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1.发明授权Method for measuring the conservation of stereophonic audio signals and method for identifying jointly coded stereophonic audio signals 失效用于测量立体声音频信号的保存的方法和用于识别联合编码的立体声音频信号的方法
公开(公告)号：US5926553A
公开(公告)日：1999-07-20
申请号：US817749
申请日：1997-07-21
摘要： Jointly processed stereophonic audio signal properties are identified using a stereophonic signal as reference signal and creating a signal for testing by processing the stereophonic signal, e.g. by coding and subsequently decoding it. Both signals are transformed into the frequency domain to create representative spectral data for the respective subbands. Correlation coefficients are determined for each subband both of the reference signal and also of the signal for testing on the basis of the spectral data of the channels of the reference signal or of the signal for testing. From the comparison of the correlation coefficients belonging to the same subband, jointly processed stereophonic audio signals are detected if at least one of the correlation coefficients of the signal for testing greatly exceeds the correlation coefficient of the reference signal for the same subband.
摘要翻译： PCT No.PCT / EP95 / 04008 Sec。 371日期1997年7月21日 102（e）日期1997年7月21日PCT提交1995年10月11日PCT公布。 出版物WO96 / 12384 日期：1996年04月25日使用立体声信号作为参考信号来识别立体声音频信号特性，并通过处理立体声信号来产生用于测试的信号。 通过编码并随后对其进行解码。 两个信号被转换成频域以产生各个子带的代表性光谱数据。 基于参考信号或测试信号的频谱数据，确定参考信号和测试信号的每个子带的相关系数。 从属于相同子带的相关系数的比较来看，如果用于测试的信号的相关系数中的至少一个大大超过相同子带的参考信号的相关系数，则检测出联合处理的立体声音频信号。
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2.发明授权Method for determining the type of coding to be selected for coding at least two signals 失效用于确定要选择用于编码至少两个信号的编码类型的方法
公开(公告)号：US5736943A
公开(公告)日：1998-04-07
申请号：US557046
申请日：1996-05-31
IPC分类号： G10L19/00 , G10L19/008 , G10L19/02 , H03M7/30 , H04B1/66 , H04H1/00 , H04H20/47 , H04H60/09 , H04N5/00 , H04S1/00 , D03M7/00
CPC分类号： H04S1/007 , G10L19/008 , H04B1/665
摘要： In the case of coding a plurality of signals which are not independent of e another, a selection of the suitable type of coding is made as a function of a similarity measure. According to one aspect of the invention, the similarity measure is determined by firstly coding one of the signals according to the intensity-stereo method and then decoding it in order to create a signal affected by coding error, whereupon the latter signal and the associated non-coded signal are transformed into the frequency domain. In the frequency domain, a selection or evaluation of the actually audible spectral components, as well as of the signal affected by coding error and of the associated signal not affected by coding error, is undertaken using a listening threshold which is determined by a psycho-acoustic calculation. Intensity-stereo coding is undertaken in the case of a high similarity measure, whereas otherwise a separate coding of the channels is performed.
摘要翻译： PCT No.PCT / EP94 / 02250 Sec。 371日期：1996年5月31日 102（e）日期1996年5月31日PCT提交1994年7月8日PCT公布。 公开号WO95 / 08227 日期1995年3月23日在对不是彼此独立的多个信号进行编码的情况下，作为相似性度量的函数进行适当的编码类型的选择。 根据本发明的一个方面，通过首先根据强度立体声方法对信号之一进行编码，然后对其进行解码来确定相似性度量，以便产生受编码错误影响的信号，由此产生后一信号和相关联的非信号 编码信号被转换成频域。 在频域中，使用由精神病理学家确定的听力阈值来进行实际可听频谱分量的选择或评估，以及受编码错误影响的信号和不受编码错误影响的相关信号， 声学计算。 在高相似性度量的情况下进行强度立体声编码，否则执行信道的单独编码。
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公开(公告)号：US5701346A
公开(公告)日：1997-12-23
申请号：US704730
申请日：1996-09-12
摘要： In a method of coding a plurality of audio signals, the left and the right basic channel as well as the central channel are combined by joint stereo coding so as to obtain a jointly coded signal, which is decoded so as to provide simulated decoded signals. The simulated decoded signals and two surround channels are combined by matricization by means of a compatibility matrix so as to form compatible signals which are suitable for decoding by existing decoders. In order to avoid audible disturbances caused by excessive energy contents of the compatible signals, which would occur if joint stereo coding and decoding were carried out prior to carrying out the matricization, the compatible signals or the simulated decoded signals are dynamically weighted by means of a dynamic correction factor in such a way that the compatible signals are approximated with regard to their energy to the energy of signals which would be obtained if the two basic channels and the central channel as well as the surround channels were matricized directly.
