Audio Signal Modification
    21.
    发明申请
    Audio Signal Modification 审中-公开
    音频信号修改

    公开(公告)号:US20080215330A1

    公开(公告)日:2008-09-04

    申请号:US11996364

    申请日:2006-07-18

    IPC分类号: G10L13/00

    摘要: A method of modifying an audio signal comprises the steps of analyzing the input audio signal (x) so as to produce a set of filter parameters (p) and a residual signal (r), modifying the set of filter parameters (p) so as to produce a modified set of filter parameters (p′), and synthesizing an output audio signal (y) using the modified set of filter parameters (p′) and the residual signal (r). The set of filter parameters (p) comprises poles (λA) and coefficients (a; c). The step of modifying the filter parameters (p) involves interpolating lattice filter reflection coefficients (c) so as to scale the spectral envelope of the audio signal.

    摘要翻译: 修改音频信号的方法包括分析输入音频信号(x)以产生一组滤波器参数(p)和残差信号(r)的步骤,修改滤波器参数集合(p),以便 以产生经修改的滤波器参数集合(p'),并且使用修改的滤波器参数(p')和残余信号(r)来合成输出音频信号(y)。 滤波器参数(p)的集合包括极(λΛA)和系数(a; c)。 修改滤波器参数(p)的步骤涉及内插滤波器反射系数(c),以便缩放音频信号的频谱包络。

    Parametric encoding and decoding
    22.
    发明授权
    Parametric encoding and decoding 有权
    参数编码和解码

    公开(公告)号:US09070358B2

    公开(公告)日:2015-06-30

    申请号:US13505758

    申请日:2010-11-05

    IPC分类号: H04R5/00 G10L19/008

    CPC分类号: G10L19/008

    摘要: An encoder for a multi-channel audio signal which comprises a down-mixer (201, 203, 205) for generating a down-mix as a combination of at least a first and second channel signal weighted by respectively a first and second weight with different amplitudes for at least some time-frequency intervals. Furthermore, a circuit (201, 203, 209) generates up-mix parametric data characterizing a relationship between the channel signals as well as characterizing the weights. A circuit generates weight estimates for the encoder weights from the up-mix parametric data; and comprises an up-mixer (407) which recreates the multi channel audio signal by up-mixing the down-mix in response to the up-mix parametric data, the first weight estimate and the second weight estimate. The up-mixing is dependent on the amplitude of at least one of the weight estimate(s).

    摘要翻译: 一种用于多声道音频信号的编码器,包括用于产生下混合器的下混频器(201,203,205),所述下混频器作为至少第一和第二声道信号的组合,分别由不同的第一和第二加权器加权 至少一些时间间隔的振幅。 此外,电路(201,203,209)产生表征信道信号之间的关系以及表征权重的混合参数数据。 电路从混合参数数据生成编码器权重的权重估计; 并且包括上混频器(407),其通过响应于混合参数数据,第一权重估计和第二权重估计,通过向下混合来重新创建多声道音频信号。 上混合取决于至少一个重量估计的振幅。

    Multi-channel audio coding
    23.
    发明授权
    Multi-channel audio coding 有权
    多声道音频编码

    公开(公告)号:US08346564B2

    公开(公告)日:2013-01-01

    申请号:US11909730

    申请日:2006-03-16

    IPC分类号: G10L19/00 G10L21/04

    摘要: A multi-channel audio encoder (10) for encoding a multi-channel audio signal (101), e.g. a 5.1 channel audio signal, into a spatial down-mix (102), e.g. a stereo signal, and associated parameters (104, 105). The encoder (10) comprises first and second units (110, 120). The first unit (110) encodes the multi-channel audio signal (101) into the spatial down-mix (102) and parameters (104). These parameters (104) enable a multi-channel decoder (20) to reconstruct the multi-channel audio signal (203) from the spatial down-mix (102). The second unit (120) generates, from the spatial down-mix (102), parameters (105) that enable the decoder to reconstruct the spatial down-mix (202) from an alternative down-mix (103), e.g. a so-called artistic down-mix that has been manually mixed in a sound studio. In this way, the decoder (20) can efficiently deal with a situation in which an alternative down-mix (103) is received instead of the regular spatial, down-mix (102). In the decoder (20), first the spatial down-mix (202) is reconstructed from the alternative down-mix (103) and the parameters (105). Next, the spatial down-mix (202) is decoded into the multi-channel audio signal (203).

