real time processing or not

Real-Time Digital Signal Processing - Chapter 1: Introduction to Real-Time Digital Signal Processing

Ngày tải lên : 17/10/2013, 14:15

... arithmetic errors 1.1 Basic Elements of Real- Time DSP Systems There are two types of DSP applications ± non -real- time and real time Non -real- time signal processing involves manipulating signals ... been collected and digitized This may or may not represent a current action and the need for the result is not a function of real time Real- time signal processing places stringent demands on ... in digital form and /or the output data may not need to be converted to an analog signal For example, the processed digital information may be stored in computer memory for later use, or it may...

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Real-Time Digital Signal Processing - Chapter 2: Introduction to TMS320C55x Digital Signal Processor

Ngày tải lên : 19/10/2013, 23:15

... (.WORD) directive: The int (or word) directive places one or more 16-bit integer values into consecutive words in the current section This allows users to initialize memory with constants For ... space memory map as MATLAB and C are used in early development stages to verify and analyze the functionality of the algorithms Due to real- time constraints and /or memory limitations, part (or all) ... simulator (SIM), DSP starter kit (DSK), evaluation module (EVM), or in-circuit emulator (XDS) The CCS supports both C and assembly programs The C55x simulator is available for PC and workstations,...

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Real-Time Digital Signal Processing - Chapter 3: DSP Fundamentals and Implementation Considerations

Ngày tải lên : 19/10/2013, 23:15

... memory locations for xn and pxn For stationary signals, a larger L (longer window) or smaller a can be used for obtaining a better average However, a smaller L (shorter window) should be used for ... discrete -time system is time invariant (or shift invariant) if its input±output characteristics not change with time Otherwise this system is time varying A digital system with input signal xn is time ... infinite range of real- world frequency variable f (or V) into a finite range of discretetime frequency variable F (or !) The highest frequency in a digital signal is F 1=2 (or ! p) based on...

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Real-Time Digital Signal Processing - Chapter 4: Frequency Analysis

Ngày tải lên : 23/10/2013, 22:15

... z-Transform Continuous -time signals and systems are commonly analyzed using the Fourier transform and the Laplace transform (will be introduced in Chapter 6) For discrete -time systems, the transform ... z The method will not work for a sequence defined 137 THE Z-TRANSFORM in both positive and negative time In addition, it is difficult to obtain a closed-form solution of the time- domain signal ... of the vector table Because we not use boot.asm, we are responsible for setting up the system before we can begin to perform our experiment The stack pointer must be correctly set before any subroutine...

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Real-Time Digital Signal Processing - Chapter 5: Design and Implementation of FIR Filters

Ngày tải lên : 23/10/2013, 22:15

... instructions for experiments There are applications where data is already collected and stored for later processing, i.e., the processing is not done in real time In these cases, the `current' time n ... if the application does not require real- time signal processing For simulation purposes, it is convenient to use a powerful software package such as MATLAB for signal processing 222 DESIGN AND ... for smoothing estimated pitch in speech processing 5.2.4 Realization of FIR Filters An FIR filter can be realized to operate either on a block basis or a sample-by-sample basis In the block processing...

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Real-Time Digital Signal Processing - Chapter 6: Design and Implementation of IIR Filters

Ngày tải lên : 28/10/2013, 05:15

... Section 6.4, high-order IIR filters are often implemented in the form of cascade or parallel second-order sections for realtime applications For instance, the fourth-order Butterworth filter given ... application does not require real- time processing For computer software implementation, we describe the filter in the form of a set of I/O difference equations For example, a direct-form II realization ... this realization requires three memory locations to realize the second-order IIR filter, as opposed to six memory locations required for the directform I realization given in Figure 6.12 Therefore...

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Real-Time Digital Signal Processing - Chapter 7: Fast Fourier Transform and Its Applications

Ngày tải lên : 28/10/2013, 05:15

... the normalizing factor 1/N and the sign of the exponent of the twiddle factors The IDFT shows that there is no loss of information by transforming the spectrum X(k) back into the original time ... WN for kn > N: 7:2:1 kn For example, different powers of WN have the same value as shown in Figure 7.1 for N In addition, some twiddle factors have real or imaginary parts equal to or By ... algorithms for the case where N is a power of 2, the radix-2 FFT algorithm There are two classes of FFT algorithms: decimation-in -time and decimation-infrequency In the decimation-in -time algorithm,...

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Real-Time Digital Signal Processing - Chapter 8: Adaptive Filtering

Ngày tải lên : 06/11/2013, 18:15

... weight update Let Tp denote the total processing time for each input sample Real- time processing requires that Tp < T, where T is the sampling period This means that if the algorithm is too complicated, ... excess MSE Therefore the leakage effects must be incorporated into the design procedure for determining the required coefficient and internal data wordlength The leaky LMS algorithm not only prevents ... the MSE surface, or the performance surface For L 2, this corresponds to an error surface in a three-dimensional space The height of xn corresponds to the power of the error signal e(n) that...

