Digital signal processor: Difference between revisions

Revision as of 21:54, 28 December 2021

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[[File:Dsp chip.jpg|right|thumb|A [[Texas Instruments TMS320|TMS320]] digital signal processor chip found in a [[Effects unit|guitar effects unit]]. A [[crystal oscillator]] may be seen above.]]

[[File:NeXTcube motherboard.jpg|thumb|The [[NeXTcube]] from 1990 had a [[Motorola 68040]] (25 MHz) and a digital signal processor [[Motorola 56001]] with 25 MHz which was directly accessible via an interface.]]

A '''digital signal processor''' ('''DSP''') is a specialized [[microprocessor]] chip, with its architecture optimized for the operational needs of [[digital signal processing]].<ref>{{ cite book | editor-last1 = Yovits | editor-first1 = Marshall C. | last1 = Dyer | first1 = Stephen A. | last2 = Harms | first2 = Brian K. | chapter = Digital Signal Processing | title = Advances in Computers | date = 1993-0908-1413 | volume = 37 | pages = 59{{hyphen}}118 | publisher = [[Academic Press]] | doi = 10.1016/S0065-2458(08)60403-9 | isbn = 978-0120121373 | issn = 0065-2458 | lccn = 59015761 | chapter-url = https://books.google.com/books?id=vL-bB7GALAwC&pg=PA104 | ol = OL10070096M | oclc = 858439915 | df = dmy-all}}</ref>{{rp|pages=104{{hyphen}}107}}<ref name="Liptak">{{ cite book | last = Liptak | first = B. G. | title = Process Control and Optimization | series = Instrument Engineers' Handbook | edition = 4th | year = 2006 | volume = 2 | pages = 11–12 | publisher = CRC Press | isbn = 978-0849310812 | url = https://books.google.com/books?id=TxKynbyaIAMC&pg=PA11 | via = [[Google Books]] }}</ref> DSPs are [[semiconductor device fabrication|fabricated]] on [[MOS integrated circuit]] chips.<ref name="computerhistory1979"/><ref name="edn"/> They are widely used in [[audio signal processing]], [[telecommunications]], [[digital image processing]], [[radar]], [[sonar]] and [[speech recognition]] systems, and in common [[consumer electronic]] devices such as [[mobile phones]], [[disk drives]] and [[high-definition television]] (HDTV) products.<ref name="computerhistory1979"/>

The goal of a DSP is usually to measure, filter or compress continuous real-world [[analog signals]]. Most general-purpose microprocessors can also execute digital signal processing algorithms successfully, but may not be able to keep up with such processing continuously in real-time. Also, dedicated DSPs usually have better power efficiency, thus they are more suitable in portable devices such as [[mobile phone]]s because of power consumption constraints.<ref name="schaum-2004">{{cite web