4K Chinese translation is called Ultra HD, which is relative to 1920× 1080 "HD" (2K). People usually refer to 4K as 4096×2 160 pixels.
4K pixels or 4K resolution?
As mentioned above, people usually refer to 4096×2 160 pixels instead of 4096×2 160 resolution.
Most digital cameras and digital video cameras use Bayer filter with a resolution of 1/2 to 2/3 pixels. Then a monolithic imager needs 6K to 8K pixels to achieve 4K resolution.
What is a Bayer color filter?
Bayer color filter was invented by Bryce Bayer, the father of digital image, and obtained the patent of 1976. Bayer color filter adopts mosaic layout composed of red, green and blue filters, which are 50% green and 25% red and blue respectively. It can make a single CCD or CMOS optical sensor shoot full-color images. Kodak scientist Bayer spent most of his life in Kodak and died on 20 12+0 10+03.
What is 8K?
4K refers to "4K pixels", 4096×2 160 pixels; By analogy, 8K refers to 8K pixels, and the number of pixels is 8 192×4320. 8K is not a legend. In May last year, NHK conducted an 8K live TV test in Tokyo. In August, NHK and BBC broadcasted some Olympic Games on 8K Ultra HD TV in London. 20 16 Japan will test 8K Ultra HD TV.
Is there a difference between 4K in TV and 4K in movies?
Television 4K refers to 3840×2 160 pixels, and movie 4K refers to 4096×2 160 pixels. Similarly, there are differences between the two platforms: TV 2K refers to 1920× 1080 pixels, and movie 2K refers to 2048× 1080 pixels. That is to say, what people call 4K refers to "movie 4K", and what people call 1080P HD is actually a kind of "2K".
Does the TV need 4K?
The effect of TV 4K depends on the screen size and resolution. The bigger the screen and the higher the resolution, the more you can feel the effect of 4K pixels. Sony claims that screens over 60 inches need 4K to display perfectly. Sony released the 84-inch 4K BRAVIA LCD TV in August last year, but because it is too expensive (654.38+0.7 million RMB) and too big, only a few hundred sets have been sold so far (although it still exceeds expectations). Sony released 55-inch and 65-inch 4K TVs at CES 20 13 in June and October this year, which was officially released in the China market yesterday.
What is the best viewing position for 4K TV?
The best viewing position of 4K is 1. 1- 1.5 times the screen height. For example, if the height of the TV is 1 m, then the best viewing position is 1.5 m away from the TV, otherwise the effect difference between 4K and 2K will not be seen. Similarly, if the height of the 4K projection curtain is 3 meters, the most suitable viewing position is 4.5 meters away from the screen.
What is the situation of 4K TV terminal?
Like HD and 3D technology, the 4K era is also the market leader of terminal products. Sony, Toshiba, Panasonic, Sharp, LG, Skyworth, Konka and other manufacturers have launched 4K or 8K TV sets. Toshiba began to sell 55-inch 4K TVs as early as the end of 201,Sony released 4K TVs and 4K projectors on 20 12, and Sharp released 85-inch 8K TVs on 20 12. ...
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