Digital Viewer System (LCD, Plasma TV) and Scaler

Overview of analog Viewer technology (TV/CRT monitor). Tube or CRT color/RGB only has 3 cathode (R, G, B). The function of the cathode electron-this is as a shooter or just call it a pencil that has the ends of 3 colors. While the front of the CRT is the canvas/paper image. Yoke (the Deflection Yoke) is a hand painted (because the electron deflector serves as a yoke). Means without yoke/hands, the tip of the pencil will dwell alone in the middle of the canvas so that the painted only 1 point rgb only.

PAL format video systems, speed painting is 25 fps (frames per second, i.e. one full canvas painted in time seper two five seconds or canvas is removed and then painted it back as much as 25 times every second. Early painting or movement can be progressive or interlace. Take the easiest course, starting from the top line of the left, then the right way to pencil (moving column) until most of the tip of a pencil, and then scroll to the bottom of the second row from the left-most column and then the road to the right until the end and beyond. When it came to the last column and last row, the canvas will be replaced new (emptied) along with the tip of the pencil's move to the line of the topmost point of the leftmost column/and so on to get 25 pictures per second [PAL format].

On the description above, the yoke will shift and painting horizontally, then vertically, therefore horizontal and vertical amplifier output is used to control yoke. When the synchronization is right, then the yoke will paint a picture correctly (coordinates are right, because the movement of the yoke in accordance with source images, synchronized).

On a TV projector, were equal to the CRT, the difference is the usage of a single CRT to one color. When RGB, then it took 3 separate CRT. The rays out of the three CRT are blended at the reflectors (or in front of the screen). TV projector is the solution to the CRT screen up to 100 inch, because it is not very effective when there is a whole RGB CRT 100 inch in size.

Depiction of the image on a CRT does not require digital data, pure analog signal-controlled synchronization and chrominance/colors in the video signal will be displayed. Remember, CVBS video signal is composite, that is to say in the video signal signal sync H + V and color signals (chroma). Or when observing the input plugs from the monitor signal would consist of R, G, B, H and V (the fifth when this signal is combined so one, then it could be a CVBS signal).

While the Digital Viewer System (like yg is applied in LCD TVs and Plasma), very much different with analog systems. That occur in the process of digital image appearance in summary as follows:

1. All analog signals will be processed first translated into digital data (ADC, analog to digital). Analogue signal e.g. video and audio, or even IF the signal output from the tuner. For example here is the picture/video signals because that will be reviewed here about digital video Viewer System.
2. The CPU will take samples then check the format and measuring how the resolution/size of the image contained in the digital data the results of the ADC. For example PAL 25 fps format is unreadable, it means the CPU will take 1 picture/frame (or image/data along the seperdualima second). Because PAL-formatted, then note the image size is 720 x 576 (720 x 576 lines of columns).
3. Then the CPU will set size (resize) image data taken last so that it corresponds to the size of the screen/panel. Tools/parts regulator size is called a SCALER. So, for example the LCD/Plasma panel used size is 1366x768 pixels, then the CPU will be commanded part of the Scaler to resize images from 720 x 576 pixels be 1366x768 pixels (so it is not surprising that some say the picture looks so short-short and plump-plump).
4. After image data completed in-resize, then the image data that is just right with the screen size/the panel further sent to the panel/screen to be displayed.
5. Process 1 to 4 above, on the PAL format, done within 1/25 seconds for 1 frame/picture, so in one second can process as many as 25 pictures/frames. Because of the above already explained that 1 pixel is equal to 1 bit, then the screen/panel will receive data of 1366x768 bits as much as 25 times every second. Which when together to around 25Mbps (25 megabitper-second), 25 fps PAL format.

The frames-per-second is a roll film theaters which screened and highlighted by a light that passes through the film dropped to the screen. 1 image in the film roll is 1 frame, 1 second for the duration of currently consists of 25 pictures "seems to be" all the same. There are also 30 images/sec or frame rate to another, for example to record a grenade explosion it takes the camera with the speed record up to 300 fps (300 frames per second), this means that the incidence of 1/300 seconds could recorded .

Digital Viewer System (LCD, Plasma TV) and Scaler 2016-04-30T04:28:00-07:00 Rating: 4.5 Diposkan Oleh: Unknown