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In signal processing, a digital biquad filter is a second order recursive linear filter, containing two poles and two zeros. "Biquad" is an abbreviation of "biquadratic", which refers to the fact that in the Z domain, its transfer function is the ratio of two quadratic functions: The coefficients are often normalized such that a0 = 1:

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rdf:type	yago:WikicatLinearFilters yago:Artifact100021939 yago:Device103183080 yago:Filter103339643 yago:Instrumentality103575240 yago:Object100002684 yago:PhysicalEntity100001930 yago:Whole100003553
rdfs:label	Filtre digital biquad (ca) Digital biquad filter (en)
rdfs:comment	Dins el camp de processament de senyal, un filtre digital biquad és un filtre recursiu i linear de segon ordre, que conté dos pols i dos . El terme "biquad" és l'abreviació de "biquadràtic", que es refereix al fet que la funció de transferència del filtre en el és la relació de proporcionalitat entre dues funcions de segon grau: És habitual la normalització dels coeficients tal que : (ca) In signal processing, a digital biquad filter is a second order recursive linear filter, containing two poles and two zeros. "Biquad" is an abbreviation of "biquadratic", which refers to the fact that in the Z domain, its transfer function is the ratio of two quadratic functions: The coefficients are often normalized such that a0 = 1: (en)
foaf:depiction
dct:subject	Audio engineering Filter theory Linear filters
Wikipage page ID	10280692 (xsd:integer)
Wikipage revision ID	1086636191 (xsd:integer)
Link from a Wikipage to another Wikipage	Quadratic function Electronic filter topology Pole–zero plot Signal processing Z-transform Audio engineering Linear filter Filter theory Digital filter Quantization (signal processing) Linear filters Transfer function Recursive filter Difference equation BIBO stability IIR filter
Link from a Wikipage to an external page	http://peabody.sapp.org/class/350.838/lab/biquad/ http://shepazu.github.io/Audio-EQ-Cookbook/audio-eq-cookbook.html https://www.vicanek.de/articles/BiquadFits.pdf https://ccrma.stanford.edu/~jos/fp/Transposed_Direct_Forms.html https://en.wikibooks.org/wiki/Digital_Signal_Processing/IIR_Filter_Design%23Chain_of_Second_Order_Sections http://ccrma.stanford.edu/~jos/filters/BiQuad_Section.html
sameAs	Digital biquad filter Digital biquad filter Digital biquad filter Digital biquad filter Digital biquad filter
dbp:wikiPageUsesTemplate	dbt:Expand_section dbt:More_footnotes dbt:Reflist
thumbnail	wiki-commons:Special:FilePath/Biquad_filter_DF-I.svg?width=300
has abstract	Dins el camp de processament de senyal, un filtre digital biquad és un filtre recursiu i linear de segon ordre, que conté dos pols i dos . El terme "biquad" és l'abreviació de "biquadràtic", que es refereix al fet que la funció de transferència del filtre en el és la relació de proporcionalitat entre dues funcions de segon grau: És habitual la normalització dels coeficients tal que : Els filtres biquad sovint s'utilitzen per evitar inestabilitats en filtres IIR. Els filtres IIR d'ordres elevats poden presentar inestabilitats degudes a la quantificació dels seus coeficients. Això no sol afectar els filtres de primer o segon ordre; és per aquest motiu que els filtres d'ordres superiors s'implementen a base de fer combinacions en cascada d'estructures biquad en sèrie (i filtres de primer ordre si és necessari). Un filtre biquad serà estable si els seus dos pols es mantenen dins el cercle unitat. En general, aquesta condició és vàlida per a tots els filtres. (ca) In signal processing, a digital biquad filter is a second order recursive linear filter, containing two poles and two zeros. "Biquad" is an abbreviation of "biquadratic", which refers to the fact that in the Z domain, its transfer function is the ratio of two quadratic functions: The coefficients are often normalized such that a0 = 1: High-order IIR filters can be highly sensitive to quantization of their coefficients, and can easily become unstable. This is much less of a problem with first and second-order filters; therefore, higher-order filters are typically implemented as serially-cascaded biquad sections (and a first-order filter if necessary). The two poles of the biquad filter must be inside the unit circle for it to be stable. In general, this is true for all discrete filters i.e. all poles must be inside the unit circle in the Z-domain for the filter to be stable. (en)
prov:wasDerivedFrom	wikipedia-en:Digital_biquad_filter?oldid=1086636191&ns=0
page length (characters) of wiki page	7704 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Digital_biquad_filter
is Link from a Wikipage to another Wikipage of	Electronic filter topology General Instrument SP0256 Butterworth filter Linear filter FFmpeg Digital filter Folding (DSP implementation) KFRlib Bilinear transform Filter design Switched capacitor Second-order section Digital biquadratic filter
is Wikipage redirect of	Second-order section Digital biquadratic filter
is foaf:primaryTopic of	wikipedia-en:Digital_biquad_filter

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