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Topic: Digital signal processing


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In the News (Mon 20 Nov 17)

  
  Digital Signal Processing Hearing Aids
The fitting process requires the use of a fairly large soundproof room (such as is found at The Hearing and Speech Center) to adjust the circuitry to the user's ear and to the exact hearing aid shape.
The signals from the two microphones are processed in the dsp chip to enhance the sounds coming from the front.
The digital signal processor chip operates at 150 million operations per second and is followed by an all-digital output stage to drive the output transducer (loud speaker) directly.
www.hearingcenter.com /info_files/digitha.html   (1957 words)

  
 Digital Signal Processing: News, Tech Articles, App Notes
Digital Signal Processing: News, Tech Articles, App Notes
Digital signal processing encompasses all technologies, products and techniques that convert signals from sources into digital data that can then be analyzed.
Your use of this website is subject to, and constitutes acknowledgement and acceptance of our Terms of Use.
www.eetasia.com /CAT_499489_digital-signal-processing.HTM   (255 words)

  
  Digital Signal Processing
Filtering out sinusoidal components of the digital signal that occur at frequencies that cannot be produced by the music itself results in recording the music with little wind and rain noise.
If the digital signal is an electronic measurement of a brain wave obtained by using probes applied externally to the head, other electronic signals are picked up by the probes, but the physician may be interested only in signals occurring at a particular frequency.
Digital signal processing entails anything that can be done to a signal using coding on a computer or DSP chip.
www.tradeways.org /dsp.php   (266 words)

  
  Digital signal processing - Wikipedia, the free encyclopedia
Digital signal processing (DSP) is the study of signals in a digital representation and the processing methods of these signals.
DSP and analog signal processing are subfields of signal processing.
Since the goal of DSP is usually to measure or filter continuous real-world analog signals, the first step is usually to convert the signal from an analog to a digital form, by using an analog to digital converter.
en.wikipedia.org /wiki/Digital_signal_processing   (1390 words)

  
 Digital signal processing Info - Encyclopedia WikiWhat.com   (Site not responding. Last check: )
A digital signal is often a numerical representation of a continuous signal.
The continuous signal is usually sampled at regular intervals and the value of the continuous signal in that interval is represented by a discrete value.
Typical applications of digital signal processing are, for example, speech compression and transmission in (digital) mobile phones, equalisation of sound in Hifi-equipment, weather forecasting and economic forecasting, analysis and control of industrial processes, computer-generated animations in movies and image manipulation.
www.wikiwhat.com /encyclopedia/d/di/digital_signal_processing.html   (857 words)

  
 Digital signal processor - Wikipedia, the free encyclopedia
A digital signal processor (DSP) is a specialized microprocessor designed specifically for digital signal processing, generally in real-time.
The first DSP produced by Texas Instruments (TI), the TMS32010 presented in 1983, proved to be an even bigger success, and TI is now the market leader in general purpose DSPs.
Most DSPs use fixed-point arithmetic, because in real world signal processing, the additional range provided by floating point is not needed, and there is a large speed benefit; however, floating point DSPs are common for scientific and other applications where additional range or precision may be required.
en.wikipedia.org /wiki/Digital_signal_processor   (577 words)

  
 Digital Signal Processing Tutorial
DSP stands for Digital Signal Processing - the basis of many areas of technology, from mobile phones to modems and multimedia PCs.
DSP is traditionally a highly mathematical subject, and the standard DSP textbooks contain a lot of mathematical exposition.
Prosig provide free Signal Processing tutorials which are available to view free online and to download as PDF files.
www.dsptutor.freeuk.com   (410 words)

  
 Digital Signal Processing Hearing Aids
Today, digital technology has been applied to hearing aids in two distinct formats: Digitally programmable analog signal-processing (ASP) instruments and digitally programmable digital signal processing (DSP) Digital encoding in the latter technology is proving to be an economical and versatile method of manipulating and performing all sorts of electronic functions.
A digital signal processing hearing aid operates in a fundamentally different manner from an analog hearing aid or a digitally programmable analog signal processing hearing aid, but - and this is crucial - the output from a DSP aid is still amplified acoustic energy.
By converting ongoing speech signals to binary electrical impulses, it is possible to manipulate them through a digital signal processor (just as in a computer) in ways that cannot be accomplished with analog hearing aids.
www.hearingresearch.org /Dr.Ross/Digital_Signal_Processing_HAs.htm   (2164 words)

  
 RLE :: Digital Signal Processing Group
The Digital Signal Processing Group in the MIT Research Laboratory of Electronics focuses on developing general methods for signal processing that can be applied to a wide range of applications.
In the general area of signal processing algorithms, we have been investigating several areas of mathematics such as geometric algebras and frame theory with the goal of developing new classes of algorithms with broad application.
An important trend in signal processing technology is the increasing deployment of distributed signal processing systems; i.e., systems in which signal measurement, storage and processing capacity are separated by a communication network.
www.rle.mit.edu /dspg/research.html   (883 words)

