What is a 4k3d Blu-ray DVD player?

First of all, what is 4k?

4K resolution is the Utlra HD standard. Based on this standard, a 4K image refers to an image with a pixel value of each row in the horizontal direction reaching or approaching 4096, and in most cases refers to a resolution of 4096*2160. Depending on the scope of use, 4K images also have various derivative resolutions, such as Full Aperture 4K’s 4096*3112, Academy 4K’s 3656*2664 and UHDTV Standard 3840*2160, etc., all belong to the category of 4K image resolution. Today's common 4K resolutions are 4096*2160 and 3840*2160. The former is mainly used in the field of digital movies, while the latter is mostly used on 4K TVs or 4K monitors. TVs or monitors with 3840*2160 resolution are also called UHDTV standard products. The UHDTV standard is formulated by the International Telecommunications Union, and its full name is Ultra

High Definition Television, which is ultra-clear TV. Compared with Full High Definition Television (FHDTV, Full HD TV) with a resolution of 1920*1080, the resolution of UHDTV is exactly four times that of FHDTV, and it can display more finely when the screen size is the same. images, and since the aspect ratio is also 16:9, UHDTV standard products are also well compatible with FHDTV images and are more easily accepted by consumers. However, strictly speaking, 4K TV and ultra-clear TV are not completely equivalent, because in addition to 3840*2160 resolution, the UHDTV standard also includes 7680*4320 resolution, which is also Called 8K resolution. Therefore, technically speaking, 4K TV is an ultra-clear TV, but ultra-clear TV is not limited to 4K TV. Nowadays, TV or monitor manufacturers will focus their promotions on “4K” rather than “ultra-definition”. In addition to the former sounding more technological, one of the reasons is that they hope to give future “4K” 8K” products leave room for differentiation.

Secondly, what is 3D?

To put it simply, it is 3D. D is the prefix for Dimension (line, dimension) in English, and 3D refers to three-dimensional space. Internationally, 3D movies are used to represent stereoscopic movies. The reason why human vision can distinguish distance from near depends on the gap between the two eyes. The human eyes are about 5 centimeters apart. Unless the two eyes are aimed straight ahead, when looking at anything, the angle of the two eyes will not be the same. Although the difference is very small, it is transmitted to the brain through the retina, and the brain uses this small gap to create depth of distance and thus create a three-dimensional sense. Although one eye can see objects, it is difficult to distinguish the distance of objects. According to this principle, if you take the same scene and create two images using the difference in the viewing angles of the two eyes, and then let the two eyes, one on each side, see the image on their own side, the brain can produce a sense of depth of field through the retina. Three-dimensional. There are many forms of 3D stereoscopic film production, among which the polarized glasses method is widely used. It observes the scene with the human eye, using two movie cameras placed side by side, representing the left and right eyes of the person respectively, to simultaneously shoot two movie frames with slight horizontal parallax. During screening, two movie films are loaded into the left and right movie projectors respectively, and two polarizers with polarization axes at 90 degrees to each other are installed in front of the projection lens. The two projectors need to operate synchronously and project the image on the metal screen at the same time, forming a left image and a right image. When the audience wears special polarized glasses, because the polarization axes of the left and right polarizers are perpendicular to each other and consistent with the polarization axis in front of the projection lens, the audience's left eye can only see the left image, and the right eye can only see the left image. The right image can be seen, and the left and right images are superimposed on the retina through the converging function of the eyes, and the brain nerves produce a three-dimensional visual effect. Displaying a series of coherent three-dimensional pictures makes the audience feel that the scenery is coming towards them or entering the deep recesses of the screen, which can produce a strong "immersive" feeling.

Finally, what is a Blu-ray player?

Just like the name···················