Class 708/317 - Wave

Subclass of Class 708 - Electrical computers: arithmetic processing and calculating
Definition: Subject matter in which the filter has elements representing
No. of patents: 30
Last issue date: 04/22/2008

Number	Title	Issue Date
7363334	Digital signal-processing structure and methodology featuring engine-instantiated, wave-digital-filter componentry, and fabrication thereof 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 ...	04/22/2008
7152084	Parallelized infinite impulse response (IIR) and integrator filters A digital parallelized Infinite Impulse Response (IIR) integrator filter comprising a first channel having a first input and second channel having a second input, a first adder to add the two channel inputs, an integrator to integrate the added channel inputs to pro...	12/19/2006
7142606	Method and apparatus for shared processing a plurality of signals A signal processing apparatus preferably suitable for implementation as an integrated circuit, that is arranged and constructed to be shared for processing a plurality of signals without interference between the signals and method thereof, the signal processing appa...	11/28/2006
7016823	Method for simulating a mixer in circuit simulators and the like A method for operating a data processing system to simulate a mixer having an RF port, a LO port, and an IF port. In the present invention, the signal leaving the IF port is approximated by: b2=f(a1,a3)+S...	03/21/2006
6963889	Wave digital filter with low power consumption A wave digital filter which includes a plurality of memoryless adapters each having two or more ports, each port including an input and an output, and at least one controlled gate which delays the propagation of a value into at least one input of at least one of the...	11/08/2005
6954771	Adaptive line enhancer An improved adaptive line enhancer includes an adaptive Gray-Markel lattice notch filter having an adaptive notch frequency, in which the notch frequency is determined according to a notch frequency variable k. The value of k for the n+1th sample period i...	10/11/2005
6934649	Waveform detection system and state-monitoring system The present invention provides a waveform detection system and a state-monitoring system. The waveform detection system features a signal-processing function that characterizes and detects non-cyclic transient variations and performs 1/f fluctuation conversion for i...	08/23/2005
6898214	Technique for monitoring SONET signal A technique for performance-monitoring of a standard SONET signal involves first converting the optical signal to an electrical signal, removing in the framing signal time slot the framing signal for leaving only the framing signal noise in such time slot, and separ...	05/24/2005
6300823	Filter circuit A filter circuit comprises a plurality of sampling and holding circuits for sampling and holding analog input signal with a predetermined sampling period, a calculation circuit for multiplying each the analog input signal by a predetermined multiplier, an...	10/09/2001
6108680	System and method for filtering using an interleaved/retimed architecture An interleaved all-pass section for a lattice wave digital filter, comprises a first input carrying an interleaved signal, a first adder/multiplier network (AMN) connected to said first input, a second adder/multiplier network (AMN), and a delay element c...	08/22/2000
5668746	Reproduced waveform equalization circuit Low-frequency components of a reproduced modulated signal is attenuated by an analog high-pass filter. The modulated signal with its low-frequency components attenuated is converted into a digital signal by means of an A/D converter. Then, the digital sig...	09/16/1997
5526299	Method and apparatus for encoding and decoding using wavelet-packets The disclosure involves the use of a library of modulated wavelet-packets which are effective in providing both precise frequency localization and space localization. An aspect of the disclosure involves feature extraction by determination of the correlat...	06/11/1996
5384725	Method and apparatus for encoding and decoding using wavelet-packets The disclosure involves the use of a library of modulated wavelet-packets which are effective in providing both precise frequency localization and space localization. An aspect of the disclosure involves feature extraction by determination of the correlat...	01/24/1995
5249145	Transforming adaptors for wave digital filter and balancing network using same A balancing network of a wave digital type filter including 3-port pair transforming adaptors (21 to 26) connected in cascade each having a capacitor (C) and a resistor (R) as constituent elements and performing a filter operation function. There is no re...	09/28/1993
5233548	Method and network configuration for attaining a continuous variation in the transfer function of an adaptive recursive network for processing discrete-time signals A method and network configuration attain a continuous variation in the transfer function of an adaptive recursive network having multi-port subnetworks associated with parameters of the network, for processing discrete-time signals upon continuous variat...	08/03/1993
