-
公开(公告)号:AU2013377885B2
公开(公告)日:2019-07-18
申请号:AU2013377885
申请日:2013-08-06
Applicant: QUALCOMM INC
Inventor: ATTI VENKATRAMAN SRINIVASA , KRISHNAN VENKATESH , RAJENDRAN VIVEK , VILLETTE STEPHANE PIERRE
IPC: G10L21/0208 , G10L19/07 , G10L19/24 , G10L21/0216 , G10L21/0388
Abstract: A particular method includes determining, based on spectral information corresponding to an audio signal that includes a low-band portion and a high-band portion, that the audio signal includes a component corresponding to an artifact-generating condition. The method also includes filtering the high-band portion of the audio signal and generating an encoded signal. Generating the encoded signal includes determining gain information based on a ratio of a first energy corresponding to filtered high-band output to a second energy corresponding to the low-band portion to reduce an audible effect of the artifact-generating condition.
-
公开(公告)号:ES2715476T3
公开(公告)日:2019-06-04
申请号:ES17150969
申请日:2013-08-29
Applicant: QUALCOMM INC
Inventor: ATTI VENKATRAMAN SRINIVASA , KRISHNAN VENKATESH
IPC: G10L21/038
Abstract: Un procedimiento (600) de control de ganancia para la codificación o la descodificación de audio, comprendiendo el procedimiento: determinar (602) un primer conjunto de valores de frecuencia espectral correspondiente a una porción de banda alta de una señal de audio, siendo el primer conjunto de valores de frecuencia espectral valores de frecuencia espectral de línea, LSF, o valores de coeficiente de predicción lineal, LPC; determinar (604), mediante la cuantificación del primer conjunto de valores de frecuencia espectral, un segundo conjunto de valores de frecuencia espectral que se aproxime al primer conjunto de valores de frecuencia espectral; estimar (608) una distorsión espectral correspondiente a la diferencia entre el primer conjunto de valores de frecuencia espectral y el segundo conjunto de valores de frecuencia espectral; determinar (610) un factor de ganancia de acuerdo con un mapeo de la distorsión espectral al factor de ganancia; y ajustar (612) una ganancia de trama correspondiente a al menos una porción de la señal de audio en base al factor de ganancia, en el que la ganancia de trama se determina en base a una señal de banda alta sintetizada y en base a la porción de banda alta de la señal de audio, sintetizándose la señal de banda alta sintetizada en base al primer o al segundo conjunto de valores de frecuencia espectral.
-
公开(公告)号:DK2954523T3
公开(公告)日:2019-03-25
申请号:DK13753450
申请日:2013-08-06
Applicant: QUALCOMM INC
Inventor: ATTI VENKATRAMAN SRINIVASA , KRISHNAN VENKATESH , RAJENDRAN VIVEK , VILLETTE STEPHANE PIERRE
IPC: G10L21/0208 , G10L19/07 , G10L19/24 , G10L21/0216 , G10L21/0388
-
公开(公告)号:AU2013377884B2
公开(公告)日:2018-08-02
申请号:AU2013377884
申请日:2013-08-06
Applicant: QUALCOMM INC
Inventor: ATTI VENKATRAMAN SRINIVASA , KRISHNAN VENKATESH
IPC: G10L21/0264 , G10L21/038
Abstract: A particular method includes determining, based on an inter-line spectral pair (LSP) spacing corresponding to an audio signal, that the audio signal includes a component corresponding to an artifact-generating condition. The method also includes, in response to determining that the audio signal includes the component, adjusting a gain parameter corresponding to the audio signal. For example, the gain parameter may be adjusted via gain attenuation and/or gain smoothing.
-
公开(公告)号:CA2896811C
公开(公告)日:2018-07-31
申请号:CA2896811
申请日:2013-08-06
Applicant: QUALCOMM INC
Inventor: ATTI VENKATRAMAN SRINIVASA , KRISHNAN VENKATESH
IPC: G10L21/0264 , G10L21/038
Abstract: A particular method includes determining, based on an inter-line spectral pair (LSP) spacing corresponding to an audio signal, that the audio signal includes a component corresponding to an artifact-generating condition. The method also includes, in response to determining that the audio signal includes the component, adjusting a gain parameter corresponding to the audio signal. For example, the gain parameter may be adjusted via gain attenuation and/or gain smoothing.
