公开(公告)号：US20060153408A1

公开(公告)日：2006-07-13

申请号：US11032689

申请日：2005-01-10

Applicant: Christof Faller ,  Juergen Herre

Inventor： Christof Faller ,  Juergen Herre

IPC: H04R5/02

CPC classification number: G10L19/008

Abstract: At an audio encoder, cue codes are generated for one or more audio channels, wherein a combined cue code (e.g., a combined inter-channel correlation (ICC) code) is generated by combining two or more estimated cue codes, each estimated cue code estimated from a group of two or more channels. At an audio decoder, E transmitted audio channel(s) are decoded to generate C playback audio channels. Received cue codes include a combined cue code (e.g., a combined ICC code). 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 two or more derived cue codes are derived from the combined cue code, and each derived cue code is applied to generate two or more synthesized channels.

Abstract translation: 在音频编码器处，为一个或多个音频通道生成提示码，其中通过组合两个或多个估计的提示码来生成组合的提示码（例如，组合的信道间相关（ICC）码），每个估计的提示码 从一组两个或多个渠道估计。 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。 接收的提示码包括组合的提示码（例如，组合的ICC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信道来合成一个或多个播放频道，其中从组合提示码导出两个或更多个派生提示码，并且应用每个派生的提示码以生成两个或多个合成频道。

公开(公告)号：US09668078B2

公开(公告)日：2017-05-30

申请号：US13591255

申请日：2012-08-22

Applicant: Christof Faller

Inventor： Christof Faller

IPC: H04R5/00 ,  H04B1/00 ,  H04S3/00 ,  H04S7/00 ,  G10L19/008

CPC classification number: G10L19/02 ,  G10L19/008 ,  G10L19/0204 ,  H04S3/00 ,  H04S3/008 ,  H04S7/00 ,  H04S7/307 ,  H04S2420/03 ,  H04S2420/13

Abstract: The following coding scenario is addressed: A number of audio source signals need to be transmitted or stored for the purpose of mixing wave field synthesis, multi-channel surround, or stereo signals after decoding the source signals. The proposed technique offers significant coding gain when jointly coding the source signals, compared to separately coding them, even when no redundancy is present between the source signals. This is possible by considering statistical properties of the source signals, the properties of mixing techniques, and spatial hearing. The sum of the source signals is transmitted plus the statistical properties of the source signals which mostly determine the perceptually important spatial cues of the final mixed audio channels. Source signals are recovered at the receiver such that their statistical properties approximate the corresponding properties of the original source signals. Subjective evaluations indicate that high audio quality is achieved by the proposed scheme.

公开(公告)号：US09183839B2

公开(公告)日：2015-11-10

申请号：US13207586

申请日：2011-08-11

Applicant: Christof Faller

Inventor： Christof Faller

IPC: H04R5/00 ,  G10L19/008 ,  H04S5/00 ,  H04S7/00 ,  H04R5/027

CPC classification number: G10L19/008 ,  H04R5/027 ,  H04S5/005 ,  H04S7/30 ,  H04S2420/03

Abstract: An apparatus for providing a set of spatial cues associated with an upmix audio signal having more than two channels on the basis of a two-channel microphone signal has a signal analyzer and a spatial side information generator. The signal analyzer is configured to obtain a component energy information and a direction information on the basis of the two-channel microphone signal, such that the component energy information describes estimates of energies of a direct sound component of the two-channel microphone signal and of a diffuse sound component of the two-channel microphone signal, and such that the directional information describes an estimate of a direction from which the direct sound component of the two-channel microphone signal originates. The spatial side information generator is configured to map the component energy information and the direction information onto a spatial cue information describing the set of spatial cues associated with an upmix audio signal having more than two channels.

