digital data digital signal conversion

Ngày tải lên: 29/09/2013, 20:20

... Digital Signal Source: The signal sources produce a series of “0”s (about –2.5 V) and “1”s (+2.5 V) at the data rate set by the Master Clock. The time period of each bit is T = 1/fs. This signal ... detection process. This signal is useful in accurately measuring errors in detected data due to a communications channel. Figure 5 A (b) Block parameters digital signal source Summer: ... signal source produces equally likely 0’s and 1’s. Figure 5 A (d) Block parameters limiter Error Detector: The processed signal is compared with a sample of the signal source. For each data...

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Ngày tải lên: 30/03/2014, 06:20

... taken: Chapter 28- Digital Signal Processors 513 Program Memory Data Memory instructions and secondary data data only Address PM Data Generator Address DM Data Generator Data Registers Muliplier ALU Shifter DM ... Chapter 28- Digital Signal Processors 511 Memory data and instructions Program Memory Data Memory instructions and secondary data data only Program Memory Data Memory instructions only data only a. ... Harvard Architecture ( ) CPU address bus data bus PM address bus PM data bus PM address bus PM data bus DM address bus DM data bus CPU DM address bus DM data bus single memory dual memory dual...

Ngày tải lên: 13/09/2012, 09:50

... 35 The Sampling Theorem 39 Digital- to-Analog Conversion 44 Analog Filters for Data Conversion 48 Selecting the Antialias Filter 55 Multirate Data Conversion 58 Single Bit Data Conversion 60 Chapter ... (Transform Compression) 494 MPEG 501 Chapter 28. Digital Signal Processors 503 How DSPs are different 503 Circular Buffering 506 Architecture of the Digital Signal Processor 509 Fixed versus Floating ... Probability and Noise 11 Signal and Graph Terminology 11 Mean and Standard Deviation 13 Signal vs. Underlying Process 17 The Histogram, Pmf and Pdf 19 The Normal Distribution 26 Digital Noise Generation...

Ngày tải lên: 13/09/2012, 10:21

... can be considered a bandlimited signal. It is this signal that is sampled and converted to a discrete-time signal and coded to a digital signal by the analog-to -digital converter (ADC) that was ... what are the advantages of digital signal processing instead of analog signal processing, even though digital signal processing requires more circuits compared to analog signal processing? x(n) y(n) z −1 z −1 z −1 ΣΣ Σ Σ Figure ... discrete-time signals are described. A brief history of analog and digital filter design is given. Then the advantages of digital signal processing over continuous-time (analog) signal pro- cessing...

Ngày tải lên: 13/09/2012, 10:21

... direct conversion versus indirect conversion. The successive approximation conversion, counter-based conversion, and parallel conversion use techniques to directly convert analog input signals ... analog signal. A simple example of such a conversion occurs in digital audio processing. Human voice is converted to a digital signal, modified, processed, and converted back to an analog signal ... to hear. The process to convert digital signals to analog signals is completed by a DAC. The most commonly used technique to convert digital signals to analog signals is the summation method...

Ngày tải lên: 29/09/2013, 20:20

... called the digital signal. Although there is a difference between the discrete-time signal and digital signal, in the next few chapters we assume that the signals are discrete-time signals and ... signals were con- verted to sampled data signals by these filters and the signal processing was treated as analog signal processing. But later, the signals were transitioned as discrete-time signals, ... theory of digital signal processing (DSP) and implementation of the theory by devices embedded in what are known as digital signal processors (DSPs). Of course, the theory of digital signal processing...

Ngày tải lên: 29/09/2013, 21:20

... abgetasteten Signal nur die Werte zu den Abtastzei- ten, gibt das Abtasttheorem Auskunft, ob alle Signalinformationen in den abgetasteten Werten enthalten sind oder nicht: Enthält ein Signal nur Signalanteile ... sind lediglich niedrigere Töne 66 Digital Signal Processing Kursteil 2: Abtasten und digitale Filtertechnik Nachdem wir in der letzten Folge das Abtasten von Signalen erklärt hatten, kommen wir ... Ausgangssignals anzusehen. Dazu muò man aber erst einmal die Mửglichkeit kennenlernen, Spektren von Signalen zu berechnen und zu betrachten. S PEKTRUMS -A NALYSER Was wäre ein Kurs über digitale...

