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1. 发明授权

US11804232B2 Resampling output signals of QMF based audio codecs 有权
公开(公告)号：US11804232B2
公开(公告)日：2023-10-31
申请号：US17172335
申请日：2021-02-10
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Markus Lohwasser , Manuel Jander , Max Neuendorf , Ralf Geiger , Markus Schnell , Matthias Hildenbrand , Tobias Chalupka
IPC分类号： G10L19/24 , G10L19/16 , G10L19/008 , G10L19/02 , G10L19/26 , H03H17/02 , H03H17/06
CPC分类号： G10L19/24 , G10L19/008 , G10L19/0204 , G10L19/16 , G10L19/26 , H03H17/0211 , H03H17/0272 , H03H17/0621 , G10L19/02 , H03H17/0294
摘要： An apparatus for processing an audio signal includes a configurable first audio signal processor for processing the audio signal in accordance with different configuration settings to obtain a processed audio signal, wherein the apparatus is adapted so that different configuration settings result in different sampling rates of the processed audio signal. The apparatus furthermore includes n analysis filter bank having a first number of analysis filter bank channels, a synthesis filter bank having a second number of synthesis filter bank channels, a second audio processor being adapted to receive and process an audio signal having a predetermined sampling rate, and a controller for controlling the first number of analysis filter bank channels or the second number of synthesis filter bank channels in accordance with a configuration setting.

2. 发明授权

US09940943B2 Resampling of an audio signal interrupted with a variable sampling frequency according to the frame 有权
公开(公告)号：US09940943B2
公开(公告)日：2018-04-10
申请号：US15106684
申请日：2014-12-11
申请人： Orange
发明人： Stephane Ragot , Jerome Daniel , Balazs Kovesi
IPC分类号： G10L19/24 , H03H17/06 , G10L19/02 , G10L19/022
CPC分类号： G10L19/24 , G10L19/0204 , G10L19/022 , H03H17/0621 , H03H2218/14
摘要： A method for resampling an audio-frequency signal with an output sampling frequency, for a current signal frame. The method is used when the preceding frame is sampled at a first sampling frequency which is different from a second sampling frequency of the current frame. The method includes: determining a first and second segments of the signal by adding samples at zero at the end of stored samples of the preceding frame and at the start of samples of the current frame, respectively; obtaining the first resampled segment and the second resampled segment by applying at least one resampling filter respectively to the first segment resampling the first frequency at the output frequency, and to the second segment resampling the second frequency at the output frequency; and combining the overlapping portion of the first and second resampled segments to obtain at least one portion of the resampled current frame.

3. 发明申请

US20180025686A1 METHOD AND DEVICE FOR EMULATING CONTINUOUSLY VARYING FRAME RATES 审中-公开
公开(公告)号：US20180025686A1
公开(公告)日：2018-01-25
申请号：US15550222
申请日：2016-02-11
申请人： MAX-PANCK-GESELLSCHAFT ZUR FÖRDERUNG DER WISSENSCHAFTEN E.V. , UNIVERSITÄT DES SAARLANDES
发明人： Krzysztof TEMPLIN , Karol MYSZKOWSKI , Hans-Peter SEIDEL , Piotr DIDYK
IPC分类号： G09G3/20 , G06T3/40 , H04N5/262 , H04N21/4402 , H04N7/01 , H04N5/235
CPC分类号： G09G3/2092 , G06T3/4007 , G06T2207/10016 , G06T2207/10144 , G06T2207/20201 , G09G3/20 , G09G2320/0247 , G09G2340/0435 , H03H17/0621 , H03H17/0685 , H04N5/2353 , H04N5/262 , H04N5/2625 , H04N7/0127 , H04N7/0135 , H04N21/440245 , H04N21/440281
摘要： The present invention relates to a method and a device for emulating frame rates in video or motion picture.

4. 发明申请

US20170250676A1 AUDIO PROCESSING WITH MODIFIED CONVOLUTION 审中-公开
公开(公告)号：US20170250676A1
公开(公告)日：2017-08-31
申请号：US15514488
申请日：2015-09-26
申请人： Lachlan BARRATT
发明人： Lachlan BARRATT
IPC分类号： H03H17/06 , H03H17/02
CPC分类号： H03H17/0621 , H03H17/0248 , H03H17/06 , H03H17/0657
摘要： A method of processing a digital signal includes providing a digital filter including neighbouring sample points and performing a sample rate increase on the digital filter to provide intermediate sample points between adjacent neighbouring sample points, said intermediate points being populated dependent on a weighted influence determined in the time domain of a predetermined number of the neighbouring sample points. The digital filter is applied to the signal where: i) one of the neighbouring sample points of the filter is applied to a corresponding sample point of the signal; ii) offset and neighbouring sample points of the signal are defined either side of the corresponding sample point, said offset points being offset in the time domain relative to the respective neighbouring sample points of the filter; and iii) the neighbouring sample points of the filter are applied to respective of the offset and neighbouring sample points of the signal.