  
 Digital Signal Processing - Cambridge University Press
Usually in the VLSI implementation of a digital signal processing system the concern is to reduce power consumption and/or area, or to increase the circuit's speed in order to meet the demands of high-throughput applications.
Digital signal processing is the discipline that studies the rules governing the behavior of discrete signals, as well as the systems used to process them.
The power of digital signal processing comes from the fact that, once a sequence of numbers is available to appropriate digital hardware we can carry out any form of numerical processing on them.
www.cup.cam.ac.uk /aus/catalogue/catalogue.asp?isbn=0511074646&ss=exc   (2373 words)

  
 Analog Devices: Analog Dialogue: Digital Signal Processing 101­ An introductory course in DSP system design: Part 1
Having heard a lot about digital signal processing (DSP) technology, you may have wanted to find out what can be done with DSP, investigate why DSP is preferred to analog circuitry for many types of operations, and discover how to learn enough to design your own DSP system.
When acting as a digital filter, for example, the DSP receives digital values based on samples of a signal, calculates the results of a filter function operating on these values, and provides digital values that represent the filter output; it can also provide system control signals based on properties of these values.
Processing occurs on the entire frame of data and results in a frame of transformed data, as shown in Figure 7.
www.analog.com /library/analogDialogue/archives/31-1/DSP.html   (2849 words)

  
 FDI DSP - Digital Signal Processing - Design Guide
DSP represents a subset of signal-processing activities that utilize A/D converters to turn analog signals into streams of digital data.
When fixed-point processing is used, additional noise and distortion may be added during the filtering process because the filter consists of large numbers of multiplications and additions, which produce errors, creating truncation noise.
Digital Filters are used primarily when transfer-function requirements have no counterpart in the analog world, or when a DSP already resides on the circuit board to perform other functions.
www.freqdev.com /guide/dspguide.html   (3338 words)

  
 DNA-Based Digital Signal Processing
Digital Signal Processing could largely benefit from a DNA based approach since there is a vast amount of information to be processed, which usually requires a lot of computational effort.
A number of applications in signal and image processing require determining the similarity of either two signals or segments of the two signals, as expressed by the shifts required for one signal to match the other.
As stated previously, one of the key characteristics of the digital signal-matching problem, is the fact that the matches are typically imprecise, due to the nature of the problem (e.g., photographs of the same scene from different perspectives or with different lighting conditions) or the presence of noise in the data.
ivpl.ece.northwestern.edu /Research/Current/DNAdsp/DNAdsp.html   (1786 words)

  
 Open Directory - Science: Technology: Electronics: Signal Processing: Digital Signal Processing - DSP
Digital Signal Processing Research Group UCD - The principal research areas of the DSP group at University College Dublin are algorithms for biomedical and audio-visual signal processing.
European Association for Signal, Speech and Image Processing - EURASIP aims to improve communication between groups and individuals that work within the field of Signal Processing in Europe and elsewhere, and to exchange and disseminate information in the field all over the world.
Signal Processing using C++ (SPUC) - A collection of efficient and reusable DSP building block objects (for digital communications simulation) written in C++.
dmoz.org /Science/Technology/Electronics/Signal_Processing/Digital_Signal_Processing_-_DSP   (1966 words)

  
 Amazon.ca: Understanding Digital Signal Processing: Books: Richard G. Lyons   (Site not responding. Last check: )
Although mathematics is necessary to describe digital signal processing, I’ve tried to avoid overwhelming the reader with math because a recipe for technical writing that’s too rich in equations is hard for the beginner to digest.
DSP simulation software allows the beginner to verify signal processing theory through the time-tested trial and error process.
Chapter 3 is devoted to one of the foremost topics in digital signal processing, the discrete Fourier transform (DFT) used for spectrum analysis.
www.amazon.ca /Understanding-Digital-Signal-Processing-Richard/dp/0131089897   (3539 words)

  
 Digital Grabber - Grab Life by the Digital Horns - How Digital Signal Processing Works   (Site not responding. Last check: )
Indeed, the naming used is rather improper, because it relates to all types of digital processing, only that the methods, and the techniques used in DSP deal only with signals that are analog in nature.
This means that we need to convert the analog signal to digital format, and the best way of doing it is by using DSP techniques, as follows.
This is done gradually, by chopping digital data into frames of 512, 1024, or 4096 integers in size, and transforming one frame at a time.
www.digitalgrabber.com /guides/how_digital_signal_processing_works.html   (493 words)

  
 Digital Signal Processing
Digital Signal Processing (DSP), one of the hottest new fields in embedded design, has emerged as a very important technology for modern electronic systems.
DSP is often considered to be the workhorse of choice for many computational-intensive applications.
This program is designed for individuals involved in the evaluation, design or development of systems employing digital signal processing, or as an introduction to DSP technology.
unex.uci.edu /certificates/engineering/digital_signal   (190 words)

