A character superimposer is an electronic device capable of superimposing text or graphic information on a video signal, and it has a wide range of application fields and practical use cases. This article gives you a detailed introduction to the principle, functions, application fields, and actual use cases of the character overlay, so that you can understand the charm and value of the video character overlay technology. If you want to learn more about character overlays, welcome to read this article.

All we need is a digital to analog audio converter. This is a small, usually inexpensive and readily available device that converts a digital audio signal to an analog audio signal. Its principle is to decode and convert digital audio signals to output analog audio signals, so that our traditional speakers can play normally.

There are many types of USB extenders. This article mainly introduces two common USB extenders: USB fiber optic extender (here takes eKL-UF01 as an example) and USB single network cable extender (here takes eKL-HUE as an example), and analyzes them The differences, advantages and disadvantages and application fields.

Conventional HDMI fiber optic extenders generally only extend the HDMI signal to a certain distance through optical fiber, and have no other functions. Some of them support 3.5mm audio transmission together, or convert HDMI audio to 3.5mm audio output at the receiving end; while HDMI KVM The fiber optic extender is integrated with the USB function. Connect the keyboard and mouse at the receiving end, and the headset and monitor can remotely control the computer. The experience is the same as that of the host in real life, but the resolution and refresh rate may not be as high as the local one.

VGA switch with 3.5mm audio is a practical multi-input, single-output device, suitable for various scenarios such as office, education and training, and home entertainment. Although it has some limitations in video quality and audio transmission, it still has good cost performance and convenience in specific applications.

The choice of DP to HDMI cable should be weighed according to your own equipment and needs, and don't blindly follow the trend. This article introduces the principles, differences, application fields and application solutions of active and passive DP to HDMI cables in detail.