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1. 发明申请

US20090287479A1 SOUND FRAME LENGTH ADAPTATION 审中-公开
标题翻译：声音长度适应
公开(公告)号：US20090287479A1
公开(公告)日：2009-11-19
申请号：US12306618
申请日：2007-06-27
申请人： Marek Szczerba , Andreas Gerrits , Marc Klein Middelink
发明人： Marek Szczerba , Andreas Gerrits , Marc Klein Middelink
IPC分类号： G10L19/02 , G10L21/00
CPC分类号： G10L19/022
摘要： A method of producing time domain sound data (B) from sound parameters (A), the method comprising the steps of: forming first frames, each first frame containing sound parameters representing sound, —forming second frames from the first frames, each second frame containing transform domain sound data derived from the sound parameters, the transform domain sound data of each second frame representing sound having a specific time domain length, and each second frame having a length corresponding with an efficient inverse transform, inversely transforming the second frames into third frames (G1, G2, . . . ), each third frame containing time domain sound data corresponding to the transform domain sound data of a second frame, and each third frame having a length equal to a second frame, outputting substantially all time domain sound data (B) of each third frame, and discarding or repeating first frames (F3, F7) as necessary to compensate for any length difference between the said specific time domain length (P) and the length of the third frames (Q).
摘要翻译：一种从声音参数（A）产生时域声音数据（B）的方法，所述方法包括以下步骤：形成第一帧，每个第一帧包含表示声音的声音参数，来自第一帧的形成第二帧，每个第二帧包含从声音参数导出的变换域声音数据，每个第二帧的变换域声音数据表示具有特定时域长度的声音，并且每个第二帧具有与有效逆变换相对应的长度，将第二帧逆变换为第三帧帧（G1，G2 ...），每个第三帧包含对应于第二帧的变换域声音数据的时域声音数据，并且每个第三帧具有等于第二帧的长度，基本上输出所有时域声音每个第三帧的数据（B），并且根据需要丢弃或重复第一帧（F3，F7）以补偿所述特定时域长度（P）和第三帧（Q）的长度。

2. 发明申请

US20090281813A1 NOISE SYNTHESIS 审中-公开
标题翻译：噪音合成
公开(公告)号：US20090281813A1
公开(公告)日：2009-11-12
申请号：US12306611
申请日：2007-06-27
申请人： Andreas Gerrits , Marek Szczerba
发明人： Andreas Gerrits , Marek Szczerba
IPC分类号： G10L21/00
CPC分类号： G10L21/00
摘要： A device (1) for producing spectrally shaped noise comprises a filter unit (13) for filtering input noise samples using filter coefficients representing a spectral envelope. The filter coefficients are determined for use at a first sampling frequency, while the spectrally shaped noise is reproduced using the same filter coefficients at a second, different sampling frequency. The noise spectrum may further be altered by an upsampling unit (14).
摘要翻译：用于产生频谱成形噪声的装置（1）包括用于使用表示频谱包络的滤波器系数对输入噪声样本进行滤波的滤波器单元（13）。确定滤波器系数以在第一采样频率下使用，而使用相同滤波器系数以不同的采样频率再现频谱成形的噪声。可以通过上采样单元（14）进一步改变噪声频谱。

3. 发明申请

US20070112573A1 Sinusoid selection in audio encoding 审中-公开
标题翻译：音素编码中的正弦选择
公开(公告)号：US20070112573A1
公开(公告)日：2007-05-17
申请号：US10539318
申请日：2003-11-20
申请人： Andreas Gerrits , Albertus Den Brinker
发明人： Andreas Gerrits , Albertus Den Brinker
IPC分类号： G10L21/00 , G10L11/00
CPC分类号： G10L19/093
摘要： A method of encoding (1) an audio signal (x(t)) by representing (12) at least part of said audio signal by a plurality of sinusoids. The method comprising the steps of performing an analysis on a first segment of said audio signal, selecting candidate sinusoids based on said analysis, defining for at least one of the candidate sinusoids a local frequency band around said candidate sinusoid's frequency, combining amplitudes of frequency components within said local frequency band from which at least one of the candidate sinusoids within said local frequency band is excluded, and selecting said candidate sinusoid as a selected sinusoid in dependence on the combination of amplitudes. The selection of sinusoids according to the invention will result in a smaller number of sinusoids to be encoded for a given audio quality, which is advantageous in terms of hit-rate for a given audio quality.
摘要翻译：通过用多个正弦曲线表示（12）所述音频信号的至少一部分来对（1）音频信号（x（t））进行编码的方法。该方法包括以下步骤：对所述音频信号的第一段执行分析，基于所述分析选择候选正弦曲线，为所述候选正弦波中的至少一个定义所述候选正弦波频率周围的本地频带，组合频率分量的幅度在所述本地频带内，排除所述本地频带内的候选正弦波中的至少一个，并且根据振幅的组合将所述候选正弦波选择为选择的正弦波。根据本发明的正弦曲线的选择将导致对于给定的音频质量而要编码的较少数量的正弦曲线，这在给定音频质量的命中率方面是有利的。

