公开(公告)号：US20060083385A1

公开(公告)日：2006-04-20

申请号：US11006482

申请日：2004-12-07

Applicant: Eric Allamanche ,  Sascha Disch ,  Christof Faller ,  Juergen Herre

Inventor： Eric Allamanche ,  Sascha Disch ,  Christof Faller ,  Juergen Herre

IPC: H04R5/00

CPC classification number: G10L19/008

Abstract: At an audio encoder, cue codes are generated for one or more audio channels, wherein an envelope cue code is generated by characterizing a temporal envelope in an audio channel. At an audio decoder, E transmitted audio channel(s) are decoded to generate C playback audio channels, where C>E≧1. Received cue codes include an envelope cue code corresponding to a characterized temporal envelope of an audio channel corresponding to the transmitted channel(s). One or more transmitted channel(s) are upmixed to generate one or more upmixed channels. One or more playback channels are synthesized by applying the cue codes to the one or more upmixed channels, wherein the envelope cue code is applied to an upmixed channel or a synthesized signal to adjust a temporal envelope of the synthesized signal based on the characterized temporal envelope such that the adjusted temporal envelope substantially matches the characterized temporal envelope.

Abstract translation: 在音频编码器中，为一个或多个音频通道生成提示码，其中通过表征音频通道中的时间包络来产生包络线索码。 在音频解码器处，E个发送的音频信道被解码以产生C个播放音频信道，其中C> E> = 1。 接收的提示码包括与对应于所发送的频道的音频信道的特征化时间包络对应的信封提示码。 一个或多个传输的信道被混合以产生一个或多个上混频道。 通过将提示码应用于一个或多个上混合通道来合成一个或多个回放通道，其中，将包络提示码应用于上混合通道或合成信号，以基于表征的时间包络线来调整合成信号的时间包络 使得调整的时间包络基本上与所表征的时间包络相匹配。

公开(公告)号：US07006636B2

公开(公告)日：2006-02-28

申请号：US10155437

申请日：2002-05-24

Applicant: Frank Baumgarte ,  Christof Faller

Inventor： Frank Baumgarte ,  Christof Faller

IPC: H04R5/00 ,  G06F17/00 ,  G10L19/00

CPC classification number: H04S3/002 ,  G10L19/008 ,  G10L19/0204 ,  H04S3/004 ,  H04S5/00 ,  H04S2420/03

Abstract: An auditory scene is synthesized from a mono audio signal by modifying, for each critical band, an auditory scene parameter (e.g., an inter-aural level difference (ILD) and/or an inter-aural time difference (ITD)) for each sub-band within the critical band, where the modification is based on an average estimated coherence for the critical band. The coherence-based modification produces auditory scenes having objects whose widths more accurately match the widths of the objects in the original input auditory scene.

公开(公告)号：US20060009225A1

公开(公告)日：2006-01-12

申请号：US10935061

申请日：2004-09-07

Applicant: Jurgen Herre ,  Christof Faller ,  Sascha Disch ,  Johannes Hilpert

Inventor： Jurgen Herre ,  Christof Faller ,  Sascha Disch ,  Johannes Hilpert

IPC: H04Q7/20

CPC classification number: G10L19/008 ,  H04S3/00 ,  H04S2420/03

Abstract: An apparatus for generating a multi-channel output signal performs a center channel cancellation to obtain improved base channels for reconstructing left-side output channels or right-side output channels. In particular, the apparatus includes a cancellation channel calculator for calculating a cancellation channel using information related to the original center channel available at the decoder. The device furthermore includes a combiner for combining a transmission channel with the cancellation channel. Finally, the apparatus includes a reconstructor for generating the multi-channel output signal. Due to the center channel cancellation, the channel reconstructor not only uses a different base channel for reconstructing the center channel but also uses base channels different from the transmission channels for reconstructing left and right output channels which have a reduced or even completely cancelled influence of the original center channel.

