What is Line Doubler?

Doubler lines is a device that deinterlaces video signals. This includes the conversion of the interlaced video source into progressive scanning. This can be done in two main ways, with different results.

The interlaced video source is the one where each new frame updates only half of the pixels lines. Alternative lines are updated for each new image: in fact, odd -numbered rows with one frame and an even number with another are updated. This system has been developed as an effective way to reduce the information to be saved and transmitted using a video signal. It works because the frames are updated somewhere in the range of 25 to 30 times per second depending on the transmission system. This means that the human eye usually cannot detect the fact that not all pixels lines change at once. Plasma and LCD screen instead use progressive scanning, which means that the whole image is updated at once. When such screens play the interlaced source, the mismatch may cause vidImmediate shortcomings in the picture known as artifacts. This means that a form of deinterlacing is required for any shot and is transmitted in an interlaced form that includes most non-HD shots and some forms of HD shots.

One way to achieve this is Doubler. It can exist as a separate device, but is commonly built into both DVD players designed for use with progressive scanning video displays and TV files themselves. It is possible to display the interlaced signals without a double dual or other method of deinterlacing, but the results would be bad. They can also be particularly remarkable on larger screens that are more common with plasma and LCD technology.

The simplest form of the doubleble line simply works so that refreshments are in each new frame and then repeat them immediately below the previous line that has not been restored in the new image. It means that kaThe new framework creates a brand new image, unlike the interlaced format. The main disadvantage is that due to the repetition, the amount of details in the picture is effectively half and the image is likely to be visibly less sharp.

The more advanced form of the line doubler will use digital interpolation. In fact, it creates a new framework by taking lines that have been restored, and then artificially creating the content for the lines between them. As a generalized and simplified explanation of this process, if the specific pixel to be created falls above and below the renewed pixels of the same color, the pixel will also be created. If the pixels above and bottom are different, the content of the pixel created will take into account other surrounding pixels.

Many video display devices today have a replaced line Doubleler with video scaler. This performs the same deinterlacing function, but can also scalance the video source to match the screen resolution than it is used for the original source. This is more important today because ODHD razovky comes in different resolutions, while CRT screens in old style tend to have the same number of pixels, with larger screens simply each pixel larger. Because the video scaler contains a deinterlacer, the use of a separate double line would be redundant.