Results 41 to 50 of about 1,421 (152)

Colored-Gaussian Multiple Descriptions: Spectral and Time-Domain Forms [PDF]

open access: yes, 2016
It is well known that Shannon's rate-distortion function (RDF) in the colored quadratic Gaussian (QG) case can be parametrized via a single Lagrangian variable (the "water level" in the reverse water filling solution).
Kochman, Yuval   +2 more
core   +2 more sources

Hybrid Color Image Compression based DPCM and Slant Transform

open access: yesمجلة النهرين للعلوم الهندسية, 2010
Nowadays, still images are used everywhere in the digital world. Images take lot of computer space, in many practical situations, all original images cannot be stored, and a compression must be used.
Ali Hussien mary
doaj  

Cipher-image compression by using compressive sensing and interweaving permutation

open access: yesJournal of King Saud University: Computer and Information Sciences
Recently, compressing cipher images by using compressive sensing (CS) has attracted a lot of attention. However, the previous CS-based works cannot provide satisfactory compression performance.
Bo Zhang   +4 more
doaj   +1 more source

Compression-Based Complexity Analysis of Thalamic EEG Using Multiscale Preprocessing Techniques

open access: yesIEEE Access
Quantifying the complexity of biomedical signals offers critical insight into underlying physiological and pathological dynamics. This study systematically evaluates compression-based complexity measures—Effort-to-Compress (ETC) and Lempel-Ziv ...
Poornima Mohan   +4 more
doaj   +1 more source

Spatially Directional Predictive Coding for Block-based Compressive Sensing of Natural Images

open access: yes, 2014
A novel coding strategy for block-based compressive sens-ing named spatially directional predictive coding (SDPC) is proposed, which efficiently utilizes the intrinsic spatial cor-relation of natural images.
Jiang, Feng, Zhang, Jian, Zhao, Debin
core   +1 more source

Virtually Lossless Compression of Astrophysical Images

open access: yesEURASIP Journal on Advances in Signal Processing, 2005
We describe an image compression strategy potentially capable of preserving the scientific quality of astrophysical data, simultaneously allowing a consistent bandwidth reduction to be achieved.
Alparone Luciano   +3 more
doaj   +1 more source

The Effect of Channel Errors in the Differential Pulse-Code-Modulation Transmission of Sampled Imagery [PDF]

open access: yes, 1971
This Paper Presents an Analysis, Simulation, and Discussion of the Effects of Communication Errors on Four-Bit Differential Pulse-Code Modulation (DPCM) Sampled Imagery.
Arguello, Roger J.   +2 more
core   +2 more sources

Recursively indexed differential pulse code modulation [PDF]

open access: yes
The performance of a differential pulse code modulation (DPCM) system with a recursively indexed quantizer (RIQ) under various conditions, with first order Gauss-Markov and Laplace-Markov sources as inputs, is studied.
Na, Sangsin, Sayood, Khalid
core   +1 more source

A study of data coding technology developments in the 1980-1985 time frame, volume 2 [PDF]

open access: yes
The source parameters of digitized analog data are discussed. Different data compression schemes are outlined and analysis of their implementation are presented.
Ingels, F. M., Shahsavari, M. M.
core   +1 more source

PSNR Improvement Using Different Prediction Coding

open access: yesTikrit Journal of Engineering Sciences, 2015
Differential Pulse Code Modulation (DPCM) is one of the predictive coding techniques. The number of previous pixels employed in the estimate operation is referred to as the order of the predictor. Predictor using one pixel for estimation is called “first
Khamies Khalaf Hasan
doaj  

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