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Million HD Network Camera Definition:
HD network cameras are network cameras that can capture more than 720P (1280*720) of video at a resolution greater than 12FPS, and even reach or exceed 1080P (1920x1080). When meeting the 720P standard defined in the HD definition above, it can be understood as a megapixel level, so we also call the HD network camera a megapixel network camera.
Million HD Network Features:
Supports 2 H.264 streams at the same time, 1 MJPEG stream, suitable for local, Internet and cross-platform access;
-Using CMOS sensor, support 720P (1280*720), 640*360, 320*180 real-time video coding; NVH-583MW high-definition network camera - external microphone or pickup, remote monitoring of live sound; can also be external speakers, remote transmission of sound To the scene, to achieve two-way intercom function, support for echo suppression;
- Support 802.11b/g/n protocol, built-in wifi module, flexible set up wireless monitoring environment;
-Maximum support for 32GSD card storage for alarm photo recording and alarm recording;
- Supports four-area mobile frame measurement and an external alarm detector to achieve full-field deployment;
- Built-in WEB server, using a port to transfer all data, user-friendly network settings;
- Support for viewing device videos on various browser types such as IE, Firefox, Safari, etc.
- Use some smartphones to watch the video screen;
- The manufacturer assigns a vendor domain name for each device. After the device is connected to the public network, the device can be accessed using the domain name.
- Manufacturers provide free client software, providing multi-screen viewing, long time recording, video playback and other functions.
Product advantages:
1, using megapixel sensor, can obtain more video information, generally up to 1280 × 1024, 1392 × 1024, 1628 × 1236 or even 2048 × 1536 resolution;
2, the image display quality is higher, to better capture details;
3, progressive scanning CCD/COMS dynamic picture performance is more smooth;
4, can support HDTV widescreen output mode (16:9);
5, wider coverage, the same surveillance area can replace the original multiple fixed-point cameras and an omnidirectional camera.
The resolution of the camera depends on the performance of the Sensor. Compared with the CMOS sensor, the CCD sensor is superior to COMS in terms of sensitivity, resolution, noise control, high-quality image output, and dynamic image performance, so most of the professional The camcorder still chooses CCD as the light sensor, and the high-end megapixel network camera adopts Sony's most advanced ICX series light sensor with ultra-low sensitivity illumination to obtain clearer images in a dark environment, which cannot be achieved by ordinary cameras.
Procurement using millions of HD surveillance cameras Note:
Lens selection: In the video surveillance system, the lens selection of the megapixel HD network camera is also very important. There are various types of security surveillance cameras, and the specifications are also dazzling. It is very important to select a suitable lens in the surveillance project. The following factors should be noted:
(1) Avoid fakes when purchasing.
(2) Matching with the camera, especially the matching of the flux F value, so that the camera sensitivity can achieve the desired effect.
(3) Megapixel cameras generally have to purchase matching megapixel lenses.
(4) Look at the appearance of the material, whether it is matched with the CMOS/CCD specifications and interfaces, see if the coating is good, look at the lens type (spherical/aspherical).
(5) The application environment considers that the lens type involves selection of a wide-angle lens, a standard lens, a telephoto lens, a zoom lens, and a fixed-focus lens.
(6) Lens warranty time.
(7) Test the lens quality yourself.
When purchasing a million HD video camera, it is necessary to pay attention to several points: exactly understand the actual bandwidth, transmission rate and other quantitative indicators under high-quality images, and make a scientific assessment of the project's network resources; use CCD or COMS sensor chip? If the CCD chip solution, what kind of (single-channel/multi-channel) "output balance" technology is used, does the frame rate meet the actual needs; the cooperation of the optical lens must be matched with the use of an industrial-grade one million lens or the HD of the camera cannot be reflected. Quality advantages.
The choice of millions of high-definition cameras depends on your specific needs, from the choice of irradiation to the distance, the choice of different environments. Different uses, etc. need to be considered. If only considering the price/performance ratio, consider the following parameters:
First, look at the size of the sensor (the bigger the more expensive, the mainstream has 1/2.7, 1/3, 1/3.2, 1/4, etc.)
