专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

51. 发明申请

US20050096917A1 Methods for improving high frequency reconstruction 有权
标题翻译：改善高频重建的方法
公开(公告)号：US20050096917A1
公开(公告)日：2005-05-05
申请号：US10497450
申请日：2002-11-28
申请人： Kristofer Kjorling , Per Ekstrand , Holger Horich
发明人： Kristofer Kjorling , Per Ekstrand , Holger Horich
IPC分类号： G10L19/02 , G10L19/07 , G10L19/24 , G10L21/02 , G10L21/038 , G10L19/00
CPC分类号： G10L19/0208 , G10L19/0017 , G10L19/0204 , G10L19/028 , G10L19/06 , G10L19/07 , G10L19/093 , G10L19/167 , G10L19/24 , G10L19/26 , G10L19/265 , G10L21/038
摘要： The present invention proposes a new method and a new apparatus for enhancement of audio source coding systems utilising high frequency reconstruction (HFR). It utilises a detection mechanism (703a) on the encoder side to assess what parts of the spectrum will not be correctly reproduced by the HFR method in the decoder. Information on this is efficiently coded (703b) and sent to the decoder, where it is combined with the output of the HFR unit.
摘要翻译：本发明提出了一种利用高频重构（HFR）来增强音频源编码系统的新方法和新装置。它利用编码器侧的检测机制（703a）来评估在解码器中HFR方法不能正确地再现频谱的哪些部分。关于此的信息被有效地编码（703b）并且被发送到解码器，其中它与HFR单元的输出组合。

52. 发明授权

US09792915B2 Apparatus and method for processing an input audio signal using cascaded filterbanks 有权
公开(公告)号：US09792915B2
公开(公告)日：2017-10-17
申请号：US13604364
申请日：2012-09-05
申请人： Lars Villemoes , Per Ekstrand , Sascha Disch , Frederik Nagel , Stephan Wilde
发明人： Lars Villemoes , Per Ekstrand , Sascha Disch , Frederik Nagel , Stephan Wilde
IPC分类号： G10L19/008 , G10L19/02 , G10L21/038 , G10L21/04
CPC分类号： G10L19/008 , G10L19/0204 , G10L21/038 , G10L21/04
摘要： An apparatus for processing an input audio signal relies on a cascade of filterbanks, the cascade having a synthesis filterbank for synthesizing an audio intermediate signal from the input audio signal, the input audio signal being represented by a plurality of first subband signals generated by an analysis filterbank, wherein a number of filterbank channels of the synthesis filterbank is smaller than a number of channels of the analysis filterbank. The apparatus furthermore has a further analysis filterbank for generating a plurality of second subband signals from the audio intermediate signal, wherein the further analysis filterbank has a number of channels being different from the number of channels of the synthesis filterbank, so that a sampling rate of a subband signal of the plurality of second subband signals is different from a sampling rate of a first subband signal of the plurality of first subband signals.

53. 发明授权

US09305557B2 Apparatus and method for processing an audio signal using patch border alignment 有权
标题翻译：使用补丁边界对齐处理音频信号的装置和方法
公开(公告)号：US09305557B2
公开(公告)日：2016-04-05
申请号：US13604336
申请日：2012-09-05
申请人： Frederik Nagel , Sascha Disch , Stephan Wilde , Lars Villemoes , Per Ekstrand
发明人： Frederik Nagel , Sascha Disch , Stephan Wilde , Lars Villemoes , Per Ekstrand
IPC分类号： G10L19/08 , G10L19/008 , G10L19/02 , G10L21/038 , G10L21/04
CPC分类号： G10L19/008 , G10L19/0204 , G10L21/038 , G10L21/04
摘要： Apparatus for processing an audio signal to generate a bandwidth extended signal having a high frequency part and a low frequency part using parametric data for the high frequency part, the parametric data relating to frequency bands of the high frequency part includes a patch border calculator for calculating a patch border such that the patch border coincides with a frequency band border of the frequency bands. The apparatus further includes a patcher for generating a patched signal using the audio signal and the patch border.
摘要翻译：用于处理音频信号以使用高频部分的参数数据产生具有高频部分和低频部分的带宽扩展信号的装置，与高频部分的频带有关的参数数据包括用于计算的频块边界计算器贴片边界使得贴片边界与频带的频带边界重合。该装置还包括一个修补器，用于使用音频信号和补片边界产生修补信号。

