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 TitleDate AddedCompany
whitepaper A Novel Visual Perceptual Model With an Application to Hi-Fidelity Image Annotation2006-04-08 Microsoft
  This paper introduces a novel visual perception model that aims to quantify the localized tolerance to noise for arbitrary imagery. The model is built by mixing the outputs from an entropy and a differential localized standard deviation filter. The mixture is then low-pass filtered and normalized to provide a model that produces substantially better perceptual hi-fidelity than existing tools of similar complexity. Although there exist numerous applications for the new model, from compression to medical imaging and denoising, the authors demonstrate its efficacy using an image annotation application. The objective is to embed 32 bits of meta-data into a single image in a way that is robust to aggressive JPEG compression and cropping.

Tags: Software Engineering, Data Visualization		   
whitepaper Reading Compressed Text Files Using SAS Software2006-12-26 01:00:57 SAS Institute
  External raw data files continuously needed at work are every day more and greater. Normally, those files come in any of the more popular compressed formats like zip, 7zip, gzip and rar. A common practice is to previously decompress files and next, read them with SAS. Taking advantage of the PIPE device of the FILENAME statement and the aid of some tools free to use, one can directly read compressed data without extracting them first. This paper shows different ways to read compressed data, considering several formats and software tools used to produce archives. Open code software will be used to access compressed data as well as a special dynamic library of the SAS Software.   
whitepaper Distributed Data Aggregation in Sensor Networks by Regression Based Compression2005-08-27 University of Cincinnati
  This paper proposes a method for data compression and its subsequent regeneration using a polynomial regression technique. The approximate data received over the considered area by fitting it to a function and communicate this by passing only the coefficients that describe the function. This paper extends the previous algorithm TREG to consider non-complete aggregation trees. The proposed algorithm DUMMYREG is run at each parent node and uses information present in the existing child to construct a complete binary tree. In addition to obtaining values in regions devoid of sensor nodes and reducing communication overhead, this new approach further reduces the error when the readings are regenerated at the sink.

Tags: Network Security, Mobile - Wireless Communications		   
whitepaper Communication Strategies and Coding for Relaying2006-12-13 01:00:24 Alcatel-Lucent
  Information-theoretic models for relaying are developed and applied to wireline and wireless networks. For wireline networks with node constraints, data compression is shown to improve rates. For wireless networks with half-duplex constraints, decode-and-forward strategies are developed that can give substantial rate gains over no-relay transmission and traditional multihopping. The performance of the strategies is verified by designing coded modulations that approach certain information-theoretic limits. The codes used are irregular Low-Density Parity-Check (LDPC) codes.   
whitepaper Compression Algorithm Testing - Making Things Smaller: An analysis of Data Compression Algorithms20040402000410 Quantum
  This White paper describes the results of testing the data compression algorithms of Super Tape Drives. The testing requirements were to compare the data compression algorithm performance of the SDLT 320 manufactured by Quantum against the Linear Tape Open (L.T.O.) drives from HP, IBM, and Seagate and the Advanced Intelligent Tape drive from Sony.   
whitepaper How Does Compression Work20040302121617 MacKiDo
  Many people don't understand compression -- how do you make something smaller? In some ways you don't -- you just encode the data in a more efficient way. This article will explain a few basic types and concepts about data storage and compression. These concepts are far simpler than people realize -- it's just the implementation details can be a pain.
Basically, compression on computers is achieved by looking for commonality (in shape or pattern), and then saving the description of that shape or pattern (using tables or mathematical algorithms) instead of saving the whole image itself. If you don't get it, read on, and it may become more clear. 		  
whitepaper Advanced MPEG-2 Encoding20040302121606 Harmonic
  This white paper introduces the advanced MPEG-2 encoding techniques featured on the standard definition DiviCom™ MV50 encoder from Harmonic. This sixth-generation encoder supersedes the market-leading MV45 encoder, adding extra processing power, new filters and intelligent controls to consistently deliver the highest quality video in satellite, broadcast, and xDSL networks, where bandwidth efficiency matters most.   
whitepaper Management Strategy for Network Critical Physical Infrastructure2003-01-01 American Power Conversion (APC)
  When choosing a management solution for the physical infrastructure of IT networks, management of individual devices is necessary in order to have visibility to the many data points required for the reliable operation of network-critical physical infrastructure (NCPI). Element management solutions offer the optimum approach as they manage a particular type of device and have the ability to assimilate and, more importantly, make manageable the large volume of data necessary for network availability. Download this white paper from APC for important information on developing your NCPI management strategy.   

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