Delta modulation

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Delta modulation (DM or Δ-modulation)is an analog-to-digital and digital-to-analog signal conversion technique used for transmission of voice information where quality is not of primary importance. DM is the simplest form of differential pulse-code modulation where the difference between successive samples is encoded into n-bit data streams. (Wikipedia.org)






Conferences related to Delta modulation

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2013 9th International Conference on Information, Communications & Signal Processing (ICICS)

The conference provides an opportunity for researchers around the world to exchange ideas and latest research results in areas such as multimedia systems, information systems, signal processing, communications, networking and related fields.


2008 IEEE Power Electronics Specialists Conference - PESC 2008

  • 2007 IEEE Power Electronics Specialists Conference - PESC 2007



Periodicals related to Delta modulation

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Consumer Electronics, IEEE Transactions on

The design and manufacture of consumer electronics products, components, and related activities, particularly those used for entertainment, leisure, and educational purposes


Display Technology, Journal of

This publication covers the theory, design, fabrication, manufacturing and application of information displays and aspects of display technology that emphasize the progress in device engineering, device design, materials, electronics, physics and reliabilityaspects of displays and the application of displays.


Electron Devices, IEEE Transactions on

Publishes original and significant contributions relating to the theory, design, performance and reliability of electron devices, including optoelectronics devices, nanoscale devices, solid-state devices, integrated electronic devices, energy sources, power devices, displays, sensors, electro-mechanical devices, quantum devices and electron tubes.


Industrial Electronics, IEEE Transactions on

Theory and applications of industrial electronics and control instrumentation science and engineering, including microprocessor control systems, high-power controls, process control, programmable controllers, numerical and program control systems, flow meters, and identification systems.


Industry Applications, IEEE Transactions on

The development and application of electric systems, apparatus, devices, and controls to the processes and equipment of industry and commerce; the promotion of safe, reliable, and economic installations; the encouragement of energy conservation; the creation of voluntary engineering standards and recommended practices.



Most published Xplore authors for Delta modulation

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Xplore Articles related to Delta modulation

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Quantization Based Data Hiding Scheme for Efficient Quality Access Control of Images Using DWT via Lifting

Amit Phadikar; Santi P. Maity; Malay K. Kundu 2008 Sixth Indian Conference on Computer Vision, Graphics & Image Processing, 2008

This paper proposes a transform domain data-hiding scheme for quality access control of images. The original image is decomposed into tiles by applying n-level lifting-based discrete wavelet transformation (DWT). A binary watermark image (external information) is spatially dispersed using the sequence of number generated by a secret key. The encoded watermark bits are then embedded into all DWT-coefficients of nth-level ...


Decimation filter design for RSFQ ΣΔ converter

M. Slimani; R. Guelaz; P. Desgreys; P. Loumeau 2009 Joint IEEE North-East Workshop on Circuits and Systems and TAISA Conference, 2009

In order to develop superconducting over-sampled AD converter, based on a band pass sigma delta modulator, we study a sinc decimation filter using top-down method: Matlab simulations are performed to determine filter specifications, VHDL behavioral model of the complete architecture (sigma delta AD converter, I/Q mixer and low pass decimation filter) is realized to validate decimation filter performance and finally ...


Distributed algorithms for biobjective assignment problems

Chendong Li; Chulwoo Park; Krishna R. Pattipati; David L. Kleinman 2011 50th IEEE Conference on Decision and Control and European Control Conference, 2011

In this paper, we study the biobjective assignment problem, a NP-hard version of the classical assignment problem. We employ an effective two-phase method with certain enhancements: in Phase I, we use a distributed auction algorithm to solve the single objective assignment problems to obtain the so-called supported Pareto optimal solutions; we apply a ranking approach with tight upper/lower bounds in ...


A fast SNR estimation method for sigma-delta modulator design

Jiandong Cheng; Guoyong Shi; Ailin Zhang 2013 IEEE International Conference of IEEE Region 10 (TENCON 2013), 2013

This paper presents a fast symbolic method for computation of the signal-to- noise ratio (SNR) of switched-capacitor sigma-delta modulators. The key idea is to use a Taylor expansion polynomial to approximate the rational expression of a noise transfer function (NTF). This new method can be used in automatic optimization tools developed for switched-capacitor sigma-delta modulator design.


A Survey of the State of the Art in Data Mining and Integration Query Languages

Sabri Pllana; Ivan Janciak; Peter Brezany; Alexander Wohrer 2011 14th International Conference on Network-Based Information Systems, 2011

The major aim of this survey is to identify the strengths and weaknesses of a representative set of Data-Mining and Integration (DMI) query languages. We describe a set of properties of DMI-related languages that we use for a systematic evaluation of these languages. In addition, we introduce a scoring system that we use to quantify our opinion on how well ...


