There are a lot of these days the speech frame rates in the new HD television sets. The frame rate is simply the number of unique images on TV screen can be displayed in a second, the rate or "Hertz" is also known as the display. Hertz is the scientific equipment for cycles per second and is abbreviated "Hz". The latest buzzword is "120 Hz", i.e. a display rate of 120 fps. This is twice as fast as do most HDTVs (60 Hz) are able, so that it the moving images smoother look. But the human eye can only handle approximately 20 to 25 different frames per second, so why it can see important what is the frame rate as long as it faster than your eyes?
The answer comes when you realize that not all video with the same rate filmed wird.Filme are rotated with at 24 Hz, most filmed TV @ 30 Hz and some sports events are filmed now at 60 Hz.
Some simple math illustrates the problem and the solution to offenbaren.Wenn wants a TV 60 frames per second display and the cable TV company sends 30 frames per second that is easy to handle: the TV shows each frame twice in a row, creating an image consists of two consecutive frames. Each image is exactly 1 / 30 last one second on the screen, and the things looks perfectly smooth.
So what if your DVD Player sends 24 frames per second to the TV, but the TV still 60 on the screen to show happens? this is a bit slower than cable TV frame rate, so if it shows every frame twice and then waits for the next, a black gap between it and the movie will look horrible. So, have to triple the TV has a frame, double the next triple following and so on, overall there to show 60 frames per second. This is known as the 3: 2 pulldown.
The 3: 2 pulldown trick works OK, but it is a problem.Thumbnail takes a 20 seconds, then the next one takes 30th.Ein 20th of a second is long enough for most people to say that it really is a static image, and if the camera in a scene around pans, things seem erratic move.But if 120 FPS display can be your TV, it can take 24 Hz input and simply show each frame 5 times in a row for a total of 1 / 24 (or 5 / 120) second per frame, with no variation from frame to frame.And if 30 Hz video comes in, it shows every frame 4 times in a row, for a total of 1 / 30 (or 4 / 120) second per Frame.Problem solved.
Now, frame rates quickly enough to seamlessly display any kind of input are having dimensions HDTVs not only high resolution in the x and y (height and width), but also in t (time) - Dimension.Wie in all types of digital media higher resolution means smaller units of data, and that means that 120 Hz frame rate very frequently until 2008, but a few HDTVs have a more lifelike reproduction of Wirklichkeit.Die it, such as the Sony BRAVIA XBR4 - series and the Sharp AQUOS 92U series.
Entered HDTV certainly has the fourth dimension (time), but the third (depth) in the process skips hat.Bis we see, start see holographic movies on DVD, we have to wait until real four-dimensional TV.
About the author
Tom Webster writes an online guide to the HDTV revolution for FlatHDTV.net.
