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    VORRICHTUNG UND VERFAHREN ZUM UMSETZEN IN EINE TRANSFORMIERTE DARSTELLUNG ODER ZUM INVERSEN UMSETZEN DER TRANSFORMIERTEN DARSTELLUNG
    41.
    发明公开
    VORRICHTUNG UND VERFAHREN ZUM UMSETZEN IN EINE TRANSFORMIERTE DARSTELLUNG ODER ZUM INVERSEN UMSETZEN DER TRANSFORMIERTEN DARSTELLUNG 有权
    设备和方法转换成变换表示或反向执行变换表示

    公开(公告)号：EP1609084A2

    公开(公告)日：2005-12-28

    申请号：EP04740658.2

    申请日：2004-07-05

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

    发明人： GEIGER, Ralf ,  SCHULLER, Gerald ,  SPORER, Thomas

    IPC分类号： G06F17/14 ,  G10L19/02 ,  G06T9/00 ,  H04N7/30

    CPC分类号： H04N19/60 ,  G06F17/147 ,  G10L19/0017 ,  G10L19/0212

    摘要： In order to convert a first and second block of discrete values into a transformed representation, the first block is transformed (102) according to a first transformation rule, after which it is rounded (104). The rounded transformed values are subsequently summed up (106) with the second block of original discrete values in order to then process (108) the summation result according to a second transformation rule. The initial values of the transformation are, in turn, rounded (110) using the second transformation rule, and are subsequently subtracted (112) from the original discrete values of the first block of discrete values in order to obtain a block of integer initial values of the transformed representation. By using this multi-dimensional lifting schema, a lossless integer transformation is achieved that, by employing the same transcription rules, can, however, be undone with inverted signs during the summation or subtraction so that an inverse integer transformation can also be achieved. In comparison to dividing a transformation in rotations, a distinctly reduced computational complexity is achieved and an accumulation of approximation errors is avoided.

    VORRICHTUNG UND VERFAHREN ZUM ANALYSIEREN EINES INFORMATIONSSIGNALS
    42.
    发明公开
    VORRICHTUNG UND VERFAHREN ZUM ANALYSIEREN EINES INFORMATIONSSIGNALS 有权
    VORRICHTUNG UND VERFAHREN ZUM ANALYSIEREN EINES AUDIO-INFORMATIONSSIGNALS

    公开(公告)号：EP1606798A1

    公开(公告)日：2005-12-21

    申请号：EP04721523.1

    申请日：2004-03-18

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

    发明人： UHLE, Christian ,  DITTMAR, Christian ,  SPORER, Thomas

    IPC分类号： G10L21/02

    CPC分类号： G10L21/0272 ,  G06K9/6242 ,  G06K9/6245 ,  G10H1/40 ,  G10H2210/056

    摘要： In order to analyse an information signal consisting of the superposition of partial signals, a partial signal being emitted by an individual source, first and foremost an information signal is divided into several component signals. Afterwards, one or several characteristics identified in such a way that they provide information on the content of the component signal are calculated (16) for each component signal. The component signals are assigned to at least two subspaces on the basis of the characteristics calculated for the component signals. An efficient and meaningful, with respect to an existing audio scene, division into subspaces is obtained by extracting characteristics at the level of component signals.

    摘要翻译： 为了分析由部分信号的叠加组成的信息信号，其中部分信号源自各个源，信息信号首先被分解成若干分量信号。 然后针对每个分量信号计算一个或多个特征，其中定义特征，使得它/它们提供关于分量信号的信息内容的语句。 最后，基于为分量信号计算的特征，执行分量信号与至少两个子空间的关联。 通过在分量信号电平上的特征提取，实现了相对于当前音频场景有意义的有效子空间分解。

    GEHÖRANGEPASSTE QUALITÄTSBEURTEILUNG VON AUDIOSIGNALEN
    45.
    发明授权
    GEHÖRANGEPASSTE QUALITÄTSBEURTEILUNG VON AUDIOSIGNALEN 失效
    听力音频信号的调整后的质量评价

    公开(公告)号：EP0938831B1

    公开(公告)日：2001-12-19

    申请号：EP97910410.6

    申请日：1997-10-02

    申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

    发明人： SEITZER, Dieter ,  SPORER, Thomas

    IPC分类号： H04S1/00 ,  H04R29/00

    CPC分类号： H04S1/007 ,  G10L25/69

    摘要： In a method for assessing the quality of an audio test signal derived from an audio reference signal by coding and decoding, the audio test signal is compared with the audio reference signal, as it were, behind the cochlea of the human ear. All masking effects as well as the transmission function of the ear are equally applied to the audio reference signal and the audio test signal. To this end, the audio test signal is broken down according to its spectral composition by means of a first bank of filters consisting of filters overlapping in frequency and defining spectral regions, said filters having differing filtering functions each determined on the basis of the excitation curve of the human ear with respect to the respective filter center frequency. The audio reference signal is also broken down according to its spectral composition into partial audio reference signals by means of a second bank of filters coinciding with the first bank of filters. Subsequently, a level difference by spectral regions is formed between the partial audio test signals and the partial audio reference signals belonging to the same spectral regions. To assess the quality of the audio test signal, a detection probability is determined, by spectral regions, on the basis of the respective level difference so as to detect a coding error of the audio test signal in the spectral region concerned.