摘要翻译： PCT No.PCT / EP95 / 00378 371日期：1996年9月12日 102（e）日期1996年9月12日PCT提交1995年2月2日PCT公布。 公开号WO95 / 26083 日期1995年9月28日在一种对多个音频信号进行编码的方法中，通过联合立体声编码来组合左右基本频道以及中央频道，以获得联合编码的信号，其被解码为 提供模拟解码信号。 模拟的解码信号和两个环绕声道通过借助于兼容性矩阵的校准来组合，以形成适合于现有解码器解码的兼容信号。 为了避免由于兼容信号的能量含量过多引起的可听到的干扰，如果在执行基准化之前进行了联合的立体声编码和解码，则会发生兼容信号或模拟解码信号通过 动态校正因子，使得将兼容信号相对于其能量相对于如果两个基本信道和中央信道以及环绕信道被直接校准而获得的信号的能量近似即可。
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公开(公告)号：US5014318A
公开(公告)日：1991-05-07
申请号：US439394
申请日：1989-10-25
申请人： Hartmut Schott , Dieter Seitzer , Heinz Gerhauser , Karlheinz Brandenburg , Ernst Eberlein , Stefan Krageloh , Rolf Kapust , Harald Popp
发明人： Hartmut Schott , Dieter Seitzer , Heinz Gerhauser , Karlheinz Brandenburg , Ernst Eberlein , Stefan Krageloh , Rolf Kapust , Harald Popp
摘要： Disclosed is an apparatus for checking audio signal processing systems. The apparatus has the following features:the apparatus is provided with a first input connection, to which the input signal of the audio processing system to be checked is transmitted, a second input connection, to which the output signal of said system is transmitted, and a signal processor.said signal processor ascertains the signal delay time of said system to be checked by means of correlating said signals received at said two input connections,said signal processor always composes the difference signal from said signal received at said first input connection during a specific time span and said signal received at said second input connection, lagging by the signal delay time,said signal processor ascertains the spectral composition of said signal received at said first input connection during said specific time span and of said respective difference signal,said signal processor ascertains the hearing threshold of the human ear from said spectral composition and compares the ascertained hearing threshold with the respective difference signal.
摘要翻译： PCT No.PCT / DE89 / 00110 Sec。 371日期：1989年10月25日 102（e）日期1989年10月25日PCT提交1989年2月25日PCT公布。 公开号WO89 / 08357 日期为1989年9月8日。公开是用于检查音频信号处理系统的装置。 该装置具有以下特征：该装置具有第一输入连接，待检查的音频处理系统的输入信号被发送到该第一输入连接，传输所述系统的输出信号的第二输入连接;以及 信号处理器。 所述信号处理器通过将在所述两个输入连接处接收到的所述信号相关来确定要检查的所述系统的信号延迟时间，所述信号处理器总是在特定时间跨度期间组合来自在所述第一输入连接处接收的所述信号的差信号， 所述信号在所述第二输入连接处被接收，滞后于所述信号延迟时间，所述信号处理器确定在所述特定时间跨度期间在所述第一输入连接处接收到的所述信号的频谱组成以及所述各个差分信号，所述信号处理器确定听觉 阈值，并将所确定的听力阈值与相应的差分信号进行比较。
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公开(公告)号：US6115688A
公开(公告)日：2000-09-05
申请号：US51347
申请日：1998-07-01
CPC分类号： H04B1/665
摘要： In coding of an audio signal, coded signals with low quality and bit rate on the one hand and coded signals with high quality and bit rate on the other hand are transmitted to a decoder. At first, the audio signal is coded with low bit rate and is transmitted to the decoder before an additional coded signal is transmitted to the decoder, which either alone or together with the first coded signal upon decoding thereof provides a decoded signal with high quality within the decoder. In this manner, a low-quality decoded signal is generated first in the decoder before decoding of the high-quality signal is possible.
摘要翻译： PCT No.PCT / EP96 / 03609 Sec。 371日期：1998年7月1日 102（e）1998年7月1日PCT PCT 1996年8月16日PCT公布。 公开号WO97 / 14229 日期1997年04月17日在编码音频信号时，一方面具有低质量和比特率的编码信号和另一方面具有高质量和比特率的编码信号被传送到解码器。 首先，以低比特率对音频信号进行编码，并且在将附加的编码信号发送到解码器之前被传送到解码器，解码器单独或与解码时的第一编码信号一起提供高质量的解码信号 解码器。 以这种方式，在对高质量信号进行解码之前，首先在解码器中产生低质量的解码信号。
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公开(公告)号：US5918203A
公开(公告)日：1999-06-29
申请号：US894844
申请日：1997-08-13
CPC分类号： H03G5/005
摘要： The tonality of an audio signal is determined by a method which includes the steps of blockwise frequency transforming a digital input signal x(n) to create a real positive-value representation X(k) of the input signal, where k designates the index of a frequency line, and determining the tonality T of the signal component for the frequency line k according to the following equation: ##EQU1## where F.sub.1 is the filter function of a first digital filter with a first, differentiating characteristic, F.sub.2 is the filter function of a second digital filter with a second, flat or integrating characteristic or with a characteristic which is less strongly differentiating than the first characteristic, and d.sub.1 and d.sub.2 are integer constants which, depending on the filter parameters, are so chosen that the delays of the filters are compensated for in each case.
