公开(公告)号：US09519619B2

公开(公告)日：2016-12-13

申请号：US13938834

申请日：2013-07-10

申请人： Huawei Technologies Co., Ltd.

发明人： Deming Zhang ,  Haiting Li ,  Anisse Taleb ,  Jianfeng Xu

IPC分类号： G06F17/14

CPC分类号： G06F17/142 ,  G06F17/141 ,  G06F17/147 ,  G10L19/0212 ,  G10L19/022

摘要： A data processing method is disclosed, including: twiddling input data, so as to obtain twiddled data; pre-rotating the twiddled data by using a symmetric rotate factor, where the rotate factor is a·W4L2p+1, p=0, . . . , L/2−1, and a is a constant; performing a Fast Fourier (Fast Fourier Transform, FFT) transform of L/2 point on the pre-rotated data, where L is the length of the input data; post-rotating the data that has undergone the FFT transform by using a symmetric rotate factor, where the rotate factor is b·W4L2q+1, q=0, . . . , L/2−1, and b is a constant; and obtaining output data.

摘要翻译： 公开了一种数据处理方法，包括：对输入数据进行加密，以获得二进制数据; 通过使用对称的旋转因子预先旋转二进制数据，其中旋转因子为·W4L2p + 1，p = 0。 。 。 ，L / 2-1，a为常数; 在预旋转数据上执行L / 2点的快速傅里叶（Fast Fourier Transform，FFT）变换，其中L是输入数据的长度; 通过使用旋转因数为b·W4L2q + 1，q = 0的对称旋转因子对经过FFT变换的数据进行后转。 。 。 ，L / 2-1，b为常数; 并获得输出数据。

公开(公告)号：US09508355B2

公开(公告)日：2016-11-29

申请号：US14022806

申请日：2013-09-10

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Nam-suk Lee ,  Hyun-wook Kim ,  Han-gil Moon

IPC分类号： G10L19/022 ,  G10L25/45 ,  G10L19/02

CPC分类号： G10L19/022 ,  G10L19/0212 ,  G10L25/45

摘要： Exemplary embodiments may provide a method of encoding an audio signal. The method includes: segmenting the audio signal into a plurality of frames, wherein each of the frames includes M samples and M is a natural number greater than one; applying a first window, a second window, and at least one third window to the frames, wherein a length of the second window is longer than a length of the first window, and a length of the third window is longer than the length of the first window and shorter than the length of the second window; time-frequency transforming the frames to which the first window, the second window, and the at least one third window have been applied; and generating a bitstream including the time-frequency transformed frames.

摘要翻译： 示例性实施例可以提供对音频信号进行编码的方法。 该方法包括：将音频信号分割为多个帧，其中每个帧包括M个采样，M是大于1的自然数; 将第一窗口，第二窗口和至少一个第三窗口应用于所述框架，其中所述第二窗口的长度长于所述第一窗口的长度，并且所述第三窗口的长度长于所述第一窗口的长度 第一窗口并且比第二窗口的长度短; 对已应用第一窗口，第二窗口和至少一个第三窗口的帧进行时频变换; 以及生成包括所述时间 - 频率变换的帧的比特流。

公开(公告)号：US09502049B2

公开(公告)日：2016-11-22

申请号：US14538751

申请日：2014-11-11

申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

发明人： Stefan Bayer ,  Sascha Disch ,  Ralf Geiger ,  Guillaume Fuchs ,  Max Neuendorf ,  Gerald Schuller ,  Bernd Edler

IPC分类号： G10L19/00 ,  G10L21/04 ,  G10L19/002 ,  G10L19/028 ,  G10L19/022 ,  G10L19/032 ,  G10L21/043 ,  G10L25/90 ,  G10L19/26

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 has a window function controller, a windower, a time warper with a final quality check functionality, a time/frequency converter, a TNS stage or a quantizer encoder, the window function controller, the time warper, the TNS stage or an additional noise filling analyzer are controlled by signal analysis results obtained by a time warp analyzer or a signal classifier. 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.

公开(公告)号：US09484011B2

公开(公告)日：2016-11-01

申请号：US14045318

申请日：2013-10-03

申请人： Koplar Interactive Systems International, LLC

发明人： Pierre Moulin ,  Lilly Canel-Katz

IPC分类号： H04B3/20 ,  H04M9/08 ,  G10K15/08 ,  G10L19/022 ,  G10L21/0208

CPC分类号： G10K15/08 ,  G10L19/022 ,  G10L2021/02082 ,  H04M9/08 ,  H04M9/082

摘要： Methods and systems for echo modulation are described. In one embodiment, intensities of a plurality of values in multiple windows of an audio signal may be obtained. The windows may be subject to a periodic boundary condition. A plurality of echo values may be calculated for each of the respective windows. The audio signal may be altered in one or more of the windows using a windowing function and echo values. Additional methods and systems are disclosed.