Abstract translation: 用于产生多通道输出信号的装置执行中心信道消除以获得用于重建左侧输出信道或右侧输出信道的改进的基本信道。 具体地，该装置包括消除信道计算器，用于使用与解码器可用的原始中心信道相关的信息来计算消除信道。 该装置还包括用于将传输信道与消除信道组合的组合器。 最后，该装置包括用于产生多声道输出信号的重建器。 由于中心信道消除，信道重构器不仅使用不同的基本信道来重构中心信道，而且还使用与传输信道不同的基本信道来重构左右输出信道，这些信道具有减少甚至完全消除的影响 原中心频道。

公开(公告)号：US20050180579A1

公开(公告)日：2005-08-18

申请号：US10815591

申请日：2004-04-01

Applicant: Frank Baumgarte ,  Christof Faller

Inventor： Frank Baumgarte ,  Christof Faller

IPC: H04S5/02 ,  H04S3/00 ,  H04S3/02 ,  H04S5/00 ,  H04S7/00 ,  H03G3/00

CPC classification number: H04S3/002 ,  G10L19/008 ,  H04S3/004 ,  H04S7/305 ,  H04S2420/03

Abstract: A scheme for stereo and multi-channel synthesis of inter-channel correlation (ICC) (normalized cross-correlation) cues for parametric stereo and multi-channel coding. The scheme synthesizes ICC cues such that they approximate those of the original. For that purpose, diffuse audio channels are generated and mixed with the transmitted combined (e.g., sum) signal(s). The diffuse audio channels are preferably generated using relatively long filters with exponentially decaying Gaussian impulse responses. Such impulse responses generate diffuse sound similar to late reverberation. An alternative implementation for reduced computational complexity is proposed, where inter-channel level difference (ICLD), inter-channel time difference (ICTD), and ICC synthesis are all carried out in the domain of a single short-time Fourier transform (STFT), including the filtering for diffuse sound generation.

Abstract translation: 用于参数立体声和多声道编码的信道间相关（ICC）（归一化互相关）提示的立体声和多声道合成的方案。 该方案合成了ICC提示，使它们与原始图像近似。 为此，生成扩散音频通道并与发送的组合（例如，和）信号混合。 优选地，使用具有指数衰减高斯脉冲响应的相对长的滤波器生成扩散音频信道。 这种脉冲响应产生类似于后期混响的漫射声。 提出了一种用于降低计算复杂度的替代实现方式，其中，在单个短时傅立叶变换（STFT）的领域中，都进行信道间电平差（ICLD），信道间时间差（ICTD）和ICC合成， ，包括扩散声产生的滤波。

公开(公告)号：US09521502B2

公开(公告)日：2016-12-13

申请号：US14764754

申请日：2013-01-04

Applicant: Christof Faller ,  David Virette ,  Yue Lang

Inventor： Christof Faller ,  David Virette ,  Yue Lang

IPC: H04S7/00 ,  H04R5/027 ,  H04R5/04 ,  H04S1/00 ,  H04R1/40 ,  H04R3/00

CPC classification number: H04S7/301 ,  H04R1/406 ,  H04R3/005 ,  H04R5/027 ,  H04R5/04 ,  H04S1/002 ,  H04S2400/09 ,  H04S2400/15

Abstract: A method for determining an output stereo signal comprising determining a first differential signal and determining a second differential signal; determining a first power spectrum based on the first differential signal and determining a second power spectrum based on the second differential signal; determining a first weighting function and a second weighting function as a function of the first power spectrum and the second power spectrum; and filtering a first signal, which represents a first combination of the first input audio channel signal and the second input audio channel signal, and filtering a second signal, which represents a second combination of the first input audio channel signal and the second input audio channel signal.