5. 发明授权

US09069689B2 Downsampling with partial-sum re-use 有权
标题翻译：使用部分和重用进行下采样
公开(公告)号：US09069689B2
公开(公告)日：2015-06-30
申请号：US13489605
申请日：2012-06-06
申请人： Boris Lerner , Gopal Gudhur Karanam
发明人： Boris Lerner , Gopal Gudhur Karanam
IPC分类号： H03H17/06 , H03H17/02 , G06F17/10
CPC分类号： G06F17/10 , H03H17/026 , H03H17/0621
摘要： The sampling rate of a digital signal is reduced by storing a series of partial sums of the digital signal instead of the signal itself, thus reducing the memory size required to perform the sampling-rate reduction.
摘要翻译：通过存储一系列数字信号的部分和而不是信号本身来减少数字信号的采样率，从而减少了执行采样速率降低所需的存储器大小。

6. 发明授权

US08650236B1 High-rate interpolation or decimation filter in integrated circuit device 有权
标题翻译：集成电路设备中的高速内插或抽取滤波器
公开(公告)号：US08650236B1
公开(公告)日：2014-02-11
申请号：US12535133
申请日：2009-08-04
申请人： Shin-I Chou
发明人： Shin-I Chou
IPC分类号： G06F17/17 , G06F17/10
CPC分类号： H03H17/0621 , H03H17/0275 , H03H2017/0247 , H03H2017/0298
摘要： On a device having a maximum data rate, an interpolation filter can be configured in stages, with each stage may be broken into subfilters, which divides the output into phases. The ratio of the number of subfilters or phases in the final stage to the number of subfilters or phases in the initial stage is equal to the factor by which the data rate would otherwise increase. Thus for an interpolation factor of M, the output data rate can be kept the same as the input data rate by providing M subfilters, yielding M output phases each having an output rate equal to the input rate. The effective, or synthesized, output rate is M times the input rate. A decimation filter can be provided in the same way, with the effective input rate M times the output rate, even where the effective input rate would exceed the maximum data rate.
摘要翻译：在具有最大数据速率的设备上，可以分阶段地配置内插滤波器，其中每个级可以被分成子滤波器，其将输出分为相。最后阶段的子过滤器或相位的数量与初始阶段中的子过滤器或相位的数量之比等于数据速率否则会增加的因素。因此，对于M的内插因子，通过提供M个子滤波器，输出数据速率可以保持与输入数据速率相同，产生每个具有等于输入速率的输出速率的M个输出相位。有效或合成的输出速率是输入速率的M倍。即使在有效输入速率超过最大数据速率的情况下，可以以相同的方式提供抽取滤波器，有效输入速率为输出速率的M倍。

7. 发明申请

US20130151262A1 RESAMPLING OUTPUT SIGNALS OF QMF BASED AUDIO CODECS 有权
标题翻译：基于QMF的音频编解码器的输出信号
公开(公告)号：US20130151262A1
公开(公告)日：2013-06-13
申请号：US13762614
申请日：2013-02-08
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Markus Lohwasser , Manuel Jander , Max Neuendorf , Ralf Geiger , Markus Schnell , Matthias Hildenbrand , Tobias Chalupka
IPC分类号： G10L19/008
CPC分类号： G10L19/24 , G10L19/008 , G10L19/02 , G10L19/0204 , G10L19/16 , G10L19/26 , H03H17/0211 , H03H17/0272 , H03H17/0294 , H03H17/0621
摘要： An apparatus for processing an audio signal includes a configurable first audio signal processor for processing the audio signal in accordance with different configuration settings to obtain a processed audio signal, wherein the apparatus is adapted so that different configuration settings result in different sampling rates of the processed audio signal. The apparatus furthermore includes an analysis filter bank having a first number of analysis filter bank channels, a synthesis filter bank having a second number of synthesis filter bank channels, a second audio processor being adapted to receive and process an audio signal having a predetermined sampling rate, and a controller for controlling the first number of analysis filter bank channels or the second number of synthesis filter bank channels in accordance with a configuration setting.
摘要翻译：一种用于处理音频信号的装置包括可配置的第一音频信号处理器，用于根据不同的配置设置处理音频信号以获得经处理的音频信号，其中该装置适于使得不同的配置设置导致处理的音频信号。该装置还包括具有第一数量的分析滤波器组通道的分析滤波器组，具有第二数量的合成滤波器组通道的合成滤波器组，适于接收和处理具有预定采样率的音频信号的第二音频处理器以及控制器，用于根据配置设置来控制第一数量的分析滤波器组信道或第二数量的合成滤波器组信道。

