公开(公告)号：EP4318471A2

公开(公告)日：2024-02-07

申请号：EP23217777.4

申请日：2015-02-09

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： Bäckström, Tom ,  Fischer Pedersen, Christian ,  Fischer, Johannes ,  Hüttenberger, Matthias ,  Pino, Alfonso

IPC分类号： G10L19/07

摘要： The invention provides an information encoder for encoding an information signal (IS), the information encoder (1) comprising:
an analyzer (2) for analyzing the information signal (IS) in order to obtain linear prediction coefficients of a predictive polynomial A(z);
a converter (3) for converting the linear prediction coefficients of the predictive polynomial A(z) to frequency values f 1 ...f n of a spectral frequency representation of the predictive polynomial A(z), wherein the converter (3) is configured to determine the frequency values f 1 ...f n by analyzing a pair of polynomials P(z) and Q(z) being defined as P z = A z + z − m − l A z − 1
and Q z = A z − z − m − l A z − 1 ,
wherein m is an order of the predictive polynomial A(z) and I is greater or equal to zero, wherein the converter (3) is configured to obtain the frequency values (f 1 ...f n ) by establishing a strictly real spectrum (RES) derived from P(z) and a strictly imaginary spectrum (IES) from Q(z) and by identifying zeros of the strictly real spectrum (RES) derived from P(z) and the strictly imaginary spectrum (IES) derived from Q(z);
a quantizer (4) for obtaining quantized frequency (f q1 ...f qn ) values from the frequency values (f 1 ...f n ); and
a bitstream producer (5) for producing a bitstream comprising the quantized frequency values (f q1 ...f qn ).

公开(公告)号：EP3629327A1

公开(公告)日：2020-04-01

申请号：EP19199807.9

申请日：2019-09-26

申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.

发明人： Fischer, Johannes ,  Bäckström, Tom

IPC分类号： G10L19/02

摘要： An apparatus for encoding an audio input signal to obtain an encoded audio signal is provided. The apparatus comprises a transformation module (110) configured to transform the audio input signal from an original domain to a transform domain to obtain a transformed audio signal. Moreover, the apparatus comprises an encoding module (120), configured to quantize the transformed audio signal to obtain a quantized signal, and configured to encode the quantized signal to obtain the encoded audio signal. The transformation module (110) is configured to transform the audio input signal depending on a plurality of predefined power values of quantization noise in the original domain.

公开(公告)号：EP4318471A3

公开(公告)日：2024-04-10

申请号：EP23217777.4

申请日：2015-02-09

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： Bäckström, Tom ,  Fischer Pedersen, Christian ,  Fischer, Johannes ,  Hüttenberger, Matthias ,  Pino, Alfonso

IPC分类号： G10L19/07

摘要： The invention provides an information encoder for encoding an information signal (IS), the information encoder (1) comprising:
an analyzer (2) for analyzing the information signal (IS) in order to obtain linear prediction coefficients of a predictive polynomial A(z);
a converter (3) for converting the linear prediction coefficients of the predictive polynomial A(z) to frequency values f 1 ...f n of a spectral frequency representation of the predictive polynomial A(z), wherein the converter (3) is configured to determine the frequency values f 1 ...f n by analyzing a pair of polynomials P(z) and Q(z) being defined as P z = A z + z − m − l A z − 1
and Q z = A z − z − m − l A z − 1 ,
wherein m is an order of the predictive polynomial A(z) and I is greater or equal to zero, wherein the converter (3) is configured to obtain the frequency values (f 1 ...f n ) by establishing a strictly real spectrum (RES) derived from P(z) and a strictly imaginary spectrum (IES) from Q(z) and by identifying zeros of the strictly real spectrum (RES) derived from P(z) and the strictly imaginary spectrum (IES) derived from Q(z);
a quantizer (4) for obtaining quantized frequency (f q1 ...f qn ) values from the frequency values (f 1 ...f n ); and
a bitstream producer (5) for producing a bitstream comprising the quantized frequency values (f q1 ...f qn ).

