Patents Examined by F. W. Isen
  • Patent number: 6898289
    Abstract: An active noise attenuation system (10) comprises a speaker (26) in communication with a flow body (78). The speaker (26) emits an output for attenuating noise from the flow body (78). A control unit (31) communicates with the speaker (26) and controls the output. A housing (14) has one volume (18) acting as a liquid storage chamber and another volume (22) acting as a speaker chamber.
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: May 24, 2005
    Assignee: Siemens VDO Automotive Inc.
    Inventors: James K. Vanderveen, Zhouxuan Xia
  • Patent number: 6859531
    Abstract: Real and imaginary components of the discrete Fourier transform (DFT) of the residual echo in an acoustic echo cancellation system are separately estimated using mapping functions derived without an assumption of statistical independence between separate components of a near-end microphone input signal. The residual echo estimator calculates the real and imaginary components using an approximation of the microphone input signal without the echo. A different approximation is used depending on whether the near-end talker and/or the far-end talker are talking.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: February 22, 2005
    Assignee: Intel Corporation
    Inventor: Michael E. Deisher
  • Patent number: 6853724
    Abstract: Cascade low-pass filters are useful in attenuating the xDSL band in a POTS splitter. The design of the low-pass filter is a sixth-order filter having two stages. A first stage includes a fourth-order filter, preferably with a stop-band frequency of approximately 48 kHz. A second stage includes a second-order filter in cascade with the fourth-order filter. For this filter, the stop-band frequency is preferably approximately 29 kHz. The inductance value of the second stage is relatively small in comparison to the inductance values of the first stage. In this manner, improvements in xDSL band attenuation are facilitated with little or no eroding of the voice band performance such as insertion loss, pass-band attenuation and return loss.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: February 8, 2005
    Assignee: ADC DSL Systems, Inc.
    Inventor: Jie Dong Wang
  • Patent number: 6839429
    Abstract: System and methods for determining an optimized transmit spectra (spectral distributions of transmission power) for a set of communications channels that experience cross-talk among themselves and for transmitting data on the channels. The transmit spectra are preferably constructed so that largely contiguous frequency bands are allocated to each signaling direction (upstream/downstream) on each communications channel and/or to each channel in the set of channels. In one embodiment, each communications channel is restricted to a maximum time-averaged power. The method preferably includes steps of determining the channel transfer functions of the communications channel, determining interference characteristics of the channels, calculating substantially optimal transmit spectra for the communications channels, and redistributing the frequency bins so that they are contiguously grouped in each transmit spectra. The contiguous groupings allow wider frequency bands for signaling in the channel.
    Type: Grant
    Filed: March 10, 1999
    Date of Patent: January 4, 2005
    Assignee: WM. Marsh Rice University
    Inventors: Rohit V. Gaikwad, Richard G. Baraniuk
  • Patent number: 6804566
    Abstract: The invention concerns a method for continuously controlling the quality of distributed digital sounds broadcast by radio or television on a digital channel. The method consists in temporally breaking down the digital signal into sequences of samples; carrying out a spectral analysis of each sequence to observe the variations in energy and envelope of the digital signal and calculating a global quality index; and in calculating on the basis of the global quality index, a final gated and continuous quality index representing the quality of the digital signals. The invention is applicable to the continuous control of the quality of distributed sounds.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: October 12, 2004
    Assignees: France Telecom, Telediffusion de France
    Inventors: Catherine Colomes, St├ęphane Pefferkorn, Thierry Alpert, Eric Monteux
  • Patent number: 6804359
    Abstract: A signal processor for reducing undesirable signal content reduces the undesirable signal content by exaggerating the undesirable signal content and then using this exaggerated undesirable signal and adaptive filter means to estimate the undesirable content in the signal and then substantially removing it from the signal. The signal processor includes a signal mapping means for exaggerating the undesirable signal content; and an adaptive filter means for reducing the undesirable signal content using the exaggerated undesirable signal content.
    Type: Grant
    Filed: August 3, 1998
    Date of Patent: October 12, 2004
    Assignee: Skyworks Solutions, Inc.
    Inventors: Li Yu, Martin Snelgrove
  • Patent number: 6798878
    Abstract: A design for passively cooled telecommunication repeater housings for use in wire transmission in the local loop outside plant provides mounting slots for repeaters and voltage protector assemblies disposed and arranged such that a repeater and its voltage protector assembly can be removed independently of each other by pulling either one in the same direction.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: September 28, 2004
    Assignee: Anacapa Technology, Inc.
