Patents by Inventor Jont Brandon Allen

Jont Brandon Allen 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).

  • Method and apparatus for cancelling room reverberation and noise pickup
    Patent number: 4066842
    Abstract: Room reverberation and other uncorrelated signal sources characteristic of monaural systems are removed, in accordance with the principles of this invention, by employing two microphones at the sound source and by manipulating the signals of the two microphones to develop a single nonreverberant signal. Both early echoes and late echoes in the signal received by each microphone are removed by manipulating the signals of the two microphones in the frequency domain. Corresponding frequency samples of the two signals are co-phased and added and the magnitude of each resulting frequency sample is modified in accordance with the computed cross-correlation between the corresponding frequency samples. The modified frequency samples are combined and transformed to form the nonreverberant or correlated signal portion.
    Type: Grant
    Filed: April 27, 1977
    Date of Patent: January 3, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Jont Brandon Allen