    摘要翻译: 一种用于对多声道音频信号(101)进行编码的多声道音频编码器(10)。 5.1声道音频信号转换成空间缩混(102)。 立体声信号和相关参数(104,105)。 编码器(10)包括第一和第二单元(110,120)。 第一单元(110)将多声道音频信号(101)编码成空间缩混(102)和参数(104)。 这些参数(104)使得多声道解码器(20)能够从空间缩混(102)重建多声道音频信号(203)。 第二单元(120)从空间缩混(102)生成参数(105),使参数(105)能够使解码器从替代的下混合(103)重构空间缩混(202)。 所谓的艺术混合,已经在一个健全的工作室手工混合。 以这种方式,解码器(20)可以有效地处理接收替代的下混合(103)而不是常规的空间,混合(102)的情况。 在解码器(20)中,首先,从替代的下混合(103)和参数(105)重构空间缩混(202)。 接下来,空间缩混(202)被解码为多声道音频信号(203)。

    PARAMETRIC ENCODING AND DECODING
    24.
    发明申请
    PARAMETRIC ENCODING AND DECODING 有权
    参数编码和解码

    公开(公告)号:US20120224702A1

    公开(公告)日:2012-09-06

    申请号:US13505758

    申请日:2010-11-05

    IPC分类号: H04R5/00

    CPC分类号: G10L19/008

    摘要: An encoder for a multi-channel audio signal which comprises a down-mixer (201, 203, 205) for generating a down-mix as a combination of at least a first and second channel signal weighted by respectively a first and second weight with different amplitudes for at least some time-frequency intervals. Furthermore, a circuit (201, 203, 209) generates up-mix parametric data characterizing a relationship between the channel signals as well as characterizing the weights. A circuit generates weight estimates for the encoder weights from the up-mix parametric data; and comprises an up-mixer (407) which recreates the multi channel audio signal by up-mixing the down-mix in response to the up-mix parametric data, the first weight estimate and the second weight estimate. The up-mixing is dependent on the amplitude of at least one of the weight estimate(s).

    摘要翻译: 一种用于多声道音频信号的编码器,包括用于产生下混合器的下混频器(201,203,205),所述下混频器作为至少第一和第二声道信号的组合,分别由具有不同 至少一些时间间隔的振幅。 此外,电路(201,203,209)产生表征信道信号之间的关系以及表征权重的混合参数数据。 电路从混合参数数据生成编码器权重的权重估计; 并且包括上混频器(407),其通过响应于混合参数数据,第一权重估计和第二权重估计,通过向下混合来重新创建多声道音频信号。 上混合取决于至少一个重量估计的幅度。

    MULTI-CHANNEL AUDIO CODING
    25.
    发明申请
    MULTI-CHANNEL AUDIO CODING 有权
    多声道音频编码

    公开(公告)号:US20100153097A1

    公开(公告)日:2010-06-17

    申请号:US11909730

    申请日:2006-03-16

    IPC分类号: G10L19/00

    摘要: A multi-channel audio encoder (10) for encoding a multi-channel audio signal (101), e.g. a 5.1 channel audio signal, into a spatial down-mix (102), e.g. a stereo signal, and associated parameters (104, 105). The encoder (10) comprises first and second units (110, 120). The first unit (110) encodes the multi-channel audio signal (101) into the spatial down-mix (102) and parameters (104). These parameters (104) enable a multi-channel decoder (20) to reconstruct the multi-channel audio signal (203) from the spatial down-mix (102). The second unit (120) generates, from the spatial down-mix (102), parameters (105) that enable the decoder to reconstruct the spatial down-mix (202) from an alternative down-mix (103), e.g. a so-called artistic down-mix that has been manually mixed in a sound studio. In this way, the decoder (20) can efficiently deal with a situation in which an alternative down-mix (103) is received instead of the regular spatial, down-mix (102). In the decoder (20), first the spatial down-mix (202) is reconstructed from the alternative down-mix (103) and the parameters (105). Next, the spatial down-mix (202) is decoded into the multi-channel audio signal (203).

    摘要翻译: 一种用于对多声道音频信号(101)进行编码的多声道音频编码器(10)。 5.1声道音频信号转换成空间缩混(102)。 立体声信号和相关参数(104,105)。 编码器(10)包括第一和第二单元(110,120)。 第一单元(110)将多声道音频信号(101)编码成空间缩混(102)和参数(104)。 这些参数(104)使得多声道解码器(20)能够从空间缩混(102)重建多声道音频信号(203)。 第二单元(120)从空间缩混(102)生成参数(105),使参数(105)能够使解码器从替代的下混合(103)重构空间缩混(202)。 所谓的艺术混合,已经在一个健全的工作室手工混合。 以这种方式,解码器(20)可以有效地处理接收替代的下混合(103)而不是常规的空间,混合(102)的情况。 在解码器(20)中,首先,从替代的下混合(103)和参数(105)重构空间缩混(202)。 接下来,空间缩混(202)被解码为多声道音频信号(203)。

    Parametric coding of an audio or speech signal

    公开(公告)号:US07050970B2

    公开(公告)日:2006-05-23

    申请号:US10046472

    申请日:2002-01-14

    IPC分类号: G10L19/04 G10L19/00

    CPC分类号: G10L19/0204

    摘要: An encoder includes a segmentation unit for segmenting an audio or speech signal into at least one segment and a calculation unit for calculating sinusoidal code data in the form of frequency and amplitude data of a given extension from the segment such that the extension approximates the segment for a given criterion. The calculation of the sinusoidal code data θki, dji and eji for the segment x(n) is carried out according to the following extension {circumflex over (x)}: x ⋒ = ∑ i = 1 L ⁢ ⁢ ∑ j = 0 J - 1 ⁢ ⁢ [ d j i ⁢ f j ⁡ ( n ) ⁢ cos ⁡ ( Θ i ⁡ ( n ) ) + e j i ⁢ f j ⁡ ( n ) ⁢ sin ( Θ i ⁡ ( n ) ] . Fig . ⁢ 1.

