Wednesday, January 5, 2011
【 Weak current College 】 how to choose the right video conferencing camera 】
The camera as a digital video equipment, widely used in video conferencing, and other aspects, with video conferencing, the camera also gradually get a number of personal and business users of all ages. But because the camera brand, product performance is uneven, so how to choose a good camera into a video conference using the results of a key factor. Choose a good camera to focus on the following parameters: first, lens
The lens is an important part of the camera, the camera's sensor components can be divided into CCD and CMOS. CCD (Charge Coupled Device, charge-coupled components) is applied to the photography of high-end technology components, CMOS (Complementary metal oxide Semiconductor, Metal-Oxide semiconductor components) is applied to a lower image quality products, it has the advantage of relatively low manufacturing cost, power consumption and CCD is considerably lower, that is marketplace many using the USB interface, no external power supply of the product. The current size of the CCD elements for 1/3 inch or 1/4 inches, in the same resolution, the select element size bigger as well. Due to the analog camera video stream effects compared with CCD camera great gaps exist and, therefore, not just for the sake of cheap select analog camera.
Pixel values is an important indicator of the camera quality is also good and bad of it quite important. Early product pixel values generally 10 million, is not high technology content, its now to be eliminated. Now the mainstream products which pixel values are generally at around 35 million. Just consider the pixel value is unnecessary. Because the pixel value, the higher the resolution of product images capability is stronger, so that the work carried out in the camera, computer data processing capacity requirements are higher, this will cause a delay in the screen, thus affecting the transmission of the video conference. III. resolution
Resolution is the camera's ability to identify the image resolution. Of course, and CCD/CMOS is good or bad is directly related. Generally can be divided into photographic resolution and the video resolution, which is a static screen capture resolution and dynamic screen capture resolution. In the video conferencing application, is generally higher than photographic resolution video resolution. Available camera can give you the kind of resolution is not the same, so when you buy should note that some resolution of identity refers to these products utilize the software can achieve the interpolated resolution, and hardware resolution compared to or with a gap.
IV. transfer speed
Webcam video capture capability is one of the core functions of the camera. Current webcam video capture are achieved by software, and thus the CPU processing power requirements are higher, because on the screen and capture capacity is directly proportional to the. Now the camera captures the picture in general the maximum resolution of 640 × 480, in this resolution, no camera can reach 30 fps capture effects, which will generate bouncing phenomenon of the screen. More realistic is 320 × 240 resolution depends on the combination of hardware and software is likely to achieve the standard rate of capture, index, so for the full video capture speed, is only a theory. Therefore the user should be according to their needs, selecting the right products to achieve the desired results for video conferencing. 5. interface
High data volume, not the USB interface is not capable of. USB port on the product has always been to plug, easy to use and ready to accept the General computer users. Using the USB interface, not only makes the camera hardware testing, installation easier, more because of high USB data transfer speed determines the application of the camera, which breaking the image file is a large amount of data transfer bottleneck, allows the computer to receive data more quickly to dynamicimaging of broadcast more smooth, and smooth.