Modern displays are fixed in resolution that requires source content to be scaled to its native resolution. As the source content may be NTSC (720 x 480 pixels), PAL (720 x 575 pixels), low HD (1280 x 720 pixels), full HD (1920 x 1080 pixels) or various resolutions of computer, camera, and internet content the image needs to be up or down scaled to typical display resolutions of 1366 x 768, or 1920 x 1080 pixels.

It’s also important to note that SD content may be of 4:3 or 16:9 aspect ratio, which requires the scaler to support difference horizontal and vertical scale factors. In some applications the 4:3 image may be stretched in a non-linear manner to fill a 16:9 display to avoid black borders.

To provide flexibility and optimum image quality, the HQV video processor incorporates an adaptive scaler that varies the number of filter taps and filter response with the scaling operation, whether it’s fixed or varying (non-linear).

The HQV video processor incorporates a single pass scaler and edge adaptive filtering for a more detailed and refined image. High image quality is obtained by fine sub-pixel positional accuracy and extended calculation precision to provide true 10 bit accurate results either in 4:4:4 mode or 4:2:2 mode. Poor scaler implementations can result in aliasing or striping artifacts.