digital signal analog data

Ngày tải lên: 09/12/2013, 16:15

... be 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 ... the 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

... 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 ... 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 ... 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

... (VLSI) technology. The analog 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 ... 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 ... output data decrease. For example, data on a few ADCs currently available are given in Table 1.3 [3]. Hence digital signal processing is restricted to approximately one megahertz, and analog signal...

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 muß man aber erst einmal die Möglichkeit 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

... Afifth-orderelliptic analoganti-aliasingfilterusedinthetelecommunications industry with an 8-kHz sampling rate. FIGURE 1.17: Analog pre- and postfilters required at the analog to digital and digital to analog interfaces. forms ... BruceW.Bomar Introduction • NumberRepresentation • Fixed-PointQuantizationErrors • Floating-PointQuan- tizationErrors • RoundoffNoise • LimitCycles • OverflowOscillations • CoefficientQuantization Error • RealizationConsiderations T HESTUDYOF“SIGNALSANDSYSTEMS”hasformedacornerstoneforthedevelopmentof digitalsignalprocessingandiscrucialforallofthetopicsdiscussedinthisHandbook.While thereaderisassumedtobefamiliarwiththebasicsofsignalsandsystems,asmallportionis reviewedinthischapterwithanemphasisonthetransitionfromcontinuoustimetodiscretetime. Thereaderwishingmorebackgroundmayfindinitanyofthemanyfinetextbooksinthisarea,for example[1]-[6]. Inthechapter“FourierSeries,FourierTransforms,andtheDFT”byW.KennethJenkins,many importantFouriertransformconceptsincontinuousanddiscretetimearepresented.Thediscrete Fouriertransform(DFT),whichformsthebackboneofmoderndigitalsignalprocessingasitsmost commonsignalanalysistool,isalsodescribed,togetherwithanintroductiontothefastFourier transformalgorithms. In“OrdinaryLinearDifferentialandDifferenceEquations”,theauthor,B.P.Lathi,presentsa detailedtutorialofdifferentialanddifferenceequationsandtheirsolutions.Becausetheseequations arethemostcommonstructuresforbothimplementingandmodellingsystems,thisbackgroundis necessaryfortheunderstandingofmanyofthelatertopicsinthisHandbook.Ofparticularinterest areanumberofsolvedexamplesthatillustratethesolutionstotheseformulations. c  1999byCRCPressLLC FIGURE1.1:CTmodelofasampledCTsignal. FIGURE1.2:DTmodelofasampledCTsignal. 1.2.1 ... 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]...

Ngày tải lên: 17/10/2013, 12:15

... STUDIO 19 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. In this section, we first discuss how to convert analog signals into digital signals so that they can be processed using DSP hardware. The process of changing an analog signal to a xdigital ... 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 ... Conversion Applied to Video 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 ... problem occurs at the signal acquisition stage. Since scenes do occur with almost unlimited spatial and/or temporal bandwidth, the sampling theo- rem requiresthat this signal be low-pass filtered...

Ngày tải lên: 19/10/2013, 18:15

... B.R., Digital Image Restoration, Prentice-Hall, Englewood Cliffs, NJ, 1977. [2] Gonzales, R.C. and Woods, R.E., Digital Image Processing, Addison-Wesley, MA, 1992. [3] Katsaggelos, A.K., Ed., Digital ... linear space-invariant image restoration, Multidim. Syst. and Signal Proc., 1(1), 143–177, 1990. [15] Rosenfeld, A. and Kak, A.C., Digital Picture Processing, Academic, New York, 1982. [16] Gennery, ... Proc., ASSP-37(4), 589–592, 1989. [59] Combettes, P.L. and Trussell, H.J., Methods for digital restoration of signals degraded by a stochastic impulse response, IEEE Trans. Acoust. Speech Sig. Proc., ASSP-37(3),...

Ngày tải lên: 19/10/2013, 18:15

... and hold is then applied to an analog- to -digital converter (A/D) circuit where the sampled analog signal is converted to a digitally coded signal. The digital signal is then applied to c  1999 ... to an analog signal by a digital- to -analog converter (D/A). A digital filtering application may produce an analog signal as its output, whereas a speech recognition system may pass the digital output ... basic elements of a digital signal processing system. The analog signal is first converted to a discrete time signal by a sample and hold circuit. The FIGURE 5.1: Digital signal processing system. output...

Ngày tải lên: 19/10/2013, 18:15

... many(inessence)continuoussignals in adigital fashion. This means that we do not deal with these signals directly, but only with sampled versions of it: we only retain the values of these signals at a discrete ... extraction of an SDTV signal from an HDTV signal is not simply a question of subsampling the HDTV signal; interpolation is needed to compute the values of the luminance signal at the missing ... luminance signal has to be sufficiently band limited. An often-used pass band region is given by the diamond in Fig. 4.3(c). An SDTV interlaced signal has half the vertical resolution of the HDTV signal, ...

Ngày tải lên: 19/10/2013, 18:15

... − 6t + 2t)e −2t =−2e −2t c  1999 by CRC Press LLC Recall that the exponential signal includes a large variety of signals, such as a constant (ζ = 0), a sinusoid (ζ =±jω), and an exponentially ... number of derivatives, this class of inputs includes a wide variety of the most commonly encountered signals in practice. Table 2.1 shows a variety of such inputs and the form of the particular solution...

Ngày tải lên: 19/10/2013, 20:15

Ngày tải lên: 19/10/2013, 23:15

Ngày tải lên: 19/10/2013, 23:15

Ngày tải lên: 23/10/2013, 16:15

Ngày tải lên: 23/10/2013, 16:15