Quotables
"The abolishment of pain in surgery is a chimera. It is absurd to go on seeking it...knife and pain are two words in surgery that must forever be associated in the consciousness of the patient."
Dr. Alfred Velpeau, French surgeon ; 1839
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7310056 | Method and system for adjustable sample rate conversion Described herein is a method and system for sampling rate conversion. A clamped cubic spline interpolator (CCSI) may be utilized to interpolate or decimate a source signal to provide samples at times based on a sink rate. The source clock and sink clock may be drive... | 12/18/2007 |
| 7136434 | Apparatus and method for detecting energy of tone signal An apparatus and a method for detecting the energy of a tone signal. A pre-process unit takes absolute values of transmitted samples and outputs the values to a delay unit for delaying the transmitted samples according to a predetermined delay interval. An operation... | 11/14/2006 |
| 7124042 | Estimating a plurality of tones in an input signal A system and method for estimating parameters of multiple tones in an input signal. The method includes receiving samples of the input signal, generating a frequency transform (FT) of the samples, identifying multiple amplitude peaks in the FT corresponding to the t... | 10/17/2006 |
| 7111030 | Method of detecting pilot tones in a noisy signal This invention relates to detecting a pilot tone in an optical fiber. In the method described in the invention, computational complexity is reduced significantly by almost completely removing the need to carry out multipli-cations. To calculate certain spectral comp... | 09/19/2006 |
| 7110417 | Instance memory handoff in multi-processor systems A given DSP, when processing signals of a channel, stores channel instance data in a multiplexed memory in association with itself. If the channel processing task changes to one for which the given DSP is not optimised, the given DSP moves the channel to an appropri... | 09/19/2006 |
| 7088817 | Method and apparatus for performing high-density DTMF, MF-R1, MF-R2 detection Detectors determine the presence of valid sinusoids for DTMF, MF-R1 and MF-R2 protocols for encoding dialed digits. The detectors split electrical signals into subbands. Energies within the subbands are analyzed to determine a presence of sinusoids corresponding to ... | 08/08/2006 |
| 7082143 | Voice and data exchange over a packet based network with DTMF A method and system for detecting a dual tone in a composite signal having first and second components including means for separating the composite signal into its first and second components, means for estimating power of the separated first and second components, ... | 07/25/2006 |
| 7028062 | FIR filter, method of operating the same, semiconductor integrated circuit including FIR filter, and communication system for transmitting data filtered by FIR filter The FIR filter separately receives input data consisting of transmitting information and composed of bit strings, and additional data which is added in order to transmit the input data. The input data is operated with the additional data. A difference between the ad... | 04/11/2006 |
| 7023981 | Method and apparatus for signal detection A signal detector for detecting a signal having a first nominal frequency, F1 and a second nominal frequency F2, the signal intermixed with an interfering signal to form a composite signal, the signal detector including a first and a second band pass f... | 04/04/2006 |
| 7024357 | Tone detector with noise detection and dynamic thresholding for robust performance An apparatus for detecting at least one tone having a known frequency and duration in an input signal. The input signal is input over a period of time which is divided into frame portions including at least an initial frame portion and a last frame portion. An energ... | 04/04/2006 |
| 7020224 | Ultra-wideband correlating receiver A receiver for ultra-wideband communications is provided. One feature of the receiver architecture is that includes only a single correlator. The receiver may be used in wireless and wire communication mediums. The single correlator may be used to update a locally g... | 03/28/2006 |
| 7012979 | Tone signal detection circuit for detecting tone signals Tone signal detection circuit for a receiving circuit for detecting at least one tone signal of predetermined tone signal frequency (fE) which is contained in a received analog input signal, comprising a reference signal generator (41) for generati... | 03/14/2006 |
| 7003413 | System and method of extraction of nonstationary sinusoids Signal processing techniques and systems and, in particular, an apparatus, system, algorithm and method of extraction of sinusoidal signals of time-varying nature is described. The apparatus, system, algorithm and method provide for extraction of a specified single ... | 02/21/2006 |
| 6996064 | System and method for determining network throughput speed and streaming utilization To evaluate a communications network, a plurality of network evaluation signals, or probative test packets, are selectively sent and received through the network. Responsive to these evaluation signals, network evaluation parameters are determined and stored. Queuin... | 02/07/2006 |
| 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 |
| 6934655 | Method and apparatus for transmission line analysis A method and system for performing sequence time domain reflectometry to determine the location of line anomalies in a communication channel is disclosed. In one embodiment, the system generates a sequence signal and transmits the sequence signal over a channel that... | 08/23/2005 |
| 6931076 | Signal detector A method, apparatus, and system for detecting a tone. In some embodiments, a signal is communicated by applying a first quantity of samples per period and a second quantity of samples per period. The samples may then be translated into information. For example, the ... | 08/16/2005 |
| 6915264 | Cochlear filter bank structure for determining masked thresholds for use in perceptual audio coding A method and apparatus for determining masked thresholds for a perceptual auditory model used, for example, in a perceptual audio coder, which makes use of a filter bank structure comprising a plurality of filter bank stages which are connected in series, wherein ea... | 07/05/2005 |
| 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 |
| 6873701 | System and method for DTMF detection using likelihood ratios A system and method for determining DTMF coefficients stores a plurality of reference templates, at least some of said reference templates representative of likelihood ratios. A plurality of LPC coefficients is received. The LPC coefficients are representative of an... | 03/29/2005 |
