Video capture compression card






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Video capture compression card Business claims

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Video capture compression card, is the analog signal or digital signal decoding \ code according to certain algorithms to capture the signal to the hard disk or burn directly into the disc, the traditional video or other audio and video sources through the hardware coding compression, and Saved in digital format and saved.

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Basic Introduction / Video Capture Compression Card Editing

Video capture compression card is the analog signal or digital signal decoding \ code according to a certain algorithm to capture the signal to the hard disk or directly into the disc, the traditional video or other audio sources (such as: LD, TV) through The hardware is encoded and compressed, stored in digital format and saved for transmission. Because it is compressed so its capacity is smaller, the format is flexible

Hardware compression card, its compression ratio is generally not more than 1: 6, the software compression card is different, and its compression ratio determined by the software a few more than there is no standard, and compression generally have intra-frame compression and interframe compression. Compression card has the advantage of not to account for PC resources, so the lower the configuration of the PC can also be a good quality video (VCD / DVD), software compression is different, it needs a higher PC configuration. The capture will convert the video to a digital format that can be used by the PC. Micro as the professional image acquisition card is the video signal through AD conversion, after PCI bus real-time memory and memory. In the acquisition process, because the acquisition card to send data using PCI MASTER BURST mode, the image transfer speed of up to 33MB / S, the camera image to the computer memory can be a reliable real-time transmission, and hardly take up CPU more time to Do image computing and processing. Acquisition card for the camera, video recorder and other equipment to play the analog video signal through the digital collection, the file stored in the form. Usually video capture card by entering the analog composite video signal, you can display in the window, play video screen. Some video capture card can only capture digital still images, such video capture card, also known as video overlay card. Most capture cards not only capture still images (such as USB capture cards for capture), but also capture motion pictures (1080P HD video capture card), including a class of video capture card is used for professional-grade dynamic video capture , Editing and playback (such as support for real-time on-screen non-linear editing card), with hardware video compression. Video compression / decompression cards are used to compress still and dynamic video images according to the JPEG or MPEG standard, or to decompress the compressed digital video into images. At present, the market's video compression / decompression card is a typical product MPEG decompression card. Video output card The computer processed digital video signal is re-encoded and converted to PAL, NTSC or SECAM standard analog video signal for recording on tape or through television (video output card for non-series, such as SDI Hard disk output card). Use this type of product to view a computer screen on a TV or to record a computer demonstration using a VCR. This product is divided into two kinds of external and internal, built-in product is a function card, inserted into the computer motherboard I / O expansion external product is similar to a soap box size coding box. Video receiver card from the television program to capture the video image conversion processing, so that it can be generated with the computer text and graphics superimposed together, sent to the display. The use of such products can use the computer to watch TV programs, but currently on the market TV receiver card can usually only receive cable TV signal. There are many types of video cards, most of the video card has a variety of functions, the video card between both the different points, there are similarities, their functions are staggered. In the choice of video card, the card should pay attention to the function and practicality

Video compression card function introduction / video capture compression card editing

(PAL) 30 frames / second (NTSC), display resolution 704 * 576 (PAL) 640 (single-channel frame rate of 25 frames per second (PAL) 30 frames per second (NTSC), full-time full-time audio and video compression card, 4 audio and video input, H.264 compression, * 480 (NTSC), and the use of 10bitA / D conversion, multi-layer filter, the screen resolution, color richer gorgeous, image acquisition real-time performance stronger, higher sampling frequency, moving image software processing not nap, Not drawing, do not care, the image quality is the biggest enhancement, the performance is more stable.

Application range / video capture compression card editing

Multimedia education, industrial monitoring, security monitoring, intelligent transportation, media advertising, instrumentation, large screen display, machine vision, military police, aerospace and other fields.

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