公开(公告)号：EP3239978A1

公开(公告)日：2017-11-01

申请号：EP17171964.4

申请日：2012-02-10

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： Bäckström, Tom ,  Fuchs, Guillaume

IPC分类号： G10L19/012 ,  G10L19/03 ,  G10L21/0216 ,  G10L25/78 ,  G10L19/22 ,  G10L19/02 ,  G10L19/025 ,  G10L19/107 ,  G10L19/04 ,  G10L19/26 ,  G10L25/06

CPC分类号： G10L19/00 ,  G10K11/16 ,  G10L19/005 ,  G10L19/012 ,  G10L19/0212 ,  G10L19/022 ,  G10L19/025 ,  G10L19/03 ,  G10L19/04 ,  G10L19/107 ,  G10L19/12 ,  G10L19/18 ,  G10L19/22 ,  G10L19/26 ,  G10L21/0216 ,  G10L25/06 ,  G10L25/78

摘要： An apparatus for decoding an encoded audio signal, wherein one or more tracks are associated with the encoded audio signal, each one of the tracks having a plurality of track positions and a plurality of pulses is provided. The apparatus comprises a pulse information decoder (110) and a signal decoder (120). The pulse information decoder (110) is adapted to decode a plurality of pulse positions, wherein each one of the pulse positions indicates one of the track positions of one of the tracks to indicate a position of one of the pulses of the track, and wherein the pulse information decoder is configured to decode the plurality of pulse positions by using a track positions number indicating a total number of the track positions of at least one of the tracks, a total pulses number indicating a total number of the pulses of at least one of the tracks, and one state number. The signal decoder (120) is adapted to decode the encoded audio signal by generating a synthesized audio signal using the plurality of pulse positions and a plurality of predictive filter coefficients being associated with the encoded audio signal.

摘要翻译： 一种用于解码编码音频信号的设备，其中一个或多个轨道与编码音频信号相关联，每个轨道具有多个轨道位置并提供多个脉冲。 该装置包括脉冲信息解码器（110）和信号解码器（120）。 脉冲信息解码器（110）适用于解码多个脉冲位置，其中每个脉冲位置指示轨迹之一的一个轨迹位置以指示轨迹的脉冲之一的位置，并且其中 脉冲信息解码器被配置为通过使用指示至少一个轨道的轨道位置的总数的轨道位置编号来解码多个脉冲位置，指示至少一个脉冲的总数的总脉冲数 的轨道，和一个国家号码。 信号解码器（120）适于通过使用多个脉冲位置和与编码音频信号相关联的多个预测滤波器系数来生成合成音频信号来解码经编码音频信号。

公开(公告)号：EP3239978B1

公开(公告)日：2018-12-26

申请号：EP17171964.4

申请日：2012-02-10

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： Bäckström, Tom ,  Fuchs, Guillaume

IPC分类号： G10L19/012 ,  G10L19/03 ,  G10L21/0216 ,  G10L25/78 ,  G10L19/22 ,  G10L19/02 ,  G10L19/025 ,  G10L19/107 ,  G10L19/04 ,  G10L19/26 ,  G10L25/06

CPC分类号： G10L19/00 ,  G10K11/16 ,  G10L19/005 ,  G10L19/012 ,  G10L19/0212 ,  G10L19/022 ,  G10L19/025 ,  G10L19/03 ,  G10L19/04 ,  G10L19/107 ,  G10L19/12 ,  G10L19/18 ,  G10L19/22 ,  G10L19/26 ,  G10L21/0216 ,  G10L25/06 ,  G10L25/78

摘要： An audio decoder comprises a background noise estimator that is configured to update a parametric background noise estimate during an active phase. It further comprises a background noise generator configured to synthesize an audio signal during an inactive phase.

