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公开(公告)号：EP4325724A3
公开(公告)日：2024-04-17
申请号：EP23210959.5
申请日：2007-10-23
发明人： Schnell, Markus , Lutzky, Manfred , Lohwasser, Markus , Schmidt, Markus , Gayer, Marc , Mellar, Michael , Edler, Bernd , Multrus, Markus , Schuller, Gerald , Geiger, Ralf , Grill, Bernhard
IPC分类号： G10L19/02 , G10L19/022 , G10L25/45 , H03H17/02 , G10L21/038
CPC分类号： G10L19/022 , H03H17/0266 , G10L21/038 , G10L25/45 , G10L19/0204
摘要： An embodiment of an apparatus (100) for generating audio subband values in audio subband channels comprises an analysis windower (110) for windowing a frame (120) of time-domain audio input samples being in a time sequence extending from an early sample to a later sample using an analysis window function (190) comprising a sequence of window coefficients to obtain windowed samples. The analysis window function (190) comprises a first group (200) of window coefficients and a second group (210) of window coefficients. The first group (200) of window coefficients is used for windowing later time-domain samples and the second group (210) of window coefficients is used for windowing an earlier time-domain samples. The apparatus (100) further comprises a calculator (170) for calculating the audio subband values using the windowed samples.
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公开(公告)号：EP4300825A3
公开(公告)日：2024-03-20
申请号：EP23210978.5
申请日：2007-10-23
发明人： Schnell, Markus , Lutzky, Manfred , Lohwasser, Markus , Schmidt, Markus , Gayer, Marc , Mellar, Michael , Edler, Bernd , Multrus, Markus , Schuller, Gerald , Geiger, Ralf , Grill, Bernhard
IPC分类号： G10L19/02 , G10L19/022 , G10L25/45 , H03H17/02 , G10L21/038
摘要： An embodiment of an apparatus (100) for generating audio subband values in audio subband channels comprises an analysis windower (110) for windowing a frame (120) of time-domain audio input samples being in a time sequence extending from an early sample to a later sample using an analysis window function (190) comprising a sequence of window coefficients to obtain windowed samples. The analysis window function (190) comprises a first group (200) of window coefficients and a second group (210) of window coefficients. The first group (200) of window coefficients is used for windowing later time-domain samples and the second group (210) of window coefficients is used for windowing an earlier time-domain samples. The apparatus (100) further comprises a calculator (170) for calculating the audio subband values using the windowed samples.
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公开(公告)号：EP4300824A3
公开(公告)日：2024-03-20
申请号：EP23210953.8
申请日：2007-10-23
发明人： Schnell, Markus , Lutzky, Manfred , Lohwasser, Markus , Schmidt, Markus , Gayer, Marc , Mellar, Michael , Edler, Bernd , Multrus, Markus , Schuller, Gerald , Geiger, Ralf , Grill, Bernhard
IPC分类号： G10L19/02 , G10L19/022 , G10L25/45 , H03H17/02 , G10L21/038
摘要： An apparatus for generating time-domain audio samples or synthesis filterbank (300) comprises a calculator (310) for calculating a frame (330) comprising a sequence of intermediate time-domain samples from audio subband values of block (320). The calculator (310) is coupled to a synthesis windower (360) to which the frame (330) of intermediate time-domain samples is provided. The synthesis windower (360) is adapted to windowing the sequence of intermediate time-domain samples using a synthesis window function (370) and provides a frame (380) of windowed intermediate time-domain samples. The synthesis windower (360) is coupled to an overlap-adder output stage (400) that obtains a block (410) of time-domain samples. The block (410) of the time-domain (output) samples can then for instance be provided to further components for further processing, storing or transforming into audible audio signals.
