Shaanxi manufacturers offer HD kind Showcase

How to choose a suitable digital video showcase product you are using is a problem faced by every user, in fact, as long as the attention to the following several points, you can ensure that you choose to desirable products: 1. Resolution selection: In fact, Digital Video Showcase in the country's development, but not initially SXGA XGA resolution products, but because of its expensive and smearing serious, and there is no auto-focus function, did not get user acceptance; on the contrary when abroad manufacturers soon realized that the above problems, the timely introduction of a resolution of XGA products, because of its good price, quickly recognized by the majority of users, digital video Showcase in just one year has been rapid 2. The product development function selection: in fact the most basic function video Showcase is a two-dimensional or three-dimensional object photoelectric conversion signal and transmit them to external devices such as projectors demonstrate to the audience, then the images and text to restore basic ability is the most important form of expression. This is like the right time is an indication of the watch with the same basic skills. However, in the actual procurement process is often easy to overlook the basic product performance, and confused on the product too much additional functionality, this choice as we bought a watch function but many can not go correctly, like so people feel, worry. The most expensive product, the most complete product is not the best, the most suitable product you need is the best. Here is a simple example, such as auto-focus feature, currently about 3,000 domestic product and almost all of it as a necessary function, but the strange thing is some import figures stand products, not even the basic autofocus functions are not, but also tell the user electric is automatic, people really surprised, just as for most non-professional users, is almost impossible to bear no auto-focus function as a camera. 3. simplicity and ease of operation: the machine is to serve, so it was easy to use the device is particularly important. For example, we usually use the paper to A4 and B5 in two sizes, mainly in our original use, the need to continue to zoom in or out of the camera shooting range to meet the actual needs, to bring users no convenience, but also waste a lot of valuable time. Then with one-touch operation of format presets, then to bring users a great convenience, with just a touch button, you can adjust to your preset standard format or size, which is scientific and technological progress with to the so-called human design, indeed takes into account the real needs of users, similar to the functions of the above is what we need at the time of purchase should be noted that the comparison. 4. Performance comprehensive evaluation: Do not trust technical parameters, in a non-regulated market environment, or more believe your eyes; can be used under the same conditions, the full uniform of a comprehensive comparison of the booth lighting, lenses uniformity, color and text performance capabilities and pincushion distortion, etc., in order to achieve a real choice for the purpose of your product. The ratio of noise voltage amplifier and the output signal voltage while the output of the amplifier is the signal to noise ratio, referred to as the signal to noise ratio. Typically English character S / N to indicate, S represents the camera image signal value at the time of assuming no noise, N represents the noise value from the camera itself (such as thermal noise) ratio of the two is the signal to noise ratio in decibels ( dB) representation. The higher the better signal to noise ratio, the greater the signal to noise ratio, then mixed signals in the less clutter, the video quality is higher. On the contrary, it is worse. Showcase is generally typical 46dB.