Patents by Inventor Rogerio G. Alves

Rogerio G. Alves 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).

  • Noise reduction in subbanded speech signals
    Publication number: 20040078200
    Abstract: The presence of speech in a filtered speech signal is detected for the purpose of suspending noise level calculations during periods of speech. A received speech signal is split into a plurality of subband signals. A subband variable gain is determined for each subband based on an estimation of the noise level in the received voice signal and on an envelope of the received signal in each subband. Each subband signal is multiplied by the subband variable gain for that subband. The subband signals are combined to produce an output voice signal.
    Type: Application
    Filed: October 17, 2002
    Publication date: April 22, 2004
    Applicant: Clarity, LLC
    Inventor: Rogerio G. Alves