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    HARMONIC BANDWIDTH EXTENSION OF AUDIO SIGNALS
    11.
    发明专利
    HARMONIC BANDWIDTH EXTENSION OF AUDIO SIGNALS 未知

    公开(公告)号：CA2936987A1

    公开(公告)日：2015-08-20

    申请号：CA2936987

    申请日：2015-02-10

    Applicant: QUALCOMM INC

    Inventor： SUBASINGHA SUBASINGHA SHAMINDA ,  KRISHNAN VENKATESH ,  ATTI VENKATRAMAN S ,  RAJENDRAN VIVEK

    IPC: G10L21/038

    Abstract: A method includes separating, at a device, an input audio signal into at least a low-band signal and a high-band signal. The low-band signal corresponds to a low-band frequency range and the high-band signal corresponds to a high-band frequency range. The method also includes selecting a non-linear processing function of a plurality of non-linear processing functions. The method further includes generating a first extended signal based on the low-band signal and the non-linear processing function. The method also includes generating at least one adjustment parameter based on the first extended signal, the high-band signal, or both.

    Sistemas y procedimientos para mitigar la inestabilidad potencial de tramas
    14.
    发明专利
    Sistemas y procedimientos para mitigar la inestabilidad potencial de tramas 未知

    公开(公告)号：ES2707888T3

    公开(公告)日：2019-04-05

    申请号：ES13770731

    申请日：2013-09-03

    Applicant: QUALCOMM INC

    Inventor： SUBASINGHA SUBASINGHA SHAMINDA ,  KRISHNAN VENKATESH ,  RAJENDRAN VIVEK

    IPC: G10L19/005 ,  G10L19/07

    Abstract: Un procedimiento para mitigar la inestabilidad potencial de tramas mediante un dispositivo electrónico, que comprende: obtener una trama actual de una señal de voz subsiguiente en el tiempo a una trama borrada; aplicar un vector de ponderación recibido a un vector de frecuencia espectral de línea final de la trama actual (527, 709) y a un vector de frecuencia espectral de línea final de la trama anterior (523, 707), para generar un vector de frecuencia espectral de línea media de la trama actual (525, 711); determinar si la trama actual es potencialmente inestable, en donde una trama potencialmente inestable tiene una o más características que indican un riesgo de producir una distorsión del habla; y aplicar un valor de ponderación sustituto en lugar del vector de ponderación recibido para generar un parámetro de trama estable si la trama actual es potencialmente inestable, en donde el valor de ponderación sustituto es un valor escalar mayor que 0 y menor que 1, y en donde el parámetro de trama estable es un vector de frecuencia espectral de línea media de la trama actual (525, 711), generado al aplicar el valor de ponderación sustituto al vector de frecuencia espectral de línea final de la trama actual (527, 709) y al vector de frecuencia espectral de línea final de la trama anterior (523, 707).

    Harmonic bandwidth extension of audio signals
    16.
    发明专利
    Harmonic bandwidth extension of audio signals 未知

    公开(公告)号：AU2015217340B2

    公开(公告)日：2018-05-31

    申请号：AU2015217340

    申请日：2015-02-10

    Applicant: QUALCOMM INC

    Inventor： SUBASINGHA SUBASINGHA SHAMINDA ,  KRISHNAN VENKATESH ,  ATTI VENKATRAMAN S ,  RAJENDRAN VIVEK

    IPC: G10L21/038

    Abstract: A method includes separating, at a device, an input audio signal into at least a low-band signal and a high-band signal. The low-band signal corresponds to a low-band frequency range and the high-band signal corresponds to a high-band frequency range. The method also includes selecting a non-linear processing function of a plurality of non-linear processing functions. The method further includes generating a first extended signal based on the low-band signal and the non-linear processing function. The method also includes generating at least one adjustment parameter based on the first extended signal, the high-band signal, or both.

    Encoder selection
    18.
    发明专利
    Encoder selection 未知

    公开(公告)号：AU2016244807A1

    公开(公告)日：2017-09-14

    申请号：AU2016244807

    申请日：2016-03-30

    Applicant: QUALCOMM INC

    Inventor： ATTI VENKATRAMAN S ,  CHEBIYYAM VENKATA SUBRAHMANYAM CHANDRA SEKHAR ,  RAJENDRAN VIVEK ,  SUBASINGHA SUBASINGHA SHAMINDA

    IPC: G10L19/20 ,  G10L25/27

    Abstract: A device includes a first classifier and a second classifier coupled to the first classifier. The first classifier is configured to output first decision data that indicates a classification of an audio frame as a speech frame or a non-speech frame, the first decision data determined based on first probability data associated with a first likelihood of the audio frame being the speech frame and based on second probability data associated with a second likelihood of the audio frame being the non-speech frame. The second classifier is configured to output second decision data based on the first probability data, the second probability data, and the first decision data, the second decision data includes an indication of a selection of a particular encoder of multiple encoders available to encode the audio frame.

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