobile phones and routers. The coaxial HD transmission distance is even more incomparable with digital HD.
Look at product development from the cost of coaxial HD systems.
In the homogenization of products today, the cost of front-end and back-end equipment is not much different; the development of image coding technology makes the cost of storage almost the same. Look at the core construction wiring problem. The coaxial high-definition adopts the transmission of the coaxial cable, it is higher to require the wiring of the project construction, need to open the slot and wear the pipe, the farther the transmission distance is, the more expensive the engineering cost is. Compared with IP high-definition, due to the current popularity of the network, most venues generally consider network coverage at the beginning of construction. Therefore, network video surveillance equipment products can basically achieve access to the nearest site and reduce transmission costs. But what if the system's transmission line is already built? Obviously, coaxial HD has its natural advantages in the built-in simulation system.
Second, the small system is in full swing, and the big system is difficult
As we all know, there are two main HD market, the new HD system and the transformation of the old analog SD system. From the advantages of coaxial high-definition, we can find that the core market of coaxial high-definition still lies in the high-definition transformation of the old analog system (because the initial investment in the security monitoring system is basically an analog system, so the market for this piece is very large), and there is The new "small system" market, and its core users are "old" traditional security engineers, integrators. This also verifies why coaxial HD is so active in the channel microsystem market.
With the advent of the network age, the main advantages of coaxial HD are transmitted over long distances. Relatively speaking, it is only beneficial to the high-definition reconstruction of old analog systems. For new security systems, when the number of system access paths exceeds a certain number, Its point-to-point long coaxial cable transmission costs are too high. In addition, coaxial high-definition is always an analog signal transmission technology, and the inherent problems of analog surveillance systems also exist in coaxial HD. such as:
Image clarity. IP high-definition can achieve front-end camera encoding, lossless transmission, better image quality; and image quality depends on the transmission distance, that is, the longer the transmission distance, the worse the image quality. Similarly, the IP high-definition signal is not affected by the transmission distance, and the definition has also been developed from the mainstream 720p, 1080p image effects to 3 million pixels, 5 million pixels, and even 4K high-definition, the definition can be unlimited development; and the coaxial high-definition Technical limitations, while increasing the resolution, will reduce the transmission distance. Therefore, the current coaxial HD is generally to achieve 1080p real-time, higher resolution will have to balance the definition and transmission distance.
Transmission problems. Coaxial HD has certain requirements for transmission media, especially after the aging of the transmission line, it will bring a series of product image problems, such as water ripple, screen jitter and so on. At the same time, coaxial high-definition can not have IP high-definition wireless transmission technology, more and more tend to civilian use in video surveillance systems today, wireless transmission becomes more and more important, and from wireless to 3G to 4G, the development of faster and faster .
Insufficient scalability. The coaxial high-definition system cannot increase the number of access channels through the upgrade of the software on the basis of the original system, while the IP high-definition system can increase the number of access IPC by improving the coding performance, and even can use a switch and other devices to perform multi-drop levels. Alliance, saving wiring costs.
The system is relatively closed. The video surveillance system has come to present a development trend of “openness and intelligence†today, but coaxial high-definition seems to run counter to it, and the system can only be compatible with corresponding technologies. For example, the HDCVI product, which is one of the coaxial high-definition products, is only compatible with HDCVI's own products. The system is too closed and the compatibility is poor. IP high-definition is developing better with features such as openness and intelligence.
The limitations of the system also directly led to the incompatibility of high-definition coaxial systems in large-scale system integration. However, we are pleased to find that: At present, coaxial high-definition chip makers are increasing investment in higher R&D, and mainstream security monitoring companies are also constantly improving the expansion performance of coaxial HD products. Take Hikvision HDTVI as an example. At present, HDTVIDVR supports analog CVBS, high-definition HDTVI and high-definition IPC access. From the standpoint of coaxial high-definition market performance, its largest shipment is also in the group of small-scale system customers, because the small-scale system requirements are simple and easy to operate. Recently, there are rumors that the technology of digital HD-SDI and HDTVI can be mixed to support 2K and 4K resolutions, and the quality of coaxial high-definition video can be further advanced on the coaxial transmission.
Third, market promotion
HDCVI, HDTVI and AHD, since they belong to the same high-definition, must be promoted by the majority of manufacturers and end customers. Judging from the current market performance, the gaps between HDCVI, HDTVI, and AHD are not large, so it is difficult to say who is more competitive in the market. Which product is more popular? So far, there is no authoritative statistical report showing accurate acceptance, but there are still some differences in the way these three programs are promoted in the market.
Since HDCVI entered the coaxial high-definition market earlier, its concept has become more entrenched. First, it has a first-mover advantage when entering the market, and latecomers have a hard time catching up. However, HDCVI does not show great market influence. The reason is that the system is too closed and the core chip of the product is monopolized by the manufacturer. The price of HDCVI products is set lower, and the price of HDCVI chips is set higher. Many people have scruples about their monopoly, so they are not willing to accept HDCVI.
AHD is currently no leading enterprise flag, so it can only fight prices. This is also the reason why AHD is currently more popular in the Shenzhen security market, because the manufacturers here are more sensitive to prices. AHD is the cheapest of the three solutions, but its image quality and system compatibility have yet to be further improved. Of course, in the market operation, it took full advantage of HDCVI's early indoctrination of the concept of coaxial high-definition. AHD's price tag is very good, and it is closer to the slogan of "simulated price, high-definition quality."
HDTVI is the best coaxial high-definition product for image effects and seems to be more attractive to end-users, but due to entering the market later, market awareness is lagging behind. However, the image quality of HDTVI is inherently dominant, and it has also won the recognition of many users. Market reputation has been further established. At the same time, HDTVI technology has begun to spread across the security market and the system is more open to HDCVI.
Looking at overseas markets again, coaxial HD seems to be more easily accepted by overseas markets. The reason for this is that the coaxial HD has features such as simple operation, real-time image, and long-distance transmission, which are more in line with the needs of the construction of small-scale systems. However, there is a general demand for small-scale system construction in overseas markets, and the system requires lower-cost investment. Simpler construction operations.
Therefore, the high-definition coaxial HD in overseas markets is precisely because of its characteristics. Therefore, in the future, HDDVI, HDCVI, and AHD will form the three-dimensional market structure in the coaxial high-definition market. Of course, changes in the market are changing rapidly. The way of coordinating the high-definition road depends on the ultimate needs of customers and the company’s guidance on market demand. . (Text / Yao Jing Hangzhou Hikvision Digital Technology Co., Ltd. Product Presales Manager)
V Groove Ball Bearing(v groove bearings)- Hebei Naimei Bearing Co., Ltd specilized in V type Groove Ball Bearings , Bearings including Metric & Inch Series Miniature Ball Bearings, it is widely used in industrial robot, cutting equipment, mobile guide rail, production lines, etc.
Looking at a group of data, in 2014, the market share of HD surveillance has reached 55%, surpassing that of analog cameras accounting for 35%, while digital HD cameras are called transition products, and its share is also close to 20%. There are experts. It is predicted that the new monitoring system will be implemented in 2017 to achieve full HD in a true sense. HD has become the first choice for the public at the moment. When it comes to high-definition, the most typical representatives are: IP high-definition, digital high-definition (HD-SDI) and coaxial HD. IP high-definition has become the trend of security video surveillance, which occupies the majority share; HD-SDI has become a choice of many high-demand user groups with no delay in image quality and loss of image quality. It has a small piece of cake in the HD market; Coaxial HD, also known as analog HD, is one of the typical high-definition technology representatives. The main factions are HDTVI, HDCVI and AHD.