High-definition video capture card aids stream media clear picture construction

When the monitoring system has gone through several historical stages of simulation, digitization, networking, and intelligence, high-definition monitoring has become a new application demand highlight with the deployment of network monitoring. In the high-definition camera integrates the image acquisition, image coding, image transmission and other modules. In the field of streaming media, video capture cards occupy a very important position. From the earliest ordinary video capture card to the current high-definition VGA capture card, DVI capture card, HDMI capture card, etc., all have made great progress in their respective technologies. With the continuous development of science and technology, the demand in the video field has increased and higher requirements have been placed on current streaming media capture cards.

Today, with the rapid development of network technology, smooth, high-definition, and real-world images will bring a rich and colorful image world to our network life. We will focus on research and development, care about customer experience, and develop technologies for high-end machine vision products. Requirements, strong launch of VGA \ DVI \ HDMI and other interfaces of the sixth-generation high-definition image capture card, will inject new vitality for the development of the streaming media industry.

In the video compression coding section, different compression algorithms and algorithm implementation schemes determine the quality and coding efficiency of high-definition images. The soft compression method has been unanimously approved.

1, compression efficiency is getting better

The popularity of soft-compressed video capture cards is mainly due to the current increase in computer configuration and more comprehensive software performance. In the past, hard compression was superior to soft compression in video compression. The soft compression card uses CPU compression and consumes computer resources. The high configuration computer is the key to the long-term stable operation of the soft compression acquisition card. As the market's mainstream CPU performance and speed increase, the soft compression processing capacity is also strengthened. Using ordinary P42.8G can compress 4-24 channels (352X288) real-time. The soft compression card uses inexpensive AMD64-bit CPU to compress video, and becomes a Easy things to do, compressing high-definition video in real time will no longer be a problem. So now soft compression has begun to replace hard compression cards.

2, the current computer performance is good, the factors that restrict the soft pressure card reduction
In the past when using a soft press card, you often encountered some "compatibility" issues. Computer performance has become the biggest bottleneck restricting the development of soft presses.

1) CPU compatibility issues: Soft compression cards deal with images by the CPU. Previous CPUs have a lower ability to process data. The high-quality screen and the requirement for a small footprint, such video files are very CPU-intensive. If the CPU usage is always too high, the system will crash.

2) Motherboard compatibility issue: The image data collected by the soft press card is not processed and the data volume will be relatively large. If the motherboard does not handle these data, it will lead to data loss, and then there will be issues such as image drawing, image color distortion and so on.

3) Power compatibility issues: Soft presses generally do not have their own power supply, and the normal operation of the video capture chip requires adequate power supply protection. If the power supply is insufficient, the screen may be distorted, the screen may not come out, and the camera may hang.

Therefore, at present, the soft compression method of the video capture card has been unanimously approved by users, and it has been widely used in various industrial fields due to its stable performance, wide compatibility, low cost, and simple operation.

How do we choose the right DVI capture card

In high-tech society, high-definition has become an indispensable part of people's lives, and high-definition video is typically used in hospital surgery. Hospitals demand strict surgical video and require images in terms of color, saturation, and details. Very good ability to restore. At the same time, the image and speech guided by the conference room experts and related reference materials prepared by experts can also be transmitted to the operating room through the equipment in the conference room for reference by the surgeon. Since most medical display devices nowadays use DVI interfaces, the acquisition of such video source devices requires high-definition DVI video capture cards.

DVI video capture card selection needs to pay attention to several aspects

1DVI is not a true digital signal architecture. The acquisition card of the DVI digital signal architecture is much more difficult to research and develop than a VGA capture card. Therefore, we must pay attention to whether the selected VGA transfer is done on the card. The DVI interface module is not a true DVI architecture pure digital capture card. Weishi Image Company Dual HD VGA\DVI\HDMI universal professional audio and video streaming media capture card, high precision digital to analog conversion, can get high resolution, high speed, high quality lossless VGA image and DVI, HDMI digital image, using Dual DVI-I can capture dual VGA, DVI, HDMI interface signals output from graphics equipment such as computers, which can solve VGA, DVI, and HDMI interface cards. 2 Due to limitations of development technology, DVI capture card needs to be included. The technical threshold for the VGA capture card to capture discrete graphics output and non-independent graphics output will be high. We must pay attention to whether or not to support the selection of such products.

3 Is there an onboard cache, this is important, and many of the key features of the capture card require onboard cache to improve. VITV's high-definition two-channel DVI/VGA/HDMI capture card supports simultaneous dual-channel HD signal acquisition, onboard memory 128MBDDR2 per channel (general video capture and display solutions require the use of 2 DMA channels and 2 SDRAM cache, To do image processing).

4DVI dual-channel capture card is not a simple two-card copy. It is really necessary to combine two DVI capture cards into one, one slot and two cards, and collect two DVI signals at the same time. The parameters must be independently adjustable and cannot affect each other. It is not that two cards are completely set to be used in the same way. It is not possible to set one or the other to influence another, and it is also necessary to be careful when selecting. Weishi image dual HD VGA \ DVI \ HDMI universal professional audio and video streaming media capture card supports a machine multi-card, multi-channel and angle device is essential for high-definition video capture.

5 The application of software should be relatively simple, because DVI dual-channel capture card is to collect non-standard image signals, many parameters need to be debugged, so the software design should be conducive to smooth debugging for the first-time users, and quickly achieve the best results. The streaming media acquisition card signal is completely self-adaptive and can be completely matched without the need of customer debugging. In terms of software compatibility, the DVI series audio and video streaming media capture card compatible with Windows DirectShow/DirectSound API, compatible with a large number of existing audio and video processing software .

5 Others such as the production process of the board, the quality of the board, the quality of the device, and the ability to solve technical problems are mentioned in the relevant documents, and will not be repeated here.

Conclusion

With the increasingly sophisticated application of video capture cards, high-definition camera technology has become increasingly sophisticated, from video conferencing, plant monitoring to residential security are all inseparable from its presence, in the face of previous "unclear" in the video, nowadays All have been well resolved. It is believed that the development of HD will bring us more visual stunning of ultra-high image quality and super-wide scenes.

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