Video Capture Card Development Status

Video Capture Card Development Status

Video capture card is the result of the continuous development of information technology and the introduction of computer technology into video capture and video processing. The use of computers to process video information and digitally transmit video data has been widely used in many fields. High-definition video capture cards are rapidly developing. The following introduces the development status of video capture cards.

Video Capture Card Development Status

Video capture is also called video card. According to its use, it can be divided into broadcast video capture card, professional video capture card and civil video capture card. Most video capture cards have the function of hardware compression. When the video signal is collected, the video signal is first compressed on the card, and then the compressed video data is transmitted to the host through the PCI interface. The general capture card uses the intra-frame compression algorithm to store the digitized video as an AVI file, and some high-end video capture cards (hard compression cards) can directly compress the collected digital video data into MPEG-1 format files in real time.

With the continuous development of information technology, computer technology has been introduced into the field of video capture and video processing. Using computer to process video information and digitally transmit video data have been widely used in many fields. The high-definition video capture card is not only the notes of distance education training, but also the cradle of the era of the National People's Congress.

In the era of mobile Internet, most users in China have entered the era of industrial informatization, giving HD video capture cards a chance to be used by all citizens.

The increasing popularity of high-definition capture and display devices, especially the large-scale use of high-definition cameras and large-screen display devices, and the inconsistency of the frequency of collection devices and display devices are becoming more and more serious. In the display market LCD dominates. Since the LCD screen maintains display characteristics (the image maintains a certain brightness for each frame of display time) and is integrated with the visual persistence feature of the human eye, when the screen is large and the refresh rate is not high, the viewing dynamic picture may have a sense of sensation. , resulting in decreased dynamic object resolution and visual fatigue. For video surveillance applications, the current video capture device capture frame rate is generally 25 frames per second or 30 frames, while the display device's mainstream refresh rate is 50Hz or 60Hz, higher than the acquisition device.