| 6782095 | Method and apparatus for performing spectral processing in tone detection A general purpose network tone detection method and apparatus that allows the precise and accurate recognition of North American tones (MF, DTMF (Dual-Tone Multifrequency), and CPT (Call Progress Tones)) and international MF-R2 tones as well as taking into considera... | 08/24/2004 |
| 6574334 | Efficient dynamic energy thresholding in multiple-tone multiple frequency detectors An apparatus for determining energy threshold detection values for detecting at least one tone having a known frequency and duration in an input signal. The input signal is input over a period of time that is divided into frame portions including at least... | 06/03/2003 |
| 6424925 | Circuit and method for detecting a tone signal A tone detector includes at least one circuit (hereinafter "single phase reference matcher") that not only performs a convolution of an input signal with a reference signal, but also compares the result of convolution with a threshold to determine if ther... | 07/23/2002 |
| 6353629 | Poly-path time domain equalization Improved techniques for time domain equalization are disclosed. The improved techniques include (i) improved time domain equalization techniques referred to as poly-path time domain equalization techniques; (ii) improved training methods for training tran... | 03/05/2002 |
| 6332151 | Time discrete filter A decimating time discrete filter comprises transform means (2) for transfornming a real valued input signal i into a complex signal u represented by its real part Re{U} and its imaginary part Im{u}. The output signal u is down sampled by means of a decim... | 12/18/2001 |
| 6304133 | Moving average filter A moving averaging filter which does not propagate a calculation error is provided reducing the size of the hardware. This moving average filter has a data holding unit for holding multiple successive data, a coefficient storing unit for storing coefficie... | 10/16/2001 |
| 6236838 | System for superresolution based estimation of control signals in a communications system A system for wireless communication between a base station 30 and one or more remote stations 32 and 34 wherein a desired signal has associated therewith an identifier tone (a SAT in the vernacular of the AMPS system) and wherein interfering signals may h... | 05/22/2001 |
| 6195675 | Tone detection using discrete fourier transform techniques Supervisory audio tone (SAT) in a receive signal in a wireless communications system is detected using a discrete Fourier transform (DFT) supplied with samples of a filtered and decimated signal derived from the receive signal. The DFT can comprise M 2-in... | 02/27/2001 |
| 6122652 | Tone and periodical signal detection Algorithms for quickly and efficiently detecting a periodic signal such as a DTMF signal in a telephone system are described. The algorithms, implemented in a tone detector, detect the periodicity of the input data and do not require an estimation of the ... | 09/19/2000 |
| 6026419 | Single tone signal detector A signal detector for detecting a narrow-band signal of a desired frequency, using an adaptive type FIR filter having two filter coefficients, is disclosed. Using this filter, the input signal of a shift register which delays the signal, is estimated by r... | 02/15/2000 |
| 6023191 | Method and apparatus for detecting an input signal A level detector detects an input signal level. A rectifier (210) receives the input signal and provides a rectified signal. A prefilter (220) receives the rectified signal and attenuates high frequency components at frequencies near multiples of a decima... | 02/08/2000 |
| 6003055 | Digital filter interpolation circuit An interpolation circuit for a digital filter which is small in circuit scale, operates at a high speed and is low in power consumption. The digital interpolation filter circuit includes front-end circuit 1 which outputs added value Σi of inpu... | 12/14/1999 |
| 5999954 | Low-power digital filtering utilizing adaptive approximate filtering A method of digital filtering and a digital filter having a filter response with a predetermined filter order. The filter response produces a predetermined set of filtered output samples defining an output signal from a received input signal. The differen... | 12/07/1999 |
| 5916301 | Sample rate conversion for synchronous variable rate The concept of integer ratio sample rate conversion is extended to fractional values, where the exact ratio is expressed as M+N/D!/L with L being a constant. This methodology allows sample rate conversion for all synchronous rates, where all rates are d... | 06/29/1999 |
| 5910906 | Digital single-frequency tone detection in presence of aliases The invention is a method for performing tone detection on a digital signal processor (DSP) that may be used in the presence of tone aliases caused by inadequate anti-aliasing filtering. The method involves processing an input signal at different sampling... | 06/08/1999 |
| 5765125 | Detection of tones while minimizing incorrect identification of other sounds as tones A first validation circuit utilizes residual energy unaccounted for by a linear predictive coding model for a specified order of model as a criteria on which to make a validity determination of whether a valid tone or digit has been received. A second val... | 06/09/1998 |
| 5353346 | Multi-frequency signal detector and classifier A method and apparatus for detecting and classifying signals that are the additive combination of a few constant-amplitude sinusoidal components, herein called N-tones. The attributes of this method and apparatus include provision of superior classificati... | 10/04/1994 |
| 5353344 | Method of determining levels at given frequencies of a VF signal A dialing receiver (1) for determining multifrequency dialing signals on an incoming signal in a telecommunication switching system, including a sampling circuit (4) for taking N values of the incoming signal at a given sampling rate, where N is a positiv... | 10/04/1994 |
| 5274579 | Digital tone detector A digital tone detector utilizes pseudo sinusoidal quadrature reference signals in combination with a unique summation rule for summing the resultant quadrature accumulations to obtain a substantial improvement in the sidelobe responses of the filter. The... | 12/28/1993 |
| 5251256 | Independent hysteresis apparatus for tone detection To detect tones for call progress monitoring, hysteresis apparatus is provided whereby the output of a typical tone detector such as a comparator operating in conjunction with a selective filter is monitored by a counter. The counter is incremented and de... | 10/05/1993 |
