A Study on Lossless Re-encoding of Multimedia Contents

在这项研究中，我们开发了一种无损重新编码技术，可以压缩现有的图像内容，而不会有任何额外的质量损失。基本算法主要针对JPEG和MPEG-1方案设计：这两种国际编码标准广泛用于图像和视频。结果，相对于已经压缩的图像数据，实现了10.30%的比特率节省。这项新技术使我们能够存档大量现有的图像内容，其效率可与最先进的编码方案相媲美。

In this study, we have developed a lossless re-encoding technique which can compress the existing image contents without any additional loss of quality. The basic algorithm was mainly designed for JPEG and MPEG-1 schemes : the international coding standards widely used for images and videos. As a result, 10.30% bit-rate savings are achieved against the already compressed image data. This new technology enables us to archive a large amount of the existing image contents with efficiency comparable to state-of-the-art coding schemes.