5204831	Circuit configuration for digital bit-serial signal processing A circuit configuration for digital bit-serial signal processing includes n input shift registers each being written in parallel or serially with an input data word and then read out by shifting to the right. Sign repetition devices are each assigned to a...	04/20/1993
5200914	Wave digital filter with fine grained pipelining A wave digital filter implements a pipelining strategy to significantly increase the processing speed of circuits. The implementation allows high frequency digital signals to be processed at higher speeds than were previously possible. The implementation ...	04/06/1993
5197020	Wave digital filter composed of delays and n-port adaptors A wave digital filter wherein structures are specified such that the transfer function (Y/X) can be arbitrarily prescribed. The filter input signal X--individually weighted via multipliers (E1 . . . Ex)--is input at all adaptor input...	03/23/1993
5138568	Method and circuit configuration for avoiding overflows in an adaptive, recursive digital wave filter having fixed point arithmetic An adaptive, recursive digital wave filter includes a transfer filter and a gradient filter each having a respective adaptor with a given coefficient. A method and circuit configuration for avoiding overflows in the filter include multiplying a signal emi...	08/11/1992
4873646	Digital Correction of linear system distortion An M-element waveform data sequence representative of an analog input signal during a period of interest is produced by first amplifying the input signal with a linear amplifier and periodically digitizing the amplifier output signal to produce a first da...	10/10/1989
4866649	Multi-dimensional digital filter having adders, multipliers and shift elements Multi-dimensional digital filters have such a circuit structure that their transfer function corresponds to that of an antimetrical filter, and have a characteristic function that is a rational function of the squares of the equivalent complex frequencies...	09/12/1989
4827443	Corrective digital filter providing subdivision of a signal into several components of different frequency ranges A wave digital filter has one input set to zero and a signal to be distortion-compensated or simply to be subdivided into signals occupying different frequency ranges is supplied at the other input. The attenuation/frequency characteristics of the respect...	05/02/1989
4724395	Median filter for reconstructing missing color samples Apparatus and method for sensing sampled colored image data and thereafter interpolating the sampled colored image data to provide image data in each color sampled for each point or pixel at which the subject is sensed from which an image of the subject m...	02/09/1988
4716537	Circuit arrangement for simulating a resistive elementary two port device for use in a wave digital filter A wave two port circuit arrangement for simulating a resistive elementary port two device for use in a wave digital filter. First and second ports are each arranged for receiving input and output signals. A summing device is connected to the first and sec...	12/29/1987
4475229	Device for producing artifical reverberation In a device for producing artificial reverberation by means of a one-dimensional waveguide, a one-dimensional waveguide is utilized, which is obtained using digital circuits which contain at least two line sections of different length, each line section c...	10/02/1984
4192008	Wave digital filter with multiplexed arithmetic hardware The wave digital filter derived from a symmetric lattice reference filter includes two one-port networks each of which consists of storage elements interconnected by arithmetic units. Each arithmetic unit comprises a digital multiplier and three digital a...	03/04/1980
4095276	Digital signal processing arrangement including a wave digital filter A digital signal processing arrangement including a wave digital filter having quantizing means for limiting the signal waves present to a predetermined word length by means of controlled rounding. "Controlled rounding" means that a limit-cycle-free outpu...	06/13/1978
4061905	Filter having frequency-dependent transmission properties for electric analog signals In one illustrative embodiment, a filter circuit for discrete signals is provided corresponding in filter function to an analog ladder structure containing inductive and capacitive components. The reactive components of the analog filter structure are rea...	12/06/1977
3980872	Digital filter for electrical signals A wave digital filter comprising at least one filter section without delay elements, each port thereof having a positive port admittance, and the signal quantities therein being operated upon, preferably within certain individual multiport adaptors of the...	09/14/1976
3967099	Filter having frequency-dependent transmission properties for electric analog signals In one illustrative embodiment, a basic filter circuit for discrete signals is provided corresponding in filter function to an analog ladder network containing inductive and capacitive components. The reactive components of the analog filter structure are...	06/29/1976

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Class 708/317 - Wave