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    • 41. 发明公开
    • Apparatus and method for efficient synthesis of sinusoids and sweeps by employing spectral patterns
    • 设备和方法,用于Sinosoiden和扫描的有效合成通过使用频谱图案
    • EP2720222A1
    • 2014-04-16
    • EP12199266.3
    • 2012-12-21
    • Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Friedrich-Alexander-Universität Erlangen-Nürnberg
    • Disch, SaschaSschubert, BenjaminGeiger, RalfEdler, BerndDietz, Martin
    • G10L19/02
    • G10L19/02G10L19/0212G10L19/032
    • An apparatus for generating an audio output signal based on an encoded audio signal spectrum is provided. The apparatus comprises a processing unit (115) for processing the encoded audio signal spectrum to obtain a decoded audio signal spectrum comprising a plurality of spectral coefficients, wherein each of the spectral coefficients has a spectral location within the encoded audio signal spectrum and a spectral value, wherein the spectral coefficients are sequentially ordered according to their spectral location within the encoded audio signal spectrum so that the spectral coefficients form a sequence of spectral coefficients. Moreover, the apparatus comprises a pseudo coefficients determiner (125) for determining one or more pseudo coefficients of the decoded audio signal spectrum, each of the pseudo coefficients having a spectral value. Furthermore, the apparatus comprises a replacement unit (135) for replacing at least one or more pseudo coefficients by a determined spectral pattern to obtain a modified audio signal spectrum, wherein the determined spectral pattern comprises at least two pattern coefficients, wherein each of the at least two pattern coefficients has a spectral value. Moreover, the apparatus comprises a spectrum-time-conversion unit (145) for converting the modified audio signal spectrum to a time-domain to obtain the audio output signal.
    • 提供了一种用于在在编码的音频信号的频谱基于音频输出信号产生的装置。 该装置包括一个处理单元(115),用于处理经编码的音频信号的频谱,以获得解码音频信号的频谱,其包括频谱系数的多元worin每个频谱系数的具有经编码的音频信号频谱中的频谱位置和频谱值 ,worin频谱系数被顺序排列gemäß到他们的频谱位置中的编码的音频信号的频谱内所以做了频谱系数形成的频谱系数的序列。 更上方,该装置包括一个伪系数确定器(125),用于确定的采矿一个或解码的音频信号的频谱的多个伪系数,每一个具有一个频谱值伪系数。 进一步,该装置包括一个替换单元(135),用于通过确定性开采频谱图案替换至少一个或多个伪系数以获得经修改的音频信号的频谱,worin确定性开采频谱图案包括至少两个图案系数在worin每个 至少两个图案系数具有光谱值。 更上方,该装置包括一个频谱 - 时间变换单元(145)为修正的音频信号的频谱转换到时域,以获得所述音频输出信号。