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VGA signal: VGA matrix switcher series is a high performance wideband intelligent matrix switcher specially designed for display switching of computer and video equipment display signals and high resolution VGA digital image signals. The input signal of the road is arbitrarily selected as one output or multiple outputs respectively to one display device, and one input signal can also be arbitrarily selected as one output or multiple outputs at the same time.
1. The information handled by the graphics card must be output to the monitor. The output interface of the graphics card is the bridge between the computer and the monitor. It is responsible for outputting the corresponding image signal to the monitor. Crt display due to the design of the cause of production, can only receive analog signal input, which requires the graphics card can input analog signal. The vga interface is the interface for outputting analog signals on the graphics card, and the vga (videographicsarray) interface, also called d-sub interface. Although the LCD can directly accept digital signals, many low-end products use the vga interface in order to match the vga interface card. The vga interface is a d-type interface with a total of 15 pins empty, divided into three rows, five in each row. The vga interface is the most common type of interface used on graphics cards, and most graphics cards come with such interfaces.
2. At present, most computers and external display devices are connected through an analog VGA interface. The computer internally displays information like a digital method. The digital/analog converter in the video card is changed to r, g, b. Signals with the line, the field synchronization signal, the signal is transmitted to the display device through the cable. For analog display devices, such as analog crt displays, the signals are sent directly to the corresponding disposal circuit, which drives the natural image of the kinescope. For digital display devices such as lcd, dlp, etc., a corresponding a/d (analog/digital) converter is required in the display device to change the analog signal to a digital signal. After the d/a and a/d2 conversions, some loss of detail was unavoidably caused. The use of VGA interface for crt displays is unquestionable, but for display devices such as LCDs, the loss of the conversion process can cause the display to drop slightly. The VGA matrix implements multiple VGA signal inputs and multiple signal outputs.
RGB signal: RGB matrix switcher series is a high-performance broadband intelligent matrix switcher specially designed for display switching of computer and video equipment display signals and high-resolution RGBHV digital image signals. The input signal of the road is arbitrarily selected as one output or multiple outputs respectively to one display device, and one input signal can also be arbitrarily selected as one output or multiple outputs at the same time.
1. The method of encoding a color is collectively referred to as "color space" or "color space." In the simplest terms, the "color space" of any color in the world can be defined as a fixed number or variable. Rgb (red, green, blue) is just one of many color spaces. With this encoding, each color can be represented by three variables - the intensity of red, green, and blue. When recording and displaying color images, rgb is the most common plan. However, it lacks good compatibility with early black and white display systems. Therefore, the practice widely adopted by multiple electronic appliance manufacturers is to convert rgb to yuv color, so as to maintain compatibility, and then need to change back to rgb format so as to display a color shape on a computer monitor. The rgb matrix converts vga signals into rgb signals to achieve matrix efficiency.
AV signal: AV matrix switcher series is a switching device that specifically switches and distributes video signals and audio signals (unbalanced stereo audio signals). The output can be assigned to any channel, and multiple channels of input audio and video signals can be arbitrarily selected. Multiple channels of audio and video are output to one channel, and one channel of input audio and video signals can also be arbitrarily selected for one channel of output or multiple channels of simultaneous output.
1, AV port (also known as composite port) original compositevideoconnector, is a common port used by home audio and video appliances to send analog video. The av port is usually a yellow rca port, in addition to two red and white rca ports to deliver messages. European televisions usually use scart ports instead of rca ports.
2, but the design of scart can carry better rgb signal quality than yuv, it is also used to connect the monitor, video game or dvd player. In professional use, there are also applications of bnc ports for better signal quality. Passed in the av port are three origins of the analog television signal: y, u, v, and the pulse signal as the synchronization reference. y represents the brightness of the image (luminescence, also known as brightness), and includes the sync pulse, and the black and white television image can be seen only if the y signal is present. The u- and v-signals carry a color material, and u and v are first mixed into two sets of orthogonal phases in a signal (this mixed signal is called a chrominance) and then added to the y signal. total. Since y is the fundamental signal and uv is mixed with the carrier, this summation action is equivalent to division multiplexing.
The power of the matrix switcher is to transfer one or more audio and video signals to one or more display equipments, so that we can classify the matrix switchers according to different signal sources. That is, the type of the matrix switcher is determined based on the signal to be divided. The matrix switcher can be classified according to the type of signal source: VGA, AV, VIDIO, DVI, HDMI matrix switchers, and the like. The VGA matrix switcher is a matrix switcher that inputs and outputs signals as VGA signals. Other types can be analogized. There are many varieties of matrix such as AV matrix, VGA matrix, RGB matrix, DVI matrix and so on. This series of products can be widely used in large-screen projection display engineering, multimedia teaching, lecture halls, military command and control centers, traffic monitoring, hotels, multimedia conference rooms, audio and video showrooms and other occasions.
Analysis matrix switcher classification and use
The matrix is ​​called the matrix switcher and is used to switch the input and output of various signals. The concept of matrix refers to the concept of linear algebra in high numbers, which generally refers to multi-channel output selection in the case of multiple inputs, forming the matrix structure of the following figure, and each output can be “shorted†with a different input signal. "Each output can only be connected to one input, but one input can (simultaneously) switch on different outputs. The following will focus on understanding the number of common signal sources. Matrix, to achieve multi-channel signal input, multi-channel signal output, you can switch any one output port to output any one input signal.
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Guangzhou Ming Control Intelligent Technology Co., Ltd. Technical Department
August 8, 2013