Abstract translation: 一种用于提供与基于双声道麦克风信号的具有多于两个声道的上混音频信号相关联的一组空间提示的装置具有信号分析器和空间侧信息发生器。 信号分析器被配置为基于双声道麦克风信号获得分量能量信息和方向信息，使得分量能量信息描述双声道麦克风信号的直接声音分量的能量的估计和 双声道麦克风信号的漫射声分量，并且使得方向信息描述了来自双声道麦克风信号的直接声音分量的方向的估计。 空间侧信息发生器被配置为将分量能量信息和方向信息映射到描述与具有多于两个信道的上混音频信号相关联的空间提示集的空间提示信息。

公开(公告)号：US08295493B2

公开(公告)日：2012-10-23

申请号：US12065502

申请日：2006-09-01

Applicant: Christof Faller

Inventor： Christof Faller

IPC: H04R5/00

CPC classification number: H04S3/002 ,  H04S5/00

Abstract: An exemplary embodiment of the invention can generate multiple output audio signals from multiple input audio signals, in which the number of output signals is equal to or higher than the number of input signals. The embodiment includes computing one or more independent sound subbands representing signal components which are independent between the input subbands; computing one or more localized direct sound subbands representing signal components which are contained in more than one of the input subbands and direction factors representing the ratios with which these signal components are contained in two or more input subbands; generating the output subband signals, where each output subband signal is a linear combination of the independent sound subbands and the localized direct sound subbands; and converting the output subband signals to time domain audio signals.

Abstract translation: 本发明的示例性实施例可以从多个输入音频信号生成多个输出音频信号，其中输出信号的数量等于或高于输入信号的数量。 该实施例包括计算表示在输入子带之间独立的信号分量的一个或多个独立声音子带; 计算表示信号分量的一个或多个局部直接声音子带，其包含在多于一个输入子带中的方向因子和表示这些信号分量包含在两个或多个输入子带中的比率的方向因子; 产生输出子带信号，其中每个输出子带信号是独立声子带和局部直接声子带的线性组合; 并将输出子带信号转换成时域音频信号。

公开(公告)号：US08213641B2

公开(公告)日：2012-07-03

申请号：US11744156

申请日：2007-05-03

Applicant: Christof Faller ,  Hyen O. Oh ,  Yang Won Jung

Inventor： Christof Faller ,  Hyen O. Oh ,  Yang Won Jung

IPC: H04B1/00 ,  H04R5/00 ,  G06F17/00

CPC classification number: H04S3/008 ,  G10L19/0018 ,  G10L19/008 ,  H04S3/00 ,  H04S2420/03

Abstract: One or more attributes (e.g., pan, gain, etc.) associated with one or more objects (e.g., an instrument) of a stereo or multi-channel audio signal can be modified to provide remix capability. In some implementations, a method can include obtaining a first plural-channel audio signal having one or more objects; obtaining side information, at least some of which represents a relation between the first plural-channel audio signal and the one or more objects; obtaining a set of mix parameters; and generating a second plural-channel audio signal using the side information and the set of mix parameters.

Abstract translation: 可以修改与立体声或多声道音频信号的一个或多个对象（例如，仪器）相关联的一个或多个属性（例如，平移，增益等）以提供混音能力。 在一些实现中，方法可以包括获得具有一个或多个对象的第一多声道音频信号; 获取侧信息，其中至少一些表示第一多声道音频信号和一个或多个对象之间的关系; 获得一组混合参数; 以及使用所述边信息和所述混合参数的集合来生成第二多声道音频信号。

公开(公告)号：US08160888B2

公开(公告)日：2012-04-17

申请号：US11995700

申请日：2006-07-12

Applicant: Dirk Jeroen Breebaart ,  Lars Falck Villemoes ,  Heiko Purnhagen ,  Christof Faller

Inventor： Dirk Jeroen Breebaart ,  Lars Falck Villemoes ,  Heiko Purnhagen ,  Christof Faller