Ngày tải lên: 16/10/2013, 01:15

... methods. 52.1.1 Signal Chain We assume a model where the input signal is properly bandlimited and digitized by an appropriate analog-to -digital converter. All subsequent processing in the encoder will be digital. ... The decoder is also digital up to the digital- to-analog converter, which is followed by a lowpass reconstruction filter. Under idealized conditions, the interconnection of the signal chain excluding ... encoded/decoded signal and the original signal. Usually, distortion is measured by a single number for a given coder and bit rate. There are numerous ways of mapping an error signal onto a single...

Ngày tải lên: 17/10/2013, 11:15

... func- tions on a fixed-point digital signal processor, IEEE Trans. Industr. Electron., 41, 70–78, Feb. 1994. [17] Ebert, P.M., Mazo, J.E. and Taylor, M.G., Overflow oscillations in digital filters, Bell ... Considerations Linear-phaseFIR digital filters can generally be implementedwith acceptablecoefficient quantization sensitivity using the direct convolution sum method. When implemented in this way on a digital signal ... second-order state-space digital filter structures, IEEE Trans. Circuits Syst. II, 39, 90–98, Feb. 1992. [3] Proakis, G.J. and Manolakis, D.J., Introduction to Digital Signal Processing, NewYork,...

Ngày tải lên: 17/10/2013, 11:15

... BruceW.Bomar Introduction ã NumberRepresentation ã Fixed-PointQuantizationErrors ã Floating-PointQuan- tizationErrors ã RoundoffNoise ã LimitCycles ã OverowOscillations ã CoefcientQuantization Error ã RealizationConsiderations T HESTUDYOFSIGNALSANDSYSTEMShasformedacornerstoneforthedevelopmentof digitalsignalprocessingandiscrucialforallofthetopicsdiscussedinthisHandbook.While thereaderisassumedtobefamiliarwiththebasicsofsignalsandsystems,asmallportionis reviewedinthischapterwithanemphasisonthetransitionfromcontinuoustimetodiscretetime. Thereaderwishingmorebackgroundmayndinitanyofthemanynetextbooksinthisarea,for example[1]-[6]. InthechapterFourierSeries,FourierTransforms,andtheDFTbyW.KennethJenkins,many importantFouriertransformconceptsincontinuousanddiscretetimearepresented.Thediscrete Fouriertransform(DFT),whichformsthebackboneofmoderndigitalsignalprocessingasitsmost commonsignalanalysistool,isalsodescribed,togetherwithanintroductiontothefastFourier transformalgorithms. InOrdinaryLinearDifferentialandDifferenceEquations,theauthor,B.P.Lathi,presentsa detailedtutorialofdifferentialanddifferenceequationsandtheirsolutions.Becausetheseequations arethemostcommonstructuresforbothimplementingandmodellingsystems,thisbackgroundis necessaryfortheunderstandingofmanyofthelatertopicsinthisHandbook.Ofparticularinterest areanumberofsolvedexamplesthatillustratethesolutionstotheseformulations. c 1999byCRCPressLLC ... 1986. [6] Oppenheim, A.V. and Schafer, R.W., Digital Signal Processing , Englewood Cliffs, NJ: Prentice- Hall, 1975. [7] Blahut, R.E., Fast Algorithms for Digital Signal Processing , Reading, MA: Addison-Wesley, 1985. [8] ... and Fractal Signal Processing 71 Chaotic Signals and Signal Processing Alan V. Oppenheim and Kevin M. Cuomo 72 Nonlinear Maps Steven H. Isabelle and Gregory W. Wornell 73 Fractal Signals Gregory...

Ngày tải lên: 17/10/2013, 12:15

... 1 Introduction to Real-Time Digital Signal Processing Signals can be divided into three categories ± continuous-time (analog) signals, discrete-time signals, and digital signals. The signals that we encounter ... signal to a xdigital signal is called analog-to -digital (A/D) conversion. An A/D converter (ADC) is usually used to perform the signal conversion. Once the input digital signal has been processed ... term `discrete-time' and `digital& apos; inter- changeably. Digital signal processing (DSP) is concerned with the digital representation of signals and the use of digital hardware to analyze,...

Ngày tải lên: 17/10/2013, 14:15

... de-interlacing of the signal. The implication of GST is that it is possible to perfectly reconstruct a signal sampled at 1/n times the Nyquist rate if n independent sets of samples describe the signal. The ... scanning format conversion is of a growing importance, despite many attempts to globally standardize video formats. 54.3 Problems with Linear Sampling Rate Conversion Applied to Video Signals High-quality ... Signals High-quality scanning format conversion is difficult to achieve, as the conditions of the sampling theorem are generally not met in video signals. The solution of Sample Rate Conversion (SRC) for systems...

Ngày tải lên: 19/10/2013, 18:15