  
 TAPR Digital Signal Processing
Digitial Voice Digital voice is voice (analog) communications that has been digitized (analog to digital) and transmitted digitally over radio using a modem.
DSP Book References A comprehensive lists of books and references for the amateur radio experimenter wanting to learn more about Digital Signal Processing.
DSP Presentations Listen to talks and presenations on DSP from TAPR conferences.
www.tapr.org /dsp   (689 words)

  
 Digital Signal Processing
The act of sampling an analog signal into the digital domain, and applying processing on the digital version using computing algorithms, and possibly restoring the signal into the analog domain after processing, is called digital signal processing.
The conclusion was that the TMS320C31 DSP would be the best chocie of DSP for the project, that the C3x DSK kit should be purchased to do development and testing of the code, and that the C3x GCC port should be used for compiling the MPEG-audio C-code.
In the case of MPEG-Audio decoding, digital compressed data is fed into the DSP which performs the decoding, then the decoded samples have to be converted back into the analog domain, and the resulting signal fed into an amplifier or similar audio equipment.
www.sparta.lu.se /~bjorn/whitney/dsp.htm   (1316 words)

  
 Brushing up on DSP basics | Digital Signal Processing basics
The origins of signal processing were in electrical engineering, and a signal back then referred to an electrical signal carried by a wire or telephone line, or perhaps by a radio wave.
Digital signal: Any signal that is quantized (i.e., limited to a distinct set of values) into digital words at discrete points in time.
And, as the speed of DSP technology continues to increase, digital filters are being applied to high-frequency signals in the RF domain, which, in the past was the exclusive preserve of analog technology.
svconline.com /audioplayback/features/avinstall_abcs_dsp   (4430 words)

  
 Digital Signal Processing (DSP) - CANBERRA, An AREVA Group Company
With traditional analog spectrometer systems, the detector signal is processed, shaped and filtered by the shaping amplifier and digitized by the ADC at the very end of the processing chain.
The digitized or sampled data is then filtered and optimized using digital processing algorithms.
The resultant digitally processed data is transferred to the MCA histogram memory for analysis and view.
www.canberra.com /products/651.asp   (227 words)

  
 Digital Signal Processing Books
Digital Signal Processing Fundamentals introduces the important mathematical processes and then providing several application-specific tutorials for practicing the techniques learned.
It develops a generic processing structure that takes advantage of the similarities that exist among radar, sonar, and medical imaging systems and integrates conventional and nonlinear processing schemes.
The 20 chapters summarize the application of advanced processing concepts and point out their applicability, benefits, and potential; disseminate the results of research funded by government and military agencies; develop a general concept for implementing adaptive, synthetic aperture processing schemes; and more.
www.embedded.com /books/books_DSP.htm   (602 words)

  
 ePanorama.net - Links
Digital Signal Processors have approximately the same level ofintegration, the same clock frequencies as general purposemicroprocessors.
DSP Boards: A Buyer's Guide - Fortunately, it's not necessary for a designer to start from scratch when dealing with complex DSP chips, an essential component for many communication systems- thanks to an array of preconfigured and customizable DSP boards and related software.
DSPs for next-generation cell phones balance performance and power - DSP vendors are fighting the battle on several fronts for high-performance, low-power operation and offering scalable architectures and optimized instruction sets.
www.epanorama.net /links/dsp.html   (2908 words)

  
 Digital Signal Processing
The creation of this DSP University Research Fund is the latest in a series of actions to widen the company's lead in digital signal processing solutions.
New uses for DSPs, such as digital TV, are being developed at a rapid pace by electronics designers in industry and in university research labs around the world.
The worldwide market for digital signal processors and related mixed-signal/analog chips is projected to grow more than 10 times to about $50 billion over the next ten years.
www.drblank.com /codsp.htm   (829 words)

  
 Amazon.com: Digital Signal Processing (2nd Edition): Books: Emmanuel Ifeachor,Barrie Jervis   (Site not responding. Last check: )
In academia, DSP is generally regarded as one of the more mathematical topics in the electrical engineering curriculum, and based on our experiences of teaching we have reduces the mathematical content to what we consider useful, essential, and interesting; we have also emphasized points of difficulty.
A number of DSP techniques which are of particular relevance to industry are also covered and in a few years, we believe, these will find their way into undergraduate curricula.
It additionally covers a number of DSP techniques, such as adaptive filtering and multirate processing, which are of particular relevance to those in industry or undertaking advanced studies.
www.amazon.com /Digital-Signal-Processing-Emmanuel-Ifeachor/dp/0201596199   (2603 words)

  
 Xcell Journal Online -- Reinventing the Signal Processor article
Current-generation high-end ISA Digital Signal Processors (DSPs) use 600-MHz clocks and are on a trajectory to the Giga-Hertz region.
The software radio PHY is a complex signal processing system in which algorithmic and functional-level parallelism can be leveraged to realize a high-performance system that does not rely on raw speed for its performance.
DSP processors might be used for certain baseband functions such as source (de-) encoding, as with CELP codec.
www.xilinx.com /publications/xcellonline/xcell_45/xc_sdr45.htm   (2430 words)

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