Patent ID: 7106797

Claim:
A method for decoding video or image information, the method comprising: receiving quantized transform coefficients for the video or image information being decoded; de-quantizing the received quantized transform coefficients into de-quantized transform coefficients for the video or image information being decoded; and applying an inverse transform process to the de-quantized transform coefficients for the video or image information being decoded, wherein the inverse transform process includes inverse transform calculations that produce results as given by the equations: u=A+C; v=A−C; y =( B>> 1) −D; z =( D>> 1) +B; a′=u+z; b′=v+y; c′=v−y; and d′=u−z; wherein A, B, C, and D) represent values to be inverse transformed, u, v, y, and z represent auxiliary variables, and a′, b′, c′, and d′ represent inverse transformed values.