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Refresh Rate Explained Trying to choose a TV today may be difficult. Very difficult. One of the most widely debated features of flat panel TVs is the ever mixing up Refresh Rate. There are rather a number of dissimilar refresh rates being featured on today’s Digital TVs. 50Hz, 100Hz, 200Hz, and 600Hz. These Refresh Rates may without apparent effort divide opinion. What is Refresh Rate, and why is it important? Every video we watch is made up of thousands of “frames”. The refresh rate, or “Hertz” (Hz) is a measure of the number of frames shown on your TV screen each second. Remember in your younger years, when you were bored in school and used to draw a stick figure in the top corner of each page in your book, and then flick through it speedily to make it look like it was moving? This is fundamentally what your TV is doing to construct motion on the screen. It is freshening (i.e. flicking) through frames (i.e. pages) to invent motion. Now the rapidly and without delay you may flick through pages in your book – the quicker and smoother the stick figures motion seems to be. Secondly, the more stages of motion you draw the stick figure in on each page – the more natural it will seem to move. So let’s go back to our TV – if the same primary is applied, then the TV is capable to show you a smoother motion if it may flick through it is frames quicker. And by adding extra frames in amid other frames – this causes the TV to construct a smoother transition from one frame to the other. So, the more times the screen may be “refreshed” each second, the smoother the image’s motion will seem to be. The popular broadcast signal we receive in Australia is 50Hz. That means that the effigy on your Digital TV is refreshed 50 times each second. 50Hz is a somewhat slow rate, and it is possible to see blurring or judder in the picture when looking at fast moving sporting events or action movies, or any scenes where the camera pans all over very fast. So the way the TV fixes this issue is to invent intermediate frames and then insert them amongst the primary frames. This is referred to as interpolation, or 100Hz Technology. “100Hz technology doubles the number of frames shown per second which helps to reduce the blurring and is idealisti for observing action movies and sports.” To galore people, the 100Hz motion may seem to be a bit “too” smooth initially, but once you adjust, it may be very difficult to return to a 50Hz TV, specially on a huge screen. Today, larger and more spectacular TVs have become very accessible in terms of price. Now because the picture is bigger, you will observe things like judder even more. The majority of these huge Flat Screen TVs (if not all) are 1080P Full HD. That means that there is a lot of selective information being displayed on the screen, and all of that data needs to be moved around very fast for it to look smooth. On a huge Flat Screen TV running at 1080P and 50Hz, fast panning shots may show a lot of judder, because there is just so much effigy data being shifted around the screen, our eyes will pick up a lot of motion artefacts. So essentially, by doubling the number of frames, 100Hz removes the majority of motion judder. So if 100Hz gets rid of judder, why do I need 200Hz? Interpolation at 100Hz is good, but again, with a lot of Full HD, high solution content like Blu-Ray, Gaming and more lately 3D Technology, now available to each home, and 46″ – 65″ LED screens surging in popularity due to plummeting prices – there’s more gain to be had from your TV doubling it is refresh efforts. While 100Hz will surely remove a lot of motion judder from LED TVs and LCD TVs, the larger the screen, the more evident the remaining artefacts and judder become. So 200Hz was born… By inserting 3 further and added frames amidst each existent frame, rather of one as 100hZ does, 200Hz processors improve motion smoothness further and succeed in making objects look more “solid”. The intention of 200Hz is to keep objects such as Soccer Balls, or any little objects moving very fast throughout the screen, from losing their shape, blurring or breaking up when being propelled throughout the screen. However, it’s not as simple as just adding an extra three frames – that’s not rather the extent of the technology. A processor inside the TV looks at two sequential frames and then actually produces three NEW further and added frames in among them. Going back to our stick figure analogy, that means drawing four times as numerous stick figures by using four times as a heap of pages, and flicking through those pages at the same speed. This fact, however, is where a lot of 200Hz TVs succeed – or fail miserably! Imagine you’ve drawn a stick figure on fifty pages, and may flick through those fifty pages in one second, without missing a page, and at a ceaseless speed. Now double those pages, and you will find it harder to flick through the whole hundred pages without missing a few – let alone the same speed throughout. So your stick figure may seem to move smoothly, then judder, then with no problems or difficulties again. Now, imagine attempting to do that with two hundred pages. It’s a struggle, and you are sure to miss a number of pages along the way. To put it one way – some humans will do a better occupation than others. This also rings very unfeigned for TVs. There are a good deal of processors out there which do a much better occupation than others do. There are a heap of 200Hz processors which don’t rather cut the mustard, and you may see odd frames skipping, a large total of inaccurate and seemingly unnatural movement. So beware – not all 200Hz processors are produced equal! A lot of Plasma screens seem to spotlight 600Hz – they will have to be at least three times faster, right? Well in short – not exactly! What 600Hz Sub-Field Driving does, with a 50Hz source like how our Australian TV is broadcast, is split each frame into 12 distinguished frames or “sub-fields”, and then show them on an individual basis on the screen. What it does not do is give rise to NEW frames. That means 12 sub-fields per frame in 50Hz (frames per second) brings about 600 frames per second (50×12=600). The more sub-fields you have per frame, the more exact the colour reproduction and less picture noise. So technically, 600Hz sub-field drive is not solely linked to, nor is it is primary purpose, eliminating motion judder. Why are the manufacturers causing all this confusion? Because Plasma vs. LCD engineering science is still the biggest debate when it comes to choosing a Flat Screen TV. The divergence in engineering is causing makers like Panasonic, Samsung, LG and Sony to to a great extent publicize features and gains of their panels to attract customers. As far as LCD, and now LED Digital TV Panels have innovative – the fact of the matter is that for smooth, natural motion in fast scenes – a Plasma is still superior. With the way Plasma engineering works, 100Hz or 200Hz isn’t a utile feature to have. But with LCD and LED to a considerable degree retail 100Hz/200Hz, from a marketing perspective they necessitated a number to combat that. Some added 100Hz before, but now 200Hz LED and LCD have become more common, so they’ve started quoting the sub-field number – 600Hz. The same thing happened with 1080p and ‘Full HD’. LCD makers introduced terms on their TVs – strictly from a retail perspective – to undertake and deflect attention from the fact that a good Plasma TV formulated a more “natural” picture. In reality, the plasma manufacturers are being more or less misleading in how they market 600Hz sub field driving. In one way they are saying to clients that our 600Hz is a feature that helps remove motion judder three times as much as a 200Hz TV. While this is not directly true – they are using it to promote a very unfeigned feature of plasma technology – superior motion handling. There is a little bit of “the pot calling the kettle black” when it comes to the LCD manufacturers though. While it is unfeigned that 200Hz was designed to aid motion on a big screen TV – the fact that the resulting effigy may often seem unnatural for the duration of fast scenes puts a huge question mark over whether this aids or hinders what the client is seeing. The insertion of frames that are not meant to be there may make it all look a little fake, in some people’s opinion. If you do encounter that, it’s best to disable it for that queer movie. So, what is best? 100Hz, 200Hz or 600Hz? In summary, for fast paced natural movement, Plasma screens are still superior. They do not need to fabricate extra frames to eliminate motion judder, so the resulting effigy seen is not bogus or unnatural. There are pros and cons for both Plasma and LCD technology, and opinion will always be disunited one way or another, but if you prefer a smooth, natural picture – even altho LCD and LED technology has bettered immensely – a Plasma screen is still the way to go. Most helpful customer reviews 0 of 0 people found the following review helpful. 0 of 0 people found the following review helpful. 0 of 0 people found the following review helpful. I would steer clear. |
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