Solution background introduction:
Multi-screen seamless splicing has a large display screen, ultra-high display resolution, and ultra-high-definition brightness. It is widely sought after in exhibitions, displays, and conferences. At present, the multi-screen seamless stitching systems on the market are mostly large-screen projection stitching systems using soft-edge fusion stitching technology. Multiple picture-in-pictures can be opened at any position on the screen. Using a local area network, the picture of an external computer can be displayed on the screen In the picture. Multi-screen seamless stitching breaks down a single VGA display signal into multiple signals to form a M * N multi-screen stitching to form a single logical screen. The mouse and application windows, active video windows, real-time VGA signal windows, etc. can roam, move, zoom, etc. in this logical screen. The large-screen splicing technology is generally used in large-scale command center systems and multi-party remote video conferences.
At present, most large-screen projection splicing systems on the market use different video capture cards to display external AV, VGA and other signals in the picture-in-picture of the screen. In order to meet the requirements of a variety of VGA display devices on the large screen, The computing power of the large-screen splicer alone cannot be met. This requires that the large-screen splicer can receive multiple signals and integrate display output on the large screen. The requirements for high-definition VGA capture cards are relatively high, such as 1920 * 1080, 2048 * 768 and so on. That is, a VGA capture card is required, which can not only capture high resolution, but also high speed and high frame number.
Scheme system architecture diagram:
In response to the needs of large-screen splicing professional users, Mayfield has launched a high-definition audio and video capture card based on the PCI-E 4X bus structure to meet the needs of large-screen users in collecting multiple signals. It can simultaneously capture 2 channels of HD video signals and 4 channels of SD Video signal, 2 analog two-channel audio signals, the picture is clear and saturated without drawing when synchronously collecting HD and SD signals. High-definition video supports DVI video, VGA video, Y / Pb / Pr video, HDMI audio and video, CVBS video and other signal sources. It can dynamically and automatically switch the input signal source type. A single card can achieve high-definition VGA signals, DVI signals, Real-time high-quality acquisition of HDMI audio and video signals, Y / Pb / Pr video, CVBS video, etc., can obtain full-resolution high-definition uncompressed video acquisition, ensuring that high-definition programs generated from high-definition material output completely retain the original image quality The maximum resolution of HD capture can reach 2048 × 1536. Compatible with various audio and video capture software using the DirectShow interface and audio capture software using the DirectSound interface, and supports third-party software developed by the standard DIRECT SHOW API, such as LEDShowT9 and LEDStudio8 LED large screen control software. It also supports multiple cards on one machine, which can be used together with other streaming media capture cards to meet the multi-channel capture requirements of various users.