公开(公告)号：AU2020200577B2

公开(公告)日：2021-08-05

申请号：AU2020200577

申请日：2020-01-28

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

公开(公告)号：PL3555885T3

公开(公告)日：2021-01-11

申请号：PL17816811

申请日：2017-12-15

Applicant: ERICSSON TELEFON AB L M

Inventor： SVEDBERG JONAS ,  SEHLSTEDT MARTIN ,  BRUHN STEFAN

IPC: G10L19/038

公开(公告)号：ES2784620T3

公开(公告)日：2020-09-29

申请号：ES14805696

申请日：2014-11-06

Applicant: ERICSSON TELEFON AB L M

Inventor： JANSSON TOFTGÅRD TOMAS ,  SVEDBERG JONAS ,  GRANCHAROV VOLODYA

IPC: H03M7/30 ,  G10L19/038

Abstract: Un método de codificación de audio que comprende la partición de vectores de entrada de coeficientes que se originan a partir de la señal de audio para la codificación posicional de formas de los vectores de entrada, en donde dicha codificación posicional comprende la cuantificación de vector de segmentos de un vector de entrada individualmente y en donde un número máximo de bits permitidos para cuantificar un segmento de vector está restringido por un cuantificador de vector, en donde dicho método comprende: - obtener (210) el vector de entrada; - segmentar (220) dicho vector de entrada en un número entero, NSEG, de segmentos del vector de entrada según una relación entre un presupuesto total de bits para cuantificar el vector de entrada y un número máximo de bits permitidos para cuantificar un segmento de vector; - determinar (230) una representación de una diferencia de energía relativa respectiva entre partes de dicho vector de entrada en cada lado de cada límite entre dichos segmentos del vector de entrada: - a) estableciendo (231) dicho vector de entrada como vector de entrada de nivel superior; - b) dividiendo (233) el vector de entrada de nivel superior en partes izquierda y derecha, cada parte que comprende uno o más segmentos del vector de entrada, en donde el vector de entrada de nivel superior se divide en el límite del segmento entre dicha parte izquierda y dicha parte derecha en dos vectores de entrada de nivel inferior; - c) calculando (234) una representación de una diferencia de energía relativa entre dichos dos vectores de entrada de nivel inferior según una relación de energía entre dichos vectores de entrada de nivel inferior; y - d) repitiendo (236) dichos pasos b) y c) de división y cálculo restableciendo dichos vectores de entrada de nivel inferior como vector de entrada de nivel superior respectivo, hasta que todos los límites entre segmentos del vector de entrada se provean con una representación asociada de una diferencia de energía relativa; - asignar (240) bits para codificar la forma de cada uno de dicho segmento del vector de entrada y para la codificación de dichas representaciones de dichas diferencias de energía relativa entre dichos segmentos del vector de entrada, en donde los bits para codificar los segmentos del vector de entrada se distribuyen entre segmentos según las diferencias de energía relativa entre partes de dicho vector de entrada; y - proporcionar (250) cada uno de dichos segmentos del vector de entrada, dichas representaciones de dichas diferencias de energía relativas e información de asignación al cuantificador para la codificación individual de dichos segmentos del vector de entrada.

公开(公告)号：DK3066760T3

公开(公告)日：2020-04-20

申请号：DK14805696

申请日：2014-11-06

Applicant: ERICSSON TELEFON AB L M

Inventor： GRANCHAROV VOLODYA ,  JANSSON TOFTGÅRD TOMAS ,  SVEDBERG JONAS

IPC: H03M7/30 ,  G10L19/038

公开(公告)号：NZ746512A

公开(公告)日：2020-02-28

申请号：NZ74651214

申请日：2014-01-22

Applicant: ERICSSON TELEFON AB L M

Inventor： SVEDBERG JONAS ,  BRUHN STEFAN

IPC: G10L19/005 ,  G10L19/025

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 wherein a segment from a previously received or reconstructed audio signal is used as a prototype frame in order to create a substitution frame for a lost audio frame. The method comprises transforming the prototype frame into a frequency domain; analyzing a previously reconstructed signal frame and frame loss statistics to detect predetermined conditions, wherein said conditions comprise detected transient and burst losses with several consecutive frame losses; if said conditions are not detected, applying the first concealment method, wherein the first concealment method comprises: applying a sinusoidal model to the prototype frame to identify a frequency of a sinusoidal component of the audio signal, calculating a phase shift θk for the sinusoidal component and phase shifting the sinusoidal component by θk; if said conditions are detected, applying a second concealment method, wherein the second concealment method comprises: adapting the first concealment method by selectively adjusting a magnitude of the prototype frame spectrum; and creating the substitution frame by performing an inverse frequency transform of a frequency spectrum of the prototype frame.

公开(公告)号：AU2020200577A1

公开(公告)日：2020-02-13

申请号：AU2020200577

申请日：2020-01-28

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

公开(公告)号：AU2017265085B2

公开(公告)日：2019-07-11

申请号：AU2017265085

申请日：2017-11-23

Applicant: ERICSSON TELEFON AB L M

Inventor： SVEDBERG JONAS

IPC: G10L19/038 ,  H03M7/30

Abstract: An encoder and a method therein for Pyramid Vector Quantizer, PVQ, shape search, the PVQ taking a target vector x as input and deriving a vector y by iteratively adding unit pulses in an inner dimension search loop. The method comprises, before 5 entering a next inner dimension search loop for unit pulse addition, determining, based on the maximum pulse amplitude, maxampy, of a current vector y, whether more than a current bit word length is needed to represent enloopy, in a lossless manner in the upcoming inner dimension loop. The variable enloopy is related to an accumulated energy of the vector y. The performing of this method enables the 0 encoder to keep the complexity of the search at a reasonable level. For example, it enables the encoder to apply an increased precision loop only when it may be needed, by analyzing whether the "worst case scenario" in the upcoming inner loop would require an inner loop with a higher precision than the one currently used. 5 (Figure 1) Determine word length for enloopy for next inner loop, based on maxampy 102 Run inner loop with determined word length i for enloopy (selected precision loop) 103 L - --------- I Update maxampy after addition of pulse 104 in inner loop Figure 1 Keep track of/Determine maxampy 201 Determine xabsmax 202 - - -- - Determine max upshift of corrxy for next inner loop, based on xabsmax 203 Determine word length for enloopy for next inner loop, based on maxampy 204 Run inner loop with determined word length I for enloopy and determined upshift for corrxy Update maxampy K-206 after addition of pulse in inner loop i -~~~ ~ ~ ~ ~ - Figure 2

公开(公告)号：HUE042095T2

公开(公告)日：2019-06-28

申请号：HUE16165702

申请日：2015-06-25

Applicant: ERICSSON TELEFON AB L M

Inventor： SVEDBERG JONAS

IPC: H03M7/30

公开(公告)号：CA2978416C

公开(公告)日：2019-06-18

申请号：CA2978416

申请日：2014-01-22

Applicant: ERICSSON TELEFON AB L M

Inventor： BRUHN STEFAN ,  SVEDBERG JONAS

IPC: G10L19/005 ,  G10L19/02

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.

公开(公告)号：PL3098811T3

公开(公告)日：2019-04-30

申请号：PL16179227

申请日：2013-11-12

Applicant: ERICSSON TELEFON AB L M

Inventor： NÄSLUND SEBASTIAN ,  GRANCHAROV VOLODYA ,  SVEDBERG JONAS

IPC: G10L19/005