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61. 发明公开

EP2410522A1 Time warp activation signal provider, audio signal encoder, method for providing a time warp activation signal, method for encoding an audio signal and computer programs 有权
标题翻译： Audiosignalcodierer，Verfahren zur Codierung eines Audiosignals und Computerprogramm
公开(公告)号：EP2410522A1
公开(公告)日：2012-01-25
申请号：EP11180990.1
申请日：2009-07-06
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Bayer, Stefan , Disch, Sascha , Geiger, Ralf , Neuendorf, Max , Schuller, Gerald , Fuchs, Guillaume , Edler, Bernd
IPC分类号： G10L19/00 , G10L21/04
CPC分类号： G10L21/04 , G10L19/002 , G10L19/0212 , G10L19/022 , G10L19/028 , G10L19/032 , G10L19/265 , G10L21/043 , G10L25/90
摘要： An audio encoder comprises a window function controller (504), a windower (502), a time warper (506) with a final quality check functionality, a time/frequency converter (508), a TNS stage (510) or a quantizer encoder (512), the window function controller (504), the time warper (506), the TNS stage (510) or an additional noise filling analyzer (524) are controlled by signal analysis results obtained by a time warp analyzer (516) or a signal classifier (520). Furthermore, a decoder applies a noise filling operation using a manipulated noise filling estimate depending on a harmonic or speech characteristic of the audio signal.
摘要翻译：音频编码器包括窗口功能控制器（504），加窗器（502），具有最终质量检查功能的时间整形器（506），时间/频率转换器（508），TNS级（510）或量化器编码器（512），窗口功能控制器（504），时间整形器（506），TNS级（510）或附加噪声填充分析器（524）由时间扭曲分析器（516）获得的信号分析结果或信号分类器（520）。此外，解码器使用根据音频信号的谐波或语音特性的操纵噪声填充估计来应用噪声填充操作。

62. 发明公开

EP2264699A2 Device and method for postprocessing spectral values and encoder and decoder for audio signals 有权
标题翻译：的装置和方法的频谱值的后处理和编码装置和解码装置的音频信号
公开(公告)号：EP2264699A2
公开(公告)日：2010-12-22
申请号：EP10173938.1
申请日：2007-09-28
申请人： Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V.
发明人： Geiger, Ralf , Edler, Bernd
IPC分类号： G10L19/14
CPC分类号： G10L19/26 , G10L19/0017 , G10L19/24 , G10L19/265
摘要： For postprocessing spectral values which are based on a first transformation algorithm for converting the audio signal into a spectral representation, first a sequence of blocks of the spectral values representing a sequence of blocks of samples of the audio signal are provided. Hereupon, a weighted addition of spectral values of the sequence of blocks of spectral values is performed in order to obtain a sequence of blocks of postprocessed spectral values, wherein the combination is performed such that for calculating a postprocessed spectral value for a frequency band and a time duration a spectral value of the sequence of blocks for the frequency band and the time duration and a spectral value for another frequency band or another time duration are used, wherein the combination is further performed such that such weighting factors are used that the postprocessed spectral values are an approximation to the spectral values as they are obtained by converting the audio signal into a spectral representation using a second transformation algorithm which is different from the first transformation algorithm. The postprocessed spectral values are in particular used for a difference formation within a scalable encoder or for an addition within a scalable decoder, respectively.
摘要翻译：用于后处理是基于哪个上的第一变换算法对音频信号转换成频谱表示，第一表示音频信号的样本的块的序列的频谱值的块的序列的频谱值被提供。于是，加权相加的频谱值的块的序列的频谱值的情况下进行，以获得后处理的频谱值的块的序列，worin用于的频带和一个计算后处理频谱值的组合进行搜索做持续时间被使用的块的序列的用于频带和所述持续时间和用于另一频率带或其他持续时间的频谱值的频谱值，worin组合进一步进行搜索没有被用于搜索的加权因子，DASS模具后处理的频谱值上近似频谱值，因为它们是通过使用第二变换算法所有这些是从第一变换算法不同的音频信号转换为频谱表示获得。的后处理的频谱值分别是在用于一个可伸缩的编码器内的差形成的特殊或在加入可伸缩解码器内。

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