    Inventor: Erich K. Laetsch
  • Patent number: 6792114
    Abstract: A digital hearing aid according to the present invention is capable of measuring its own performance. The hearing aid includes a test signal generator for feeding a test signal into the hearing aid amplifier. The response to the test signal is acquired at a specific point in the hearing aid, depending upon what aspect of performance is to be measured. Various elements of the hearing aid and/or the hearing aid feedback may be bypassed. The hearing aid further includes the capability of initializing hearing aid parameters based upon the performance measurements. The measurement and initialization capability may be entirely integral to the hearing aid, or an external processor may be used to download the measurement program and the run time program, and assist in computing the parameters.
    Type: Grant
    Filed: October 6, 1999
    Date of Patent: September 14, 2004
    Assignee: GN ReSound A/S
    Inventors: James Mitchell Kates, John Laurence Melanson, Eric Lindemann
  • Patent number: 6785382
    Abstract: In a speakerphone system, the signal that is directed to a loudspeaker is filtered by a dynamically controllable highpass filter. The filter characteristics are adjusted on the basis of the power of the signal and the degree of recent microphone activity. The filtered signal is a far-talker signal, while the microphone activity is represented as a near-talker signal that includes an echo component as a consequence of loudspeaker-to-microphone coupling. The degree of microphone activity is determined by a subband analyzer. A noise floor estimator may be used to determine the degree to which the near-talker signal is comprised of background noise, so that the noise can be eliminated in the process of controlling the highpass filter.
    Type: Grant
    Filed: January 8, 2002
    Date of Patent: August 31, 2004
    Assignee: Signalworks, Inc.
    Inventors: Hugh J. McLaughlin, Tamara L. Logan, Jeff L. Schenck
  • Patent number: 6782095
    Abstract: 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 consideration other common tones such as Calling Card Service Prompt and Recall Dial. Through the use of the Discrete Fourier Transform (DFT) on small time windows and by providing phase continuity between these windows, the results of the successive DFTs may be combined and processed by a second DFT computation. This second DFT allows higher frequency resolution without requiring the re-computation of the DFT from the time samples. The resulting effect is a tone receiver with both high time and frequency resolution which consequently leads to robust and accurate tone recognition systems conforming even to the most stringent specification while maintaining low computational requirements.
    Type: Grant
    Filed: July 27, 1999
    Date of Patent: August 24, 2004
    Assignee: Nortel Networks Limited
    Inventors: Michael Leong, Yuriy Zakharov, Sergey Fedorov, Galina Titova
  • Patent number: 6775384
    Abstract: The air induction system comprises an air induction body with a mouth and a speaker forming an interface with the mouth. A fender portion of a vehicle at least partially covers the interface, protecting the interface from environmental conditions. A control unit controls with the speaker to thereby generate a noise attenuating sound.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: August 10, 2004
    Assignee: Siemens VDO Automotive Inc.
    Inventors: Ian R. McLean, James K. Vanderveen, Zhouxuan Xia
  • Patent number: 6772022
    Abstract: A method of converting between a sampling rate associated with a first audio format and a second audio format includes up-sampling an input signal sampled at the sample rate associated with the first audio format. Then, the up-sampled signal is filtered as a function of a fractional delay to generate an output signal sampled at the sample rate associated with the second audio format. The fractional delay is computed from the sample rates associated with the first and second audio formats. In one embodiment, the sample rates that are converted between are associated with a compact disc format having a sample rate of about 44.1 kHz and a digital audio tape format having a sample rate of about 48 kHz. In such case, the input samples are preferably up-sampled by a factor of two and the samples are then preferably filtered in accordance with a third order six taps coefficient finite impulse response filtering technique.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: August 3, 2004
    Assignee: Agere Systems, Inc.