摘要翻译： PCT No.PCT / EP96 / 00550 Sec。 371日期1997年8月13日 102（e）日期1997年8月13日PCT 1996年2月9日PCT公布。 WO96 / 25649 PCT出版物 日期1996年8月22日音频信号的音调由包括对数字输入信号x（n）进行块状频率变换以产生输入信号的实数正值表示X（k）的步骤的方法确定，其中 k表示频率线的索引，并且根据以下等式确定频率线k的信号分量的音调T：其中F1是具有第一微分特性的第一数字滤波器的滤波器函数，F2是 第二数字滤波器的滤波器功能具有第二，平坦或积分特性或具有与第一特性不太强区别的特性，d1和d2是整数常数，其根据滤波器参数被选择为使得延迟 在每种情况下补偿滤波器。
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公开(公告)号：US07512539B2
公开(公告)日：2009-03-31
申请号：US10479398
申请日：2002-05-28
CPC分类号： G10L19/0212 , G06F17/147
摘要： An integer transform, which provides integer output values, carries out the TDAC function of a MDCT in the time domain before the forward transform. In overlapping windows, this results in a Givens rotation which may be represented by lifting matrices, wherein time-discrete sampled values of an audio signal may at first be summed up on a pair-wise basis to build a vector so as to be sequentially provided with a lifting matrix. After each multiplication of a vector by a lifting matrix, a rounding step is carried out such that, on the output-side, only integers will result. By transforming the windowed integer sampled value with an integer transform, a spectral representation with integer spectral values may be obtained. The inverse mapping with an inverse rotation matrix and corresponding inverse lifting matrices results in an exact reconstruction.
摘要翻译： 提供整数输出值的整数变换在正向变换之前的时域中执行MDCT的TDAC功能。 在重叠窗口中，这导致Givens旋转，其可以由提升矩阵表示，其中音频信号的时间离散采样值可以首先在成对的基础上相加以构建向量以便顺序地提供 与提升矩阵。 在通过提升矩阵对向量进行每次乘法之后，执行舍入步骤，使得在输出侧仅将导致整数。 通过用整数变换变换窗口整数采样值，可以获得具有整数频谱值的频谱表示。 具有逆旋转矩阵和对应的反提升矩阵的逆映射导致精确重建。
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公开(公告)号：US07035742B2
公开(公告)日：2006-04-25
申请号：US10950309
申请日：2004-09-23
IPC分类号： G06F19/00
CPC分类号： G10H3/125 , G10H2240/135 , G10L15/02 , G10L15/10
摘要： For characterizing an information signal having an amplitude-time waveform with local extreme values, at first the local extreme values of the information signal are determined, wherein a local extreme value is defined by a time instant and an amplitude. Furthermore, area information of valleys or mountains of the information signal in case of a one-dimensional amplitude of the information signal or volume information in case of a two-dimensional amplitude of the information signal of valleys or mountains is ascertained. A valley or mountain is defined by a temporal section of the information signal, wherein the section of the information signal extends from the time instant of a local extreme value to a temporarily adjacent value of the information signal having the same amplitude as the local extreme value. Area or volume information of several mountains or valleys is characteristic for the information signal and permits further characterization of the information signal, build-up of an information signal database, or identification of an information signal on the basis of an existing information signal database. Area or volume information is on the one hand characteristic for the information signal and on the other hand, due to its integral nature, robust against information signal changes in form of overlays or distortions.
