Patents by Inventor Alexis P. Bernard

Alexis P. Bernard 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).

  • Middle-end solution to robust speech recognition
    Patent number: 7516069
    Abstract: A method for performing time and frequency Signal-to-Noise Ratio (SNR) dependent weighting in speech recognition is described that includes for each period t estimating the SNR to get time and frequency SNR information ?t,f; calculating the time and frequency weighting to get ?tf; performing the back and forth weighted time varying DCT transformation matrix computation MGtM?1 to get Tt; providing the transformation matrix Tt and the original MFCC feature ot that contains the information about the SNR to a recognizer including the Viterbi decoding; and performing weighted Viterbi recognition bj(ot).
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: April 7, 2009
    Assignee: Texas Instruments Incorporated
    Inventors: Alexis P. Bernard, Yifan Gong
  • Noise-resistant utterance detector
    Patent number: 7451082
    Abstract: A method and detector for providing a noise resistant utterance detector is provided by extracting a noise estimate (15) to augment the signal-to-noise ratio of the speech signal, inverse filtering (17) of the speech signal to focus on the periodic excitation part of the signal and spectral reshaping (19) to accentuate separation between formants.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: November 11, 2008
    Assignee: Texas Instruments Incorporated
    Inventors: Yifan Gong, Alexis P. Bernard
  • Automatic language independent triphone training using a phonetic table
    Patent number: 7289958
    Abstract: A method for training acoustic models for a new target language is provided using a phonetic table, which characterizes the phones, used in one or more reference language(s) with respect to their articulatory properties; a phonetic table, which characterizes the phones used in the target language with respect to their articulatory properties; a set of trained monophones for the reference language(s); and a database of sentences in the target language and its phonetic transcription. With these inputs, the new method completely and automatically takes care of the steps of monophone seeding and triphone clustering and machine intensive training steps involved in triphone acoustic training.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: October 30, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Alexis P. Bernard, Lorin P. Netsch
  • Method to extend operating range of joint additive and convolutive compensating algorithms
    Patent number: 7236930
    Abstract: The operating range of joint additive and convolutive compensating method is extended by enhanced channel estimation procedure that adds SNR-dependent inertia and SNR-dependent limit on the channel estimate.
    Type: Grant
    Filed: April 12, 2004
    Date of Patent: June 26, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Alexis P. Bernard, Yifan Gong
  • Algebraic codebook system and method
    Patent number: 6847929
    Abstract: Code-excited linear prediction speech encoders/decoders with excitation including an algebraic codebook contribution encoded with a single sign bit for each track of pulses by inferring pulse amplitude signs from the pulse position code ordering within a codeword.
    Type: Grant
    Filed: October 3, 2001
    Date of Patent: January 25, 2005
    Assignee: Texas Instruments Incorporated
    Inventor: Alexis P. Bernard
  • Algebraic codebook system and method
    Publication number: 20020111799
    Abstract: Code-excited linear prediction speech encoders/decoders with excitation including an algebraic codebook contribution encoded with a single sign bit for each track of pulses by inferring pulse amplitude signs from the pulse position code ordering within a codeword.
    Type: Application
    Filed: October 3, 2001
    Publication date: August 15, 2002
    Inventor: Alexis P. Bernard