    Inventors: Cecil William Farrow, Yhean-Sen Lai, Kannan Rajamani
  • Patent number: 6766017
    Abstract: A dialing method in a mobile phone in which frequently used telephone numbers are stored in a first memory of the phone and less frequently used telephone numbers are stored in a second memory. Upon reception of input data comprising one or more digits from the phone keypad, the method searches the first memory for a stored telephone number that has a portion matching the input data. If a matching telephone number is found, it is displayed on the telephone display. If no matches are found in the first memory, a search of the second memory is performed to determine if a matching telephone number is stored therein. Whenever a matching telephone number from the first or second memory is displayed, the displayed number is automatically dialed upon reception of a command from the user, e.g., upon detection of a SEND key input.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: July 20, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jae-Duk Yang
  • Patent number: 6766033
    Abstract: A modular audio loudspeaker array system. The system includes a first speaker module, and a second speaker module, constructed and arranged to radiate sound waves responsive to audio signals. Sound waves radiated by the first speaker module and the sound waves radiated by the second speaker module combine to form a radiation pattern. The system further includes a positioning system, for positioning the first bass module relative to the second bass module at a plurality of fixed predetermined distances; an audio signal input terminal electronically for coupling the loudspeaker array to a source of the audio signals for receiving the audio signals; an audio signal processing device, electronically coupling the audio signal input terminal to the first bass module and to the second bass module, for processing the audio signals and transmitting the audio signals to the first speaker module and to the second loudspeaker module.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: July 20, 2004
    Assignee: Bose Corporation
    Inventors: Morten Jorgensen, Christopher B. Ickler
  • Patent number: 6763099
    Abstract: An advanced three way call detection system which measures delay times associated with multiple echoes of a reference signal transmitted over a two way call. A reference signal is initially transmitted over a two way call when a two way connection is first established between a local telephone and a remote telephone. The echo characteristics of the two way connection are measured and recorded in an initial echo profile. The initial echo profile represents the number of and timing of each detected echo of the reference signal after transmission of the reference signal over the two way call when the two way connection is first established. The reference signal is then continuously transmitted at various timing intervals during the telephone conversation and the incoming line is sampled in order to detect echoed versions of the reference signal in order to create subsequent echo profiles.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: July 13, 2004
    Assignee: T-Netix, Inc.
    Inventor: Russell Blink
  • Patent number: 6760449
    Abstract: A microphone array system includes a plurality of microphones and a sound signal processing part. The microphones are arranged in such a manner that at least three microphones are arranged in a first direction to form a microphone row, at least three rows of the microphones are arranged so that the microphone rows are not crossed each other so as to form a plane, and at least three layers of the planes are arranged three-dimensionally so that the planes are not crossed each other, so that the boundary conditions for the sound estimation at each plane of the planes constituting the three dimension can be obtained.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: July 6, 2004
    Assignee: Fujitsu Limited
    Inventor: Naoshi Matsuo
  • Patent number: 6760436
    Abstract: An echo canceling apparatus includes a long-response echo canceler that removes an echo of an incoming signal from an outgoing signal by operating on a most recent segment of the incoming signal, stored in a tapped delay unit. The apparatus has a control unit that calculates a cancellation characteristic for each tap of the tapped delay unit. The cancellation characteristics are used to select a subset of taps corresponding to a changing component of the echo, the subset being empty if there is no changing component. A short-response echo canceler, operating on the outputs of the selected taps, cancels the changing component of the echo left uncanceled by the long-response echo canceler. Alternatively, the step gain of the selected taps is increased. The short-response echo canceler is preferably disabled in the double-talk state.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: July 6, 2004
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Masashi Takada
  • Patent number: 6760635
    Abstract: Apparatus, article of manufacture, and method for automatic adjustment of sound reproduction settings on an audio or audio/visual system based on listener preference and/or experience is provided. In one embodiment, an audio system includes an apparatus for adjusting an output parameter of the audio system, the apparatus comprising: a memory for storing a stored output parameter setting associated with an audio program being played on the audio system; and a processor configured to: determine whether a stored output parameter setting is associated with an audio program being processed on the audio system; if the stored output parameter setting is associated with the audio program, compare the stored output parameter setting to a saved output parameter setting; and if the stored output parameter setting is greater than the saved output parameter setting, change the output parameter to the stored output parameter setting.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: July 6, 2004
    Assignee: International Business Machines Corporation
    Inventors: Cary Lee Bates, Jeffrey Michael Ryan, John Matthew Santosuosso
  • Patent number: 6760433
    Abstract: Techniques for interfacing a telephone line and central office equipment of a network operator providing and digital subscriber line data services are disclosed. The interface is splitterless in that no conventional bulky splitter is required. A SLIC independent, impedance synthesis network provide compensation for impedance imbalance caused by capacitor coupled across two-wire interface of voice circuit.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: July 6, 2004
    Assignee: Centillium Communications, Inc.
    Inventors: Mark A. Bolla, Serdar Kiykioglu
  • Patent number: 6757384
    Abstract: Echoes caused by discontinuities in a telecommunications transmission lines cause double talk which cause divergence problems with echo cancellers. Divergence problems in echo cancellers cause considerable problems in interactive caller response systems, they cause less problems if all parties to a call are human. One of the biggest problems is the effect of the echoes on automatic speech recognition systems. The echo canceller method and system presented cancels echoes to reduce their interference with ASR and yet provides stability in the presence of double talk.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: June 29, 2004
    Assignee: Lucent Technologies Inc.
    Inventors: Richard Harry Ketchum, Anand Rangaswamy Setlur