Refresh rate (index of dynamic scenes) TV, 100, 200, 400, 600, 800, 1000, 1200, 1400, 2000 explained
Technologies improve the smoothness of motion in dynamic scenes from different manufacturers
All of these technologies there is an index determining the visual perception of the image and not Immersed nothing to do with the real rate of image display.
- Active Motion & Resolution(AMR) - TV Toshiba
- Clear motion rate (CMR) - TV Samsung
- Motion Clarity Index (MCI) - TV LG
- Motionflow XR в TV - Sony
- Backlight scanning BLS - TV Panasonic
- Clear Motion Index (CMI) - TV Thomson
- Perfect Motion Rate (PMR) - TV Philips
- Subfield Motion в plazma - Samsung
Different companies use their own name technology that evaluates the quality of the display of dynamic scenes. And it should be noted that the figure does not show the actual frame rate on the screen, since all standards stipulate frame rate, originally recorded at the image recording.
Recording and playback of standards
- 1080i: interlaced standard with frame rate of 25, 29.97 or 30 frames per second
- 1080p: standard with progressive scan allows the use of frame rates 24, 25, 30, 50 or 60 frames per second
- 720p: Standard progressive (non-interlaced) sweep, allowing the use of frame rates of 50 or 60 frames per second
- SD: standard digital TV 50 or 60 frames per second.
- The analog signal: 25 frames per second.
At the moment, the maximum frame rate even in the new 1080p standard is only 60 frames per second.
For a smoother viewing moving images and are these technologies. Man as we know does not perceive the frequency of 50 Hz as a flickering, and perceived as a permanent component.
To achieve the desired effect applied technology duplication of frames, the viewer is shown each time the same frame 2 with the original 50/60 frames per second, thanks to the refresh rate is already 100 or 120 Hz. And if 3 show that it is 150/180 frames per second.
Due to the fact that a person under 50 Hz flicker does not notice that he does not care what the frequency of 200, 400, 800Hz all these names have raspiarenny marketing course allows you to sell more expensive televisions with completely unnecessary functions from the perspective of human physiology. The same electric current we have the frequency of 50/60 Hz but why no one thought of selling the device to increase the frequency of 2 or more times that allows you to create a soft lighting premises, because it is absolutely not necessary. Let's say for example by increasing the index 200Hz people will not notice the difference compared to the 400 or 800. In this case, 200Hz, 400Hz, 600Hz, 800Hz is the marketing name of the same technology and they do not mean that your TV shows with this frequency. The technology stipulates that for the viewer TV shows with some sort of parameters commensurate with the specified frequency.
For comparison, the current matrix LCD TV screens the same TN are usually the response time of 2 milliseconds. TN matrix does not apply to the leading manufacturers of televisions, mainly used in the matrix produced by IPS technology as they provide the best viewing angle and picture quality, and they have a response time of 4 ms
Consider TN matrix as the ideal solution.
1 second, 1000 milliseconds divide 1000/2 = 500 the maximum number of frames that can display the screen of the TV 500 frames per second. In order to overcome the laws of physics manufacturers stipulate that such screen refresh rate (taking into account possible lawsuits invented various names did not speak directly about the update frequency of the screen such as MCI, clear motion rate, AMR) increase as if the frequency display images, is achieved by joint application to increase the frequency, special illumination, processor, etc. The modern TV with the stated frequency of more than 400Hz manufacturers do not indicate the time of the screen response matrix so as not to cause unnecessary problems, and in 2013 this parameter as the response time generally removed from the technical characteristics of the TV.
Plasma panels have a response time much less response time and they practically do not take into account, in the plasma is possible to obtain high image refresh rate.
Increased frequency necessarily apply when viewing 3D active as there occurs queued dimming the TV screen to the left and right eyes, and as a consequence of a decrease in the frequency display 2 times.
Nevertheless, these technologies really do visually dynamic scenes smoother and easier to view, this is achieved by not only increasing the number of displayed frames and the use of special illumination algorithms:
- short off the backlight that allows you to remove motion blur.
- strobe illumination of the frame, on the TV screen is highlighted in a certain sequence.
The combination of all of these techniques makes the image for the viewer to visually smoother.
TVs can be divided into 3 groups
- Televisions with a real frame rate on the display 50 or 60 per second.
- Televisions middle segment to 120 frames per second.
- Premium TV (expensive TV) 240 frames per second in 2013, it reached the maximum frame rate.
What we can conclude: Yes, if you watch the video with the initial frame rate of 24 per second, the inclusion of features to improve dynamic image does it make smoother, but if you watch the video with the initial frame rate of 60 per second, all of these technologies for your perception will be virtually not noticeable.