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 17 of 17 for “"efficient coding"”.
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Efficient coding of natural sounds
Es werden Methoden für eine effiziente Kodierung natürlicher Töne vorgeschlagen, die auf dem Konzept der "spärlichen Kodierung" basieren, ein Hauptmechanismus in der neurosensorischen Informationsverarbeitung. Eine verbesserte Audioqualität, insbesondere bei niedrigen Bitraten, wurde in dem …
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Efficient coding/decoding strategies for channels with memory
… schemes suffer long delay in decoding. Others are very sensitive to random errors in the guard space. Most of these schemes are not adaptive to channel conditions. In this thesis, two new schemes are proposed to overcome these drawbacks. The proposed schemes are analyzed over a …
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Channel-and-circuits aware, energy-efficient coding for high speed links
… the thesis shows that it may be possible to use coding techniques to share the burden of combating errors, while increasing the throughput of the link or improving its energy-efficiency. Since codes here attempt to alleviate the impact of partially correlated sources of error (like reflections …
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Energy-efficient coding and modulation methods for interference suppression in wireless sensor network systems
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2002.
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Sensory representations optimized for the natural environment
… available to the visual system must be allocated efficiently to support its function. To achieve this, our brain needs to take advantage of the statistical regularities of our visual environment. In this thesis, I systematically explore how different aspects of natural stimulus statistics can …
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Image data compression using multiple bases representation
… years, there has been a lot of research into the efficient coding of gray scale images. Vector quantization (Va) methods have been successfully applied to the efficient coding of images. These methods, however, are computationally intensive. Full search Multiple Bases Representation (MBR) is …
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Efficient signal, code, and receiver designs for MIMO communication systems
… of a determinant criterion. We further develop efficient coding schemes using long error correction codes. In particular, we combine them with tilted-QAM codes using hard and soft decision decoding to obtain good performance at moderate SNR. These new systems are compared to orthogonal …
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Neural Encoding of Prior Experience in Sensorimotor Behavior
… the theory of predictive processing in terms of efficient coding principles that govern the response properties of neurons. The major contribution of this thesis is to bridge these two levels of description. Using a series of time-intervalreproduction tasks in rhesus macaques, I first establish a …
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Theoretical Principles for Information-Efficient Reasoning under Uncertainty
… to multiple combinations of information-efficient inference and error-aware control. Our findings generalize efficient coding ideas in neuroscience, extend the principle of minimal intervention in control, and offer valuable insights that, combined with advancements in low-power hardware, …
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Content-prioritised video coding for British Sign Language communication.
… which must compress video image data for efficient transmission. Current video compression schemes apply methods to reduce statistical redundancy and perceptual irrelevance in video image data based on a general model of Human Visual System (HVS) sensitivities. This thesis presents novel …
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Call Combinatoriality in Birds
… and whether such relationships reflect efficient coding under production and perceptual constraints, remains largely untested at the comparative level. This thesis addresses both challenges across two complementary studies. First, using the white-browed babbler (Pomatostomus …
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Spatially Coupled Sparse Regression Codes for Single- and Multi-user Communications
… codes (SPARCs) are a class of channel codes for efficient communication over the single-user additive white Gaussian noise (AWGN) channel at rates approaching the channel capacity. In a standard SPARC, codewords are sparse linear combinations of columns of an i.i.d. Gaussian design matrix, and …
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Improving the energy efficiency and reliability of wireless sensor networks using coding techniques
… these two challenges, this thesis proposes new coding schemes and communication protocols, a novel paradigm for information acquisition, and the design and implementation of specific, circuits architectures. The reliability and energy efficiency trade-offs of splitting the inserted redundancy in …
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Efficient Neural Coding Under Resource Constraints: A Rate-Distortion Theory Perspective
L'abstract è presente nell'allegato / the abstract is in the attachment
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A Computational Neuroscience Approach to Higher-Order Texture Perception
… studies. Based on Pearson's correlation and coefficients of repeatability, mTurk is capable of producing data of comparable quality to laboratory studies. This is significant as mTurk has not previously been systematically evaluated for visual psychometric research. In Chapter 4, we employed a …
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A Computational Neuroscience Approach to Higher-Order Texture Perception
… studies. Based on Pearson's correlation and coefficients of repeatability, mTurk is capable of producing data of comparable quality to laboratory studies. This is significant as mTurk has not previously been systematically evaluated for visual psychometric research. In Chapter 4, we employed a …
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The mechanisms of reliable coding in mouse visual cortex
… guide behavior. The ability of neurons to efficiently convey information is, however, limited by intrinsic and shared variability. Despite this limitation, neurons in primary visual cortex (V1) are able to respond with high fidelity to relevant stimuli. My thesis proposes that high fidelity …