AR096667A1 - AUDIO DECODER THAT HAS A BANDWIDTH EXTENSION MODULE WITH AN ENERGY ADJUSTMENT MODULE - Google Patents
AUDIO DECODER THAT HAS A BANDWIDTH EXTENSION MODULE WITH AN ENERGY ADJUSTMENT MODULEInfo
- Publication number
- AR096667A1 AR096667A1 ARP140102331A ARP140102331A AR096667A1 AR 096667 A1 AR096667 A1 AR 096667A1 AR P140102331 A ARP140102331 A AR P140102331A AR P140102331 A ARP140102331 A AR P140102331A AR 096667 A1 AR096667 A1 AR 096667A1
- Authority
- AR
- Argentina
- Prior art keywords
- audio
- signal
- audio signal
- bandwidth extension
- current
- Prior art date
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Abstract
Se provee un decodificador de audio configurado para producir una señal de audio a partir de una corriente de bits que contiene marcos de audio, comprendiendo el decodificador de audio: un módulo decodificador de banda de núcleo configurado para derivar una señal de audio de banda de núcleo directamente decodificado a partir de la corriente de bits; un módulo de extensión de ancho de banda configurado para derivar una señal de audio de extensión de ancho de banda paramétricamente decodificada a partir de la señal de audio de banda de núcleo y a partir de la corriente de bits, en donde la señal de audio de extensión de ancho de banda está basada en una señal en el dominio de las frecuencias que tiene por lo menos una banda de frecuencia; y un combinador configurado para combinar la señal de audio de banda de núcleo y la señal de audio de extensión de ancho de banda de manera de producir la señal de audio; en donde el módulo de extensión de ancho de banda comprende un módulo de ajuste de energía que está configurado de una manera tal que en un marco de audio actual en la que tiene lugar una pérdida de marco de audio, se establece una energía de señal ajustada para el marco de audio actual para la por lo menos una banda de frecuencia; sobre la base de un factor de ganancia actual para el marco de audio actual, en donde el factor de ganancia actual se deriva a partir de un factor de ganancia de un marco de audio previo o a partir de la corriente de bits, y sobre la base de una energía estimada para la señal para la por lo menos una banda de frecuencia, en donde la energía estimada para la señal se deriva a partir de un espectro del marco de audio actual de la señal de audio de banda de núcleo.An audio decoder configured to produce an audio signal from a bit stream containing audio frames is provided, the audio decoder comprising: a core band decoder module configured to derive a core band audio signal. directly decoded from the bit stream; a bandwidth extension module configured to derive a parametrically decoded bandwidth extension audio signal from the core band audio signal and from the bit stream, where the extension audio signal bandwidth is based on a signal in the frequency domain that has at least one frequency band; and a combiner configured to combine the core band audio signal and the bandwidth extension audio signal so as to produce the audio signal; wherein the bandwidth extension module comprises an energy adjustment module that is configured in such a way that in a current audio frame in which an audio frame loss occurs, an adjusted signal energy is established for the current audio frame for the at least one frequency band; on the basis of a current gain factor for the current audio frame, where the current gain factor is derived from a gain factor of a previous audio frame or from the bit stream, and on the basis of an estimated energy for the signal for the at least one frequency band, wherein the estimated energy for the signal is derived from a spectrum of the current audio frame of the core band audio signal.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13173152 | 2013-06-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
AR096667A1 true AR096667A1 (en) | 2016-01-27 |
Family
ID=48692286
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ARP140102331A AR096667A1 (en) | 2013-06-21 | 2014-06-19 | AUDIO DECODER THAT HAS A BANDWIDTH EXTENSION MODULE WITH AN ENERGY ADJUSTMENT MODULE |
Country Status (1)
Country | Link |
---|---|
AR (1) | AR096667A1 (en) |
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2014
- 2014-06-19 AR ARP140102331A patent/AR096667A1/en active IP Right Grant
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