1. Overview
The CVBS video overlay controller developed by Ning Pengda Technology is a video signal processing and control product. Its main function is to process the input CVBS video signal so that the corresponding output CVBS video signal displays specific characters and graphics at designated positions on the screen, visually equivalent to "overlaying" characters and graphics onto the video image. In general applications, character and graphic overlays are primarily used for menu operations, logo display, numerical display, scale marking, or screen division. With the increasing variety of video products and the expansion of application fields, overlaying characters and graphics onto the original video image can enhance product functionality and improve user experience for many video products. Using this product to achieve the overlay function does not involve modifying the video signal source, video display hardware or software, or editing video content. Therefore, this product is not only suitable for the development of new products but can also be used for upgrading existing equipment. This product is meticulously crafted using the latest semiconductor devices combined with modern electronic assembly processes, offering advantages such as stable performance, compact size, and easy installation. The functionality of this product is realized by directly processing analog video signals. The video output signal is real-time synchronized with the video input signal. Additionally, the product employs special technology, giving it outstanding advantages compared to similar products on the market, including no damage to the input signal, no delay in output response, no flicker in overlay content, high signal processing precision, and the ability to achieve semi-transparent and automatic reverse effects. Furthermore, this product can also serve as a replacement for discontinued OSD chips such as MB90092, M35055, μPD6453, μPD6464A, MAX7456, MTV018, STV5730A, and LC74788. Compared to traditional OSD chips, this product offers richer overlay content, greater flexibility, lower customization thresholds, and higher cost-effectiveness, while also overcoming the limitations of traditional OSD chips, such as the inability to overlay full-screen continuous lines, extremely fine lines, and large-area graphics. This product can overlay various characters and graphics, and the overlay content, position, spacing, grayscale, display format, adjustment range, and other supporting functions can be customized according to customer requirements. The product is available in three forms for customers to choose from: component type, board type, and device type. All products are compatible with PAL and NTSC systems and suitable for various display ratios. The video interface, control interface, power interface, and related parameters can be customized based on the customer's specified video signal source, video display screen, actual application scenario, and functional requirements.

2. Applications
Security monitoring systems Industrial control equipment
Video optical instruments Medical imaging equipment
Remote mechanical control RC car and aircraft control
Gaming and entertainment devices Parking assistance systems
Production operation instructions Commercial advertising