Patents by Inventor James E. Paul

James E. Paul has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4642583
    Abstract: In a companding arrangement, the presence of a tone in only one of the two transmission directions is detected. Upon such detection, for example during set-up of a telephone call via a satellite transmission channel, the tone is compressed or expanded, depending on its transmission direction, separately from the remainder of the signal using a second compander. Companding is thus effected using two companders operating at different amplitude levels, with a consequent noise level reduction. A single bandpass filter is used to separate the detected tone, switches being controlled by the tone detection to couple the bandpass filter selectively for operation in either transmission direction.
    Type: Grant
    Filed: December 19, 1984
    Date of Patent: February 10, 1987
    Assignee: Northern Telecom Limited
    Inventors: Dermot T. Fucito, James E. Paul, Milan Markovic
  • Patent number: 4179693
    Abstract: An autonomous navigational system for an airborne vehicle is disclosed which automatically updates its position and heading coordinates at each of a plurality of checkpoints along a preselected flight path. Prestored in a memory of the navigational system is a plurality of reference map images respectively associated with the plurality of checkpoints. Each reference map image is comprised of a plurality of terrain features associated with the terrain about an associated checkpoint. In operation, an acquisition unit senses an image of local terrain at each checkpoint. The relative sizes of reference and sensed map images vary with the mission requirements. A terrain feature extractor detects a plurality of terrain features contained in the sensed map image.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: December 18, 1979
    Assignee: Rockwell Internation Corporation
    Inventors: Gregory W. Evans, James E. Paul
  • Patent number: 4177430
    Abstract: A receiving system is described which has the capability of substantially cancelling broadband noise, such as impulse noise, atmospheric noise, electrical line noise and receiver front end noise, from a selected radio frequency passband. In a first embodiment, a desired radio frequency passband is selected and converted to a broadband intermediate frequency (IF) signal, which is applied in parallel to the inputs of first and second frequency channels. When broadband noise is present in the broadband IF signal, the first frequency channel develops a desired audio signal in the presence of an undesired first broadband noise signal, while the second frequency channel develops an undesired second broadband noise signal which is correlated with the first broadband noise signal. An adaptive transversal filter is responsive to the second broadband noise signal and to an output signal for adaptively developing an estimate of the first broadband noise.
    Type: Grant
    Filed: March 6, 1978
    Date of Patent: December 4, 1979
    Assignee: Rockwell International Corporation
    Inventor: James E. Paul
  • Patent number: 4081607
    Abstract: A system for detecting one or more keywords in continuous speech is disclosed wherein a speech processor extracts a plurality of analog speech parameters from the input continuous speech, an STV (Spectral Time Vector) generator circuit selectively converts the plurality of analog speech parameters into digitized spectral parameters, an asynchronous correlation circuit continuously correlates sequences of the digitized spectral parameters with stored reference mask templates representative of subelements (dyads or triads) of one or more desired keywords in order to produce continuous correlation data, and a decision function circuit is responsive to the correlation data for developing an occurrence decision output for each desired keyword that is detected.
    Type: Grant
    Filed: November 1, 1976
    Date of Patent: March 28, 1978
    Assignee: Rockwell International Corporation
    Inventors: Visvaldis A. Vitols, James E. Paul, Jr.
  • Patent number: 4052559
    Abstract: Noise such as hum (whose components are self-correlated over a long time-interval) is estimated (separated) from Signal such as speech (whose components are self-correlated only over a short time-interval) by using a time-domain transversal filter, whose tap-weight coefficients may be fixed (Wiener filter) or variable (Adaptive filter). A combiner combines the estimated noise and original input signal to develop an output speech signal free of noise. The output speech may by further applied to a spectrum shaper to restore a natural shape.
    Type: Grant
    Filed: December 20, 1976
    Date of Patent: October 4, 1977
    Assignee: Rockwell International Corporation
    Inventors: James E. Paul, Visvaldis A. Vitols
  • Patent number: 4000369
    Abstract: Apparatus for reducing (a) background noise in a signal channel, and (b) channel gain variations, useful with spectral analysis equipment. Two feed forward circuits are disclosed: one to enhance a signal in noise (deriving an estimated signal); the other for AGC (relative to a preselected level). Background noise is estimated as a bias level corresponding to a minimum signal level detected within a preselected interval, the duration of such interval corresponding to a spectral interval of interest. Such noise estimate is then subtracted from the noisy signal of interest to provide a compensatorily biased signal or estimated signal. The compensatorily biased or estimated signal is then subjected to compensatory gain control by employing the ratio of a reference level to a peak detected level occurring within the preselected time interval as a gain control signal.
    Type: Grant
    Filed: December 5, 1974
    Date of Patent: December 28, 1976
    Assignee: Rockwell International Corporation
    Inventors: James E. Paul, Jr., Visvaldis A. Vitols