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公开(公告)号：EP4325724A2
公开(公告)日：2024-02-21
申请号：EP23210959.5
申请日：2007-10-23
发明人： Schnell, Markus , Lutzky, Manfred , Lohwasser, Markus , Schmidt, Markus , Gayer, Marc , Mellar, Michael , Edler, Bernd , Multrus, Markus , Schuller, Gerald , Geiger, Ralf , Grill, Bernhard
IPC分类号： H03H17/02
摘要： An embodiment of an apparatus (100) for generating audio subband values in audio subband channels comprises an analysis windower (110) for windowing a frame (120) of time-domain audio input samples being in a time sequence extending from an early sample to a later sample using an analysis window function (190) comprising a sequence of window coefficients to obtain windowed samples. The analysis window function (190) comprises a first group (200) of window coefficients and a second group (210) of window coefficients. The first group (200) of window coefficients is used for windowing later time-domain samples and the second group (210) of window coefficients is used for windowing an earlier time-domain samples. The apparatus (100) further comprises a calculator (170) for calculating the audio subband values using the windowed samples.
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公开(公告)号：EP3671736A1
公开(公告)日：2020-06-24
申请号：EP20155702.2
申请日：2009-10-06
发明人： Fuchs, Guillaume , Multrus, Markus , Geiger, Ralf , Borsum, Arne , Nagel, Frederik , Robillard, Julien , Subbaraman, Vignesh , Lecomte, Jérémie
摘要： An audio decoder for providing a decoded audio information on the basis of an entropy encoded audio information comprises a context-based entropy decoder configured to decode the entropy-encoded audio information in dependence on a context, which context is based on a previously-decoded audio information in a non-reset state-of-operation. The context-based entropy decoder is configured to select a mapping information, for deriving the decoded audio information from the encoded audio information, in dependence on the context. The context-based entropy decoder comprises a context resetter configured to reset the context for selecting the mapping information to a default context, which default context is independent from the previously-decoded audio information, in response to a side information of the encoded audio information.
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公开(公告)号：EP2410520B1
公开(公告)日：2019-06-26
申请号：EP11180988.5
申请日：2009-07-06
发明人： Bayer, Stefan , Disch, Sascha , Geiger, Ralf , Neuendorf, Max , Schuller, Gerald , Fuchs, Guillaume , Edler, Bernd
IPC分类号： G10L19/022 , G10L19/025 , G10L25/78
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7.发明公开Apparatus and method for decoding an encoded audio signal using a cross-over filter around a transition frequency 审中-公开的装置和方法使用重叠滤波器的过渡频率解码编码的音频信号
公开(公告)号：EP2830065A1
公开(公告)日：2015-01-28
申请号：EP13189389.3
申请日：2013-10-18
发明人： Disch, Sascha , Geiger, Ralf , Helmrich, Christian , Nagel, Frederik , Neukam christian , Schmidt, Konstantin , Fischer, Michael
IPC分类号： G10L21/0388 , G10L19/028 , G10L19/02
CPC分类号： G10L19/008 , G10L19/02 , G10L19/0204 , G10L19/0208 , G10L19/0212 , G10L19/022 , G10L19/025 , G10L19/03 , G10L19/032 , G10L19/06 , G10L21/0388 , G10L25/06 , H04S1/007
摘要： Apparatus for decoding an encoded audio signal comprising an encoded core signal (1), comprising: a core decoder (1400) for decoding the encoded core signal (1401) to obtain a decoded core signal; a tile generator (1404) for generating one or more spectral tiles having frequencies not included in the decoded core signal using a spectral portion of the decoded core signal; and a cross-over filter (1406) for spectrally cross-over filtering the decoded core signal and a first frequency tile having frequencies extending from a gap filling frequency (309) to an upper border frequency or for spectrally cross-over filtering a first frequency tile and a second frequency tile.