IPC: G10L19/00

CPC classification number: H04S3/008 ,  G10L19/008

Abstract: A decoder (115) generates a multi channel audio signal, such as a surround sound signal, from a received first signal. The multi-channel signal comprises a second set of audio channels and the first signal comprises a first set of audio channels. The decoder (115) comprises a receiver (401) which receives the first signal. The receiver (401) is coupled to an estimate processor (405) which generates estimated parametric data for the second set of audio channels in response to characteristics of the first set of audio channels. The estimated parametric data relates characteristics of the second set of audio channels to characteristics of the first set of audio channels. The decoder (115) furthermore comprises a spatial audio decoder (403) which decodes the first signal in response to the estimated parametric data to generate the multi-channel signal comprising the second set of channels. The invention allows use of spatial audio decoding with signals that are not encoded by a spatial audio encoder.

Abstract translation: 解码器（115）从接收的第一信号生成诸如环绕声信号的多声道音频信号。 多声道信号包括第二组音频通道，第一信号包括第一组音频通道。 解码器（115）包括接收第一信号的接收机（401）。 接收器（401）耦合到估计处理器（405），该估计处理器响应于第一组音频通道的特性而产生第二组音频通道的估计参数数据。 估计的参数数据将第二组音频通道的特性与第一组音频通道的特性相关联。 解码器（115）还包括空间音频解码器（403），其响应于所估计的参数数据对第一信号进行解码，以产生包括第二组信道的多信道信号。 本发明允许对空间音频编码器未编码的信号使用空间音频解码。

公开(公告)号：US20100296669A1

公开(公告)日：2010-11-25

申请号：US12719489

申请日：2010-03-08

Applicant: Hyen-O Oh ,  Alexis Favrot ,  Christof Faller ,  Myung Hoon Lee ,  Jong Ha Moon

Inventor： Hyen-O Oh ,  Alexis Favrot ,  Christof Faller ,  Myung Hoon Lee ,  Jong Ha Moon

IPC: H03G3/02

CPC classification number: G10K11/1784 ,  G10K11/178 ,  G10L21/0208 ,  H03G1/02 ,  H03G3/001 ,  H03G5/165 ,  H03G7/002 ,  H03G9/005 ,  H03G9/025

Abstract: A method of processing an audio signal is disclosed. The present invention includes receiving, by an audio processing apparatus, an input signal; receiving user gain input; generating a linear gain factor and a non-linear gain factor using the user gain input; modifying the non-linear gain factor using absolute threshold of hearing and power of the input signal to generate a modified non-linear gain factor; and, applying the linear gain factor and the modified non-linear gain factor to the audio signal.

Abstract translation: 公开了一种处理音频信号的方法。 本发明包括由音频处理装置接收输入信号; 接收用户增益输入; 使用用户增益输入产生线性增益因子和非线性增益因子; 使用输入信号的听觉和功率的绝对阈值来修改非线性增益因子以产生修改的非线性增益因子; 以及将线性增益因子和修改的非线性增益因子应用于音频信号。

公开(公告)号：US07644003B2

公开(公告)日：2010-01-05

申请号：US10936464

申请日：2004-09-08

Applicant: Frank Baumgarte ,  Jiashu Chen ,  Christof Faller

Inventor： Frank Baumgarte ,  Jiashu Chen ,  Christof Faller

IPC: G10L11/04 ,  G10L19/00 ,  G10L21/00 ,  H04R5/00 ,  H04B14/04

CPC classification number: H04S1/007 ,  G10L15/22 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/0212 ,  H04S3/002 ,  H04S3/02 ,  H04S5/00 ,  H04S5/005 ,  H04S2420/03

Abstract: Generic and specific C-to-E binaural cue coding (BCC) schemes are described, including those in which one or more of the input channels are transmitted as unmodified channels that are not downmixed at the BCC encoder and not upmixed at the BCC decoder. The specific BCC schemes described include 5-to-2, 6-to-5, 7-to-5, 6.1-to-5.1, 7.1-to-5.1, and 6.2-to-5.1, where “0.1” indicates a single low-frequency effects (LFE) channel and “0.2” indicates two LFE channels.

