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| | Signal |
 | | Signal (information theory) A signal is an abstract element of information, or (more commonly) a flow of information (in... | | | Signal generator A signal generator is a box with a variable frequency dial, a waveform selector an attenuator, and a le... | | | Signal beam A signal beam or object beam is one of at least two spatial light modulator). |
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http://www.brainyencyclopedia.com/topics/signal.html
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| | Signal (information theory) - Wikipedia, the free encyclopedia |
| | As a result, the values of such a signal are restricted to belong to a finite set; in other words, it is quantized. | | | In short, the difference between them is that digital signals are discrete and quantized, as defined below, while analog signals possess neither property. | | | In the mathematical abstraction, the domain of a continuous-time (CT) signal is the set of real numbers (or some interval thereof), whereas the domain of a discrete-time signal is the set of integers (or some interval). |
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http://en.wikipedia.org/wiki/Signal_(information_theory)
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| | Digital signal processing - Encyclopedia.WorldSearch |
| | The output of an FIR filter to any given input may be calculated by convolving the input signal with the impulse response. | | | The mathematical calculations and algorithms required for DSP are sometimes executed in hardware digital signal processors, also abbreviated DSP. | | | The continuous signal is usually sampled at regular intervals by an Analog to digital converter and the value of the continuous signal in that interval is represented by a discrete value. |
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http://encyclopedia.worldsearch.com/digital_signal_processing.htm
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| | Signal Classifications and Properties |
| | An easy example of a digital signal is a binary sequence, where the values of the function can only be one or zero. | | | Along with the classification of signals below, it is also important to understand the Classification of Systems. | | | On the other hand, a random signal has a lot of uncertainty about its behavior. |
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http://cnx.rice.edu/content/m10057/latest
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| | 7.1 signal -- Set handlers for asynchronous events |
| | There is no way to ``block'' signals temporarily from critical sections (since this is not supported by all Unix flavors). | | | The fundamental thing to remember in using signals and threads simultaneously is: always perform | | | This means that signals arriving during long calculations implemented purely in C (such as regular expression matches on large bodies of text) may be delayed for an arbitrary amount of time. |
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http://www.python.org/doc/current/lib/module-signal.html
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| | Signal - definition of Signal in Encyclopedia |
| | (in electronics) a signal is any physical phenomenon that can be modeled as a function from time or position. | | | In economics, a signal describe a way of credibly conveying information from one party to another. | | | (in a partnership card game) a player's choice of card to play at a particular time, which gives information to a partner, in a partnership card game (see signal (bridge)). |
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http://encyclopedia.laborlawtalk.com/Signal
(205 words)
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| | Laptop Security: Take Control! |
| | Stealth Signal will offer to buy your stolen computer if not recovered within 60 days. | | | "Stealth Signal has powerful tracking and management capability with a simple install." | | | "Early the next morning I was astonished to receive an e-mail from Stealth Signal, which had tracked the laptop to my home address and phone, even though my number is blocked." |
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http://www.stealthsignal.com
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| | Home Signal |
| | LATEST MAGAZINES - a summary of recent signalling articles in magazines, edited by David Clegg. | | | SIGNALMAN'S BOOKSHELF - a list of signalling books in and out of print, together with a summary of current magazine articles. | | | SIGNALS - illustrations of British signals and descriptions of their function. |
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http://www.signalbox.org
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| | signal |
| | An attempt was made to set the action to SIG_DFL for a signal that cannot be caught or ignored (or both). | | | the behavior is undefined if the signal handler refers to any object with static storage duration other than by assigning a value to an object declared as volatile sig_atomic_t, or if the signal handler calls any function in the standard library other than one of the functions listed in | | | If the value of func is SIG_IGN, the signal shall be ignored. |
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http://www.opengroup.org/onlinepubs/009695399/functions/signal.html
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| | WAC Gallery9 WebWalker Daily dietz art entertainment network |
| | It may be that in Shannon's model all the interpretive stuff is a kind of noise, confusing the signal, and what is critical is the elegance, speed, and accuracy of the algorithm used to encode and de-encode the information source and transmit its signal. | | | This equals one bit of information, regardless whether it is conveyed via a pre-arranged signal such as one finger for a boy, two for a girl, or if the nurse were to come out and say to the father, "Congratulations. | | | If the nurse signals to him that it is a girl, these two choices become one. |
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http://www.walkerart.org/archive/A/B47385195FB875116161.htm
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| | signal - a Whatis.com definition |