Abstract translation: 一种用于确定输出立体声信号的方法，包括确定第一差分信号并确定第二差分信号; 基于所述第一差分信号确定第一功率谱，并基于所述第二差分信号确定第二功率谱; 确定作为所述第一功率谱和所述第二功率谱的函数的第一加权函数和第二加权函数; 以及对表示所述第一输入音频声道信号和所述第二输入音频声道信号的第一组合的第一信号进行滤波，以及对表示所述第一输入音频声道信号和所述第二输入音频声道信号的第二组合的第二信号进行滤波 信号。

公开(公告)号：US20160234621A1

公开(公告)日：2016-08-11

申请号：US14764754

申请日：2013-01-04

Applicant: Christof Faller ,  David Virette ,  Yue Lang

Inventor： Christof Faller ,  David Virette ,  Yue Lang

IPC: H04S7/00 ,  H04R3/00 ,  H04R5/027

CPC classification number: H04S7/301 ,  H04R1/406 ,  H04R3/005 ,  H04R5/027 ,  H04R5/04 ,  H04S1/002 ,  H04S2400/09 ,  H04S2400/15

Abstract: A method for determining an output stereo signal comprising determining a first differential signal and determining a second differential signal; determining a first power spectrum based on the first differential signal and determining a second power spectrum based on the second differential signal; determining a first weighting function and a second weighting function as a function of the first power spectrum and the second power spectrum; and filtering a first signal, which represents a first combination of the first input audio channel signal and the second input audio channel signal, and filtering a second signal, which represents a second combination of the first input audio channel signal and the second input audio channel signal.

Abstract translation: 一种用于确定输出立体声信号的方法，包括确定第一差分信号并确定第二差分信号; 基于所述第一差分信号确定第一功率谱，并基于所述第二差分信号确定第二功率谱; 确定作为所述第一功率谱和所述第二功率谱的函数的第一加权函数和第二加权函数; 以及对表示所述第一输入音频声道信号和所述第二输入音频声道信号的第一组合的第一信号进行滤波，以及对表示所述第一输入音频声道信号和所述第二输入音频声道信号的第二组合的第二信号进行滤波 信号。

公开(公告)号：US09357305B2

公开(公告)日：2016-05-31

申请号：US13592977

申请日：2012-08-23

Applicant: Fabian Kuech ,  Juergen Herre ,  Christof Faller ,  Christophe Tournery

Inventor： Fabian Kuech ,  Juergen Herre ,  Christof Faller ,  Christophe Tournery

IPC: H04R5/00 ,  G10L19/008 ,  G10L19/26 ,  G10L21/02

CPC classification number: H04R5/00 ,  G10L19/008 ,  G10L19/265 ,  G10L21/02

Abstract: An apparatus for generating an enhanced downmix signal on the basis of a multi-channel microphone signal has a spatial analyzer configured to compute a set of spatial cue parameters having a direction information describing a direction-of-arrival of a direct sound, a direct sound power information and a diffuse sound power information on the basis of the multi-channel microphone signal. The apparatus also has a filter calculator for calculating enhancement filter parameters in dependence on the direction information describing the direction-of-arrival of the direct sound, in dependence on the direct sound power information and in dependence on the diffuse sound power information. The apparatus also has a filter for filtering the microphone signal, or a signal derived therefrom, using the enhancement filter parameters, to obtain the enhanced downmix signal.

Abstract translation: 一种用于基于多通道麦克风信号产生增强的下混合信号的装置具有空间分析器，该空间分析器被配置为计算具有描述直接声音到达方向的方向信息的一组空间提示参数，直接声音 功率信息和基于多声道麦克风信号的漫射声功率信息。 该装置还具有滤波器计算器，用于根据直接声功率信息和依赖于扩散声功率信息，根据描述直接声音到达方向的方向信息来计算增强滤波器参数。 该装置还具有用于使用增强滤波器参数对麦克风信号进行滤波的滤波器或从其导出的信号，以获得增强的降混信号。

公开(公告)号：US08731207B2

公开(公告)日：2014-05-20

申请号：US12864240

申请日：2009-01-12

Applicant: Fabian Kuech ,  Markus Kallinger ,  Christof Faller ,  Alexis Favrot

Inventor： Fabian Kuech ,  Markus Kallinger ,  Christof Faller ,  Alexis Favrot

IPC: H04B3/20 ,  H03G3/00

CPC classification number: H04M9/082

Abstract: An embodiment of an apparatus for computing control information for a suppression filter for filtering a second audio signal to suppress an echo based on a first audio signal includes a computer having a value determiner for determining at least one energy-related value for a band-pass signal of at least two temporally successive data blocks of at least one signal of a group of signals. The computer further includes a mean value determiner for determining at least one mean value of the at least one determined energy-related value for the band-pass signal. The computer further includes a modifier for modifying the at least one energy-related value for the band-pass signal on the basis of the determined mean value for the band-pass signal. The computer further includes a control information computer for computing the control information for the suppression filter on the basis of the at least one modified energy-related value.

