Cognitive digital pixel resolution:

First of all, from the perspective of resolution (digital pixels), from the era of standard definition to high definition, from 720x576 to 1920x1080, the aspect ratio is from 4:3 to 16:9. This is what we are more familiar with. 4K is actually established On the basis of high definition, we call it "Ultra HD" UltraHD, which ranges from 400,000 pixels of 720x576 to 20 million pixels of 1920x1080. When it comes to 4K, our resolution has increased by 4 times on the basis of HD, from 1920x1080 (1080p60) to 3840x2160 (2160p60), which means that the horizontal is 1920x2, the vertical is 1080x2, and the resolution has increased by 4 times. What There is no change, that is, the aspect ratio has not changed. It is still 16 to 9. Why is it called QFHD? Q is QUAD, which refers to 4 times, and F means FULL, which is 4 times full HD.

There are two mainstream 4K UHD baseband signals on the market:

6G/12G-SDI digital serial UHD baseband signals for the film industry, for example, for the broadcast market, where the application scenarios are mostly in TV stations, studios, etc.; parallel HDMI1.4/2.0 UHD baseband signals for consumer terminals, such as Digital video output for consumer-grade cameras, game consoles, high-definition digital set-top boxes, etc. The following focuses on the digital video SDI interface.
 
Digital video SDI interface:
Digital video SDI interface:
The SDI interface is an acronym for serial digital interface, and is a digital video interface standard developed by the SMPTE (Society of Motion Picture and Television Engineers) organization. SMPTE is an international organization responsible for the preparation of SDI standards, and all current SDI standards are formulated by it.
 
The serial interface is an interface that sequentially transmits each bit of a data word and corresponding data through a single channel. Because the data rate of the serial digital signal is very high, it must be processed before transmission. It is a digital baseband signal. The SMPTE organization officially released the 6G-SDI and 12G-SDI of the serial data interface in 2015. 6G-SDI is oriented to 2160p30 applications, corresponding to the refresh of 30 frames per second. And 12G-SDI is oriented to 2160p60 (commonly known as true 4K) applications, which corresponds to a refresh of 60 frames per second.
 
4K UHD baseband signal application scenarios, 4k source production process:
 
When recording 4K programs in the film industry and broadcasting stations, most of them use professional 4K high-definition camera and editing systems. At present, most high-definition 4K professional cameras on the market use 4-channel BNC to simultaneously transmit 12G SDI HD signals, which belong to 4x 3G-SDI. Parallel mode, such as SONYPMW-F55 4K cameras currently use this digital video interface. Currently it is 4K high-definition video. I have tried a 60-meter high-quality cable in the broadcast and it can still meet the transmission. The 3G SDI signal all the way to 60 meters is close to the limit, otherwise the image quality will be problematic.

The above is about the introduction and sharing of the 6G SDI/12G SDI baseband signal uncompressed transmission scheme, and I hope it will be helpful for you to purchase and use our products.