Operating system: Windows 2000/WinXP/Win2003/Vista/Windows 7/Windows 2008.
Size: 106mm x 72mm,
Sampling frequency: 8/16/22.05/32/44.1khz.
Sampling accuracy: 24 bits
Signal to noise ratio: > = 85db
Number of channels: 2 channels
Interface type: PCI-E 1x interface.
Input channel: 2 CVBS videos, 1 VGA.
Video input format: WM9, True, MPEG4.
Video output format: supports DIRECT SHOW, and more supports RGB565, RGB24, RGB32, YUY2 and UYVY.
Video output interface: VGA, YUV422, RGB.
On-board memory: 256mb DDR 2/64bit/133MHz.
CVBS input standard: PAL/NTSC
The maximum format of CVBS acquisition: PAL: 720x576 25fps, UYVY color format; NTSC:720x480 30fps, UYVY color format
VGA acquisition format: RGB 16/24/32 YUY2
Maximum input bandwidth of VGA: 230MHz.
VGA scanning mode: Progressive scanning mode supports the development of standard DIRECT SHOW API.
Support direct display, driven by WDM standard.
The general DirectShow driver architecture is adopted.
High-performance DMA technology provides efficient superposition function.
Collecting uncompressed images of NTSC:720x480 30f does not occupy CPU resources.
Software development that fully supports Directshow architecture
Support single-machine multi-channel long-term operation
Support a variety of formats including: PAL and NTSC.
Brightness, contrast, chroma and grayscale can be adjusted in real time.
Support one card and four channels, and support 64-bit PCI-E.
High performance audio acquisition function, 256 MB/64-bit DDR2 memory chip
The VGA signal of 1920 x 1440 x60HZ can be acquired line by line, and the VGA signal acquisition card adopts PCI-E 1X interface. A single card can simultaneously collect 1 VGA signal, 2 video signals and 1 audio signal. The bandwidth is more than twice that of PCI interface. 256 MB/64-bit DDR2 memory chip is used as image cache, with a bandwidth of 2GB/s and an efficient main DMA mode. The image acquisition process does not occupy the CPU of the machine.
2.VGA signal acquisition card can automatically detect VGA resolution.
3. The VGA signal acquisition card collects1920x1440x60hz VGA signal line by line, and the resolution of the collected VGA signal can reach the effect of high definition line by line (1920x 1080p).
4. Efficient video acquisition capability, which can combine input signals at will. Recording and broadcasting software can support any 6-channel signal input, all video signal acquisition, editing and live broadcast software, and is compatible with mature computer hardware.
5.VGA signal acquisition card is a signal acquisition card with high compression ratio, high definition and stable quality. High-precision VGA signal acquisition card Audio and video VGA signal acquisition card has high definition, high quality, high compression ratio, high definition and stable quality.
6.VGA signal acquisition card has high-efficiency video signal acquisition ability, high-performance analog video front-end signal filtering processing ability and high-precision audio signal sampling ability, which improves the clarity of video and audio signal acquisition.
7. The display resolution of the audio and video VGA signal acquisition card is 1920x 1440, and it can collect VGA signals line by line, with the resolution of1920x1440x60hz (1920x/080p). 1, the picture size of the acquisition card can be scaled with high quality.
2. The signal acquisition card can automatically remove the VGA black edge.
3. Automatically detect VGA resolution. It can well adapt to the common 4:3 screen or widescreen display resolution and refresh rate, and can automatically adjust the picture to the clearest degree.
4, analog video deinterlacing function VGA signal acquisition card firmware can be upgraded.
5. High-precision signal acquisition card is more suitable for high-precision and high-speed moving image acquisition and processing; The resolution of image acquisition can reach 1920 x 1440.
6. High-precision VGA signal acquisition card can collect images of single field, single frame, arbitrary interval and continuous frame in real time;
7.VGA image/signal acquisition card can connect two channels of CVBS video, 1 VGA signal and 1 audio signal, and can be programmed to realize multi-picture segmentation. 1, VGA acquisition performance of high-definition and high-precision VGA signal acquisition card: 1600x 1200x85hz, RGB 24:30 fps；; 1280x 1024x85Hz，RGB 24:45 fps； 1024x768x85Hz，RGB24: 80fps
2.VGA image acquisition card supports the working mode of "one machine with multiple cards", which can realize multi-channel real-time acquisition and can bring voice switching screen. A single card can simultaneously collect 1 VGA signal, 2 video signals and 1 audio signal.
3. In terms of interface, brightness, contrast, chroma, saturation and picture size ratio can be adjusted (before a/d);
4. It is suitable for professional audio, video and image analysis. VGA acquisition card provides the development library under win2000/xp system, and supports vc, vb, delphi, etc. , and provide comprehensive technical support services from professional manufacturers. The underlying program is stable, rich in functions, simple to develop and easy to transplant. Good compatibility, stable and reliable work. It can work stably on compatible machines, original loaders/industrial computers.
5.VGA signal acquisition card supports the development of standard DIRECT SHOW API, fully supports DIRECT SHOW and WDM standard drivers, provides secondary development SDK, and provides free network and telephone technical support guidance and maintenance.
principle of operation
The working principle of VGA high-definition acquisition card is that RGB analog signals are converted into digital signals after A/D sampling, and then written into SDRAM as a buffer through FPGA, and then the collected compressed data are read out from SDRAM through FPGA and transmitted to the upper computer through PCI bus, and the upper computer transmits data. Real-time acquisition of VGA signal supports synchronous recording of sound. The display screen can be stretched or full screen, and the recorded format is avi, which ensures that all kinds of players can play it. In the later stage of recording, you can edit, delete or add the related content nonlinearly, adjust the color and clarity of the display screen, and adjust the recording frame rate and code rate.
Through high-speed PCI bus, images can be directly collected into VGA memory or host system memory. In addition, not only can the images be directly collected into VGA to realize single-screen working mode, but also the required number of sequence images can be continuously collected frame by frame by using the expansibility of PC memory for sequence image processing and analysis. If the VGA data of one PC is displayed and the VGA signal is collected on another PC, the traditional method is to convert the VGA signal into a video signal through a video converter VGA-Video, and then display and collect the VGA signal on another PC through a video acquisition card.
Video capture is the process of converting analog signals of video sources into digital signals (namely 0 and 1) through processing, and storing these digital information on the computer hard disk. This analog/digital conversion is carried out through the acquisition chip on the video acquisition card. First, the pc sends the command to start acquisition and waits for the interruption, then the VGA acquisition card will detect the synchronous start of the field, and then start to acquire a picture (according to the blanking and size of the line field). After the acquisition, the PC will be notified of the PCI interrupt. After receiving some interrupts, the PC will immediately start DMA to read the data of VGA acquisition card (just prepare the memory address and read size), and then complete the acquisition again after reading. The video acquisition chip converts analog signals into digital signals, and then transmits them to the temporary storage of the board card. Then, the video compression chip on the card executes the compression algorithm to reduce the huge video signal. Finally, these compressed signals enter PCI directly or through the PCI bridge chip and are stored in the hard disk.