The present invention is embodied in a data compression encoder for use with the discrete cosine transform compression process. The invention enhances compression using the discrete cosine transform by utilizing a prediction engine that breaks the data received into predicted and unpredicted portions....http://www.google.com.hk/patents/US6697525?utm_source=gb-gplus-share專利 US6697525 - System method and apparatus for performing a transform on a digital image
