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



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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.



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Xplore Articles related to Delta modulation

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Delta modulation in DVM design

D. J. G. Janssen IEEE Journal of Solid-State Circuits, 1972

Existing digital voltmeters (DVM) do not sell as well as analog types having parallel capabilities for the simple reason that they cost more. Though the DVM has the superior performance to compete in the popular class of instruments, it must sell for less than 100 dollars. This means new thinking and radical alteration in present designs. New thinking developed the ...


Exploiting Data Mining Techniques for Improving the Efficiency of a Supply Chain Management Agent

Andreas L. Symeonidis; Vivia Nikolaidou; Pericles A. Mitkas Web Intelligence and Intelligent Agent Technology Workshops, 2006. WI-IAT 2006 Workshops. 2006 IEEE/WIC/ACM International Conference on, 2006

Supply chain management (SCM) environments are often dynamic markets providing a plethora of information, either complete or incomplete. It is, therefore, evident that such environments demand intelligent solutions, which can perceive variations and act in order to achieve maximum revenue. To do so, they must also provide some sophisticated mechanism for exploiting the full potential of the environments they inhabit. ...


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

Amit Phadikar; Santi P. Maity; Malay K. Kundu Computer Vision, Graphics & Image Processing, 2008. ICVGIP '08. Sixth Indian Conference on, 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 ...


Rational dither modulation: a high-rate data-hiding method invariant to gain attacks

F. Perez-Gonzalez; C. Mosquera; M. Barni; A. Abrardo IEEE Transactions on Signal Processing, 2005

A novel quantization-based data-hiding method, called Rational Dither Modulation (RDM), is presented. This method retains most of the simplicity of the conventional dither modulation (DM) scheme, which is largely vulnerable to amplitude scalings and modifies it in such a way that the result becomes invariant to gain attacks. RDM is based on using a gain-invariant adaptive quantization step-size at both ...


A Two-port GFSK Direct Modulator for Wideband Applications at 5.8 GHz

Shayan Farahvash; Chee Quek; William Roberts; David Walker; Mohamed Mostafa; Hauw Liem; Robert Koupal 2007 IEEE International Symposium on Circuits and Systems, 2007

Wireless audio applications at 5.8GHz require a wide band GFSK modulator with small distortion and very low power consumption. The traditional open loop modulation technique is susceptible to pulling. More advance close loop modulation requires precise calibration to match gains of analog and digital predistortion paths. The authors demonstrate a direct GFSK modulator at 5.8GHz with low power consumption using ...


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Educational Resources on Delta modulation

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eLearning

Delta modulation in DVM design

D. J. G. Janssen IEEE Journal of Solid-State Circuits, 1972

Existing digital voltmeters (DVM) do not sell as well as analog types having parallel capabilities for the simple reason that they cost more. Though the DVM has the superior performance to compete in the popular class of instruments, it must sell for less than 100 dollars. This means new thinking and radical alteration in present designs. New thinking developed the ...


Exploiting Data Mining Techniques for Improving the Efficiency of a Supply Chain Management Agent

Andreas L. Symeonidis; Vivia Nikolaidou; Pericles A. Mitkas Web Intelligence and Intelligent Agent Technology Workshops, 2006. WI-IAT 2006 Workshops. 2006 IEEE/WIC/ACM International Conference on, 2006

Supply chain management (SCM) environments are often dynamic markets providing a plethora of information, either complete or incomplete. It is, therefore, evident that such environments demand intelligent solutions, which can perceive variations and act in order to achieve maximum revenue. To do so, they must also provide some sophisticated mechanism for exploiting the full potential of the environments they inhabit. ...


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

Amit Phadikar; Santi P. Maity; Malay K. Kundu Computer Vision, Graphics & Image Processing, 2008. ICVGIP '08. Sixth Indian Conference on, 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 ...


Rational dither modulation: a high-rate data-hiding method invariant to gain attacks

F. Perez-Gonzalez; C. Mosquera; M. Barni; A. Abrardo IEEE Transactions on Signal Processing, 2005

A novel quantization-based data-hiding method, called Rational Dither Modulation (RDM), is presented. This method retains most of the simplicity of the conventional dither modulation (DM) scheme, which is largely vulnerable to amplitude scalings and modifies it in such a way that the result becomes invariant to gain attacks. RDM is based on using a gain-invariant adaptive quantization step-size at both ...