摘要翻译： 为了表征具有局部极值的幅度 - 时间波形的信息信号，首先确定信息信号的局部极值，其中局部极值由时刻和幅度定义。 此外，确定在谷或山信息信号的二维幅度的情况下，在信息信号的一维幅度或体积信息的情况下信息信号的谷或山的区域信息。 谷或山由信息信号的时间段定义，其中信息信号的部分从本地极值的时刻延伸到具有与局部极值相同幅度的信息信号的临时相邻值 。 几个山脉或山谷的区域或体积信息是信息信号的特征，并且允许信息信号的进一步表征，信息信号数据库的建立或基于现有信息信号数据库的信息信号的识别。 区域或体积信息一方面是信息信号的特征，另一方面，由于其整体性质，对叠加或变形形式的信息信号变化是鲁棒的。
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9.发明申请Device and method for generating encrypted data, for decrypting encrypted data and for generating re-signed data 审中-公开用于生成加密数据的装置和方法，用于解密加密数据和生成重新签名的数据公开(公告)号：US20050135613A1
公开(公告)日：2005-06-23
申请号：US10985479
申请日：2004-11-10
申请人： Karlheinz Brandenburg , Christian Neubauer , Ralph Kulessa , Frank Siebenharr , Wolfgang Spinnler
发明人： Karlheinz Brandenburg , Christian Neubauer , Ralph Kulessa , Frank Siebenharr , Wolfgang Spinnler
CPC分类号： G06F21/10 , G06F2221/0737 , G06F2221/2107
摘要： Devices and methods for generating encrypted data, for playing encrypted data and for re-signing originally signed encrypted data are based on the encrypted data, apart from the encrypted media information, to include the information required for decrypting the data and additionally a signature of who has generated the encrypted data. Thus the origin of the encrypted data can be traced back. In particular, passing on the encrypted data to a limited extent by the producer of the *encrypted data, for example to friends or acquaintances, is allowed, while only a mass reproduction of the encrypted data is considered as pirate copying. The pirate copier can, however, be found out with the help of the signature, wherein the signature is optionally protected by an embedded watermark signature. Because this is a concept wherein, when being used legally, only encrypted data occur, the unauthorized removal of the encryption is a statutory offence. The inventive concept makes possible finding the offender and at the same time considers ownerships of the operators with regard to a limited passing-on of media information, and thus has the potential of being accepted on the market.
摘要翻译： 用于生成加密数据，用于播放加密数据和重新签署原始签名的加密数据的装置和方法基于加密数据，除了加密的媒体信息之外，还包括解密数据所需的信息，另外还包括谁的签名 已生成加密数据。 因此，可以追溯加密数据的来源。 特别地，允许由加密数据的制作者（例如，朋友或熟人）在有限程度上传递加密数据，而仅将加密数据的大规模再现视为盗版复制。 然而，在签名的帮助下，可以发现盗版复印机，其中签名可选地被嵌入的水印签名保护。 因为这是一个概念，其中当被合法使用时，仅发生加密的数据，未经授权的加密删除是法定的。 本发明的概念使得有可能发现犯罪者，同时考虑到运营商对媒体信息传递有限的所有权，因此具有被市场接受的潜力。
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公开(公告)号：US06370507B1
公开(公告)日：2002-04-09
申请号：US09319066
申请日：1999-05-28
IPC分类号： G10L1902
CPC分类号： G10L19/24 , G10L19/0204
摘要： In a method of coding discrete time signals (X1) sampled with a first sampling rate, second time signals (x2) are generated using the first time signals having a bandwidth corresponding to a second sampling rate, with the second sampling rate being lower than the first sampling rate. The second time signals are coded in accordance with a first coding algorithm. The coded second signals (X2c) are decoded again in order to obtain coded/decoded second time signals (X2cd) having a bandwidth corresponding to the second sampling frequency. The first time signals, by frequency domain transformation, become first spectral values (X1). Second spectral values (X2cd) are generated from the coded/decoded second time signals, the second spectral values being a representation of the coded/decoded time signals in the frequency domain. To obtain weighted spectral values, the first spectral values are weighted by means of the second spectral values, with the first and second spectral values having the same frequency and time resolution. The weighted spectral values (Xb) are coded in accordance with a second coding algorithm in consideration of a psychoacoustic model and written into a bit stream. Weighting the first spectral values and the second spectral values comprises the subtraction of the second spectral values from the first spectral values in to obtain differential spectral values.
摘要翻译： 在对以第一采样率采样的离散时间信号（X1）进行编码的方法中，使用具有对应于第二采样率的带宽的第一时间信号来生成第二时间信号（x2），其中第二采样率低于 第一次采样率。 第二时间信号根据第一编码算法进行编码。 再次对编码的第二信号（X2c）进行解码，以获得具有对应于第二采样频率的带宽的编码/解码的第二时间信号（X2cd）。 第一次通过频域变换的信号变为第一个光谱值（X1）。 从编码/解码的第二时间信号产生第二频谱值（X2cd），第二频谱值是频域中编码/解码的时间信号的表示。 为了获得加权光谱值，通过第二光谱值对第一光谱值进行加权，其中第一和第二光谱值具有相同的频率和时间分辨率。 考虑到心理声学模型并将其写入比特流，加权频谱值（Xb）根据第二编码算法进行编码。 加权第一光谱值和第二光谱值包括从第一光谱值减去第二光谱值以获得差分光谱值。
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