54. 发明授权

US09236061B2 Harmonic transposition in an audio coding method and system 有权
标题翻译：音频编码方法和系统中的谐波转置
公开(公告)号：US09236061B2
公开(公告)日：2016-01-12
申请号：US12881821
申请日：2010-09-14
申请人： Per Ekstrand , Lars Villemoes
发明人： Per Ekstrand , Lars Villemoes
IPC分类号： G10L21/04 , G10L19/022 , G10L21/038
CPC分类号： G10L19/022 , G10L19/0212 , G10L19/24 , G10L21/038 , G10L21/04
摘要： The present invention relates to transposing signals in time and/or frequency and in particular to coding of audio signals. More particular, the present invention relates to high frequency reconstruction (HFR) methods including a frequency domain harmonic transposer. A method and system for generating a transposed output signal from an input signal using a transposition factor T is described. The system comprises an analysis window of length La, extracting a frame of the input signal, and an analysis transformation unit of order M transforming the samples into M complex coefficients. M is a function of the transposition factor T. The system further comprises a nonlinear processing unit altering the phase of the complex coefficients by using the transposition factor T, a synthesis transformation unit of order M transforming the altered coefficients into M altered samples, and a synthesis window of length Ls, generating a frame of the output signal.
摘要翻译：本发明涉及在时间和/或频率上转置信号，特别涉及音频信号的编码。更具体地，本发明涉及包括频域谐波转移器的高频重构（HFR）方法。描述了使用转置因子T从输入信号生成转置输出信号的方法和系统。该系统包括长度为La的分析窗口，提取输入信号的帧，以及将样本变换为M个复系数的阶数M的分析变换单元。 M是转置因子T的函数。该系统还包括通过使用转置因子T来改变复系数的相位的非线性处理单元，将改变的系数转换为M个改变的样本的阶数M的合成变换单元，以及合成窗口长度Ls，产生输出信号的帧。

55. 发明授权

US08543385B2 Enhancing perceptual performance of SBR and related HFR coding methods by adaptive noise-floor addition and noise substitution limiting 有权
标题翻译：通过自适应噪声底板加法和噪声替换限制来增强SBR和相关HFR编码方法的感知性能
公开(公告)号：US08543385B2
公开(公告)日：2013-09-24
申请号：US13460789
申请日：2012-04-30
申请人： Lars G. Liljeryd , Kristofer Kjoerlink , Per Ekstrand , Frederik Henn
发明人： Lars G. Liljeryd , Kristofer Kjoerlink , Per Ekstrand , Frederik Henn
IPC分类号： G10L19/00 , G10L19/14
CPC分类号： G10L19/028 , G10L19/035 , G10L19/06 , G10L19/26 , G10L19/265 , G10L21/038 , G10L25/18
摘要： The present proposes new methods and an apparatus for enhancement of source coding systems utilizing high frequency reconstruction (HFR). It addresses the problem of insufficient noise contents in a reconstructed highband, by Adaptive Noise-floor Addition. It also introduces new methods for enhanced performance by means of limiting unwanted noise, interpolation and smoothing of envelope adjustment amplification factors. The present invention is applicable to both speech coding and natural audio coding systems.
摘要翻译：本发明提出了利用高频重建（HFR）来增强源编码系统的新方法和装置。它通过自适应噪声层加法解决了重构高频带中噪声含量不足的问题。它还通过限制不需要的噪声，包络调整放大因子的插值和平滑来介绍新的增强性能的方法。本发明适用于语音编码和自然音频编码系统。

56. 发明授权

US08543232B2 Spectral translation/folding in the subband domain 有权
标题翻译：频域翻译/折叠在子带域
公开(公告)号：US08543232B2
公开(公告)日：2013-09-24
申请号：US13460797
申请日：2012-04-30
申请人： Lars Liljeryd , Per Ekstrand , Fredrik Henn , Kristofer Kjoerling
发明人： Lars Liljeryd , Per Ekstrand , Fredrik Henn , Kristofer Kjoerling
IPC分类号： G06F17/00
CPC分类号： G10L19/0208 , G10L19/0017 , G10L19/0204 , G10L19/26 , G10L19/265 , G10L21/038
摘要： The present invention relates to a new method and apparatus for improvement of High Frequency Reconstruction (HFR) techniques using frequency translation or folding or a combination thereof. The proposed invention is applicable to audio source coding systems. This is accomplished by means of frequency translation in the frequency domain with spectral envelope adjustment in the same domain. The proposed invention offers a low-complexity HFR method useful in speech and natural audio coding applications.
摘要翻译：本发明涉及使用频率转换或折叠或其组合来改进高频重建（HFR）技术的新方法和装置。本发明适用于音频源编码系统。这是通过在频域中的频率转换并且在相同的域中进行频谱包络调整来实现的。所提出的发明提供了一种在语音和自然音频编码应用中有用的低复杂度HFR方法。