Abstract translation: 描述了通用和特定的C-to-E双耳提示编码（BCC）方案，包括其中一个或多个输入通道作为未修改的通道发送的未修改的通道，其未在BCC编码器下混合，而不在BCC解码器处混合。 所描述的具体的BCC方案包括5到2,6到5,7到5,6.1到5.1,7.1到5.1和6.2到5.1，其中“0.1”表示单个 低频效应（LFE）通道和“0.2”表示两个LFE通道。

公开(公告)号：US20090319281A1

公开(公告)日：2009-12-24

申请号：US12548773

申请日：2009-08-27

Applicant: Frank Baumgarte ,  Jiashu Chen ,  Christof Faller

Inventor： Frank Baumgarte ,  Jiashu Chen ,  Christof Faller

IPC: G10L19/00

CPC classification number: H04S1/007 ,  G10L15/22 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/0212 ,  H04S3/002 ,  H04S3/02 ,  H04S5/00 ,  H04S5/005 ,  H04S2420/03

Abstract: Generic and specific C-to-E binaural cue coding (BCC) schemes are described, including those in which one or more of the input channels are transmitted as unmodified channels that are not downmixed at the BCC encoder and not upmixed at the BCC decoder. The specific BCC schemes described include 5-to-2, 6-to-5, 7-to-5, 6.1-to-5.1, 7.1-to-5.1, and 6.2-to-5.1, where “0.1” indicates a single low-frequency effects (LFE) channel and “0.2” indicates two LFE channels.

Abstract translation: 描述了通用和特定的C-to-E双耳提示编码（BCC）方案，包括其中一个或多个输入通道作为未修改的通道发送的未修改的通道，其未在BCC编码器下混合，而不在BCC解码器处混合。 所描述的具体的BCC方案包括5到2,6到5,7到5,6.1到5.1,7.1到5.1和6.2到5.1，其中“0.1”表示单个 低频效应（LFE）通道和“0.2”表示两个LFE通道。

公开(公告)号：US20080170718A1

公开(公告)日：2008-07-17

申请号：US11652614

申请日：2007-01-12

Applicant: Christof Faller

Inventor： Christof Faller

IPC: H04R3/00

CPC classification number: H04R3/005

Abstract: The directionality of microphones is often not high enough, resulting in compromised music recording. Beamforming for getting a signal with a higher directional response is limited due to spatial aliasing, dependence of beamwidth on frequency, and a requirement of a high number of microphones. Adaptive beamforming is suitable for applications where the only aim is to optimize signal to noise ratio, but not suitable for applications where a time-invariant beamshape is required. The invention addresses these limitations, using adaptive signal processing applied to a plurality of microphone signals or other signals with an associated directionality.A method is therefore proposed to generate an output audio signal y from two or more input audio signals (x1, x2, . . . ), this method comprising the steps of: define one input signal as reference signal for each of the other input signals compute gain factors related to how much of the input signal is contained in the reference signal adjust the gain factors using a limiting function compute the output signal by subtracting from the reference signal the other input signals multiplied by the corresponding adjusted gain factors

Abstract translation: 麦克风的方向性往往不够高，导致音乐录音受损。 用于获得具有较高方向响应的信号的波束成形由于空间混叠，波束宽度对频率的依赖性以及大量麦克风的需求而受到限制。 自适应波束成形适用于唯一目标是优化信噪比的应用，但不适合需要时不变波束形状的应用。 本发明解决了这些限制，使用应用于多个麦克风信号的自适应信号处理或具有相关方向性的其他信号。 因此，提出一种从两个或多个输入音频信号（x 1，x 2，...）生成输出音频信号y的方法，该方法包括以下步骤：将一个输入信号定义为每个其他输入信号 输入信号计算与参考信号中包含多少输入信号相关的增益因子使用限制函数来调整增益因子，通过从参考信号中减去其他输入信号乘以相应的调整增益因子来计算输出信号