Patents by Inventor Francis Paul Carrubba

Francis Paul Carrubba 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).

  • High speed voice replay via digital delta modulation
    Patent number: 4091242
    Abstract: A method of and apparatus for time compression and changing the readout speed of a delta modulation encoded audio signal. The encoded audio signal has portions selectively deleted therefrom in accordance with detected zero crossovers of the same sign which occur in a predetermined timing sequence. The encoded audio signal which has had portions selectively deleted therefrom is decoded, with the undeleted decoded portions being joined. The undeleted portions have the same gain factor where joined, thereby eliminating step transients.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: May 23, 1978
    Assignee: International Business Machines Corporation
    Inventors: Francis Paul Carrubba, Walter Edgar Daniels, Jr., Peter Anthony Franaszek