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This paper addresses the problem of efficient predictive lossless compression on the regions of interest (ROIs) in the hyperspectral images with no-data regions. We propose a two-stage prediction scheme, where a context-similarity-based weighted average prediction is followed by recursive least square filtering to decorrelate the hyperspectral images for compression. We then propose to apply separate...
A method of lossless compression of high dynamic range (HDR) images encoded in LogLuv32 format is presented. Simple bitplane coding (SBC) is independently applied to the components of LogLuv data. A context model for coding a bit is created by a comparison of neighboring pixel values, and is fed to a range coder. As a result, the average bit rate of 9.8 bits/pixel was obtained in lossless compression...
In this paper, a memory-efficient and low-complexity architecture is proposed for the scalable video encoder, achieving the requirement of the multi-source digital home environment. The proposed very-large-scale integration architecture of the scalable video encoder is implemented in TSMC 0.18-μm 1P6M CMOS technology. The proposed hardware is synthesized under 0.18-μm CMOS technology; resulting throughput...
We present a method for lossless compression of contours in images using a specific crack-edge representation, where each horizontal binary crack-edge is bundled together with a vertical binary crack-edge in a new symbol, having four possible values. One can represent all contours in an image using an auxiliary quaternary image, which has bundled at each pixel the value of the north and west crack-edges...
Wireless digital home environment is now a trend to remove the unnecessary wires between different entertainment devices. To serve the multiple client and multiple video source request, a new video compressor for loss less and near loss less compression is one of the major components achieving wireless mobile, multiple access home entertainment system. Among loss less compression system, JPEG 2000...
In this paper we study various chain codes, which are representations of binary image contours, in terms of their ability to compress in the best way the contour information using memory models. We consider five chain codes, including the widely used AF8 and 3OT codes, and note that they correspond to memory models of first and second order for contour representation. In order to provide predictive...
In this paper, a multiband loss less compression system exploiting inter-band data correlation is presented. We develop an adaptive prediction scheme that can dynamically switch among smooth, intra and intra-band prediction modes subject to the data correlation. Specifically, we use context information to determine the inter-band correlation between neighboring bands, and then borrow the wisdom of...
The paper describes two lossless coding tools employed in the new ITU-T G.711.0 Recommendation: fractional-bit and value-location encoding. Instead of encoding each sample individually as done in G.711, the fractional-bit coding tool identifies the total number of signal levels that exist within an input frame and then combines several samples for joint encoding with fractional-bits per sample. The...
In this paper, we propose an effective sequential lossless compression scheme which performs sequentially pixel by pixel in raster-scan order. The proposed method has three major components: a causal interpolation module, a fixed predictor and context based adaptive arithmetic coder. The causal interpolation module estimates the values of past pixels in the context which are the same color as current...
We present a novel coder for lossless compression of adaptive multiresolution meshes that exploits their special hierarchical structure. The heart of our method is a new progressive connectivity coder that can be combined with leading geometry encoding techniques. The compressor uses the parent/child relationships inherent to the hierarchical mesh. We use the rules that accord to the refinement scheme...
Some further studies on a hybrid test vector compression technique for VLSI circuits are presented in this paper. In the method proposed herein, the test vectors are first compacted in a hybrid fashion; next, these compressed test vectors are downloaded in the on-chip memory. The decompression software is also loaded in the memory along with test data. The decompression software then decodes the compressed...
A simple lossy-to-lossless bit-plane coding of still images is presented to integrate several functionality extension including selective tile partitioning, progressive transmission, ROI transmission, accuracy scalability, and others. The mean squared error between the original image and a decoded image at any progression level is known prior to encoding/decoding. The proposed bit-plane codec is competitive...
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