wholesale audio video surveillance equipment manufacturer,factory,exporter,supplier

The success of a movie or TV series is inseparable from the director. They always sit behind the monitor and grasp the rhythm of the entire set. This puts higher demands on the audio video surveillance equipment. It must be real-time, high-definition, etc. As a wholesale audio video surveillance equipment manufacturer, factory, exporter, supplier, today, we mainly introduce it to you.

The director monitor is an indispensable part of the monitoring system in addition to the camera. You can see the picture and effect of the camera when it is shot through the monitor. Through continuous guidance and adjustment, the picture can achieve better results.

The role of audio video surveillance equipment

The monitor is a component of the closed-circuit monitoring system (cctv), the display part of the monitoring system, and the standard output of the monitoring system. Only with the display of the monitor can we watch the image sent from the front end. As an indispensable terminal device for video surveillance, it acts as the “eyes” of the surveillance personnel and also plays a key role in the aftermath of the investigation. The main function of the monitor is to display the monitoring screen. Monitors are required for monitoring, medical treatment, and film and television production. They are used in different places and the monitors are different. The monitors for film and television production are generally more expensive and can be used for pre-shooting as a preview, and Output monitoring effect in the later stage.

The main features of audio video surveillance equipment

Different from ordinary monitors, the color effect of monitors is more accurate than that of monitors. This function is mainly used for film and television production. If you only use monitors to make films, you can’t see the effects of the films. The interface of monitors is generally richer than that of monitors. So in the early stage of shooting, the director will also use a monitor, through the monitor you can see the picture and effect of the camera when shooting. Key points for monitor selection:

• The type of monitor should match the type of camera;

• The definition of the monitor should be slightly higher than that of the camera in the system;

• Monitor with 23-51cm screen should be adopted;

Factors to consider when choosing an audio video surveillance equipment

🔹Color gamut

Color gamut is a method of encoding a color, and also refers to the sum of colors that a technical system can produce. In fact, to put it simply, color gamut is color expressiveness. Due to the influence of different factors, different types of monitors produced by different monitor manufacturers have different color gamut coverage, so the display effects are also different.

🔹ΔE

△E is used to standardize what kind of error value is acceptable within people's perception. The color difference between the original color gamut of the monitor and the target color gamut (refers to the difference between one color and another color), we define it as the color deviation degree, represented by the symbol △E.

• The measured value of △E is between 1.6 and 3.2, the human eye basically cannot distinguish the difference in color, and it is usually regarded as the same color;

• The measured value of △E is between 3.2 ~ 6.5. Most people feel that the color is the same, but people with professional training can distinguish the difference. The difference in color can be seen, but the impression of the color is basically the same.

In practice, only monitors with an average value within △E3 can be used for technical-level monitors. Professional monitors with an average index greater than △E5 require color correction.

To put it simply, the smaller the △E value, the more accurate the monitor color; the larger the value, the greater the deviation.

🔹Pixel

For monitors, the higher the pixels, the better. The same is 800x480 pixels, displayed on a 5" screen, the image will look very delicate. But if it is displayed on a 7" monitor, the image quality is slightly grainy. Because in the case of a certain pixel, the larger the display size, the larger the pixel-to-pixel distance, and the less clear the image. This is like painting on silk and linen, and the effect is completely different. Therefore, when conditions permit, try to choose a monitor with high pixels, which is conducive to observing the level and details of the picture, especially when only a small-sized monitor can be used to monitor the image, it is particularly important.

🔹Interface 

Before choosing a monitor, whether it is professional or entry-level, the first thing to consider is the signal format, and then the function. According to your own equipment, choose the appropriate model. If your device only has HDMI signal output, then don't choose a monitor with HD-SDI signal at the same time, unless you have a later upgrade plan or it is really not bad for money. Since small-sized monitors are mostly used for mobile shooting, if the device used is HDMI signal output, when choosing a monitor, it is necessary to consider whether the monitor has the HDMI terminal locking function to ensure good signal contact.

At present, there are many interfaces involved in monitors, and the commonly used ones are mainly DVI, HDMI, SDI, etc.

🔹Function

According to different purposes, choose different functions.

Taking movie shooting as an example, the camera monitor is generally used by photographers and focus followers. The photographer pays attention to the composition, and the focus member pays attention to the focus. Before shooting, photographers habitually check the exposure, which requires a brightness waveform function. One of its functions is equivalent to viewing the zebra pattern from the viewfinder. The brightness waveform is displayed on the monitor and is dynamic. Compared with the zebra pattern, the prompt effect is more precise and intuitive.