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 12 of 12 for “"PULSE CODE MODULATION"”.
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Pulse code modulation of digital communication system over two-wire lines
Digitized by Kansas Correctional Industries
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Pulse code modulation of digital communication system over two-wire lines
Digitized by Kansas Correctional Industries
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Structures and algorithms for two-dimensional adaptive signal processing
… processing include 2-D adaptive differential pulse code modulation, interference cancellation, predictive coding, and noise suppression. Emphasis is placed both on FIR and IIR structures with primary benchmark issues being speed of convergence, computational complexity, and structural …
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Pulse Time-Code Modulation System
In conventional systems of pulse-code modulation (PCM), the signal is sampled at a constant frequency, and pulse groups representing the signal amplitude are transmitted. The sampling frequency has to be related to the highest frequency in the signal; consequently, the sampling frequency is higher …
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A Digital System for Multiplex Speech Transmission
… economy compared with conventional PCM (Pulse Code Modulation) systems, while maintaining good voice quality. This is accomplished by using simple predictive techniques to remove redundant samples from the digitized speech signal. A computer aided study of conversational speech revealed …
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ADVANCED CMOS SINGLE-PHOTON IMAGER ARCHITECTURES FOR QUANTUM AND SCIENTIFIC IMAGING APPLICATIONS
… through a shot-noise-based Differential Pulse Code Modulation (DPCM) technique and cluster-level suppression, the architecture achieves compression ratios up to 96% while maintaining high image fidelity (PSNR 29 dB). Finally, two Flash-LiDAR sensor prototypes , namely Wallie64 and …
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Digital image transformation and compression
… Cosine Transform (DCT), quantiser, runlength coder and a statistical coder. The DCT is performed in hardware using the SGSThomson STV3200 Discrete Cosine Transform. The quantiser is specially optimised for use with high quality images. It utilises a non-uniform quantiser and is based on a …
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Mountain Pine Beetle Detection using IoT
… a modified version of an adaptive differential pulse-code modulation for sample encoding to reduce the size of the recorded samples and prepare them for transmission. As a result, 15 packets are required to transmit a single, compressed half-a-second sample. The transmitted samples are then …
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Pulse time-code modulation system
… of sampling. The new method has been called pulse time-code modulation (PTCM).The sampling in PTCM is achieved by dividing the full range of the signal amplitude into quantizing levels. When the signal crosses one of these levels the time measurement starts. It continues until another …
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Compressive sensing of images and video: towards low-complexity, real-time operation
… sensor-side CS video frame compression and decoder-side reconstruction techniques, the quantization and coding of image and video measurements for transmission, and the exploitation of temporal correlation between frames to improve performance. With respect to the compression of independent …
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Digital pulse interval modulation for optical communication systems
<p>Pulse time modulation (PTM) techniques have drawn considerable attention over the years as suitable schemes for transmission of information over optical fibres. PTM schemes are known to utilise the vast optical bandwidth to provide efficient transmission characteristics. Pulse code modulation is …
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ΜΕΘΟΔΟΙ ΜΕΤΑΤΡΟΠΩΝ ΚΩΔΙΚΑ ΔΙΑΜΟΡΦΩΣΗΣ ΔΕΛΤΑ ΓΙΑ ΤΗ ΒΕΛΤΙΩΣΗ ΚΑΙ ΑΠΛΟΥΣΤΕΥΣΗ ΤΗΣΕΠΕΞΕΡΓΑΣΙΑΣ ΣΗΜΑΤΩΝ
CONVERSION RATE AND CONVERSION CODE METHODS FOR DELTA MODULATED (DM) SEQUENCESARE PROPOSED IN THIS THESIS. WITH THE RATE CONVERSION METHOD A LINEAR DM (LDM) SEQUENCE CAN BE PROCESSED BY A DM SEQUENCES FILTER CLOCKED AT A HIGHER RATE THAN THAT OF THE INPUT SEQUENCE. THE FILTER OUTPUT IS A LDM …