Second, look at the solution used by the processing chip (different solutions, the price is not the same, of course, the image processing is also different, the heat is also different)
Third, the comparison of the minimum illumination (determine the camera's sensitivity to light)
Fourth, SNR (determination of picture quality)
Fifth, does it have a wide dynamic effect (need to consider when indoors or outdoors)
In the general security monitoring system installation, the installation and debugging methods of millions of high-definition network cameras and standard definition network cameras are basically the same, but we must pay attention to good lens matching, because the quality of the lens is not good, or the matching is not good, very large To a certain extent will affect the clarity of the picture, for example, infrared night vision system camera is best to use infrared lens, and 1/3 inch CCD is generally equipped with 1/3 inch lens, 1/2 inch CCD is generally equipped with 1/2 In the inch lens, the focusing adjustment of the lens must be adjusted during installation and debugging. Especially the rear focal plane of the camera must be adjusted. In many cases, the unclear focus of the lens will cause the image to be blurred, which cannot reach the high definition requirements. In addition, the protective cover of the network camera can not be ignored, the front glass of the gun-type protective cover can not use the general flat glass, but must use better optical glass, the general flat glass has a very powerful weakening effect on the resolution of the image, The use of spherical shell should pay more attention to the curvature of the spherical surface must be smooth transition, it is best not to point the lens at the upper edge of the spherical shell, where the refractive power of light is greater, and even seriously affect the clarity of the image. It is important to note that no matter what type of housing, the light in the housing should be as low as possible, and the distance from the lens to the housing should be as short as possible. This can minimize the light pollution in front of the lens and improve the image. The clarity.
From the perspective of real product and system configuration, megapixel-class high-definition applications are basically formed, such as front-end million-megapixel high-definition camera, transmission, interface, encoding, image processing applications, output, display and other aspects of product technology, and application systems. The platform, based on the analysis of this topic, basically has the basis for operation. Although everyone in the industry generally believes that high-definition monitoring is an inevitable trend in the development of the industry and the market, from the perspective of real market applications, users of various industries currently have no concrete practical psychological preparation.
According to the information currently known, at present, in some core cities, many surveillance systems projects will use millions of HD cameras developed by the company. With the increase of these application cases, users will be more and more. Perceived different image effects and detail display capabilities of high-definition surveillance systems. And promoted by the demonstration effect of sample cases, attracting more high-end users who have high-definition image requirements to join the application camp, especially those who have good local area network or optical fiber resources, they want to start the application of network high-definition systems, It is easier. From the user's psychology, they are the first to care about the clarity of the image. However, they are also worried that in the past, we have used a digital-analog system, everyone feels mature and stable, and the operation is also handy. If you go to a megapixel high-definition system, how about stability? Is it convenient to use? When something goes wrong Is it easy to deal with it, or is it necessary for engineering integrators to help with the processing? Therefore, the sample engineering application case is the best way to get rid of such users' concerns, and the sample project also helps manufacturers and engineering integrators to find and solve specific applications. Problems in the process, thus promoting the further improvement of products and systems.
Million HD Network Surveillance Cameras Explain in detail
In the 2010 HDD year, the industry changed, and it was a golden opportunity. Million HD has ushered in explosive growth. Whether it is high-end government projects or civil monitoring, millions of high-definition surveillance have been rapidly popularized, affecting almost all security companies and individuals. development of. Today, whether it is from the technical point of view or market demand, the timing of millions of HD monitoring has matured. In terms of technology, a small number of domestic companies represented by the company have already solved the problems from the front-end camera to the back-end storage and network transmission, and achieved the functions of clear picture quality, low illumination, wide dynamics, etc., and the results are clearly superior to traditional ones. Analog cameras have a very high price/performance ratio. Secondly, from the customer's point of view, analog monitoring can no longer meet the market's high-definition, intelligent requirements, millions of high-definition monitoring has become the market's mainstream appeal point.