Efficient motion compensation apparatus for digital video format down-conversion using generalized orthogonal transformation

An apparatus for performing efficient motion compensation and digital video format down-conversion using generalized orthogonal transformation, the apparatus comprising:

• a syntax parser and variable-length decoder that decodes a video bit stream and provides decoded motion parameters;
• a frame buffer that stores reconstructed low-resolution pictures and provides low-resolution reference pixels;
• an interpolator, using orthogonal transformation, that maps the low-resolution reference pixels from said frame buffer into a high-resolution space, based on at least one weighted transform coefficient, and provides interpolated pixels;
• an inverse motion compensator that performs half-pel motion compensation and provides high-resolution motion-compensated pixels, said inverse motion compensator receiving the interpolated pixels provided by said interpolator and the decoded motion parameters provided by said syntax parser and variable-length decoder, and
• a decimator, using orthogonal transformation that maps high-resolution motion-compensated pixels into a low-resolution space, based on at least one weighted transform coefficient, and provides decimated pixels.