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Educational Resources on Delta modulation

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eLearning

Quantization Based Data Hiding Scheme for Efficient Quality Access Control of Images Using DWT via Lifting

Amit Phadikar; Santi P. Maity; Malay K. Kundu 2008 Sixth Indian Conference on Computer Vision, Graphics & Image Processing, 2008

This paper proposes a transform domain data-hiding scheme for quality access control of images. The original image is decomposed into tiles by applying n-level lifting-based discrete wavelet transformation (DWT). A binary watermark image (external information) is spatially dispersed using the sequence of number generated by a secret key. The encoded watermark bits are then embedded into all DWT-coefficients of nth-level ...


Decimation filter design for RSFQ ΣΔ converter

M. Slimani; R. Guelaz; P. Desgreys; P. Loumeau 2009 Joint IEEE North-East Workshop on Circuits and Systems and TAISA Conference, 2009

In order to develop superconducting over-sampled AD converter, based on a band pass sigma delta modulator, we study a sinc decimation filter using top-down method: Matlab simulations are performed to determine filter specifications, VHDL behavioral model of the complete architecture (sigma delta AD converter, I/Q mixer and low pass decimation filter) is realized to validate decimation filter performance and finally ...


Distributed algorithms for biobjective assignment problems

Chendong Li; Chulwoo Park; Krishna R. Pattipati; David L. Kleinman 2011 50th IEEE Conference on Decision and Control and European Control Conference, 2011

In this paper, we study the biobjective assignment problem, a NP-hard version of the classical assignment problem. We employ an effective two-phase method with certain enhancements: in Phase I, we use a distributed auction algorithm to solve the single objective assignment problems to obtain the so-called supported Pareto optimal solutions; we apply a ranking approach with tight upper/lower bounds in ...


A fast SNR estimation method for sigma-delta modulator design

Jiandong Cheng; Guoyong Shi; Ailin Zhang 2013 IEEE International Conference of IEEE Region 10 (TENCON 2013), 2013

This paper presents a fast symbolic method for computation of the signal-to- noise ratio (SNR) of switched-capacitor sigma-delta modulators. The key idea is to use a Taylor expansion polynomial to approximate the rational expression of a noise transfer function (NTF). This new method can be used in automatic optimization tools developed for switched-capacitor sigma-delta modulator design.


A Survey of the State of the Art in Data Mining and Integration Query Languages

Sabri Pllana; Ivan Janciak; Peter Brezany; Alexander Wohrer 2011 14th International Conference on Network-Based Information Systems, 2011

The major aim of this survey is to identify the strengths and weaknesses of a representative set of Data-Mining and Integration (DMI) query languages. We describe a set of properties of DMI-related languages that we use for a systematic evaluation of these languages. In addition, we introduce a scoring system that we use to quantify our opinion on how well ...


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IEEE-USA E-Books

  • The Structure of Quantization Noise from SigmaDelta Modulation

    When the sampling rate of a sigma-delta modulator far exceeds the frequencies of the input signal. its modulation noise is highly correlated with the amplitude of the input. We derive simple algebraic expressions for this noise and its spectrum in terms of the input amplitude. The results agree with measurements taken on a breadboard circuit. This work can be useful for designing oversarnpled analog to digital converters that use sigma-delta modulation for the primary conversion.

  • A Use of Double Integration in Sigma Delta Modulation

    Sigma delta modulation is viewed as a technique that employs integration and feedback to move quantization noise out of baseband. This technique may he iterated by placing feedback loop around feedback loop, but when three or more loops are used the circuit can latch into undesirable overloading modes. In the desired mode, a simple linear theory gives a good description of the modulation even when the quantization has only two levels. A modulator that employs double integration and two-level quantization is easy to implement and is tolerant of parameter variation. At sampling rates of 1 MHz it provides resolution equivalent to 16 bit PCM for voiceband signals. Digital filters that are suitable for converting the modulation to PCM are also described.

  • Multistage SigmaDelta Modulation

    We provide a theoretical basis for multistage sigma-delta modulation (MSM), which is a cascade realization of several single-loop sigma-delta modulators with a linear combinatorial network. Equations are derived describing the output and the quantization noise of MSM for an arbitrary input signal and the noise shaping characteristic of MSM is investigated. The spectral characteristics of an _m_-stage sigma-delta modulator with both dc and sinusoidal inputs are developed. For both types of inputs the binary quantizer noise of the _m_th (_m_ ¿ 3) sigma-delta quantizer, which appears at the output as an _m_th order difference, is asymptotically white, uniformly distributed, and uncorrelated with the input level. It is also found that for an _m_-stage sigma-delta quantizer with either an ideal low-pass filter or a sinc _m_ + 1 filter decoder, the average quantization noise of the system is inversely proportional to the (2_m_, + 1)th power of the oversampling ratio _R_. This implies that high-order systems are favorable in terms of the trade- off between the quantization noise and the oversampling ratio. Simulation results are presented to support the theoretical analysis.

  • Multirate Filter Designs Using Comb Filters

    Decimation is an important component of oversampled analog-to-dlgital conversion. It transforms the digitally modulated signal from short words occurring at high sampling rate to longer words at the Nyquist rate. Here we are concerned with the initial stage of decimation, where the word rate decreases to about four times the Nyquist rate. We show that digital filters comprising cascades of integrate-and-dump functions can match the structure of the noise from sigma delta modulation to provide decimation with negligible loss of signal-to-noise ratio. Explicit formulas evaluate particular tradeoffs between modulation rate, signal-to-noise ratio, length of digital words, and complexity of the modulating and decimating functions.

