A lossless/lossy unified transform image coding using lossless discrete cosine transform

摘要

The lossless (reversible) discrete cosine transform (DCT) is a very useful transform because it can realize easily an unified lossy/lossless image coding with a compatibility with conventional scheme such as MPEG and MPEG But on conventional transform coding based on lossless DCT, its compression performance at high-bit rate coding is poorer at high-bit rate coding and it can't ensure the quantity of the maximum error of recovered image. We propose a new transform coding based on lossless DCT in this report Proposed method can solve the problem in conventional method.