Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 56 for “"Compression Algorithms"”.
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Hybrid dictionary/statistical text compression algorithms
… an exploration of hybrid dictionary/statistical algorithms for compressing textual information. The specific intent was to attempt to find an algorithm which would yield greater compression on text files than the algorithm PPMC without requiring significantly greater computing resources; PPMC is …
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The optimization of data compression algorithms
Thesis (Civ.E.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2000.
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Implementing video compression algorithms on reconfigurable devices
… popular choice for implementing a wide range of algorithms and complete systems. In this thesis the implementation of video compression algorithms on FPGAs is studied. Two areas are specifically focused on; the integration of a video encoder into a complete system and the power consumption of …
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Hybrid coding with enhanced RDC and Huffman compression algorithms
… modifications intended to significantly improve compression efficiency. Experimental analysis show the RDC algorithm produces compression efficiency at a comparable level to other well known encoders with exceptionally low CPU and memory requirements. This thesis purpose is to explore how to …
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An intelligent system for the classification and selection of novel and efficient lossless image compression algorithms
… increase in image size, the interest in image compression is increasing as well, to improve the storage size and transfer time. In this study, the researcher proposes two new lossless image compression algorithms. Both proposed algorithms focus on decreasing the image size by reducing the image …
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Stream programming for image and video compression
Video playback devices rely on compression algorithms to minimize storage, transmission bandwidth, and overall cost. Compression techniques have high realtime and sustained throughput requirements, and the end of CPU clock scaling means that parallel implementations for novel system architectures …
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Fast Parallel Algorithms for Universal Lossless Source Coding
The O(N/B) parallel compression algorithm estimates the MDL source among all tree sources whose maximal depth is log( N/B). This algorithm can be extended to parallel algorithms that support unbounded context depths. This will provide low redundancy performance over a much broader class of sources, …
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Towards generative compression
… or components fail. In the context of data compression, this translates to providing users with intelligible data, even in the presence of bandwidth bottlenecks and noisy channels. Traditional image and video compression algorithms rely on hand-crafted encoder/decoder pairs (codecs) that …
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Open-Source Parameterized Low-Latency Aggressive Hardware Compressor and Decompressor for Memory Compression
… with thousands of terabytes of DRAM. Memory compression has existed in all major operating systems for many years. However, while faster than swapping to a disk, memory decompression adds latency to data read operations. Companies and research groups have investigated hardware compression to …
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Techniques for the Development of Time-Constraint Telemetric Data Processing System
… research publications devoted to the lossless compression methods indicates growing interest to this area of the engineering design. This interest is explained by the rapid development of the communication and data storage facilities. Compression theory has a long history and the subject is …
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Source and Channel Coding of Images for Noisy Channels
… flexibility, even in terms of the underlying compression algorithms, as well as low complexity. Extensions of multiple description scalar quantizers in combination with erasure correcting codes are proposed as another method.
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Image Compression by Wavelet Transform.
… and transmission bandwidth. Efficient image compression solutions are becoming more critical with the recent growth of data intensive, multimedia-based web applications.</p> <p>This thesis studies image compression with wavelet transforms. As a necessary background, the basic concepts of …
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Compressed and dynamic fault dictionaries for fault isolation
… size and computation cost issues. Two new compression algorithms are presented. List Splitting creates fault dictionaries with a single full fault simulation and provides for rapidly estimating the diagnostic capabilities of a test set. Sequential compression makes no approximations for …
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Digitizing a Three-Dimensional Brain Atlas: Image Sequence Alignment and Volumetric Encoding
… The image post-processing and volume compression are other important components in atlas construction. The commonly existed Swiss-cheese type image defect is treated with wavelet-based method and long range correlation. An octree variant, scalable hyperspace file (SHSF), was developed …
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An investigation of observed Algorithmic Specified Complexity.
… value in AI applications, and while generic compression algorithms show some promise, the best way to measure ASC is by functionality.
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Kinect depth video compression for action recognition
… use of Kinect has created a need for effective compression algorithms. We present three compression schemes, all evaluated using a classification metric for human activity recognition. The first scheme uses the idea of companding to pre-process the data prior to compressing it with a standard …
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On lossless image compression
… between computers and remote terminals. Data compression is therefore very important to reduce the size of data files and the time needed to transfer between the remote terminals. A wide variety of compression techniques have been developed over past 20 years to reduce size of image files. …
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Practical algorithms for image compression and surface estimation
Practical Algorithms for Image Compression and Surface Estimation describes three algorithms for image compression and one algorithm for surface estimation that incorporates kriging and parametric cubic splines. Two of the image compression algorithms are innovative extensions of the Run Length …
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Loudness models for rehabilitative audiology
… hearing-impaired listener with different dynamic compression algorithms (chapter 2). In chapter 3 two methods (loudness matching and categorical loudness scaling) for assessing loudness perception are tested against each other. The reminder of the thesis is devoted towards modeling normal and …
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Energy-aware DNN Quantization for Processing-In-Memory Architecture
… from dedicated hardware platforms to model compression algorithms. Recently, hardware-aware quantization algorithms have shown further improvement in the energy efficiency of DNN by considering hardware architectures and algorithms together. In this work, a genetic algorithm-based …
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