The Bt868/869 uses Conexant's UltraScaleTM technology to provide the most advanced vertical and horizontal scaling necessary for the display of non-interlaced data on interlaced devices such as the TV. The UltraScaleTM technology converts the lines of input pixel data to the appropriate number of output lines for producing a full-screen, high-quality image. The Bt868/869 performs 5-line vertical filtering, which includes poly phase interpolation scaling for overscan compensation and flicker filtering. Horizontal scaling for overscan compensation is achieved by altering the encoder clock frequency. This approach preserves all of the high frequency components of the input signals, which are essential for the highest quality display of text intensive images such as web pages on TVs. The amount of flicker filtering and overscan compensation is programmable.