Results 261 to 270 of about 88,237 (307)
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IEEE Spectrum, 1970
The idea of coding the human voice into digital pulses was conceived more than three decades ago; exploitation had to await the ushering in of the transistor era. Since then, coding systems gradually have improved. One of the latest and most efficient schemes is delta modulation.
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The idea of coding the human voice into digital pulses was conceived more than three decades ago; exploitation had to await the ushering in of the transistor era. Since then, coding systems gradually have improved. One of the latest and most efficient schemes is delta modulation.
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Pulse-width modulation in sigma-delta modulators
Proceedings of 2010 IEEE International Symposium on Circuits and Systems, 2010Time-encoding machines map analog or multi-bit digital signals to a binary stream. The information contained in the input signal is preserved by the high resolution achieved in the time domain. Pulse-Width Modulators (PWMs) rely on a similar operation principle.
Francisco Colodro Ruiz +1 more
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Generalizations of \(\delta\)-lifting modules
2013Summary: In this paper we introduce the notions of \(G_1^*L\)-module and \(G_2^*L\)-module which are two proper generalizations of \(\delta\)-lifting modules. We give some characterizations and properties of these modules. We show that a \(G_2^*L\)-module decomposes into a semisimple submodule \(M_1\) and a submodule \(M_2\) of \(M\) such that every ...
Talebi, Yahya, Hosseinpour, Mehrab
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IETE Journal of Research, 1971
In this paper, design principles of a delta modulator are discussed to arrive at the design parameters. For a sampling rate of 25 K/bits and reference frequency of speech at 1·12 KHz, the maximum signal to quantization noise ratio is found to be around 24 db.
H. P. Jaiswal +2 more
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In this paper, design principles of a delta modulator are discussed to arrive at the design parameters. For a sampling rate of 25 K/bits and reference frequency of speech at 1·12 KHz, the maximum signal to quantization noise ratio is found to be around 24 db.
H. P. Jaiswal +2 more
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Delta Modulation of Data Signals
IEEE Transactions on Communications, 1974This paper is an analytical study to determine the performance of single-integration delta-modulation (\DeltaM) encoders with inputs which are various voice-band data signals. Signal-to-quantizing noise ratios S/N are calculated for \DeltaM bit rates from 16 to 96 K bits/s.
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Step Response of an Adaptive Delta Modulator
Bell System Technical Journal, 1976N. S. Jayant has proposed a simple but effective form of adaptive delta modulation which uses two positive parameters, P and Q, to adjust the step size. The values P = Q = 1 describe linear delta modulation (LDM), and Jayant has recommended using Q = 1/P and 1 1, it converges to the new level when PnQ < 1, and when PnQ = 1, it eventually settles into
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Single-Integration, Adaptive Delta Modulation
Bell System Technical Journal, 1975An estimate of optimum performance is derived for a single-integration, adaptive delta modulator. Several simulations of adaptive delta modulators with single integrators have all produced signal-to-noise ratios near or below the estimate. The derivations presented here indicate that the performance of a single-integration delta modulator is dependent ...
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Proceedings of the IEEE, 1967
This report describes the results of a study of Statistical Delta Modulation (SDM), a new method of digital transmission of analog information [1]. In this method the system design is tailored to the statistical properties of the input data so as to provide analog reconstruction values with a minimum mean squared error.
P.A. Bello, R.N. Lincoln, H. Gish
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This report describes the results of a study of Statistical Delta Modulation (SDM), a new method of digital transmission of analog information [1]. In this method the system design is tailored to the statistical properties of the input data so as to provide analog reconstruction values with a minimum mean squared error.
P.A. Bello, R.N. Lincoln, H. Gish
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A simple circuit for sigma-delta /delta modulation
International Symposium on Signals, Circuits and Systems, 2005. ISSCS 2005., 2006This article represents a simple circuit which can function either as sigma-delta or delta modulation. The circuit is composed of three OTAs, a capacitor and two resistors which basically form Schmitt-trigger circuit When input signal is present and fed to the inverting input node of OTA1, the circuit acts as a sigma-delta modulation.
P. Tuwanut +3 more
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