Daniel
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What is memc on tv?What is MEMC motion compensation and shall we pay for TV with MEMC ?
After 4K and HDR, MEMC motion compensation technology has once again become the focus of attention. This technology, which only appeared on high-end TVs, has now become the trend of TV standard technology. So what exactly is MEMC motion compensation? Can MEMC motion compensation really "turn decay into magic"? As ordinary users, do we really need to pursue MEMC?
Before introducing MEMC motion compensation, we need to briefly understand a very important concept in the display industry-refresh rate (Hz). The more familiar name is FPS (Frames Per Second), which is the number of frames transmitted per second. The refresh rate of our common movie pictures is basically 24Hz, that is, the number of frames is 24 FPS. At present, the refresh rate of the pictures of low-end TVs is basically 50Hz or 60Hz, that is, the number of frames is 50 or 60 FPS. The more frames per second, the smoother the displayed motion, which is why many people feel the video is laggy.
Understanding this concept, let's talk about the LCD TV we are familiar with. The LCD TV mainly uses current to stimulate the liquid crystal molecules to generate dots, lines, and surfaces with the back lamp to form a picture. These liquid crystal molecules are "lazy and stupid" and only work when a signal is received. And once the picture changes too fast, these liquid crystal molecules will not react. The intuitive display is that the picture is blurred and the image is laggy.
To solve this problem, people came up with two solutions. One is to improve the response time of liquid crystal molecules, and the other is to improve the internal circuit processing technology. At present, the response time has been reduced from the early 25ms to the mainstream 8ms, and some high-end displays can even reach 1ms. But when the response time is reduced to a certain extent, the difference is not so obvious. Therefore, it is the best choice to improve the internal circuit processing technology and improve the motion blur by increasing the number of image frames displayed per unit time.
MEMC motion compensation technology was born under such background. MEMC stands for Motion estimate / Motion compensation, which is motion estimation / motion compensation. Its working principle is to use the "insert frame" technology, so that the original picture with only 24 FPS is displayed at a frame rate of 60 FPS or higher.
There are also many ways to insert frames, such as inserting a "black frame", that is, after displaying a frame of image, then displaying a frame of pure black image, using the visual inertia of the human eye to cover up the residual image of the image, to eliminate smear the goal of. But the disadvantage is also very obvious, that is, it will cause the problem of screen flicker and brightness reduction.
Another way is to insert repeated frames, but this method can only increase the number of frames of the original picture, and the picture will not become smooth.
We often say that motion compensation is the third kind, plug-in "operation frame". This approach is mainly through intelligent analysis of the two adjacent frames, and the algorithm automatically generates a new frame between the original two frames. This not only makes the picture smoother, but also effectively reduces the picture tailing phenomenon.
It needs to be explained that because the algorithm solutions of different chip manufacturers are different, the final results will also have advantages and disadvantages. Such as Sony, Dangbei, TCL with Mstar solution, Huawei, Honor with HiSilicon solution, Xiaomi with Amlogic semiconductor solution, etc. This will have slight differences in actual experience.
Does the MEMC motion compensation technology really have any defects?
MEMC motion compensation technology will exacerbate the effect of "motion artifacts", that is, blurred edges of moving objects, blurred details, and color confusion. It should be noted that the MEMC motion compensation technology itself does not cause "motion artifacts".
In addition, MEMC motion compensation technology may be wrong or invalid when faced with complex pictures. For example, the algorithm can only calculate the flight trajectory of a bird, but suddenly a group of birds appears on the screen, and the rendering effect at this time may be very bad. In addition, some movies are pursuing the artistic effect of low frame rate, and the addition of MEMC motion compensation technology will be counterproductive. For this reason, most manufacturers provide MEMC motion compensation switch options, allowing users to choose freely according to the actual viewing screen. Higher-end brands such as Sony also provide three different gears for high, medium and low.
Is it appropriate to use MEMC motion compensation technology as the watershed between low-end TV and high-end TV? Judging from the current trend, it is no longer appropriate.
The addition of Internet TV manufacturers has accelerated the popularization of high-end display technologies. MEMC motion compensation has also appeared on low-end and middle-end models like the previous 4K and HDR technologies. Therefore, it is not rigorous and unprofessional to judge the height of a brand based on the presence or absence of technology. It is not only a technology that can truly measure the market position of a TV.
For most consumers, MEMC motion compensation can indeed enhance the movie viewing experience. At present, the TV refresh rate of mainstream brands can reach more than 60Hz, but many film sources still maintain 24Hz or 30Hz. The addition of MEMC motion compensation technology can synchronize the frame number of the picture with the panel refresh rate, bringing a smoother experience.
