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    SWITCHING OF SAMPLING RATES AT AUDIO PROCESSING DEVICES
    5.
    发明公开
    SWITCHING OF SAMPLING RATES AT AUDIO PROCESSING DEVICES 审中-公开

    公开(公告)号：EP3739580A1

    公开(公告)日：2020-11-18

    申请号：EP20185071.6

    申请日：2015-08-14

    申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.

    发明人： Döhla, Stefan ,  Fuchs, Guillaume ,  Grill, Bernhard ,  Multrus, Markus ,  Pietrzyk, Grzegorz ,  Ravelli, Emmanuel ,  Schnell, Markus

    IPC分类号： G10L19/24 ,  G10L19/04 ,  G10L19/16

    摘要： Audio decoder device for decoding a bitstream, the audio decoder device comprising:
    a predictive decoder for producing a decoded audio frame from the bitstream, wherein the predictive decoder comprises a parameter decoder for producing one or more audio parameters for the decoded audio frame from the bitstream and wherein the predictive decoder comprises a synthesis filter device for producing the decoded audio frame by synthesizing the one or more audio parameters for the decoded audio frame;
    a memory device comprising one or more memories, wherein each of the memories is configured to store a memory state for the decoded audio frame, wherein the memory state for the decoded audio frame of the one or more memories is used by the synthesis filter device for synthesizing the one or more audio parameters for the decoded audio frame; and
    a memory state resampling device configured to determine the memory state for synthesizing the one or more audio parameters for the decoded audio frame, which has a sampling rate, for one or more of said memories by resampling a preceding memory state for synthesizing one or more audio parameters for a preceding decoded audio frame, which has a preceding sampling rate being different from the sampling rate of the decoded audio frame, for one or more of said memories and to store the memory state for synthesizing of the one or more audio parameters for the decoded audio frame for one or more of said memories into the respective memory.

    Encoder, decoder, system and methods for encoding and decoding
    6.
    发明公开
    Encoder, decoder, system and methods for encoding and decoding 审中-公开
    Codierer，Decodierer，System und Verfahren zur Codierung und Decodierung

    公开(公告)号：EP2980793A1

    公开(公告)日：2016-02-03

    申请号：EP14178780.4

    申请日：2014-07-28

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

    发明人： Fuchs, Guillaume ,  Schubert, Benjamin ,  Pietrzyk, Grzegorz ,  Multrus, Markus ,  Grill, Bernhard

    IPC分类号： G10L19/035 ,  H04N19/124

    CPC分类号： H04N19/126 ,  G10L19/035 ,  H04N19/13 ,  H04N19/184 ,  H04N19/44 ,  H04N19/70 ,  H04N19/91

    摘要： Embodiments of the present invention provide an encoder comprising a quantization stage, an entropy encoder, a residual quantization stage and a coded signal former. The quantization stage is configured to quantize an input signal using a dead zone in order to obtain a plurality of quantized values. The entropy encoder is configured to encode the plurality of quantized values using an entropy encoding scheme in order to obtain a plurality of entropy encoded values. The residual quantization stage is configured to quantize a residual signal caused by the quantization stage, wherein the residual quantization stage is configured to determine at least one quantized residual value in dependence on the dead zone of the quantization stage. The coded signal former is configured to form a coded signal from the plurality of entropy encoded values and the at least one quantized residual value.

    摘要翻译： 本发明的实施例提供一种编码器，包括量化级，熵编码器，残余量化级和编码信号形成器。 量化级被配置为使用死区对输入信号进行量化，以获得多个量化值。 熵编码器被配置为使用熵编码方案对多个量化值进行编码，以便获得多个熵编码值。 剩余量化级被配置为量化由量化级引起的残留信号，其中残留量化级被配置为根据量化级的死区来确定至少一个量化剩余值。 编码信号形成器被配置为从多个熵编码值和至少一个量化剩余值形成编码信号。

    Watermark signal provision and watermark embedding
    9.
    发明公开
    Watermark signal provision and watermark embedding 审中-公开
    Wasserzeichensignalversorger und Wasserzeicheneinbettung

