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    Ocultación de error de trama
    31.
    发明专利
    Ocultación de error de trama 未知

    公开(公告)号：ES2816014T3

    公开(公告)日：2021-03-31

    申请号：ES18191125

    申请日：2013-11-12

    Applicant: ERICSSON TELEFON AB L M

    Inventor： NÄSLUND SEBASTIAN ,  SVEDBERG JONAS ,  GRANCHAROV VOLODYA

    IPC: G10L19/005

    Abstract: Un método de ocultación de pérdida de tramas realizado por un decodificador de audio, comprendiendo, el método: analizar (S11) los cambios de signo de los coeficientes de transformada en las tramas recibidas mediante la determinación de un número de cambios de signo entre los coeficientes de transformada correspondientes en subvectores correspondientes de tramas consecutivas no erróneas que no cuentan con una transitoria, comprendiendo, cada subvector, múltiples coeficientes de una banda de frecuencia; acopiar (S12) el número de cambios de signo en los subvectores correspondientes a través de un número predeterminado de tramas consecutivas no erróneas que no cuentan con una transitoria; y reconstruir (S13) una trama perdida copiando los coeficientes de transformada de una trama no errónea anterior, y, si al menos dos tramas consecutivas no erróneas previas inmediatamente anteriores a la trama perdida no cuentan con una transitoria: invertir los signos de los coeficientes de transformada en los subvectores que tengan un número acopiado de cambios de signo que sea igual o superior a un umbral predeterminado.

    METHOD AND APPARTUS FOR CONTROLLING AUDIO FRAME LOSS CONCEALMENT
    32.
    发明专利
    METHOD AND APPARTUS FOR CONTROLLING AUDIO FRAME LOSS CONCEALMENT 未知

    公开(公告)号：AU2018203449B2

    公开(公告)日：2020-01-02

    申请号：AU2018203449

    申请日：2018-05-16

    Applicant: ERICSSON TELEFON AB L M

    Inventor： BRUHN STEFAN ,  SVEDBERG JONAS

    IPC: G10L19/005

    Abstract: Abstract In accordance with an example embodiment of the present invention, disclosed is a method and an apparatus thereof for controlling a concealment method for a lost audio 5 frame of a received audio signal. A method for a decoder of concealing a lost audio frame comprises detecting in a property of the previously received and reconstructed audio signal, or in a statistical property of observed frame losses, a condition for which the substitution of a lost frame provides relatively reduced quality. In case such a condition is detected, the concealment method is modified by selectively adjusting a 10 phase or a spectrum magnitude of a substitution frame spectrum. Detect a condition in a property> Condition detected Modify concealment method

    METHOD AND APPARATUS FOR CONTROLLING AUDIO FRAME LOSS CONCEALMENT
    34.
    发明专利
    METHOD AND APPARATUS FOR CONTROLLING AUDIO FRAME LOSS CONCEALMENT 未知

    公开(公告)号：PH12018500083B1

    公开(公告)日：2019-06-10

    申请号：PH12018500083

    申请日：2018-01-09

    Applicant: ERICSSON TELEFON AB L M

    Inventor： BRUHN STEFAN ,  SVEDBERG JONAS

    IPC: G10L19/005

    Abstract: In accordance with an example embodiment of the present invention, disclosed is a method and an apparatus thereof for controlling a concealment method for a lost audio frame of a received audio signal. A method for a decoder of concealing a lost audio frame comprises detecting in a property of the previously received and reconstructed audio signal, or in a statistical property of observed frame losses, a condition for which the substitution of a lost frame provides relatively reduced quality. In case such a condition is detected, the concealment method is modified by selectively adjusting a phase or a spectrum magnitude of a substitution frame spectrum.

    METHOD AND APPARATUS FOR CONTROLLING AUDIO FRAME LOSS CONCEALMENT
    40.
    发明专利
    METHOD AND APPARATUS FOR CONTROLLING AUDIO FRAME LOSS CONCEALMENT 未知

    公开(公告)号：HK1210315A1

    公开(公告)日：2016-04-15

    申请号：HK15110858

    申请日：2015-11-03

    Applicant: ERICSSON TELEFON AB L M

    Inventor： BRUHN STEFAN ,  SVEDBERG JONAS

    IPC: G10L20060101

    Abstract: Disclosed is a method and an apparatus for adaptation of a frame loss concealment method in audio decoding. The method comprises analyzing a previously received audio signal to perform a frequency selective transient detection on the basis of frequency bands and modifying the frame loss concealment method by frequency band selectively adjusting a spectrum magnitude of a substitution frame spectrum in response to a transient detected in the frequency band. The method further comprises detecting a burst loss and further modifying the concealment method by selectively adjusting a magnitude of a substitution frame spectrum in response to detected burst loss.

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