But it should be noted that if the source itself has a very high frame rate, then on a panel with a 60Hz refresh rate, MEMC motion compensation does not have much room to play, which is why the panel refresh rate of high-end TVs can often reach 120Hz or even higher.
After 4K and HDR, MEMC motion compensation technology has once again become the focus of attention. This technology, which only appeared on high-end TVs, has now become the trend of TV standard technology. So what exactly is MEMC motion compensation? Can MEMC motion compensation really "turn decay into magic"? As ordinary users, do we really need to pursue MEMC?
Before introducing MEMC motion compensation, we need to briefly understand a very important concept in the display industry-refresh rate (Hz). The more familiar name is FPS (Frames Per Second), which is the number of frames transmitted per second. The refresh rate of our common movie pictures is basically 24Hz, that is, the number of frames is 24 FPS. At present, the refresh rate of the pictures of low-end TVs is basically 50Hz or 60Hz, that is, the number of frames is 50 or 60 FPS. The more frames per second, the smoother the displayed motion, which is why many people feel the video is laggy.
Understanding this concept, let's talk about the LCD TV we are familiar with. The LCD TV mainly uses current to stimulate the liquid crystal molecules to generate dots, lines, and surfaces with the back lamp to form a picture. These liquid crystal molecules are "lazy and stupid" and only work when a signal is received. And once the picture changes too fast, these liquid crystal molecules will not react. The intuitive display is that the picture is blurred and the image is laggy.
MEMC motion compensation technology was born under such background. MEMC stands for Motion estimate / Motion compensation, which is motion estimation / motion compensation. Its working principle is to use the "insert frame" technology, so that the original picture with only 24 FPS is displayed at a frame rate of 60 FPS or higher.
There are also many ways to insert frames, such as inserting a "black frame", that is, after displaying a frame of image, then displaying a frame of pure black image, using the visual inertia of the human eye to cover up the residual image of the image, to eliminate smear the goal of. But the disadvantage is also very obvious, that is, it will cause the problem of screen flicker and brightness reduction.
Another way is to insert repeated frames, but this method can only increase the number of frames of the original picture, and the picture will not become smooth.
We often say that motion compensation is the third kind, plug-in "operation frame". This approach is mainly through intelligent analysis of the two adjacent frames, and the algorithm automatically generates a new frame between the original two frames. This not only makes the picture smoother, but also effectively reduces the picture tailing phenomenon.
It needs to be explained that because the algorithm solutions of different chip manufacturers are different, the final results will also have advantages and disadvantages. Such as Sony, Dangbei, TCL with Mstar solution, Huawei, Honor with HiSilicon solution, Xiaomi with Amlogic semiconductor solution, etc. This will have slight differences in actual experience.
Does the MEMC motion compensation technology really have any defects?
MEMC motion compensation technology will exacerbate the effect of "motion artifacts", that is, blurred edges of moving objects, blurred details, and color confusion. It should be noted that the MEMC motion compensation technology itself does not cause "motion artifacts".
In addition, MEMC motion compensation technology may be wrong or invalid when faced with complex pictures. For example, the algorithm can only calculate the flight trajectory of a bird, but suddenly a group of birds appears on the screen, and the rendering effect at this time may be very bad. In addition, some movies are pursuing the artistic effect of low frame rate, and the addition of MEMC motion compensation technology will be counterproductive. For this reason, most manufacturers provide MEMC motion compensation switch options, allowing users to choose freely according to the actual viewing screen. Higher-end brands such as Sony also provide three different gears for high, medium and low.
Is it appropriate to use MEMC motion compensation technology as the watershed between low-end TV and high-end TV? Judging from the current trend, it is no longer appropriate.
The addition of Internet TV manufacturers has accelerated the popularization of high-end display technologies. MEMC motion compensation has also appeared on low-end and middle-end models like the previous 4K and HDR technologies. Therefore, it is not rigorous and unprofessional to judge the height of a brand based on the presence or absence of technology. It is not only a technology that can truly measure the market position of a TV.
For most consumers, MEMC motion compensation can indeed enhance the movie viewing experience. At present, the TV refresh rate of mainstream brands can reach more than 60Hz, but many film sources still maintain 24Hz or 30Hz. The addition of MEMC motion compensation technology can synchronize the frame number of the picture with the panel refresh rate, bringing a smoother experience.
But it should be noted that if the source itself has a very high frame rate, then on a panel with a 60Hz refresh rate, MEMC motion compensation does not have much room to play, which is why the panel refresh rate of high-end TVs can often reach 120Hz or even higher.
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