| | Signal modulation can be done in either of two main ways: analog and digital. | | | There are still plenty of analog signals around, however, and they will probably never become totally extinct. | | | Except for DC signals such as telegraph and baseband, all signal carriers have a definable frequency or frequencies. |
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http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212986,00.html
(279 words)
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| | Digital signal processing - Wikipedia, the free encyclopedia |
| | In order to use an analog signal on a computer it must be digitized with an analog to digital converter (ADC). | | | The output of an FIR filter to any given input may be calculated by convolving the input signal with the impulse response. | | | 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. |
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http://en.wikipedia.org/wiki/Digital_signal_processing
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| | SiSoft - Signal Integrity Software - Provides consulting services and software for the design of High-Speed Systems, PCBs (Printed Circuit Boards), ASICs, IBIS Modeling, and ICs (Integrated Circuits) |
| | SI Consulting, high speed bus design, high speed system design, Static Timing Verification, Timing verification, Signal integrity, Timing analysis, Electronic design automation, Computer aided design and Model validation are all things SiSoft excels at doing. | | | Library development, Pre-layout, pre-layout analysis, post-layout verification, post-layout analysis, graphical capture, schematic capture, graphical front-end for spice, connector analysis, advanced package design and analysis, Post-layout, packages, connectors, interface analysis, Design verification, IC interfaces, Electrical Interconnects, Signal Integrity Analysis, SiWorkBench, analysis of leading-edge IC packages and PCBs, design kit, design kits, mcm, technology assessments, software, HSPICE | | | SiSoft - Signal Integrity Software - Provides consulting services and software for the design of High-Speed Systems, PCBs (Printed Circuit Boards), ASICs, IBIS Modeling, and ICs (Integrated Circuits) |
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http://www.sisoft.com
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| | APOD: 2004 March 7 - An Anomalous SETI Signal |
| | The bright colors on the blue background indicate that an anomalous signal was received here on Earth by a radio telescope involved in a Search for Extraterrestrial Intelligence (SETI). | | | In this case, a leading possibility is that the signal originates from an unusual modulation between a GPS satellite and an unidentified Earth-based source. | | | Although this strong signal was never positively identified, astronomers have identified in it many attributes characteristic of a more mundane and ultimately terrestrial origin. |
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http://antwrp.gsfc.nasa.gov/apod/ap040307.html
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| | Event-driven programming - Wikipedia, the free encyclopedia |
| | Programming an event driven system is thus a matter of rewriting the default trigger functions of the system, to match the required behavior. | | | Event-driven programming stresses flexibility and asynchrony as virtues, and tries to be as modeless as possible. | | | Event-driven programs typically consist of a number of small programs called event handlers, which are to be called in response to external events, and a dispatcher, which calls the event handlers, often using an event queue to hold unprocessed events. |
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http://en.wikipedia.org/wiki/Event-driven_programming
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| | SIGNAL - ING exposure-time calculator |
| | SIGNAL calculates the number of photons per A detected from a source of given apparent magnitude (per arcsec^2 if extended), as: | | | Sky brightness for other values of lunar phase, lunar zenith angle, sky position and extinction, can be estimated with SIGNAL's sky-brightness calculator (see the interface above). | | | SIGNAL's default optical sky-brightness settings are median for dark-of-moon, solar minimum, at high galactic and ecliptic latitude and in the absence of twilight and moonlight (enter D, G or B for typical dark (brighter than default), grey and bright of moon). |
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http://www.ing.iac.es/~crb/signal.html
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| | Introduction to Digital Signal Processing |
| | The development of digital signal processing dates from the 1960's with the use of mainframe digital computers for number-crunching applications such as the Fast Fourier Transform (FFT), which allows the frequency spectrum of a signal to be computed rapidly. | | | The processing of a digital signal is done by performing numerical calculations. | | | Signal compression is used in digital cellular phones to allow a greater number of calls to be handled simultaneously within each local "cell". |
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http://www.dsptutor.freeuk.com/intro.htm
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| | Patent 4965825: Signal processing apparatus and methods |
| | Examples of signal units are a unique code identifying a programming unit, or a unique purchase order number identifying the proper use of a programming unit, or a general instruction identifying whether a programming unit is to be retransmitted immediately or recorded for delayed transmission. | | | If a signal or signals are to be transferred externally, in a predetermined fashion controller, 12, identifies the external apparatus to which the signal or signals are addressed and transfers them to the appropriate port or ports for external transmission. | | | In the present invention, particular signal processing apparatus (hereinafter called the "signal processor") detect signals and, in accordance with instructions in the signals and preprogramming in the signal processor, decrypt and/or record and/or control station apparatus by means of the signals and/or discard the signals. |
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http://www.freepatentsonline.com/4965825.html
(861 words)
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| | Digital Recording Techniques |
