Patents by Inventor Anibal J. Ferreira

Anibal J. Ferreira 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 two-component signal compression
    Patent number: 5592584
    Abstract: A method and apparatus for performing a Modified Discrete Cosine Transform on an audio signal is disclosed which utilizes a Discrete Fourier Transform. Illustratively, the MDCT spectral coefficients for the signal are generated from the real FFT spectral coefficients.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: January 7, 1997
    Assignee: Lucent Technologies Inc.
    Inventors: Anibal J. Ferreira, James D. Johnston