What is a video scaler?

Video scaler is a device that converts video signal resolution, resulting in a resolution of output that differs from the input. Although the output resolution can be done either higher or lower than the input signal, the video scaler is often used to improve video signals quality. For example, it can be used to increase a lower -resolution signal from a DVD player because it is transmitted to plasma TV with higher resolution. This low to high-resolution conversion is known as up-Converting or upscaling.

Each display video contains a firm number of pixels- small dots that make up the screen. The quality of the display - also known as resolution - is usually expressed in a picture that shows the number of pixels per lines multiplied by the number of rows, such as 1280 x 720 or 1024 x 768. Video signals and displays can have different resolution. If the input device resolution is significant, the scaler is required to be the output device so that without scale the image quality is distorted orendangered.

While video scares come in many shapes and sizes, they are usually classified as internal or external. Internal scareers often occur in devices such as TVs and computer screens; Videos scalers in these devices have the size of incoming video signals and create a detailed, high quality image for viewers. External scales most often have the shape of a hard housing that resembles a cable box. This type of scaler can be useful in the home cinema system or in the multimedia lecture hall, where video signals from devices such as game systems or camcorders need to be converted to view the large display.

With a wide range of models available in a range of price points, an external video scaler is usually an affordable option for most People. When buying a video scaler, it may be important for shoppers to note that no matter nAnd what resolution the scaler is able to transmit, the quality of the display cannot be improved beyond its highest inherent resolution. In other words, a video transmission transmitting signal at 2048 x 1080 to a 1280 x 720 resolution can result in a picture with a resolution no higher than 1280 x 720.