4. 发明申请

US20070100639A1 Audio encoding 失效
标题翻译：音频编码
公开(公告)号：US20070100639A1
公开(公告)日：2007-05-03
申请号：US10575428
申请日：2004-10-04
申请人： Albertus Den Brinker , Andreas Gerrits
发明人： Albertus Den Brinker , Andreas Gerrits
IPC分类号： G10L21/00
CPC分类号： G10L19/032 , G10L19/093
摘要： Coding of an audio signal (x) represented by a respective set of sampled signal values (x(t)) for each of a plurality of sequential time segments is disclosed. The sampled signal values are analyzed to determine one or more sinusoidal components for each of the plurality of sequential segments. The sinusoidal components are linked across a plurality of sequential segments to provide sinusoidal tracks, where each track comprises a number of frames. An encoded signal (AS) is generated, including sinusoidal codes (Cs) comprising a representation level (r) for each frame or including sinusoidal codes (Cs) where some of these codes comprise a phase (φ), a frequency (ω) and a quantization table (Q) for a given frame when the given frame is designated as a random-access frame. The invention allows random access in a track while avoiding long adaptation of the quantization accuracy in a quantizer and/or the need for a large bit stream while still maintaining improved audio quality.
摘要翻译：公开了对于多个连续时间段中的每一个对由相应的一组采样信号值（x（t））表示的音频信号（x）的编码。分析采样的信号值以确定多个顺序段中的每一个的一个或多个正弦分量。正弦分量连接在多个顺序段上以提供正弦曲线，其中每个轨道包括多个帧。生成编码信号（AS），包括包括每帧的表示级（r）或包括正弦代码（C SUB）的正弦码（C SUB），其中一些的这些代码包括当给定帧被指定为随机接入帧时给定帧的相位（phi），频率（ω）和量化表（Q）。本发明允许在轨道中随机访问，同时避免量化器中的量化精度的长时间适应性和/或对大比特流的需要，同时仍然保持改善的音频质量。

5. 发明申请

US20060212501A1 Sinusoid selection in audio encoding 审中-公开
标题翻译：音素编码中的正弦选择
公开(公告)号：US20060212501A1
公开(公告)日：2006-09-21
申请号：US10539311
申请日：2003-11-19
申请人： Andreas Gerrits , Albertus Den Brinker
发明人： Andreas Gerrits , Albertus Den Brinker
IPC分类号： G06F17/10
CPC分类号： G10L19/093
摘要： A method of encoding (1) an audio signal (x(t)) by representing (12) at least part of the audio signal by a plurality of sinusoids, the method comprising the steps of performing an analysis on a first segment of said audio signal, selecting candidate sinusoids based on said analysis, determining for at least one of the candidate sinusoids a phase consistency defined by an extent to which a phase of said candidate sinusoid at a certain moment in time can be predicted from a phase of said candidate sinusoid determined at another moment in time, and selecting said candidate sinusoid as a selected sinusoid when its phase consistency is above a predetermined threshold. The selection of sinusoids according to the invention will result in a smaller number of sinusoids to be encoded for a given audio quality, which is advantageous in terms of bit-rate for a given audio quality.
摘要翻译：一种通过用多个正弦曲线表示（12）至少部分音频信号来对（1）音频信号（x（t））进行编码的方法，所述方法包括以下步骤：对所述音频的第一段进行分析信号，基于所述分析来选择候选正弦波，确定候选正弦曲线中的至少一个候选正弦曲线，其相位一致性定义在从所述候选正弦曲线的相位可以预测在某一特定时刻的所述候选正弦曲线的相位的程度在时间上的另一时刻确定，并且当其相位一致性高于预定阈值时，将所述候选正弦波选择为选择的正弦曲线。根据本发明的正弦曲线的选择将导致对于给定音频质量而要编码的较少数量的正弦曲线，这在给定音频质量的比特率方面是有利的。