    公开(公告)号：EP2362385A1

    公开(公告)日：2011-08-31

    申请号：EP10154956.6

    申请日：2010-02-26

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

    发明人： Wabnik, Stefan ,  Grill, Bernhard ,  Eberlein, Ernst ,  Del Galdo, Giovanni ,  Krägeloh, Stefan ,  Zitzmann, Reinhard ,  Bliem, Tobias ,  Borsum, Juliane ,  Breiling, Marco ,  Pickel, Jörg ,  Greevenbosch, Bert

    IPC分类号： G10L19/00

    CPC分类号： G10L19/018 ,  H04H20/14 ,  H04H60/29 ,  H04H60/33

    摘要： A watermark signal provider (2400) for providing a watermark signal (2440) suitable for being hidden in an audio signal (2430) when the watermark signal is added to the audio signal, such that the watermark signal represents watermark data (2450), is described. The watermark signal provider comprises a psychoacoustical processor (2410) for determining a masking threshold of the audio signal; and a modulator (2420) for generating the watermark signal from a superposition of sample-shaping functions spaced apart from each other at a sample time interval (T b ) of a time-discrete representation of the watermark data, each sample-shaping function being amplitude-weighted with a respective sample of the time-discrete representation, multiplied by a respective amplitude weight depending on the masking threshold, the modulator being configured such that the sample time interval is shorter than a time extension of the sample-shaping functions; and the respective amplitude weight also depends on samples of the time-discrete representation neighboring the respective sample in time.

    摘要翻译： 一种水印信号提供器（2400），用于当将水印信号添加到音频信号时提供适于隐藏在音频信号（2430）中的水印信号（2440），使得水印信号表示水印数据（2450），是 描述。 水印信号提供器包括用于确定音频信号的掩蔽阈值的心理声学处理器（2410） 以及调制器（2420），用于在水印数据的时间离散表示的采样时间间隔（T b）处从彼此间隔开的采样整形功能的叠加产生水印信号，每个采样整形功能是 用时间离散表示的相应样本进行幅度加权，乘以相应的根据掩蔽阈值的幅度权重，调制器被配置为使得采样时间间隔短于样本整形函数的时间延长; 并且相应的振幅权重也取决于在时间上与相应样本相邻的时间离散表示的样本。

    Watermark decoder and method for providing binary message data
    10.
    发明公开
    Watermark decoder and method for providing binary message data 审中-公开
    Wasserzeichendecodierer und Verfahren zur BereitstellungbinärerBenachrichtigungsdaten

    公开(公告)号：EP2362383A1

    公开(公告)日：2011-08-31

    申请号：EP10154951.7

    申请日：2010-02-26

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

    发明人： Wabnik, Stefan ,  Grill, Bernhard ,  Eberlein, Ernst ,  del Galdo, Giovanni ,  Krägeloh, Stefan ,  Zitzmann, Reinhard ,  Bliem, Tobias ,  Borsum, Juliane ,  Breiling, Marco ,  Pickel, Jörg ,  Greevenbosch, Bert

    IPC分类号： G10L19/00

    CPC分类号： G10L19/018

    摘要： A watermark decoder comprises a time-frequency-domain representation provider, a memory unit, a synchronization determiner and a watermark extractor. The time-frequency-domain representation provider provides a frequency-domain representation of the watermarked signal for a plurality of time blocks. The memory unit stores the frequency-domain representation of the watermarked signal for a plurality of time blocks. Further, the synchronization determiner identifies an alignment time block based on the frequency-domain representation of the watermarked signal of a plurality of time blocks. The watermark extractor provides binary message data based on stored frequency-domain representations of the watermarked signal of time blocks temporally preceding the identified alignment time block considering a distance to the identified alignment time block.

    摘要翻译： 水印解码器包括时域表示提供者，存储单元，同步确定器和水印提取器。 时域表示提供者为多个时间块提供水印信号的频域表示。 存储单元存储多个时间块的水印信号的频域表示。 此外，同步确定器基于多个时间块的水印信号的频域表示来识别对准时间块。 考虑到到所识别的对准时间块的距离，水印提取器基于时间上在所识别的对准时间块之前的时间块的水印信号的存储频域表示来提供二进制消息数据。