Patents by Inventor Robert Edward Malm

Robert Edward Malm 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).

  • Vocoder systems providing wave form analysis and synthesis using fourier transform representative signals
    Patent number: 4064363
    Abstract: A voice-excited vocoder analyzer divides the audio input signals into a baseband and upper band by deriving Fourier transform coefficients and transmitting the coefficients in a time-multiplex frame. The coefficients (a.sub.n and b.sub.n) are derived in two paths, each path multiplying the input signal by a stepped-frequency local source, (one sine, one cosine), the product feeding a recirculating shift register. The vocoder synthesizer effectively performs the same operations in reverse.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: December 20, 1977
    Assignee: Northrop Corporation
    Inventor: Robert Edward Malm