Chul Soo Lee

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The current international standard, the Joint Bilevel Image Experts Group (JBIG), is a representative of a bilevel image compression algorithm. It compresses bilevel images with high performance, but it shows relatively low performance in compressing error-diffused halftone images. This paper proposes a new bilevel image compression for error-diffused(More)
In this work, we incorporate a multiresolutional coding functionality into the SPIHT algorithm [1]. The multiresolutional coding can be considered as a kind of the region of interest (ROI) coding with multiple regions of interest. Therefore, the ROI coding proposed by authors can be extended for the multiresolutional functionality without any cost in(More)
.4 programmable and scalable parallel architecture i s proposed for the real-time encoding/decoding of I-IDTV images and for nonlinear editing of the compressed video data. It only use!; the intra-mode compression/decompression so that nonlinear editing can be performed easily and high-quality images can be recovered. Spatially partitioned image data are(More)
The minimizations of the storage space and transmission time are the two most important riding factors in image compression for telemedicine. Keeping this in view this paper intend to focus on a comparative investigation of three near lossless image compression technique, NLIC (near lossless image compression), SPIHT with DWT (Discrete Wavelets Transform),(More)
A real-time encoding and decoding system (REDS) for HDTV that can be used for nonlinear HDTV editing in studio has been developed. The intrapicture coding of motion JPEG is implemented and optimized in the REDS so that a high-quality image can be recovered for the nonlinear editing. The REDS has a parallel architecture with multiple programmable digital(More)
The Pan-European Digital Satellite Video Broadcasting (DVB-S) system's performance is characterised. Various con gurations of blind equalisers and convolutional codecs operating at di erent code rates were investigated. The standard system's performance was improved upon replacing the conventional convolutional codec by a turbo codec. Lastly, the(More)
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