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    Vector quantizer method and apparatus
    22.
    发明专利
    Vector quantizer method and apparatus 未知

    公开(公告)号：GB2282943A

    公开(公告)日：1995-04-19

    申请号：GB9422823

    申请日：1994-03-07

    Applicant: MOTOROLA INC

    Inventor： GERSON IRA A ,  JASIUK MARK A ,  HARTMAN MATTHEW A

    IPC: G10L19/06 ,  G10L19/083 ,  G10L19/135 ,  G10L25/06 ,  G10L25/24 ,  G10L9/00

    Abstract: A Vector-Sum Excited Linear Predictive Coding (VSELP) speech coder (200) provides improved quality and reduced complexity over a typical speech coder. VSELP uses a codebook (201) which has a predefined structure such that the computations required for the codebook search process can be significantly reduced. This VSELP speech coder uses single or multisegment vector quantizer of the reflection coefficients based on a Fixed-Point-Lattice-Technique (FLAT). Additionally, this speech coder uses a pre-quantizer to reduce the vector codebook search complexity and a high-resolution scalar quantizer to reduce the amount of memory needed to store the reflection coefficient vector codebooks. Resulting in a high quality speech coder with reduced computations and storage requirements.

    Vector sum excited linear predictive coding speech coder
    23.
    发明专利
    Vector sum excited linear predictive coding speech coder 未知

    公开(公告)号：FR2709387A1

    公开(公告)日：1995-03-03

    申请号：FR9410203

    申请日：1994-08-23

    Applicant: MOTOROLA INC

    Inventor： GERSON IRA A ,  JASIUK MARK A ,  HARTMAN MATTHEW A

    IPC: G10L19/06 ,  G10L19/083 ,  G10L19/135 ,  G10L25/06 ,  G10L25/24 ,  H04B7/24 ,  G10L9/14 ,  G10L9/18 ,  H04B7/00

    Abstract: The method comprises the steps of segmenting the optimal reflection coefficient vector into two segments, and providing an array of predetermined vectors of coefficients, with each vector having multiple elements. A first vector is selected from the array. The residual error is calculated corresp. to the first selected vector. The above steps are repeated for each vector in the array. A vector is chosen from the first array with the lowest residual error, which defines the initial conditions for the second segment. A second array of predetermined vectors of reflection coefficients are provided, each vector having multiple elements. The above steps are repeated for the second segment, using the second array of vectors so forming a second chosen vector.

    METODO Y APARATO PARA CARACTERIZAR RUIDO DE INHALACION Y CALCULAR PARAMETROS BASADOS EN LA CARACTERIZACION.
    27.
    发明专利
    METODO Y APARATO PARA CARACTERIZAR RUIDO DE INHALACION Y CALCULAR PARAMETROS BASADOS EN LA CARACTERIZACION. 未知

    公开(公告)号：MXPA06015231A

    公开(公告)日：2007-03-26

    申请号：MXPA06015231

    申请日：2005-06-09

    Applicant: MOTOROLA INC

    Inventor： KUSHNER WILLIAM M ,  HARTON SARA M ,  JASIUK MARK A

    IPC: G10L15/06 ,  G10L21/00

    Abstract: Un metodo para caracterizar ruido de inhalacion dentro de un sistema de distribucion de aire presurizado, el metodo incluye las etapas de: generar un modelo (912, 1012) de ruido de inhalacion basado en el ruido de inhalacion; recibir una senal de (802) de entrada que incluye ruido de inhalacion que comprende por lo menos una rafaga del ruido de inhalacion; comparar (810) la senal de entrada con el modelo de ruido para obtener una medida de similitud; comparar la medida de similitud con por lo menos un umbral (832, 834) para detectar por lo menos una rafaga de ruido de inhalacion; y caracterizar (1354, 1356) por lo menos una rafaga de ruido de inhalacion detectada.

    28.
    发明专利
    未知

    公开(公告)号：AT329347T

    公开(公告)日：2006-06-15

    申请号：AT03745516

    申请日：2003-02-14

    Applicant: MOTOROLA INC

    Inventor： RAMABADRAN TENKASI V ,  SMITH AARON M ,  JASIUK MARK A

    IPC: G10L19/06 ,  G10L19/08 ,  G10L19/02 ,  G10L19/04

    Abstract: A system or method for modeling a signal, such as a speech signal, in which harmonic frequencies and amplitudes are identified and the harmonic magnitudes are interpolated to obtain spectral magnitudes at a set of fixed frequencies. An inverse transform is applied to the spectral magnitudes to obtain a pseudo auto-correlation sequence, from which linear prediction coefficients are calculated. From the linear prediction coefficients, model harmonic magnitudes are generated by sampling the spectral envelope defined by the linear prediction coefficients. A set of scale factors are then calculated as the ratio of the harmonic magnitudes to the model harmonic magnitudes and interpolated to obtain a second set of scale factors at the set of fixed frequencies. The spectral envelope magnitudes at the set of fixed frequencies are multiplied by the second set of scale factors to obtain new spectral magnitudes and the process is iterated to obtain final linear prediction coefficients. The signal is modeled by the linear prediction coefficients.

    Method and apparatus for detecting and attenuating inhalation noise in a communication system
    30.
    发明专利
    Method and apparatus for detecting and attenuating inhalation noise in a communication system 未知

    公开(公告)号：AU2005262624A1

    公开(公告)日：2006-01-19

    申请号：AU2005262624

    申请日：2005-06-06

    Applicant: MOTOROLA INC

    Inventor： KUSHNER WILLIAM M ,  JASIUK MARK A ,  HARTON SARA M

    IPC: G10L21/02 ,  H04B15/00

    Abstract: A method for detecting and attenuating inhalation noise in a communication system coupled to a pressurized air delivery system, the method including the steps of: generating an inhalation noise model ( 912, 1012 ) based on inhalation noise; receiving an input signal ( 802 ) that includes inhalation noise; comparing ( 810 ) the input signal to the noise model to obtain a similarity measure; determining ( 854 ) a gain factor based on the similarity measure; and modifying ( 852 ) the input signal based on the gain factor, wherein the inhalation noise in the input signal is attenuated based on the gain factor.

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