How can I see the stuttered video feel smooth?
Editor’s note: This article is from WeChat public account “ 爱 范 儿 ” (ID: ifanr), author: Li Chen.
An interesting point in the age of social media is that whoever is more aggressive and who speaks louder and louder will take the lead in public opinion. Xiaomi, an internet-born, naturally understands this. However, in the TV field, Xiaomi TV has always been in a situation where there is no direct opponent, so it has been relatively quiet.
Huawei and Honor’s entry last year seemed like a catalyst, so that the low-volume TV market began to have social vitality. The emergence of the smart screen was a deep-water bomb that forced Xiaomi to confront each other. In the process of your coming and going, many things or technical terms that were not well-known to everyone have been thrown out one by one, such as the previous speaker power dispute, and the MEMC that has not been supported before Xiaomi TV 5 Pro Function has also become a soft underbelly of Xiaomi in this fight.
Knowing what MEMC is and why it is useful
MEMC is shorthand. The original word is Motion Estimate and Motion Compensation, which means motion estimation and motion compensation.
To put it plainly, this is a very common video frame interpolation technology. In fact, there have been three different types of frame interpolation in TV frame compensation, which are inserting duplicate frames and inserting black frames. And interpolate the calculated frames.
The effect of inserting and duplicating frames is the worst, it just increases the frame rate of the original video, but it does not help the smoothness of the video. The purpose of inserting black frames is to reduce the visual residual phenomenon to reduce the feeling of smear. The interpolated frame is the best one. It can really improve the smoothness perceived by the human eye. With the rapid increase of the chip’s computing power, this interpolated method is getting better and better. Can also support to higher.
Sony’s motionflow technology
The principle of interpolation calculation frame is to estimate the trajectory of a moving object in the picture through motion estimation, and then insert an intermediate frame between two adjacent frames through the frame interpolation technology, so that the number of frames of the original video can be realized. Times, the video at 30 frames rate becomes visually smoother and smoother at 60 frames.
In terms of the computing power of TV display chips, many TVs not only support “double-speed drive”, but now they can even insert video frames up to 200 frames. At the same time, combining multiple frame insertion methods can achieve the picture effect. The optimization, such as Sony’s MotionFlow technology, is to improve the smoothness of the picture and reduce the smear phenomenon through two methods of frame insertion and black sweep.
Samsung’s frame interpolation technology is called Auto Motion Plus
Not only Sony, in fact, most TV brands have already implemented similar technology, but the functions are called differently, such as Samsung ’s Auto Motion Plus, LG ’s TruMotion, Toshiba ’s ClearFrame, etc. . Domestic TVs like Huawei’s smart screen, and Xiaomi’s latest Xiaomi TV 5 Pro also have MEMC technology.
Although everyone has similar technologies, the final effect may still be very different. For example, it is currently recognized that Sony ’s high-end TV should be the best for frame insertion, and why Sony ’s effect is good because of sports The estimation is more accurate, and the intermediate frame generated by calculation is more suitable.
A section of the material that knows @ 蓝 大 仙人 is Huawei Smart Screen and SonyThe comparison of XG8500 in MEMC function, through slow motion, the screen shake and fluency of the smart screen on the left are inferior to those on the right, and the Sony TV is obviously smoother.
“People have nothing but me, and people have me.” As for how to achieve excellence, it depends on the accumulation and precipitation of technology.
In actual application scenarios, more applications of MEMC in the TV field are in sports events, such as football or racing. Due to the fast moving speed of the object and the large swing of the lens, the biggest problem of this kind of program is that the picture is blurry and shaky. After compensation by MEMC, the smoothness of the picture will be improved qualitatively, and the shake will be reduced .