Digital signal-processing structure and methodology featuring engine-instantiated, wave-digital-filter componentry, and fabrication thereof
DCFirst Claim
1. Digital signal-processing structure in the form of programmed hardware comprisinga Type-II wave digital filter (WDF) agency taking the form of a concatenated series of four 5th-Order elliptical sections, including three, upstream input sections which are non-decimating sections, and a single, downstream output section which is a decimating section, said agency having input and output sides operatively coupled to said input and output sections, respectively, andsignal input and output structures operatively connected, respectively, to said input and output sides.
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Abstract
Digital signal-processing structure and methodology which feature a time-slice-based digital fabricating engine, and software operating structure operatively associated with that engine structured to operate the engine in a time-slice-based fabrication mode wherein the engine, in a time-differentiated and instantiating manner, functions to fabricate a time-succession of individual, composite wave digital filters. Each of these filters takes the form of (1) a concatenated assembly including one to a plurality of upstream, early-stage, decimate-by-two, signal-processing agencies connected in a cascade series arrangement, with each such agency possessing a first transfer function having a first transition bandwidth, and (2) a single, downstream, later-stage, decimate-by-two, signal-processing agency which possesses a second transfer function having a transition bandwidth which is less than the mentioned first transition bandwidth.
27 Citations
30 Claims
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1. Digital signal-processing structure in the form of programmed hardware comprising
a Type-II wave digital filter (WDF) agency taking the form of a concatenated series of four 5th-Order elliptical sections, including three, upstream input sections which are non-decimating sections, and a single, downstream output section which is a decimating section, said agency having input and output sides operatively coupled to said input and output sections, respectively, and signal input and output structures operatively connected, respectively, to said input and output sides.
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19. Digital signal-processing structure in the form of programmed hardware comprising
a plurality of early-stage, decimate-by-two, signal-processing agencies connected in a cascade series arrangement, said agencies each being associated with a first transfer function having a first transition bandwidth, and each having an output, and a later-stage, decimate-by-two, signal-processing agency selectively coupleable to different ones of said outputs, said later-stage agency being associated with a second transfer function having a transition bandwidth which is less than said first transition bandwidth.
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23. Digital signal-processing structure comprising,
a time-slice-based digital fabricating engine, and software operating structure operatively associated with said engine, structured to operate the engine in a time-slice-based fabrication mode wherein the engine, in a time-differentiated and instantiating manner, functions to fabricate a time-succession of individual, composite wave digital filters, wherein each of said fabricated filters takes the form of a cascade series arrangement including an upstream, Type-I, decimate-by-two, wave digital filter (WDF) agency, which includes an effective concatenation of a single, non-decimating, 5th-Order elliptical section followed by a single, decimating, 5th-Order elliptical section, having an output side connected to an input side in a downstream, Type II, decimate-by-two, WDF agency, which includes an effective concatenation of three, non-decimating, 5th-Order elliptical sections followed by a single, decimating, 5th-Order elliptical section.
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24. Digital signal-processing structure comprising,
a time-slice-based digital fabricating engine, and software operating structure operatively associated with said engine, structured to operate the engine in a time-slice-based fabrication mode wherein the engine, in a time-differentiated and instantiating manner, functions to fabricate a time-succession of individual, composite wave digital filters, wherein each of said fabricated, composite wave digital filters takes the form of a cascade series arrangement including an upstream plurality of cascade-series-connected, Type-I, decimate-by-two, wave digital filter (WDF) agencies, each of which includes an effective concatenation of a single, non-decimating, 5th-Order elliptical section followed by a single, decimating, 5th-Order elliptical section, collectively having an output region, and a downstream, Type-II decimate-by-two, WDF agency, which includes an effective concatenation of three, non-decimating, 5th-Order elliptical sections followed by a single, decimating, 5th-Order elliptical section, having an input side operatively connected to said output region.
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25. Digital signal-processing structure comprising
a time-slice-based fabricating engine operable over an extent of time, and during a defined span within such a time extent, to fabricate/realize, as an integral structural and functional portion of itself, a pair of signal input and output zones, and interposed said zones, at least one time-slice-instantiated wave digital filter assembly (WDFA) which is structured to intake and process a signal presented to said input zone, and to furnish to said output zone a WDFA-processed version of such an in-taken signal, and wherein said WDFA comprises a Type-I wave digital filter (WDF) agency which includes an effective concatenation of a single, non-decimating, 5th-Order elliptical section followed by a single, decimating, 5th-Order elliptical section.
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26. Digital signal-processing structure comprising
a time-slice-based fabricating engine operable over an extent of time, and during a defined span within such a time extent, to fabricate/realize, as an integral structural and functional portion of itself, a pair of signal input and output zones, and interposed said zones, at least one time-slice-instantiated wave digital filter assembly (WDFA) which is structured to intake and process a signal presented to said input zone, and to furnish to said output zone a WDFA-processed version of such an in-taken signal, and wherein said WDFA comprises a Type-II wave digital filter (WDF) agency, which includes an effective concatenation of three, non-decimating, 5th-Order elliptical sections followed by a single, decimating, 5th-Order elliptical section.
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27. Digital signal-processing structure comprising
a time-slice-based fabricating engine operable over an extent of time, and during a defined span within such a time extent, to fabricate/realize, as an integral structural and functional portion of itself, a pair of signal input and output zones, and interposed said zones, at least one time-slice-instantiated wave digital filter assembly (WDFA) which is structured to intake and process a signal presented to said input zone, and to furnish to said output zone a WDFA-processed version of such an in-taken signal, and wherein said WDFA comprises a composite Type-I and Type-II wave digital filter (WDF) agency arrangement in which the Type-I agency, each of which includes an effective concatenation of a single, non-decimating, 5th-Order elliptical section followed by a single, decimating, 5th-Order elliptical section, is disposed upstream relative to the Type-II agency, which includes an effective concatenation of three, non-decimating, 5th-Order elliptical sections followed by a single, decimating, 5th-Order elliptical section.
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28. A digital signal-processing method comprising
providing a time-slice-based digital fabricating engine, utilizing that engine, instantiating in time-spaced phases wave digital filter (WDF) structure, and during said instantiating, feeding a signal through, and processing that signal by, such phase-instantiated WDF structure, and wherein said instantiating includes phased fabricating of a Type-II WDF agency which includes an effective concatenation of three, non-decimating, 5th-Order elliptical sections followed by a single, decimating, 5th-Order elliptical section.
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29. A digital signal-processing method comprising
providing a time-slice-based digital fabricating engine, utilizing that engine, instantiating in time-spaced phases wave digital filter (WDF) structure, and during said instantiating, feeding a signal through, and processing that signal by, such phase-instantiated WDF structure, and wherein said instantiating includes phased fabricating of a Type-I WDF agency which includes an effective concatenation of a single, non-decimating, 5th-Order elliptical section followed by a single, decimating, 5th-Order elliptical section.
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30. A digital signal-processing method comprising
providing a time-slice-based digital fabricating engine, utilizing that engine, instantiating in time-spaced phases wave digital filter (WDF) structure, and during said instantiating, feeding a signal through, and processing that signal by, such phase-instantiated WDF structure, and wherein said instantiating, from the point of view of a signal being processed in accordance with the method, includes, first, phased fabricating of a Type-I WDF agency which includes an effective concatenation of a single, non-decimating, 5th-Order elliptical section followed by a single, decimating, 5th-Order elliptical section, and second, phased fabricating of a Type-II WDF agency which includes an effective concatenation of three, non-decimating, 5th-Order elliptical sections followed by a single, decimating, 5th-Order elliptical section.
Specification