A Two-port GFSK Direct Modulator for Wideband Applications at 5.8 GHz

Shayan Farahvash; Chee Quek; William Roberts; David Walker; Mohamed Mostafa; Hauw Liem; Robert Koupal 2007 IEEE International Symposium on Circuits and Systems, 2007

Wireless audio applications at 5.8GHz require a wide band GFSK modulator with small distortion and very low power consumption. The traditional open loop modulation technique is susceptible to pulling. More advance close loop modulation requires precise calibration to match gains of analog and digital predistortion paths. The authors demonstrate a direct GFSK modulator at 5.8GHz with low power consumption using ...


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  • A Novel Architecture Design for VLSI Implementation of an FIR Decimation Filter

    A novel architecture design of a one stage FIR filter for decimation is described. It performs the decimation of a 1-bit code at 1024KHz of double integration Sigma Delta modulation output to PCM at 16KHz. This architecture is designed in such a way that it needs only a simple control structure suitable for VLSI implementation. We devised an algorithm for generating the coefficients of the filter with a minimum of required hardware. It does not require storing the coefficients in a ROM and continuously reading it to calculate the convolution. The accumulators needed to perform the direct convolution are arranged in a way that simplifies and minimizes the hardware required for the filter implementation. The filter response is Sinc3(f) which provides sufficient attenuation for modulation generated by means of double integration. The implementation of this filter requires the generation of the coefficients and the performance of the convolution. Three coefficients are needed with every input to obtain the output sequence. The major feature of this architecture is the use of an efficient algorithm to obtain the coefficients thereby reducing the area and power consumption. It is very suitable for VLSI implementation in CMOS technology.

  • Quantization Noise Spectra

    Uniform qunntizers play a fundamental role in digital communication systems and have been the subject of extensive study for many decades, The inherent nonlinearity of quantizers makes their analysis hoth difficult and Interesting, It usually has been accomplished either by assuming the quantizer noise to be a signal-independent, uniform white random process or by replacing the quantizer by a deterministic linear device, or by combining the two assumptions. Such linearizing approximations simplify the analysis and permit the use of linear systems techniques, but few results exist quantifying how good such approximations are for specific systems, These complications are magnified when the quantizer is inside a feedback loop, as for Sigma-Delta modulators. Exact descriptions of the moments and spectra of quantizer noise have been developed recently for the special case of single-loop, multistage and multiloop Signul-Delta modulators. These results demonstrate. that the white noise and linearization assumptions can be quite poor approximations in some systems and quite good in others. It turns out that many of the techniques used in the analysis were first applied to the analysis of quantizers by Clavier, Panter, and Grieg (1947) in pioneering (but often overlooked) work that preceded Bennett's (1948) classic study of quantization noise spectra. We take advantage of the benefit of hindsight to develop several results describing the behavior of quantization noise in a unified and simplified manner. Exact formulas for quantizer noise spectra are developed and applied to a variety of systems and inputs, including scalar quantization (PCM), dithered PCM, Sigma-Delta modulation, dithered Sigma-Delta modulation, two-stage Sigma-Delta modulation, and second-order Sigma-Delta modulation.

  • 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 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.

  • 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

  • Constraints Analysis for Oversampling AtoD Converter Structures on VLSl Implementation

    Requirements, applied to analog components and characteristics for oversampling A-to-D converter structures with second order loop transfer function, were analyzed through numerical and mathematical analyses. The results suggest that a first order predictive encoder, with first order noise shaping, is best suited to high resolution future VLSl implementation. It is most difficult to achieve a theoretical second order ¿-¿ modulation signal- to-noise ratio, because of the amplifier performance requirements. The operational amplifier gain should only be greater than kR/n, as long as the amplifier response is linear, where R is the oversampling ratio, ¿ is the angular stop band frequency and k is a. parameter depending on structures and integrator circuit configuration, if a switched capacitor integrator is employed in a noise shaping technology. A second order delta modulation coder does not seem to be applicable to a precision converter, but to a high speed converter instead.

  • 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.

  • 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.

  • 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.



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