-
公开(公告)号:HUE031736T2
公开(公告)日:2017-07-28
申请号:HUE13753223
申请日:2013-08-06
Applicant: QUALCOMM INC
Inventor: ATTI VENKATRAMAN SRINIVASA , KRISHNAN VENKATESH
IPC: G10L19/03
-
公开(公告)号:ES2576232T3
公开(公告)日:2016-07-06
申请号:ES12810018
申请日:2012-12-21
Applicant: QUALCOMM INC
Inventor: ATTI VENKATRAMAN SRINIVASA , DUNI ETHAN ROBERT
Abstract: Un procedimiento, que comprende: recibir una porción de una señal de audio en un primer clasificador; clasificar la porción de la señal de audio en el primer clasificador como voz o como música; y procesar la porción de la señal de audio, en el que el procesamiento de la porción de la señal de audio comprende: si la porción se clasifica por el primer clasificador como voz, entonces codificar la voz usando un primer modo de codificación; o si la porción se clasifica por el primer clasificador como música, entonces: proporcionar la porción a un segundo clasificador; clasificar la porción en el segundo clasificador como voz o como música; y codificar la porción de la señal de audio, en el que codificar la porción de la señal de audio comprende: si la porción se clasifica en el segundo clasificador como voz, entonces codificar la porción usando un segundo modo de codificación; o si la porción se clasifica en el segundo clasificador como música, entonces codificar la porción usando un tercer modo de codificación.
-
公开(公告)号:AU2013377891A1
公开(公告)日:2015-07-23
申请号:AU2013377891
申请日:2013-08-29
Applicant: QUALCOMM INC
Inventor: ATTI VENKATRAMAN SRINIVASA , KRISHNAN VENKATESH
IPC: G10L21/038
Abstract: A method includes receiving a first value of a mixing factor. The first value corresponds to a first portion of an audio signal received at an audio encoder. The method includes receiving a second value of the mixing factor. The second value corresponds to a second portion of the audio signal. The method also includes generating a third value of the mixing factor at least partially based on the first value and the second value and mixing an excitation signal with modulated noise based on the third value. Another method includes determining a first set of spectral frequency values corresponding to an audio signal and determining a second set of spectral frequency values that approximates the first set of spectral frequency values. A gain value corresponding to at least a portion of the audio signal is adjusted based on a difference between the first set and the second set.
-
公开(公告)号:AU2013377885A1
公开(公告)日:2015-07-23
申请号:AU2013377885
申请日:2013-08-06
Applicant: QUALCOMM INC
Inventor: ATTI VENKATRAMAN SRINIVASA , KRISHNAN VENKATESH , RAJENDRAN VIVEK , VILLETTE STEPHANE PIERRE
IPC: G10L21/0208 , G10L19/07 , G10L19/24 , G10L21/0216 , G10L21/0388
Abstract: A particular method includes determining, based on spectral information corresponding to an audio signal that includes a low-band portion and a high-band portion, that the audio signal includes a component corresponding to an artifact-generating condition. The method also includes filtering the high-band portion of the audio signal and generating an encoded signal. Generating the encoded signal includes determining gain information based on a ratio of a first energy corresponding to filtered high-band output to a second energy corresponding to the low-band portion to reduce an audible effect of the artifact-generating condition.
-
公开(公告)号:IN1588MUN2014A
公开(公告)日:2015-05-08
申请号:IN1588MUN2014
申请日:2014-08-06
Applicant: QUALCOMM INC
Inventor: ATTI VENKATRAMAN SRINIVASA , DUNI ETHAN ROBERT
IPC: G10L19/20
Abstract: Improved audio classification is provided for encoding applications. An initial classification is performed followed by a finer classification to produce speech classifications and music classifications with higher accuracy and less complexity than previously available. Audio is classified as speech or music on a frame by frame basis. If the frame is classified as music by the initial classification that frame undergoes a second finer classification to confirm that the frame is music and not speech (e.g. speech that is tonal and/or structured that may not have been classified as speech by the initial classification). Depending on the implementation one or more parameters may be used in the finer classification. Example parameters include voicing modified correlation signal activity and long term pitch gain.
-
-
-
-
-
-
-
-
-