    METHOD SILHOUETTE IMAGE REPRESENTATION
    27.
    发明申请
    METHOD SILHOUETTE IMAGE REPRESENTATION 有权
    方法SILHOUETTE图像表示

    公开(公告)号:US20110238757A1

    公开(公告)日:2011-09-29

    申请号:US13133005

    申请日:2009-12-04

    IPC分类号: G06F15/16 G09G5/00

    摘要: This invention relates to a method and a system of silhouette image representation of a subject located at a remote location. Input data relating to the remote location are received, one or more graphical indicator indicating graphically at least one local condition at the remote location is obtained based on the received input data and the one or more graphical indicators are incorporated in the silhouette image.

    摘要翻译: 本发明涉及位于远程位置的被摄体的轮廓图像表示的方法和系统。 接收到与远程位置相关的输入数据,基于所接收的输入数据获得一个或多个图形指示符,以图形方式指示远程位置处的至少一个本地条件,并且一个或多个图形指示符被并入轮廓图像中。

    PREDICTIVE ENCODING OF A MULTI CHANNEL SIGNAL
    28.
    发明申请
    PREDICTIVE ENCODING OF A MULTI CHANNEL SIGNAL 审中-公开
    多通道信号的预测编码

    公开(公告)号:US20090281798A1

    公开(公告)日:2009-11-12

    申请号:US11915004

    申请日:2006-05-09

    IPC分类号: G10L19/04

    CPC分类号: G10L19/008 G10L19/06

    摘要: A multi channel encoder (100) comprises a multi channel linear predictive analyzer (105) for linear predictive coding of a multi channel signal. A prediction controller (101) comprises a prediction parameter generator (301) which generates linear prediction coding parameter matrices for the multi channel signal which are then mapped to reflection matrices. The reflection matrices may specifically be normalized backward or forward reflection matrices. The reflection matrices are encoded by a reflection parameter encoder (305) and combined with other encoded data in a multiplexer (109) to generate encoded data for the multi channel signal. The reflection parameter encoder (305) may specifically decompose the reflection matrices using an Eigenvalue decomposition or a singular value decomposition and the resulting data may be quantized for transmission. A decoder (200) receives the encoded data and obtains the prediction parameters by performing the inverse operation.

    摘要翻译: 多通道编码器(100)包括用于多通道信号的线性预测编码的多通道线性预测分析器(105)。 预测控制器(101)包括预测参数生成器(301),该预测参数生成器生成多信道信号的线性预测编码参数矩阵,然后映射到反射矩阵。 反射矩阵可以具体地是归一化的反向或正向反射矩阵。 反射矩阵由反射参数编码器(305)编码并与多路复用器(109)中的其它编码数据组合以产生用于多通道信号的编码数据。 反射参数编码器(305)可以使用特征值分解或奇异值分解来具体地分解反射矩阵,并且可以量化所得到的数据以进行传输。 解码器(200)接收编码数据并通过执行逆运算来获得预测参数。

    Quality of decoded audio by adding noise
    29.
    发明授权
    Quality of decoded audio by adding noise 失效
    通过增加噪声对解码音频的质量

    公开(公告)号:US07548852B2

    公开(公告)日:2009-06-16

    申请号:US10562359

    申请日:2004-06-25

    IPC分类号: G10L19/00

    CPC分类号: G10L21/038

    摘要: The present invention relates to a method of encoding and decoding an audio signal. The invention further relates to an arrangement for encoding and decoding an audio signal. The invention further relates to a computer-readable medium comprising a data record indicative of an audio signal and a device for communicating an audio signal having been encoded according to the present invention. By the method of encoding, a double description of the signal is obtained, where the encoding comprises two encoding steps, a first standard encoding and an additional second encoding. The second encoding is able to give a coarse description of the signal, such that a stochastic realization can be made and appropriate parts can be added to the decoded signal from the first decoding. The required description of the second encoder in order to make the realization of a stochastic signal possible requires a relatively low bit rate, while other double/multiple descriptions require a much higher bit rate.

    摘要翻译: 本发明涉及一种对音频信号进行编码和解码的方法。 本发明还涉及用于对音频信号进行编码和解码的装置。 本发明还涉及包括指示音频信号的数据记录的计算机可读介质和用于传送根据本发明已被编码的音频信号的设备。 通过编码的方法,获得对信号的双重描述,其中编码包括两个编码步骤,第一标准编码和附加的第二编码。 第二编码能够给出信号的粗略描述,使得可以进行随机实现,并且可以从第一解码将合适的部分添加到解码信号。 为了实现随机信号,第二编码器的所需描述可能需要相对低的比特率,而其他双重/多重描述需要高得多的比特率。