Is there an SDI capture card that supports M 2?

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What about Mrs. Sister, sister, you have to be idle, the version of Tutu Rabbit Assistant is updated, and Canon suffers. What about Mrs. Sister, sister, you have to be idle, the version of Tutu Rabbit Assistant is updated, and Canon suffers. What about Mrs. Sister, sister, you have to update the version of Tutu Rabbit Assistant, Canon suffers.

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The original data stream is scrambled and converted to NRZI code before transmission to ensure reliable recovery of the original data at the receiving end. In this way, a digital serial interface can be conceptually understood as a baseband signal modulation. The SDI interface is capable of signaling through a serial digital component of 270MB s, for 16:

9 format images, which should be able to transmit a 360MB s signal. The NRZI code is a polarity sensitive code. "1" and "0" indicate high and low levels, and if there is a continuous "1" or continuous "0" for a long time, it will affect the receiver to extract the clock from the digital signal.

Because the serial digital signal interface does not transmit a separate clock signal, the receiver needs to extract the clock signal from the digital signal stream, so the NRZI code with and without level shift is used to indicate "1" and "0". When receiving the NRZI stream, as long as the level shift is detected, the data can be recovered, even if it is all "1" signals, the resulting signal frequency is only half of the original clock frequency, and then after scrambling, the chance of continuous "1" is reduced, and the high-frequency components are further reduced. At the receiving end of the stream, the SDI decoder restores the original stream from the NRZI stream.

The SDI interface cannot directly transmit compressed digital signals, and the compressed signals recorded by digital video recorders, hard disks and other devices must be decompressed and output through the SDI interface before they can enter the SDI system after being replayed. If it is repeatedly decompressed and compressed, it will inevitably cause the image quality to deteriorate and the delay to increase, so the digital video recorders and nonlinear systems of various formats have defined their own interfaces for the direct transmission of compressed digital signals.

Both SDI capture cards and HDMI capture cards can embed audio, both are digital signals, and the resolution that can be transmitted can reach 4K.

If you want to transfer a long distance, it is recommended to use an SDI capture card, which can be extended directly with an SDI cable. If the quality of the cable is better, the transmission distance will be relatively farther.

If it's HDMI, the distance is much less, just two or three meters away. Unless you use an HDMI network cable extender. to increase the distance of HDMI transmission.

So you have to choose according to your actual situation. Whether it is an SDI capture card or an HDMI capture card, including network cable extenders, fiber optic extenders can be consulted with 3D technology.

In fact, before this question, you need to understand the differences between these interfaces. First of all, the VGA interface transmits analog signals. Secondly, the DVI and HDMI interfaces transmit digital signals.

DVI、HDMI interfaceIn fact, the hardware architecture is exactly the same,Including some pin definitions,If the capture card itself is a real DVI capture card or HDMI capture card, they can be interoperable。 The advantage of the HDMI interface is that it is small in size and has more pins for connecting to audio. The difference between VGA capture card, DVI capture card, and HDMI capture card is that the first acquisition is resolved, and in general, VGA will be higher, because many cards now perform single-link data transmission, so the resolution of DVI and HDMI interface acquisition is not as high as VGA, but the image details and image quality collected by DVI and HDMI interface are much higher than VGA.

Hope it helps.