摘要翻译： 描述了用于回波调制的方法和系统。 在一个实施例中，可以获得音频信号的多个窗口中的多个值的强度。 窗户可能会受到周期性边界条件的限制。 可以针对各个窗口计算多个回波值。 可以使用加窗函数和回波值在一个或多个窗口中改变音频信号。 公开了附加的方法和系统。

公开(公告)号：US20160314798A1

公开(公告)日：2016-10-27

申请号：US15200404

申请日：2016-07-01

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATION

发明人： Seungkwon BEACK ,  Tae Jin LEE ,  Min Je KIM ,  Kyeongok KANG ,  Dae Young JANG ,  Jeongil SEO ,  Jin Woo HONG ,  Chieteuk AHN ,  Ho Chong PARK ,  Young-cheol PARK

IPC分类号： G10L19/22 ,  G10L19/022 ,  G10L19/06

CPC分类号： G10L19/22 ,  G10L19/022 ,  G10L19/06 ,  G10L19/18

摘要： A Unified Speech and Audio Codec (USAC) that may process a window sequence based on mode switching is provided. The USAC may perform encoding or decoding by overlapping between frames based on a folding point when mode switching occurs. The USAC may process different window sequences for each situation to perform encoding or decoding, and thereby may improve a coding efficiency.

公开(公告)号：US20160284359A1

公开(公告)日：2016-09-29

申请号：US15177265

申请日：2016-06-08

申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

发明人： Andreas NIEDERMEIER ,  Stephan WILDE ,  Daniel FISCHER ,  Matthias HILDENBRAND ,  Marc GAYER ,  Max NEUENDORF

IPC分类号： G10L19/22 ,  G10L19/16 ,  G10L19/022

CPC分类号： G10L19/22 ,  G10L19/022 ,  G10L19/167 ,  G10L19/20 ,  G10L19/24 ,  G10L21/038

摘要： An apparatus for decoding an encoded audio signal including bandwidth extension control data indicating either a first harmonic bandwidth extension mode or a second non-harmonic bandwidth extension mode, includes: an input interface for receiving the encoded audio signal including the bandwidth extension control data indicating either the first harmonic bandwidth extension mode or the second non-harmonic bandwidth extension mode; a processor for decoding the audio signal using the second non-harmonic bandwidth extension mode; and a controller for controlling the processor to decode the audio signal using the second non-harmonic bandwidth extension mode, even when the bandwidth extension control data indicates the first harmonic bandwidth extension mode for the encoded signal.

摘要翻译： 一种用于对包括指示第一谐波带宽扩展模式或第二非谐波带宽扩展模式的带宽扩展控制数据的编码音频信号进行解码的装置包括：用于接收包括频带扩展控制数据的编码音频信号的输入接口， 第一谐波带宽扩展模式或第二非谐波带宽扩展模式; 处理器，用于使用第二非谐波带宽扩展模式对音频信号进行解码; 以及控制器，即使当带宽扩展控制数据指示用于编码信号的一次谐波带宽扩展模式时，控制处理器使用第二非谐波带宽扩展模式对音频信号进行解码。

公开(公告)号：US20160268987A1

公开(公告)日：2016-09-15

申请号：US14643632

申请日：2015-03-10

申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

发明人： Gaurav Talwar ,  Xufang Zhao ,  MD Foezur Rahman Chowdhury ,  Eli Tzirkel-Hancock

IPC分类号： H03G3/00 ,  G06F3/16

CPC分类号： G06F3/165 ,  G06F3/162 ,  G10L15/28 ,  G10L19/022 ,  G10L21/04

摘要： A system and method of adjusting digital audio sampling used with wideband audio includes: performing audio sampling on an analog audio signal at an initial sampling rate and an initial bit rate over a wideband audio frequency range; generating a digital audio signal based on the audio sampling; detecting a qualitative error rate between the analog audio signal and the digital audio signal; and decreasing the initial sampling rate, the initial bit rate, or both for sampling subsequent analog audio when the qualitative error is below a threshold.

