1, how to distinguish between true and false 4K?
Did the 4K movies and 4K pictures we saw before be real 4K?
About true and false 4K, has always been a topic of general concern to manufacturers and users. We know that 4K refers to a resolution of 3840x2160 or 4096x2160, a signal with a width of less than 3840 cannot be called 4K, and a height of less than 2160 cannot be called 4K. The same 4K signal also has different differences, such as the frame frequency is 30Hz or 60Hz, the color space is YUV or RGB, etc. These display quality differences will be more obvious for display devices with very good display effect.
The difficulty of the 4K picture 60Hz is that the data volume is large and the bandwidth is high. Compared with the common 1080P 60Hz point frequency is 148MHz, 4K 60Hz point frequency is reached 594MHz, which is more stringent for the signal transmission and processing requirements.
2, the color space determines the key to true and false 4K
For 4K, color space is also a very important parameter. The most widely used are the RGB and YUV formats, which are all color-coded YUV. YUV and RGB mode can be converted to each other, and RGB represents red, green and blue, YUV three letters represent the brightness signal and U, V color difference signals.
Because of having different parameter standards, we also have our current true and false 4K dispute. Nowadays, a 4K display with a 4:4:4 ratio of 60 Hz is generally referred to as a true 4K. With the constant development of the demand in the audiovisual field, currently, display equipment and signal processing equipment capable of achieving this standard will become more and more abundant.
Smart TV/box information can focus on smart TV information network sofa butler (http://), China's influential TV box and smart TV website, providing information, communication, etc. on TV boxes, smart TVs, smart TV software, etc. Answering questions.
Did the 4K movies and 4K pictures we saw before be real 4K?
About true and false 4K, has always been a topic of general concern to manufacturers and users. We know that 4K refers to a resolution of 3840x2160 or 4096x2160, a signal with a width of less than 3840 cannot be called 4K, and a height of less than 2160 cannot be called 4K. The same 4K signal also has different differences, such as the frame frequency is 30Hz or 60Hz, the color space is YUV or RGB, etc. These display quality differences will be more obvious for display devices with very good display effect.
It's time to polish your eyes. How do you distinguish between true and false 4K?
Taking a common HDMI connection as an example, the maximum frame rate of the HDMI 1.4 standard is 30 Hz, ie, 30 frames per second are transmitted. This parameter of HDMI 2.0 is a maximum of 60 Hz, ie, an image of 60 frames transmitted per second. The parameters of 60 frames are twice as high as those of 30 frames, and the picture quality and details are better. The higher the number of frames, the smoother the picture, and in the fast moving angle of view, the 60 frames of the afterglow are much smaller than 30 frames, and the higher the value, the more the picture becomes. Close to the real world observed by the human eye. 2, the color space determines the key to true and false 4K
For 4K, color space is also a very important parameter. The most widely used are the RGB and YUV formats, which are all color-coded YUV. YUV and RGB mode can be converted to each other, and RGB represents red, green and blue, YUV three letters represent the brightness signal and U, V color difference signals.
Currently 4K TV is very common in the market
What is the meaning of the various proportions of color space? The first 4:4:4 represents the YUV signal sampling storage method. In addition to 4:4:4, 4:2:2, 4:2:0, and 4:1:1 sampling formats are common. . In simple terms, the 4:4:4 signal is lossless, with richer information and better picture color, but it requires very high storage space and transmission bandwidth. The other three ways are to save bandwidth and storage space and to compress colors. And our common 4K is 4:2:2. It's time to polish your eyes. How do you distinguish between true and false 4K?
Compared to RGB, YUV's compression method has an inherent advantage. It separates contour and color information, compresses only the color, and does not affect the contour. The Y signal is Luma, which represents the brightness information. Intuitively, it is the outline. Whether it is 4:2:2 or 4:2:0 or 4:1:1, the luminance Y corresponds to 4, which means that the contour information is not compressed, and the compression is to compress the color information. The difference is that RGB compression of the three primary colors of the signal more easily affect the definition of the contour. Because of having different parameter standards, we also have our current true and false 4K dispute. Nowadays, a 4K display with a 4:4:4 ratio of 60 Hz is generally referred to as a true 4K. With the constant development of the demand in the audiovisual field, currently, display equipment and signal processing equipment capable of achieving this standard will become more and more abundant.
Smart TV/box information can focus on smart TV information network sofa butler (http://), China's influential TV box and smart TV website, providing information, communication, etc. on TV boxes, smart TVs, smart TV software, etc. Answering questions.
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