8. 发明授权

US08380772B2 Multi-rate filter bank 失效
标题翻译：多速率滤波器组
公开(公告)号：US08380772B2
公开(公告)日：2013-02-19
申请号：US12637771
申请日：2009-12-15
申请人： Kung-Piao Huang
发明人： Kung-Piao Huang
IPC分类号： G06F17/10
CPC分类号： H03H17/0294 , H03H17/0223 , H03H17/0621 , H03H2218/085
摘要： A multi-rate filter bank including an anti-aliasing filter, a plurality of multiplier block modules, a folding block, and a data composer is disclosed. The anti-aliasing filter receives an anti-aliasing input signal. The multiplier block modules receive an original signal and sequentially generate a plurality of processed signals. The multiplier block modules also receive a plurality of block input signals and a select signal. Each of the multiplier block modules is configured into a decimation block or an expanding anti-aliasing filter according to the select signal. The folding block receives the select signal and a folding input signal and generates a folding block output signal. The data composer receives and composes the folding block output signal and the outputs of the multiplexer block modules and the anti-aliasing filter and generates an anti-aliasing filter output signal.
摘要翻译：公开了一种包括抗混叠滤波器，多个乘法器模块，折叠块和数据编辑器的多速率滤波器组。抗混叠滤波器接收抗混叠输入信号。乘法器模块模块接收原始信号并顺序产生多个处理的信号。乘法器模块还接收多个块输入信号和选择信号。每个乘法器块模块根据选择信号配置成抽取块或扩展抗混叠滤波器。折叠块接收选择信号和折叠输入信号，并产生折叠块输出信号。数据编辑器接收和组合折叠块输出信号和多路复用器模块和抗混叠滤波器的输出，并产生抗混叠滤波器输出信号。

9. 发明申请

US20100008654A1 Digital signal conversion system and method, and computer-readable recording medium thereof 审中-公开
标题翻译：数字信号转换系统及方法及其计算机可读记录介质
公开(公告)号：US20100008654A1
公开(公告)日：2010-01-14
申请号：US12385986
申请日：2009-04-27
申请人： Yueh-Teng Hsu
发明人： Yueh-Teng Hsu
IPC分类号： H04N7/01
CPC分类号： H03H17/0621 , G11B20/10037 , G11B20/10527 , G11B2020/10546 , G11B2020/10981 , H03H2017/0298
摘要： A digital signal conversion system and method, and a computer-readable recording medium thereof are adapted to perform sampling rate conversion on audio/video digital signals when a multimedia file is played by an electronic device. The digital signal conversion system includes a reading process, a conversion process and a storage process. First, a digital signal data is read by the reading process. Next, a corresponding number of copies are replicated for each bit of the digital signal data according to a digital signal sampling conversion ratio recorded in a sampling rate conversion sequence, so as to convert the sampling of the digital signal data and store the replicated digital signal data into a memory.
摘要翻译：数字信号转换系统和方法及其计算机可读记录介质适用于当电子设备播放多媒体文件时对音频/视频数字信号执行采样率转换。数字信号转换系统包括读取过程，转换过程和存储过程。首先，通过读取处理读取数字信号数据。接下来，根据记录在采样率转换序列中的数字信号采样转换比，对数字信号数据的每一位复制相应数量的拷贝，以便转换数字信号数据的采样并存储复制的数字信号数据进入内存

10. 发明授权

US07626721B2 Dither methods for suppression of data-dependent activity variations 有权
标题翻译：用于抑制数据依赖性活动变化的抖动方法
公开(公告)号：US07626721B2
公开(公告)日：2009-12-01
申请号：US11546791
申请日：2006-10-12
申请人： George S. Moore , Frank Van de Sande
发明人： George S. Moore , Frank Van de Sande
IPC分类号： G06K1/00 , G06K15/02 , G06F15/00
CPC分类号： H03H17/0621 , H03H17/0219
摘要： A system and method are provided for minimizing data-dependent power variations. The system and method can include summing an input with a dither signal, processing the summed signal, and substantially removing the effects of the dither signal from the output. The output is an approximation of processing to the input alone, while certain aspects of processing activity, such as temperature changes and current draw, are less dependent on input values. Variations in data-dependent activities are thus reduced. The effects of the dither signal may be removed by equivalently processing the dither signal alone, and using that result as a compensating signal to cancel components of the processed signal that result from the presence of the dither signal.
摘要翻译：提供了一种用于最小化依赖于数据的功率变化的系统和方法。该系统和方法可以包括将输入与抖动信号相加，处理相加的信号，以及基本上去除抖动信号对输出的影响。输出是对输入单独处理的近似值，而处理活动的某些方面（如温度变化和电流消耗）较少依赖于输入值。因此，数据依赖活动的变化减少了。可以通过等效地处理抖动信号来消除抖动信号的影响，并且使用该结果作为补偿信号来消除由抖动信号的存在引起的处理信号的分量。

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