Abstract translation: 用于计算用于滤波第二音频信号以抑制基于第一音频信号的回波的抑制滤波器的控制信息的装置的实施例包括具有用于确定带通的至少一个能量相关值的值确定器的计算机 一组信号的至少一个信号的至少两个时间上连续的数据块的信号。 该计算机还包括一个平均值确定器，用于确定该带通信号的至少一个确定的能量相关值的至少一个平均值。 该计算机还包括修改器，用于基于确定的带通信号的平均值修改带通信号的至少一个能量相关值。 计算机还包括控制信息计算机，用于基于至少一个修改的能量相关值来计算抑制滤波器的控制信息。

公开(公告)号：US08724763B2

公开(公告)日：2014-05-13

申请号：US12262239

申请日：2008-10-31

Applicant: Christof Faller ,  Raziel Haimi-Cohen

Inventor： Christof Faller ,  Raziel Haimi-Cohen

IPC: H04L7/00

CPC classification number: G10L19/167 ,  H04H60/27 ,  H04H2201/20 ,  H04J3/0632 ,  H04J3/1688 ,  H04N19/152

Abstract: A method and apparatus are disclosed for controlling a buffer in a digital audio broadcasting (DAB) communication system. The transmitter predicts the number of encoded frames, Fpred, in the buffer having a limited level and transmits the value, Fpred, to the receiver with the frame. If the transmitter determines that the decoder buffer level is high, the frames being generated by the encoder are small and additional bits are allocated to each frame for each of the N programs. Likewise, if the transmitter determines that the decoder buffer level is becoming low, the frames being generated by the encoder are big and fewer bits are allocated to each frame for each of the N programs. The transmitted predicted buffer level, Fpred, can also be employed to (i) determine when the decoder should commence decoding frames; and (ii) synchronize the transmitter and the receiver clock using feedback depending on the compared level of the decoder to the actual level to Fpred.

Abstract translation: 公开了一种用于控制数字音频广播（DAB）通信系统中的缓冲器的方法和装置。 发射机预测具有有限电平的缓冲器中的编码帧数目Fpred，并将该值Fpred发送给具有帧的接收机。 如果发射机确定解码器缓冲器电平为高，则由编码器产生的帧较小，并且对于N个节目中的每个节目的每个帧分配附加比特。 类似地，如果发射机确定解码器缓冲器电平变低，则由编码器产生的帧较大，并且对于N个节目中的每个节目，每个帧分配较少的比特。 发送的预测缓冲器电平Fpred也可以用于（i）确定解码器何时开始解码帧; 和（ii）使用反馈取决于解码器的比较水平与Fpred的实际水平来同步发射机和接收机时钟。

公开(公告)号：US08654990B2

公开(公告)日：2014-02-18

申请号：US13147940

申请日：2010-02-09

Applicant: Christof Faller

Inventor： Christof Faller

IPC: H04R3/00

CPC classification number: H04R3/005 ,  G10K11/178 ,  H04R2410/01 ,  H04R2430/20

Abstract: A system and method for use in filtering of an acoustic signal are provided for producing an output signal of attenuated amount of diffuse sound in accordance with predetermined parameters of desired output directional response and required attenuation of diffuse sound. The system includes a filtration module and a filter generation module including a directional analysis module and filter construction module.

Abstract translation: 提供用于对声信号进行滤波的系统和方法，用于根据期望的输出方向响应的预定参数和漫反射声音的所需衰减产生衰减量的扩散声音的输出信号。 该系统包括过滤模块和包括定向分析模块和过滤器构造模块的过滤器生成模块。