  • An Approach to the Implementation of Digital Filters

    An approach to the implementation of digital filters is presented that employs a small set of relatively simple digital circuits in a highly regular and modular configuration, well suited to LSI construction. Using parallel processing and serial, two's-complement arithmetic, the required arithmetic circuits (adders and multipliers ) are quite simple, as are the remaining circuits, which consist of shift registers for delay and small read-only memories for coefficient storage. The arithmetic circuits are readily multiplexed to process multiple data inputs or to effect multiple, but different, filters (or both), thus providing for efficient hardware utilization. Up to 100 filter sections can be multiplexed in audio-frequency applications using presently available digital circuits in the medium-speed range. The filters are also easily modified to realize a wide range of filter forms, transfer functions, multiplexing schemes, and round-off noise levels by changing only the contents of the read-only memory and/or the timing signals and the length of the shift-register delays. A simple analog-to-digital converter, which uses delta modulation as an intermediate encoding process is also presented for audio-frequency applications.

  • A SecondOrder HighResolution Incremental A/D Converter with Offset and Charge Injection Compensation

    Sigma-delta modulation, associated with oversampling and noise shaping, is a well-known technique used in high-accuracy A/D converters. Such converters, required in telecommunications applications, are characterized by ac perfonnance such as signal-to-noise ratio. Moreover, they are mainly dedicated to applications which can tolerate offset and gain errors. On the other hand, measurement and instrumentation applications require absolute accuracy, e.g., offset and gain errors cannot be tolerated. These applications are characterized by dc perfonnance such as differential and integral nonlinearides, offset and gain errors, and they often require high resolution. The second-order incremental A/D converter, which makes use of sigma-delta modulation associated with a simple digital filter, is capable of achieving such requirements. Experimental results, obtained of circuits fabricated in a SACMOS 3-¿m technology, indicate that 15-bit absolute accuracy is easily achievable, even with a low reference voltage.

  • Oversampled SigmaDelta Modulation

    Oversampled sigma-delta modulation has been proposed as a practical implementation for high rate analog-to-digital conversion because of its simplicity and its robustness against circuit imperfections. To date, mathematical developments of the basic properties of such systems have been based either on simplified continuous-time approximate models or on linearized discrete-time models where the quantizer is replaced by an additive white uniform noise source. In this paper. we rigorously derive several basic properties of a simple discrete-time single integrator loop sigma-delta modulator with an accumulate-and-dump demodulator. The derivation does not require any assumptions on the correlation or distribution of the quantizer error, and hence involves no linearization of the nonlinear system, but it does show that when the input is constant, the state sequence of the integrator in the encoder loop can be modeled exactly as a linear system in an appropriate space. Two basic properties are developed: 1) the behavior of the sigma-delta quantizer when driven by a constant input and its relation to uniform quantization, and 2) the rate-distortion tradeoffs between the oversampling ratio and the average mean-squared quantization error.

  • Fully Controlled Three-Phase Bridge Converters

    This chapter discusses the operation of a three‐phase fully controlled bridge converter. It is shown that by suitable control, this device can be used to achieve either a three‐phase controllable voltage source or a three‐phase controllable current source. The chapter presents a refinement of six‐step operation. In particular, one of several pulse‐width modulation (PWM) control strategies that allows the amplitude of the fundamental component of the voltage to be readily controlled is discussed. Six‐step modulation, extended sine‐triangle modulation, and space‐vector modulation are all voltage‐source modulation schemes. The chapter explains usage of these schemes to develop an open‐loop voltage‐regulated converter. Hysteresis modulation and delta modulation are both current source‐based schemes. These are used as the basis of developing an open‐loop current‐regulated converter. Finally, the chapter focuses on closed‐loop methods of regulating q‐ and d‐axis voltages and currents.

  • AnalogDigital Conversion

    This chapter contains sections titled: A Self-Calibrating 15 Bit CMOS A/D Converter A Ratio-Independent Algorithmic Analog-to-Digital Conversion Technique A Per-Channel A/D Converter Having 15-Segment µ-255 Companding A Use of Double Integration in Sigma Delta Modulation MOS ADC-Filter Combination That Does Not Require Precision Analog Components A Voiceband 15b Interpolative Converter Chip Set A 12-bit Sigma-Delta Analog-to-Digital Converter with a 15-MHz Clock Rate An 8-bit High-Speed CMOS A/D Converter An 8-MHz CMOS Subranging 8-Bit A/D Converter A Pipelined 5-Msample/s 9-bit Analog-to-Digital Converter

  • Fully Controlled 3Phase Bridge Converters

    This chapter contains sections titled: Introduction The 3-Phase Bridge Converter 180° Voltage Source Operation Pulse-Width Modulation Sine-Triangle Modulation Third-Harmonic Injection Space-Vector Modulation Hysteresis Modulation Delta Modulation Open-Loop Voltage and Current Control Closed-Loop Voltage and Current Controls References Problems



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