Patents by Inventor David Sher

David Sher 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).

  • Apparatus for utilizing a discrete fourier transformer to implement a discrete cosine transformer
    Patent number: 5258941
    Abstract: An apparatus for utilizing a discrete Fourier transformer to implement a discrete cosine transformer is disclosed. This apparatus contains a first scrambler for rearranging a first real input data stream, a second scrambler for rearranging a second real input data stream, and a convertor for converting a complex data stream output from a Discrete Fourier Transformer into two streams of discrete cosine transformed data.
    Type: Grant
    Filed: December 13, 1991
    Date of Patent: November 2, 1993
    Assignee: Edward Newberger
    Inventors: Edward Newberger, David Sher