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    VORRICHTUNG UND VERFAHREN ZUM ERZEUGEN EINES VERSCHLÜSSELTEN AUDIO- UND/ODER VIDEODATENSTROMS
    81.
    发明授权
    VORRICHTUNG UND VERFAHREN ZUM ERZEUGEN EINES VERSCHLÜSSELTEN AUDIO- UND/ODER VIDEODATENSTROMS 有权
    装置和方法，用于生成加密的音频和/或视频数据流图

    公开(公告)号：EP1155526B1

    公开(公告)日：2005-11-30

    申请号：EP99962259.0

    申请日：1999-12-15

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

    发明人： ALLAMANCHE, Eric ,  HERRE, Jürgen ,  KOLLER, Jürgen ,  RUMP, Niels

    IPC分类号： H04K1/00 ,  H04N7/167 ,  H04N7/26

    CPC分类号： H04N7/1675 ,  H04K1/00 ,  H04N19/40 ,  H04N21/233 ,  H04N21/439

    摘要： The invention relates to a device (10) for producing an encoded data stream which represents an audio and/or video signal. Said device comprises an encoder (16) for encoding an input signal (12) to produce a data stream of a defined data stream syntax as the output signal. Said device further comprises an encryption device (18) which is coupled to the encoder (16) to influence encoding-related data (20a) and/or the output signal (20b) of the encoder in an unequivocally reversible manner on the basis of a code in such a manner that the produced encoded data stream contains useful information that differs from the useful information of a data stream that would be produced by the device without the presence of the encryption device and that the produced encoded data stream has the defined data stream syntax. The invention thus provides a flexible data stream encryption according to which the degree of encryption can be freely selected in such a manner that the user of a decoder who does not possess the code still has a rough idea of the audio and/or video signal that might cause him/her to buy the code to hear or view the audio and/or video signal in its full quality. The encoder-specific encryption and decryption concept can be implemented into already existing encoders/decoders with little effort.

    VORRICHTUNG UND VERFAHREN ZUM EINBETTEN EINES WASSERZEICHENS IN EIN AUDIOSIGNAL
    82.
    发明授权
    VORRICHTUNG UND VERFAHREN ZUM EINBETTEN EINES WASSERZEICHENS IN EIN AUDIOSIGNAL 有权
    装置和方法嵌入水印的音频信号

    公开(公告)号：EP1382038B1

    公开(公告)日：2005-06-29

    申请号：EP02740586.9

    申请日：2002-05-10

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

    发明人： HERRE, Jürgen ,  KULESSA, Ralph ,  NEUBAUER, Christian ,  SIEBENHAAR, Frank

    IPC分类号： G11B20/00

    CPC分类号： G10L19/018 ,  G10L19/02

    摘要： The invention relates to a method for embedding a watermark in an audio signal, according to which a spectral representation of the audio signal and a spectral representation of the watermark signal are first determined (14, 16). The spectral representation of the watermark signal is then processed, based on a psychoacoustic masking threshold (24) of the audio signal (22). The processed watermark signal is combined with the audio signal (18), to obtain an audio signal furnished with a watermark. The spectral representation of the watermark signal is processed iteratively in the following way: a predetermined watermark initial value (26) is first selected; the interference that has been introduced into the spectral representation by the predetermined watermark initial value after a quantization of the spectral representation of the audio signal, is determined (28). If the interference introduced by the watermark initial value is greater than the predetermined interference threshold (32), the watermark initial value is then modified until said interference introduced into the spectral representation of the audio signal by a modified watermark initial value after quantization, is less than or equal to the predetermined interference threshold. The modified watermark initial value that is obtained at the end of the iteration is used as a processed watermark signal to be combined with the audio signal. It is therefore no longer possible to weaken or remove a watermark by quantization. The invention provides complete control over the energy of the watermark, in order to ensure that a watermark is embedded into an audio signal with either the best possible degree of detectability or the best possible audio quality.

    APPARATUS, METHOD AND COMPUTER PROGRAM FOR PROVIDING ADJUSTED PARAMETERS
    88.
    发明公开
    APPARATUS, METHOD AND COMPUTER PROGRAM FOR PROVIDING ADJUSTED PARAMETERS 审中-公开

    公开(公告)号：EP4462428A2

    公开(公告)日：2024-11-13

    申请号：EP24202070.9

    申请日：2010-10-15

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

    发明人： HERRE, Jürgen ,  FALCH, Cornelia ,  TERENTIV, Leon

    IPC分类号： G10L19/008

    摘要： An apparatus for providing one or more adjusted parameters for a provision of an upmix signal representation on the basis of a downmix signal representation and a parametric side information associated with the downmix signal representation comprises a parameter adjuster. The parameter adjuster is configured to receive one or more parameters and to provide, on the basis thereof, one or more adjusted parameters. The parameter adjuster is configured to provide the one or more adjusted parameters in dependence on an average value of a plurality of parameter values, such that a distortion of the upmix signal representation caused by the use of non-optimal parameters is reduced at least for parameters deviating from optimal parameters by more than a predetermined deviation.