公开(公告)号：EP3079151A1

公开(公告)日：2016-10-12

申请号：EP15163055.5

申请日：2015-04-09

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Friedrich-Alexander-Universität Erlangen-Nürnberg

发明人： Bäckström, Tom ,  Jokinen, Emma

IPC分类号： G10L19/08

CPC分类号： G10L19/08 ,  G10L19/032 ,  G10L21/0232 ,  G10L2019/0011

摘要： An audio encoder (100) for providing an encoded representation (102) on the basis of an audio signal (104), wherein the audio encoder (100) is configured to obtain a noise information (106) describing a noise included in the audio signal (104), and wherein the audio encoder (100) is configured to adaptively encode the audio signal (104) in dependence on the noise information (106), such that encoding accuracy is higher for parts of the audio signal (104) that are less affected by the noise included in the audio signal (104) than for parts of the audio signal (104) that are more affected by the noise included in the audio signal (104).

摘要翻译： 一种用于基于音频信号（104）提供编码表示（102）的音频编码器（100），其中所述音频编码器（100）被配置为获得描述音频信号中包括的噪声的噪声信息（106） （104），并且其中所述音频编码器（100）被配置为根据所述噪声信息（106）对所述音频信号（104）进行自适应编码，使得所述音频信号（104）的部分的编码精度较高 受音频信号（104）中包含的噪声的影响小于音频信号（104）中包含的噪声更多的音频信号（104）的部分。

公开(公告)号：EP3471092A1

公开(公告)日：2019-04-17

申请号：EP18209670.1

申请日：2012-02-10

申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.

发明人： Bäckström, Tom ,  Fuchs, Guillaume

IPC分类号： G10L19/012 ,  G10L19/03 ,  G10L21/0216 ,  G10L25/78 ,  G10L19/22 ,  G10L19/02 ,  G10L19/025 ,  G10L19/107 ,  G10L19/04 ,  G10L19/26 ,  G10L25/06

摘要： An apparatus for decoding an encoded audio signal, wherein one or more tracks are associated with the encoded audio signal, each one of the tracks having a plurality of track positions and a plurality of pulses is provided. The apparatus comprises a pulse information decoder (110) and a signal decoder (120). The pulse information decoder (110) is adapted to decode a plurality of pulse positions, wherein each one of the pulse positions indicates one of the track positions of one of the tracks to indicate a position of one of the pulses of the track, and wherein the pulse information decoder is configured to decode the plurality of pulse positions by using a track positions number indicating a total number of the track positions of at least one of the tracks, a total pulses number indicating a total number of the pulses of at least one of the tracks, and one state number. The signal decoder (120) is adapted to decode the encoded audio signal by generating a synthesized audio signal using the plurality of pulse positions and a plurality of predictive filter coefficients being associated with the encoded audio signal.

公开(公告)号：EP3444818A1

公开(公告)日：2019-02-20

申请号：EP18184592.6

申请日：2013-07-31

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： Bäckström, Tom ,  Multrus, Markus ,  Fuchs, Guillaume ,  Helmrich, Christian ,  Dietz, Martin

IPC分类号： G10L19/107 ,  G10L19/038 ,  G10L19/00

摘要： An apparatus for encoding a speech signal by determining a codebook vector of a speech coding algorithm is provided. The apparatus comprises a matrix determiner (110) for determining an autocorrelation matrix R , and a codebook vector determiner (120) for determining the codebook vector depending on the autocorrelation matrix R . The matrix determiner (110) is configured to determine the autocorrelation matrix R by determining vector coefficients of a vector r , wherein the autocorrelation matrix R comprises a plurality of rows and a plurality of columns, wherein the vector r indicates one of the columns or one of the rows of the autocorrelation matrix R , wherein R ( i, j ) = r (| i - j |), wherein R ( i, j ) indicates the coefficients of the autocorrelation matrix R , wherein i is a first index indicating one of a plurality of rows of the autocorrelation matrix R , and wherein j is a second index indicating one of the plurality of columns of the autocorrelation matrix R .