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Real-Time Digital Signal Processing - Chapter 9: Practical DSP Applications in Communications

Ngày tải lên : 06/11/2013, 18:15

... telecommunication networks Such echoes are called line (or network) echoes If the time delay between the speech and the echo is short, the echo is not noticeable Distinct echoes are noticeable only ... XOR XOR x2 x1 XOR Figure 9.2 A 16-bit pseudo random number generator x 407 NOISE GENERATORS AND APPLICATIONS readily be accommodated by a single word on the many 16-bit DSP devices Thus memory ... frequency goes from f 0 fL at time n to f N À 1 fU at time n N À Because of the complexity of the linear chirp signal generator, it is more convenient for real- time applications to generate...

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Real-Time Digital Signal Processing

Ngày tải lên : 06/11/2013, 18:15

... any responsibility or liability for loss or damage occasioned to any person or property through using the material, instructions, methods or ideas contained herein, or acting or refraining from ... processors is very challenging work in today's engineering fields It promises an effective way to design, experiment, and implement a variety of signal processing algorithms for real- world applications ... development It becomes increasingly important for today's students and practicing engineers to master not only the theory of DSP, but equally important, the skill of real- time DSP system design and implementation...

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Tài liệu Real time digital signal processing P1 pptx

Ngày tải lên : 14/12/2013, 13:15

... arithmetic errors 1.1 Basic Elements of Real- Time DSP Systems There are two types of DSP applications ± non -real- time and real time Non -real- time signal processing involves manipulating signals ... been collected and digitized This may or may not represent a current action and the need for the result is not a function of real time Real- time signal processing places stringent demands on ... in digital form and /or the output data may not need to be converted to an analog signal For example, the processed digital information may be stored in computer memory for later use, or it may...

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Tài liệu Real time digital signal processing P3 ppt

Ngày tải lên : 24/12/2013, 01:16

... memory locations for xn and pxn For stationary signals, a larger L (longer window) or smaller a can be used for obtaining a better average However, a smaller L (shorter window) should be used for ... discrete -time system is time invariant (or shift invariant) if its input±output characteristics not change with time Otherwise this system is time varying A digital system with input signal xn is time ... infinite range of real- world frequency variable f (or V) into a finite range of discretetime frequency variable F (or !) The highest frequency in a digital signal is F 1=2 (or ! p) based on...

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Tài liệu Real time digital signal processing P4 docx

Ngày tải lên : 24/12/2013, 01:16

... z-Transform Continuous -time signals and systems are commonly analyzed using the Fourier transform and the Laplace transform (will be introduced in Chapter 6) For discrete -time systems, the transform ... z The method will not work for a sequence defined 137 THE Z-TRANSFORM in both positive and negative time In addition, it is difficult to obtain a closed-form solution of the time- domain signal ... of the vector table Because we not use boot.asm, we are responsible for setting up the system before we can begin to perform our experiment The stack pointer must be correctly set before any subroutine...

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Tài liệu Real time digital signal processing P5 docx

Ngày tải lên : 24/12/2013, 01:16

... instructions for experiments There are applications where data is already collected and stored for later processing, i.e., the processing is not done in real time In these cases, the `current' time n ... if the application does not require real- time signal processing For simulation purposes, it is convenient to use a powerful software package such as MATLAB for signal processing 222 DESIGN AND ... for smoothing estimated pitch in speech processing 5.2.4 Realization of FIR Filters An FIR filter can be realized to operate either on a block basis or a sample-by-sample basis In the block processing...

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Tài liệu Real Time Digital Signal Processing pptx

Ngày tải lên : 18/01/2014, 20:20

... arithmetic errors 1.1 Basic Elements of Real- Time DSP Systems There are two types of DSP applications ± non -real- time and real time Non -real- time signal processing involves manipulating signals ... been collected and digitized This may or may not represent a current action and the need for the result is not a function of real time Real- time signal processing places stringent demands on ... in digital form and /or the output data may not need to be converted to an analog signal For example, the processed digital information may be stored in computer memory for later use, or it may...

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Tài liệu Real time digital signal processing P8 doc

Ngày tải lên : 21/01/2014, 06:20

... weight update Let Tp denote the total processing time for each input sample Real- time processing requires that Tp < T, where T is the sampling period This means that if the algorithm is too complicated, ... excess MSE Therefore the leakage effects must be incorporated into the design procedure for determining the required coefficient and internal data wordlength The leaky LMS algorithm not only prevents ... the MSE surface, or the performance surface For L 2, this corresponds to an error surface in a three-dimensional space The height of xn corresponds to the power of the error signal e(n) that...

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Tài liệu Real time digital signal processing P9 doc

Ngày tải lên : 21/01/2014, 06:20

... telecommunication networks Such echoes are called line (or network) echoes If the time delay between the speech and the echo is short, the echo is not noticeable Distinct echoes are noticeable only ... XOR XOR x2 x1 XOR Figure 9.2 A 16-bit pseudo random number generator x 407 NOISE GENERATORS AND APPLICATIONS readily be accommodated by a single word on the many 16-bit DSP devices Thus memory ... frequency goes from f 0 fL at time n to f N À 1 fU at time n N À Because of the complexity of the linear chirp signal generator, it is more convenient for real- time applications to generate...

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