| | The difference between the instantaneous analog signal and de digital representation is digital error. | | | Digital techniques for storing and transmission of audio signals are attractive because they offer high quality signals, which do not deteriorate with transmission distance, number of copies or time. | | | The computers may be common microcomputers as well as main-frame computers. |
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http://www.digital-recordings.com/publ/pubrec.html
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| | Signal Processing Solutions: Electronic Filters |
| | Signal Processing Solutions manufactures and distributes versatile, high performance, DSP based electronic filters. | | | feature two independent 20KHz analog channels, programmable gain input and output amplifiers, a liquid crystal display, a serial computer interface, and a digital signal processor that performs a multitude of functions including tunable low-pass, high-pass, band-pass and band-stop filtering. |
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http://www.spsolutions.com
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| | FDI DSP - Digital Signal Processing - Design Guide |
| | Simply said, the digitized input signal is mathematically influenced by the DSP program. | | | It is important to note that distortion and noise can be introduced into digital filters simply by the conversion of analog signals into digital data, also by the digital filtering process itself and lastly by conversion of processed data back into analog. | | | A digital filter computes a quantized time-domain representation of the convolution of the sampled input time function and a representation of the weighting function of the filter. |
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http://www.freqdev.com/guide/dspguide.html
(3338 words)
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| | Digital signal processing - Wikipedia, the free encyclopedia |
| | In order to use an analog signal on a computer it must be digitized with an analog to digital converter (ADC). | | | The output of an FIR filter to any given input may be calculated by convolving the input signal with the impulse response. | | | 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. |
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http://en.wikipedia.org/wiki/Digital_signal_processing
(1380 words)
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| | Signal |
| | Signal also plays a major role in promoting early brushing in many developing countries through its schools programme. | | | For over 40 years, Signal has been helping millions of people, like you, to taste life to the full by providing products that are clinically proven to protect and enhance their oral health 24 hours a day. | | | This has included introducing a new range, Signal Xperience, designed to meet the needs of the young, plus initiatives to promote higher standards of oral hygiene, usually in association with dentists and other oral healthcare experts. |
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http://www.unilever.com/ourbrands/personalcare/Signal.asp
(312 words)
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| | DNA-Based Digital Signal Processing |
| | Although, using DNA to optimally solve the disparity estimation problem is currently impractical we observed that matching of digital signals is a fundamental problem that arises in many signal-processing applications. | | | 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. | | | 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. |
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http://ivpl.ece.northwestern.edu/Research/Current/DNAdsp/DNAdsp.html
(1786 words)
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| | Define digital signal processing - a definition from Whatis.com - see also: DSP |
| | Frequently Asked Questions (FAQs) on digital signal processing is a site that contains many links to information about DSP and related technologies. | | | Digital signal processing (DSP) refers to various techniques for improving the accuracy and reliability of digital communications. | | | A DSP circuit is able to differentiate between human-made signals, which are orderly, and noise, which is inherently chaotic. |
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http://whatis.techtarget.com/definition/0,,sid9_gci213898,00.html
(452 words)
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| | Analog_computer - Computers - Find What You're Looking For |
| | There is an intermediate group, hybrid computers, in which a digital computer is used to control and organize inputs and outputs to and from attached analogue devices; for instance analogue devices might be used to help generate initial values for iterations, or the analog computer might be used to solve a non-analytic differential equation problem. | | | An analog computer (American English) or analogue computer (British English) is a form of computer using electronic or mechanical phenomena to model the problem being solved by using one kind of physical quantity to represent another. | | | Analog synthesizers can also be viewed as a form of analog computer, and their technology was originally based on electronic analog computer technology. |
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http://computers.mysic.org/Analog_computer
(452 words)
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| | What is digital? - A Word Definition From the Webopedia Computer Dictionary |
| | Internally, computers are digital because they consist of discrete units called bits that are either on or off. | | | All data that a computer processes must be encoded digitally, as a series of zeroes and ones. | | | Although digital representations are approximations of analog events, they are useful because they are relatively easy to store and manipulate electronically. |
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http://www.webopedia.com/TERM/D/digital.html
(529 words)
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| | 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. | | | Signal Processing using C++ (SPUC) - A collection of efficient and reusable DSP building block objects (for digital communications simulation) written in C++. | | | 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. |
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http://dmoz.org/Science/Technology/Electronics/Signal_Processing/Digital_Signal_Processing_-_DSP
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