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 3353 for “"compression"”.
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Compression paraplegia
The subject of this Thesis is Compression Paraple -, gia, a term which I use in the generally accepted sense of all those conditions in which there is pressure upon the cord, whether a true motor paraplegia in the narrower sense of the word, that is paralysis of the lower limbs, is present or not.
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Digital image compression.
… is a serious demand for more efficient data compression schemes. compression schemes address themselves to speech, visual and alphanumeric coded data. This thesis is concerned with the compression of visual data given in the form of still or moving pictures. such data is highly correlated …
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Compression and cryptology
Currently data compression and encryption are carried out as two separate activities. A simpler communication system would result if these two activities could be combined. The security properties of lossless data compression techniques are investigated. It is argued that compression is necessary …
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Byte-select compression
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms
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Scalable video compression
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1992.
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Network functional compression
… we consider different aspects of the functional compression problem. In functional compression, the computation of a function (or, some functions) of sources is desired at the receiver(s). The rate region of this problem has been considered in the literature under certain restrictive assumptions. …
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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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Customized Data Compression: Automatically Synthesizing Effective Data Compression and Decompression Algorithms
… need for developing effective high-speed data compression techniques. However, developing an algorithm that just compresses data well is not sufficient. A good compression technique should also minimize the compression and decompression time. This project focuses on automatically synthesizing …
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Effect Of Impact Damage On Compression-Compression Fatigue Behavior Of Sandwich Composites
… effect of impact damage on in-plane buckling and compression-compression fatigue behavior for a new sandwich structure made from E-glass/epoxy face sheets over end-grain balsa wood core. Low velocity impact tests were carried out using a drop-weight impact tower by impacting the sandwich beam at …
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A model-adaptive universal data compression architecture with applications to image compression
… I designed and implemented a model-adaptive data compression system for the compression of image data. The system is a realization and extension of the Model-Quantizer-Code-Separation Architecture for universal data compression which uses Low-Density-Parity-Check Codes for encoding and …
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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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Small lesion detection with resolution enhancement compression: a method of coded excitation/pulse compression
… coded excitation method, resolution enhancement compression (REC), increases the axial resolution and the echo signal-to-noise ratio (eSNR) for an ultrasonic imaging system. The REC technique was examined for its ability to improve lesion detectability. In addition to lesion detectability, the …
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GPU Execution Tracing and Compression
Program tracing is widely used for debugging and performance optimization. Whenever a program is traced, the overhead in terms of extra runtime and in terms of storage for the generated trace information are a concern. These concerns are greatly exacerbated on GPUs due to the large amount of …
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Speech time expansion and compression
A new variable analog delay principle is used during playback, of pre-recorded speech, to maintain the original pitch when it is played back at half and at twice original recording speed. Original pitch is maintained in speeded up or slowed down speech by expanding or compressing in time, …
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Digital image transformation and compression
Compression algorithms have tended to cater only for high compression ratios at reasonable levels of quality. Little work has been done to find optimal compression methods for high quality images where no visual distortion is essential. The need for such algorithms is great, particularly for …
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Efficient compression of synthetic video
… effects of changing frame rate and resolution on compression efficiency and viewers‟ satisfaction are also presented. Results showed that the compression process and perceptual satisfaction are severely affected by the nature of the compressed sequence. As a result, H.264 showed higher compression …
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Group testing for image compression
… the application of group testing to image compression. Group testing is a technique used for identifying a few significant items out of a large set. Image compression studies techniques for making image data take up less storage space. We first explain the many interesting and deep …
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