摘要翻译： 调整与宽带音频一起使用的数字音频采样的系统和方法包括：以初始采样率对模拟音频信号进行音频采样，并在宽带音频频率范围内执行初始比特率; 基于音频采样生成数字音频信号; 检测模拟音频信号和数字音频信号之间的定性错误率; 并且当定性误差低于阈值时，降低初始采样率，初始比特率或两者用于对后续模拟音频进行采样。

公开(公告)号：US20160267917A1

公开(公告)日：2016-09-15

申请号：US15071569

申请日：2016-03-16

申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. ,  Dolby International AB

发明人： Sascha DISCH ,  Frederik NAGEL ,  Stephan WILDE ,  Lars VILLEMOES ,  Per EKSTRAND

IPC分类号： G10L19/02 ,  G10L19/26 ,  G10L19/16 ,  G10L19/022

CPC分类号： G10L19/0208 ,  G10L19/022 ,  G10L19/16 ,  G10L19/26 ,  G10L21/038

摘要： An apparatus for generating a bandwidth extended audio signal from an input signal, includes a patch generator for generating one or more patch signals from the input signal, wherein the patch generator is configured for performing a time stretching of subband signals from an analysis filterbank, and wherein the patch generator further includes a phase adjuster for adjusting phases of the subband signals using a filterbank-channel dependent phase correction.

公开(公告)号：US20160267916A1

公开(公告)日：2016-09-15

申请号：US15161230

申请日：2016-05-21

申请人： Digital Rise Technology Co., Ltd.

发明人： Yuli You

IPC分类号： G10L19/025 ,  G10L19/24 ,  G10L19/16

CPC分类号： G10L19/025 ,  G10L19/008 ,  G10L19/0208 ,  G10L19/022 ,  G10L19/035 ,  G10L19/038 ,  G10L19/167 ,  G10L19/24

摘要： Provided are systems, methods and techniques for processing frame-based data. A frame of data, an indication that a transient occurs within the frame, and a location of the transient within the frame are obtained. Based on the indication of the transient, a block size is set for the frame, thereby effectively defining a plurality of equal-sized blocks within the frame. In addition, different window functions are selected for different ones of the plurality of equal-sized blocks based on the location of the transient, and the frame of data is processed by applying the selected window functions.

摘要翻译： 提供了用于处理基于帧的数据的系统，方法和技术。 获得一帧数据，在帧内发生瞬态的指示，以及该帧内瞬态的位置。 基于瞬态的指示，为帧设置块大小，从而有效地定义帧内的多个相等大小的块。 此外，基于瞬态的位置，针对多个等大小块中的不同窗口功能选择不同的窗口功能，并且通过应用所选择的窗口功能来处理数据帧。

公开(公告)号：US09384750B2

公开(公告)日：2016-07-05

申请号：US14505739

申请日：2014-10-03

申请人： Dolby International AB

发明人： Lars Villemoes ,  Per Ekstrand

IPC分类号： H03G5/00 ,  G10L19/26 ,  G10L21/038

CPC分类号： G10L21/038 ,  G10L19/0204 ,  G10L19/022 ,  G10L19/265

摘要： The present invention relates to coding of audio signals, and in particular to high frequency reconstruction methods including a frequency domain harmonic transposer. A system and method for generating a high frequency component of a signal from a low frequency component of the signal is described. The system comprises an analysis filter bank (501) comprising an analysis transformation unit (601) having a frequency resolution of Δf; and an analysis window (611) having a duration of DA; the analysis filter bank (501) being configured to provide a set of analysis subband signals from the low frequency component of the signal; a nonlinear processing unit (502, 650) configured to determine a set of synthesis subband signals based on a portion of the set of analysis subband signals, wherein the portion of the set of analysis subband signals is phase shifted by a transposition order T; and a synthesis filter bank (504) comprising a synthesis transformation unit (602) having a frequency resolution of QΔf; and a synthesis window (612) having a duration of DS; the synthesis filter bank (504) being configured to generate the high frequency component of the signal from the set of synthesis subband signals; wherein Q is a frequency resolution factor with Q≧1 and smaller than the transposition order T; and wherein the value of the product of the frequency resolution Δf and the duration DA of the analysis filter bank is selected based on the frequency resolution factor Q.

摘要翻译： 本发明涉及音频信号的编码，特别涉及包括频域谐波转移器的高频重构方法。 描述了用于从信号的低频分量产生信号的高频分量的系统和方法。 该系统包括分析滤波器组（501），其包括频率分辨率为＆Dgr; f的分析变换单元（601） 和具有DA持续时间的分析窗口（611）; 所述分析滤波器组（501）被配置为从所述信号的低频分量提供一组分析子带信号; 非线性处理单元（502,650），被配置为基于所述一组分析子带信号来确定一组合成子带信号，其中所述一组分析子带信号的所述部分被相移一个换位阶数T; f）具有频率分辨率为Q＆Dgr; f的合成变换单元（602）的合成滤波器组（504） 和具有DS持续时间的合成窗口（612）; 所述合成滤波器组（504）被配置为从所述一组合成子带信号中产生所述信号的高频分量; 其中Q是具有Q≥1且小于置换次数T的频率分辨率因子; 并且其中基于频率分辨率因子Q选择频率分辨率＆Dgr; f的乘积值和分析滤波器组的持续时间DA。