摘要翻译： 一种用于包括编码信号的核心的编码音频信号的解码（1），包括：用于对编码核心信号（1401），以获得经解码的核心信号进行解码的核心解码器（1400）; 图块生成器（1404），用于产生具有不包括在核心使用解码核心信号的频谱部分的解码信号的频率的一个或多个光谱的瓷砖; 和交叉过滤器（1406）用于光谱交叉滤波解码核心信号和具有频率从间隙延伸的上边界频率或用于光谱交叉滤波的第一频率填充频率（309）到第一频率瓦片 瓦片和第二频率块。
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8.发明公开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Audiosignalcodierer，Verfahren zur Erzeugung eines Audiosignals und Computerprogramm
公开(公告)号：EP2410521A1
公开(公告)日：2012-01-25
申请号：EP11180989.3
申请日：2009-07-06
发明人： Bayer, Stefan , Disch, Sasch , Geiger, Ralf , Neuendorf, Max , Schuller, Gerald , Fuchs, Guillaume , Edler, Bernd
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。
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9.发明公开Audio decoder, audio encoder, methods for decoding and encoding an audio signal and computer program 有权Audiodekodierer，Verfahren zum Dekodieren eines Audiosignals und Computerprogramm
公开(公告)号：EP2214164A2
公开(公告)日：2010-08-04
申请号：EP10152001.3
申请日：2010-01-28
发明人： Neuendorf, Max , Lecomte, Jérémie , Multrus, Markus , Bayer, Stefan , Nagel, Frederik , Fuchs, Guillaume , Robilliard, Julien , Rettelbach, Nikolaus , Geiger, Ralf , Grill, Bernhard
CPC分类号： G10L19/022 , G10L19/20
摘要： An audio decoder for providing a decoded representation of an audio content on the basis of an encoded representation of the audio content comprises a linear-prediction-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of linear-prediction domain parameters associated with the audio frame and a frequency-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of frequency-domain parameters, taking into account a transform window out of a set comprising a plurality of different transform windows. The audio decoder comprises a signal combiner configured to overlap-and-add-time-domain representations of subsequent audio frames encoded in different domains, in order to smoothen a transition between the time-domain representations of the subsequent frames. The set of transform windows comprises one or more windows specifically adapted for a transition between a frequency-domain core mode and a linear-prediction-domain core mode.
摘要翻译： 一种音频解码器，用于基于音频内容的经编码的表示来提供音频内容的解码表示，包括：线性预测域解码器核心，被配置为基于设置提供音频帧的时域表示 与所述音频帧相关联的线性预测域参数以及被配置为基于一组频域参数提供音频帧的时域表示的频域解码器核心，考虑到从 一组包括多个不同的变换窗口。 音频解码器包括信号组合器，其被配置为对在不同域中编码的后续音频帧进行重叠和加时域表示，以平滑后续帧的时域表示之间的转换。 变换窗口集合包括一个或多个窗口，其特别适用于频域核心模式和线性预测域核心模式之间的转换。
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10.发明公开Apparatus and method for generating audio subband values and apparatus and method for generating time-domain audio samples 审中-公开装置和方法，用于产生音频子带值和的装置和方法用于产生时域音频采样
公开(公告)号：EP2109098A2
公开(公告)日：2009-10-14
申请号：EP09010010.8
申请日：2007-10-23
发明人： Schnell, Markus , Lutzky, Manfred , Lohwasser, Markus , Schmidt, Markus , Gayer, Marc , Mellar, Michael , Edler, Bernd , Multrus, Markus , Schuller, Gerald , Geiger, Ralf , Grill, Bernhard
摘要： An embodiment of an apparatus (100) for generating audio subband values in audio subband channels comprises an analysis windower (110) for windowing a frame (120) of time-domain audio input samples being in a time sequence extending from an early sample to a later sample using an analysis window function (190) comprising a sequence of window coefficients to obtain windowed samples. The analysis window function (190) comprises a first group (200) of window coefficients and a second group (210) of window coefficients. The first group (200) of window coefficients is used for windowing later time-domain samples and the second group (210) of window coefficients is used for windowing an earlier time-domain samples. The apparatus (100) further comprises a calculator (170) for calculating the audio subband values using the windowed samples.
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