Evaluation of the Effect of Step Size on Delta Modulation for Photoplethysmogram Compression

Chong, K. S.; Zahedi, Edmond; Beng, Gan Kok; Ali, Mohd

doi:10.1016/j.protcy.2013.12.263

Cited by 9 publications

(2 citation statements)

References 9 publications

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“…The main idea behind this technique is encoding of the prediction error signal, that is, the difference between the original and predicted signal values using one-bit code words [1][2][3][4]. Owing to its attractiveness expressed by a relatively simple encoder/decoder structure and high level of compression, DM has also been applied successfully in many other research fields, such as compression of the hologram [5,6], electroencephalogram waveforms [7], photoplethysmogram signals [8], and data conversion for portable applications [9].…”

Section: Introductionmentioning

confidence: 99%

Algorithm based on 2‐bit adaptive delta modulation and fractional linear prediction for Gaussian source coding

Perić

Denic

Despotović

2021

IET Signal Processing

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A novel 2-bit adaptive delta modulation (ADM) algorithm is presented based on uniform scalar quantization and fractional linear prediction (FLP) for encoding the signals modelled by a Gaussian probability density function. The study focusses on two major areas: realization of a 2-bit adaptive quantizer based on Q-function approximation that significantly facilitates quantizer design; and implementation of a recently introduced FLP approach with the memory of two samples, which replaces the first-order linear prediction used in standard ADM algorithms and enables improved performance without increasing transmission costs. It furthermore represents the first implementation of FLP in signal encoding, therefore confirming its applicability in a real signal-processing scenario. Based on the performance analysis conducted on a real speech signal, the proposed ADM algorithm with FLP is demonstrated to outperform other 2-bit ADM baselines by a large margin for the gain in signal-to-noise ratio achieved over a wide dynamic range of input signals. The results of this research indicate that ADM with adaptive quantization based on Q-function approximation and adaptive FLP represents a promising solution for encoding/compression of correlated time-varying signals following the Gaussian distribution.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Introductionmentioning

confidence: 99%

Algorithm based on 2‐bit adaptive delta modulation and fractional linear prediction for Gaussian source coding

Perić

Denic

Despotović

2021

IET Signal Processing

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“…The Δ modulation systems, a type of variable structure control, are also getting a special interest in the control community [6]- [10]. Other recent studies on Δ modulators have been focused on multibit modulation, chaotic modulation, chaotification and tone suppression in communications [11]- [17]. The digital output of the Δ modulation systems can be encrypted by using chaotic systems.…”

Section: Introductionmentioning

confidence: 99%

Chaotic Encryption Based Data Transmission Using Delta and Delta-Sigma Modulators

Ablay¹

2016

International Journal of Applied Mathematics, Electronics and Computers

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Delta and Delta-Sigma modulation methods have been getting a great interest recently due to the great progress in analogdigital very large scale integration technology. Since the outputs of these methods are digital, the data can be securely encrypted using very simple standard hardware. In this work, a chaotic random bit generator based approach for encrypting digital data of the delta and delta-sigma modulators is studied. The chaotic bit generation can easily be implemented in the digital hardware of the modulators due to simplicity of the chaotic dynamics. The randomness of the generated chaotic bits are proved with visual and statistical tests. The security of the proposed approach is evaluated via key space estimation based attacks. The efficiency of the methods is validated with simulations.

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Adaptive Band Limit Estimation based PPG data compression for portable home monitors

2019

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Evaluation of the Effect of Step Size on Delta Modulation for Photoplethysmogram Compression

Cited by 9 publications

References 9 publications

Algorithm based on 2‐bit adaptive delta modulation and fractional linear prediction for Gaussian source coding

Algorithm based on 2‐bit adaptive delta modulation and fractional linear prediction for Gaussian source coding

Chaotic Encryption Based Data Transmission Using Delta and Delta-Sigma Modulators

Adaptive Band Limit Estimation based PPG data compression for portable home monitors

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