JPEG transcompressor and Internet applications

In this paper we design a novel transcoding algorithm to transcode and compress a JPEG or MPEG bitstream to a fully embedded one. Due to the efficiency of multigrid embedded (MGE) coding used to code non-zero quantized DCT coefficients, it actually compresses JPEG or MPEG bitstreams from 9% to 30%. This "transcompression" method has many applications for the Internet and multimedia networks. Since most "original" images or video files stored on computers around the world are in JPEG or MPEG formats, our algorithm provides a simple and efficient way to redistribute pictures/video files across the Internet.