First, the principle of audio and video matrix switcher: Led Screen Control System,Led Screen Billboards,Rental Led Display,Smd Led Display Guangzhou Cheng Wen Photoelectric Technology Co., Ltd. , https://www.cwledwall.com
The audio and video matrix switcher is specially designed to switch and distribute video signals and audio signals (unbalanced stereo audio signals), and can switch multiple signals from the input channel to any channel in the output channel, and output channels Independent of each other. Department products promise to visually and audio asynchronously control.
Audio and video matrix switcher with power-off field protection, field reverse-switching, etc., with RS-232 communication interface for online use, infrared control, network control; audio and video matrix switcher uses new LED panel display and light The touch buttons ensure that the status display is more intuitive, more reasonable, and easier to operate.
Second, audio and video matrix switcher interface:
Usually it is a pair of white audio interface and yellow video interface. It is usually connected by RCA (commonly known as lotus head). It only needs to connect the scale audio and video cable with lotus head to the corresponding interface. The audio and video interface enables separate transmission of audio and video, which avoids the degradation of image quality due to audio/video mixing interference, but because the audio and video interface still transmits a video of luminance (Y/C) mix. The signal still needs the display device to perform bright/color separation and chrominance decoding to image. This process of mixing and then separating will inevitably cause loss of color signal, and the chrominance signal and the luminance signal will have a great chance to each other. Interference thus affects the image quality of the ultimate output. Audio and video also have a certain vitality, but because of its insurmountable shortcomings of Y/C mixing, it cannot be used in some places where visual limits are pursued.
Third, audio and video matrix switcher features:
1, using the latest ARM9 embedded processor;
2, using 300M high-bandwidth professional chip to support the bandwidth of high-definition television (HDTV);
3, using signal long interval transmission distortion gain compensation technology, can support 300 meters interval;
4, using professional audio op amp post-processing chip, so that the tone is mellow and round;
5, using a blue LCD LCD display, all Chinese display working status;
6, using programmable logic circuit (FPGA), the function is not chaotic;
7, full patch SMD process, unique ESD static protection function;
8. The audio and video input and output terminals adopt the CRA interface;
9, N channel video signal input; N channel video signal output, can be completely cross-switched;
10, N-channel stereo audio signal output, N-channel stereo audio signal output; can be completely cross-switched with video synchronous or asynchronous;
11, built-in round-robin switching function, can set the distance time and channel arbitrarily;
12, built-in 8 sets of scene storage functions, can be directly manipulated in the panel;
13. Compatible with the code and instructions of all similar products in the market;
14. Switch the memory protection function on the power off site;
Fourth, audio and video matrix switcher control mode:
1. Button control: directly switch through the panel buttons to display the running status;
2. Infrared remote control: use infrared remote control to switch remotely;
3, matrix management software: the special matrix management soft (MCONSW1.0) software control system control system of Ming Control Technology, the connection interface can use RS232 interface or TCP / IP interface (optional);
4, touch screen control and panel: use Minghua technology programmable touch screen (MCON-TCH880) or panel MCON-OPP2000) to connect plug and play;
5, central control: can control the series of products in the technology control and other companies in the control and switching;
Fifth, the scope of use:
Audio and video matrix switcher series audio and video switcher is a high-performance intelligent matrix switch device, which is used to switch each audio and video synchronously or asynchronously to any channel in the output channel. This series of products is widely used in large-screen projection display engineering. , electrification professors, command and control central, multimedia conference rooms, etc.;
Six main technical indicators:
1. Audio department:
Frequency response: 20Hz ~ 20kHz +1/-3dB
Stereo channel isolation: >80dB@1kHz
Common state ratio: >75dB@20Hz-20KHz
Gain error: ±0.1dB
2. Video department:
I/O impedance: 75Ω
Full support for NTSC, PAL, SECAM, HDTV various audio and video display signals.