6. 发明申请

US20070112560A1 Low bit-rate audio encoding 有权
标题翻译：低比特率音频编码
公开(公告)号：US20070112560A1
公开(公告)日：2007-05-17
申请号：US10564656
申请日：2004-07-08
申请人： Andreas Gerrits , Albertus Den Brinker
发明人： Andreas Gerrits , Albertus Den Brinker
IPC分类号： G10L19/14
CPC分类号： G10L19/093
摘要： In a sinusoidal audio encoder a number of sinusoids are estimated per audio segment. A sinusoid is represented y frequency, amplitude and phase. Normally, phase is quantised independent of frequency The invention uses a frequency dependent quantisation of phase, and in particular the low frequencies are quantised using smaller quantisation intervals than at higher frequencies. Thus, the unwrapped phases of the lower frequencies are quantised more accurately, possibly with a smaller quantisation range, than the phases of the higher frequencies. The invention gives a significant improvement in decoded signal quality, especially for low bit-rate quantisers
摘要翻译：在正弦音频编码器中，每个音频段估计出多个正弦波。正弦曲线表示y频率，振幅和相位。通常，相位与频率无关地量化本发明使用相位的频率相关量化，特别是使用比较高频率更小的量化间隔量化低频。因此，与较高频率的相位相比，更准确地量化更低频率的展开相位，可能具有较小的量化范围。本发明给出了解码信号质量的显着改进，特别是对于低比特率量化器

7. 发明申请

US20070027678A1 Low bit-rate audio encoding 失效
标题翻译：低比特率音频编码
公开(公告)号：US20070027678A1
公开(公告)日：2007-02-01
申请号：US10570289
申请日：2004-08-26
申请人： Gerard Hotho , Andreas Gerrits
发明人： Gerard Hotho , Andreas Gerrits
IPC分类号： G10L21/00
CPC分类号： G10L19/093
摘要： In a sinusoidal audio encoder a number of sinusoids are estimated per audio segment. A sinusoid is represented by frequency, amplitude and phase. The invention uses a track dependent quantizatin of phase. A track is encoded with a suitable initial (e.g. frequency dependent) quantization grid that is chosen among a set of possible initial grids that may vary from fine to coarse. If, in a series of time segments the frequency variation in a particular track is smaller than a predetermined value, the track is quantized using a finer quantization grid. The invention gives a significant improvement in decoded signal quality, especially for low bit-rate quantizers.
摘要翻译：在正弦音频编码器中，每个音频段估计出多个正弦波。正弦曲线由频率，振幅和相位表示。本发明使用轨道依赖的相位量化。轨道用适当的初始（例如频率相关）量化网格进行编码，该量化网格可以从一个可能的初始网格中选择，该组可以从精细到粗略地变化。如果在一系列时间段中，特定轨道中的频率变化小于预定值，则使用更精细的量化网格量化轨道。本发明在解码信号质量方面给出了显着的改进，特别是对于低比特率量化器。

8. 发明申请

US20060015328A1 Sinusoidal audio coding 审中-公开
标题翻译：正弦音频编码
公开(公告)号：US20060015328A1
公开(公告)日：2006-01-19
申请号：US10536241
申请日：2003-10-29
申请人： Nicolle Van Schijndel , Mireia Gomez Fuentes , Steven Leonardos Josephus Van De Par , Andreas Gerrits , Valery Kot
发明人： Nicolle Van Schijndel , Mireia Gomez Fuentes , Steven Leonardos Josephus Van De Par , Andreas Gerrits , Valery Kot
IPC分类号： G10L19/08
CPC分类号： G10L19/093 , G10L19/0208
摘要： Coding of an audio signal (x) represented by a respective set of sampled signal values for each of a plurality of sequential segments is disclosed. The sampled signal values are used to determine sinusoidal components (CS) for each of the plurality of sequential segments. The sinusoidal components (CS) are subtracted from the sampled signal values to provide a set of values (s1, s2) representing afirst residual component (x3) of the audio signal. The first residual component (x3) is conditioned (18) to remove selected tonal components and to provide a set of values (s1′, s2′) representing a second residual component (x3′) of the audio signal. The second residual component is modelled (14) by determining noise parameters (CN) approximating the second residual component (x3′); and an encoded audio stream (AS) is generated including the noise parameters (CN) and the codes representing the sinusoidal components (CS).
摘要翻译：公开了由多个连续段中的每一个的相应的一组采样信号值表示的音频信号（x）的编码。采样的信号值用于确定多个连续段中的每一个的正弦分量（CS）。从采样的信号值中减去正弦分量（CS），以提供表示音频信号的第一残差分量（x 3）的一组值（s 1，s 2）。对第一残余分量（x 3）进行调节（18）以去除所选择的音调分量，并提供表示音频信号的第二残余分量（x 3'）的一组值（s 1'，s 2'）。通过确定近似第二残余分量（x 3'）的噪声参数（CN）来对第二残差分量进行建模（14）。并且生成包括噪声参数（CN）和代表正弦分量（CS）的代码的编码音频流（AS）。

