Patent ID: 7054366

Claim:
A decoder configured to reduce the volume of MPEG video data processed to display video images, comprising: means for processing one or more motion vectors in order to produce coordinates for fetching prediction data from a previously decoded and subsampled reference frame; means for processing the reference frame and the one or more motion vectors of MPEG data using a frame prediction module to generate predicted subsampled frame data; means for processing frequency coefficients of the MPEG data using an inverse discrete cosine transformer (IDCT) to generate IDCT output data; means for subsampling the IDCT output data by a selected factor to generate subsampled IDCT output data, wherein the means for subsampling the IDCT output data includes means for weighting color parameters of at least first and second spatial samples using at least first and second weighting factors, respectively, and summing the weighted color parameters of the at least first and second spatial samples to generate a color parameter of a subsample that corresponds to the at least first and second spatial samples; and means for summing the predicted subsampled frame data and the subsampled IDCT output data to generate video images encoded in a reduced volume of video data.