公开(公告)号：EP2916319A1

公开(公告)日：2015-09-09

申请号：EP14178789.5

申请日：2014-07-28

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Friedrich - Alexander - Universität Erlangen - Nuernberg

发明人： Bäckström, Tom ,  Fischer Pedersen, Christian ,  Fischer, Johannes ,  Hüttenberger, Matthias ,  Pino, Alfonso

IPC分类号： G10L19/07

CPC分类号： G10L19/07 ,  G10L19/0212 ,  G10L19/038 ,  G10L2019/0011 ,  G10L2019/0016

摘要： The invention provides an information encoder for encoding an information signal (IS), the information encoder (1) comprising:
an analyzer (2) for analyzing the information signal (IS) in order to obtain linear prediction coefficients of a predictive polynomial A(z);
a converter (3) for converting the linear prediction coefficients of the predictive polynomial A(z) to frequency values f 1 ...f n of a spectral frequency representation of the predictive polynomial A(z), wherein the converter (3) is configured to determine the frequency values f 1 ...f n by analyzing a pair of polynomials P(z) and Q(z) being defined as P z = A z + z - m - l ⁢ A ⁢ z - 1
and Q z = A z - z - m - l ⁢ A ⁢ z - 1 ,
wherein m is an order of the predictive polynomial A(z) and I is greater or
equal to zero, wherein the converter (3) is configured to obtain the frequency values (f 1 ...f n ) by establishing a strictly real spectrum (RES) derived from P(z) and a strictly imaginary spectrum (IES) from Q(z) and by identifying zeros of the strictly real spectrum (RES) derived from P(z) and the strictly imaginary spectrum (IES) derived from Q(z);
a quantizer (4) for obtaining quantized frequency (f q1 ...f qn ) values from the frequency values (f 1 ...f n ); and
a bitstream producer (5) for producing a bitstream comprising the quantized frequency values (f q1 ...f qn ).

摘要翻译： 本发明提供一种用于对信息信号（IS）进行编码的信息编码器，该信息编码器（1）包括：分析器（2），用于分析信息信号（IS），以获得预测多项式A（z）的线性预测系数 ）; 用于将预测多项式A（z）的线性预测系数转换为预测多项式A（z）的频谱频率表示的频率值f 1 ... fn的转换器（3），其中，转换器（3）被配置 通过分析一对多项式P（z）和Q（z）被定义为P z = A z + z-m-1 ¢A ¢z-1和Q（z），来确定频率值f 1 ... fn z = A z-z-m-1 ¢A ¢z-1，其中m是预测多项式A（z）的阶数，I大于或等于零，其中转换器（3）被配置为 通过建立从P（z）导出的严格实数谱（RES）和来自Q（z）的严格虚数谱（IES）并通过识别严格实数谱的零来获得频率值（f 1 ... fn） RES）和从Q（z）导出的严格虚数谱（IES）; 用于从频率值（f 1 ... f n）获得量化频率（f q1 ... f qn）值的量化器（4）; 以及用于产生包括量化频率值（f q1 ... f qn）的比特流的比特流产生器（5）。

公开(公告)号：EP2560161A1

公开(公告)日：2013-02-20

申请号：EP12156351.4

申请日：2012-02-21

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： Vilkamo, Juha ,  Bäckström, Tom ,  Küch, Fabian ,  Kuntz, Achim

IPC分类号： G10L19/00

CPC分类号： G10H1/183 ,  G10L19/008

摘要： An apparatus for generating an audio output signal having two or more audio output channels from an audio input signal having two or more audio input channels is provided. The apparatus comprises a provider (110) and a signal processor (120). The provider (110) is adapted to provide first covariance properties of the audio input signal. The signal processor (120) is adapted to generate the audio output signal by applying a mixing rule on at least two of the two or more audio input channels. The signal processor (120) is configured to determine the mixing rule based on the first covariance properties of the audio input signal and based on second covariance properties of the audio output signal, the second covariance properties being different from the first covariance properties.

摘要翻译： 提供了一种用于从具有两个或多个音频输入通道的音频输入信号产生具有两个或多个音频输出通道的音频输出信号的装置。 该装置包括提供商（110）和信号处理器（120）。 提供者（110）适于提供音频输入信号的第一协方差属性。 信号处理器（120）适于通过在两个或多个音频输入通道中的至少两个上施加混合规则来产生音频输出信号。 信号处理器（120）被配置为基于音频输入信号的第一协方差属性来确定混合规则，并且基于音频输出信号的第二协方差属性，第二协方差属性与第一协方差属性不同。