9. 发明申请

US20070185707A1 Audio coding 失效
标题翻译：音频编码
公开(公告)号：US20070185707A1
公开(公告)日：2007-08-09
申请号：US10598796
申请日：2005-03-08
申请人： Andreas Gerrits , Albertus Den Brinker
发明人： Andreas Gerrits , Albertus Den Brinker
IPC分类号： G10L19/00
CPC分类号： G10L19/20 , G10L19/022 , G10L19/093
摘要： The method creates an audio stream comprising tracks of sinusoidal components linked across a plurality of sequential time segments. Segments in each track are weighted with a normal window (WI, W2, W3), and consecutive segments have a normal period of overlap (0) of their trailing edges and leading edges. Segments in which a transient 5 component is determined are weighted with a first modified window (WIm) having a modified trailing edge, and the following segment in the track is weighted with a second modified window (W2m) having a modified leading edge, so that the modified trailing edge and the modified leading edge have a modified period of overlap (0m) that comprises the transient component and that is shorter than the normal period of overlap (0), and wherein the audio stream includes sinusoidal codes representing the frequency and the transient. According to the invention, the modified period of overlap (0m) depends on the frequency value (f).
摘要翻译：该方法创建包括跨多个连续时间段链接的正弦分量的轨道的音频流。每个轨道中的段用正常窗口（WI，W 2，W 3）加权，并且连续段具有其后沿和前沿的正常重叠周期（0）。确定瞬时5分量的分段用具有修改的后沿的第一修改窗口（WIm）加权，并且利用具有修改的前沿的第二修改窗口（W 2 m）对轨道中的后续段进行加权，使得修改的后沿和修改的前沿具有包括瞬态分量并且比正常的重叠周期（0）短的修改的重叠周期（0m），并且其中音频流包括代表频率和瞬态。根据本发明，修改的重叠周期（0m）取决于频率值（f）。

10. 发明申请

US20070106505A1 Audio coding 审中-公开
标题翻译：音频编码
公开(公告)号：US20070106505A1
公开(公告)日：2007-05-10
申请号：US10580676
申请日：2004-11-24
申请人： Andreas Gerrits , Albertus Den Brinker , Felip Riera Palou
发明人： Andreas Gerrits , Albertus Den Brinker , Felip Riera Palou
IPC分类号： G10L19/00
CPC分类号： G10L19/093 , G10L19/10 , G10L19/24
摘要： An audio coder is arranged to process a respective set of sampled signal values for each of a plurality of sequential segments of an audio signal (x). The coder comprises an analyser (TSA) arranged to analyse the sampled signal values to provide one or more sinusoidal codes (Cs) corresponding to respective sinusoidal components of the audio signal. A subtractor subtracts a signal corresponding to the sinusoidal components from the audio signal to provide a first residual signal (r1). A modeller (SEG) models the frequency spectrum of the first residual signal (r1) by determining first filter parameters (Ps) of a filter which has a frequency response approximating a frequency spectrum of the first residual signal. Another subtractor subtracts a signal corresponding to the first filter parameters from the first residual signal to provide a second residual signal (r2). Another modeller (RPE) models a component (r2,r3) of the second residual signal with a pulse train coder (RPE) to provide respective pulse train parameters (L0). A bit stream generator (15) generates an encoded audio stream (AS) including the sinusoidal codes (Cs), the first filter parameters (Ps) and the pulse train parameters (L0).
摘要翻译：音频编码器被布置成处理音频信号（x）的多个连续片段中的每一个的相应组的采样信号值。编码器包括分析器（TSA），其被布置为分析采样的信号值以提供对应于音频信号的各个正弦分量的一个或多个正弦码（Cs）。减法器从音频信号中减去对应于正弦分量的信号，以提供第一残差信号（r 1> 1）。模型（SEG）通过确定滤波器的第一滤波器参数（Ps）来确定第一残差信号（r 1> 1）的频谱，该滤波器的频率响应近似于第一残差信号的频谱。另一个减法器从第一残差信号中减去对应于第一滤波器参数的信号以提供第二残差信号（r 2> 2）。另一个建模器（RPE）用脉冲串编码器（RPE）对第二残差信号的分量（r 2 2，r 3 3）建模，以提供相应的脉冲序列参数（L 0 ）。比特流生成器（15）生成包括正弦码（Cs），第一滤波器参数（Ps）和脉冲序列参数（L 0> 0）的编码音频流（AS）。

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