57. 发明申请

US20130058498A1 DEVICE AND METHOD FOR IMPROVED MAGNITUDE RESPONSE AND TEMPORAL ALIGNMENT IN A PHASE VOCODER BASED BANDWIDTH EXTENSION METHOD FOR AUDIO SIGNALS 有权
标题翻译：用于音频信号的基于相位VOCODER的带宽延迟扩展方法中改进的波形响应和时间对准的装置和方法
公开(公告)号：US20130058498A1
公开(公告)日：2013-03-07
申请号：US13604313
申请日：2012-09-05
申请人： Sascha Disch , Frederik Nagel , Stephan Wilde , Lars Villemoes , Per Ekstrand
发明人： Sascha Disch , Frederik Nagel , Stephan Wilde , Lars Villemoes , Per Ekstrand
IPC分类号： H04R1/40
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.
摘要翻译：一种用于从输入信号产生带宽扩展音频信号的装置，包括用于从所述输入信号产生一个或多个贴片信号的贴片发生器，其中所述贴片发生器被配置为执行来自分析滤波器组的子带信号的时间拉伸，以及其中所述补丁发生器还包括相位调整器，用于使用滤波器组信道相关相位校正来调整所述子带信号的相位。

58. 发明申请

US20130051571A1 APPARATUS AND METHOD FOR PROCESSING AN AUDIO SIGNAL USING PATCH BORDER ALIGNMENT 有权
标题翻译：使用PATCH边界对齐处理音频信号的装置和方法
公开(公告)号：US20130051571A1
公开(公告)日：2013-02-28
申请号：US13604336
申请日：2012-09-05
申请人： Frederik Nagel , Sascha Disch , Stephan Wilde , Lars Villemoes , Per Ekstrand
发明人： Frederik Nagel , Sascha Disch , Stephan Wilde , Lars Villemoes , Per Ekstrand
IPC分类号： H04R29/00
CPC分类号： G10L19/008 , G10L19/0204 , G10L21/038 , G10L21/04
摘要： Apparatus for processing an audio signal to generate a bandwidth extended signal having a high frequency part and a low frequency part using parametric data for the high frequency part, the parametric data relating to frequency bands of the high frequency part includes a patch border calculator for calculating a patch border such that the patch border coincides with a frequency band border of the frequency bands. The apparatus further includes a patcher for generating a patched signal using the audio signal and the patch border.
摘要翻译：用于处理音频信号以使用高频部分的参数数据产生具有高频部分和低频部分的带宽扩展信号的装置，与高频部分的频带有关的参数数据包括用于计算的频块边界计算器贴片边界使得贴片边界与频带的频带边界重合。该装置还包括一个修补器，用于使用音频信号和补片边界产生修补信号。

59. 再颁专利

USRE43189E1 Enhancing perceptual performance of SBR and related HFR coding methods by adaptive noise-floor addition and noise substitution limiting 有权
标题翻译：通过自适应噪声底板加法和噪声替换限制来增强SBR和相关HFR编码方法的感知性能
公开(公告)号：USRE43189E1
公开(公告)日：2012-02-14
申请号：US11371309
申请日：2000-01-26
申请人： Lars G. Liljeryd , Kristofer Kjoerling , Per Ekstrand , Frederik Henn
发明人： Lars G. Liljeryd , Kristofer Kjoerling , Per Ekstrand , Frederik Henn
IPC分类号： G10L19/00 , G10L19/14
CPC分类号： G10L19/028 , G10L19/035 , G10L19/06 , G10L19/26 , G10L19/265 , G10L21/038 , G10L25/18
摘要： Methods and an apparatus for enhancement of source coding systems utilizing high frequency reconstruction (HFR) are introduced. The problem of insufficient noise contents is addressed in a reconstructed highband, by using Adaptive Noise-floor Addition. New methods are also introduced for enhanced performance by means of limiting unwanted noise, interpolation and smoothing of envelope adjustment amplification factors. The methods and apparatus used are applicable to both speech coding and natural audio coding systems.
摘要翻译：引入了利用高频重建（HFR）来增强源编码系统的方法和装置。通过使用自适应噪声层加法，在重构的高频带中解决噪声含量不足的问题。还引入了新的方法，通过限制不需要的噪声，包络调整放大因子的内插和平滑来增强性能。所使用的方法和装置适用于语音编码和自然音频编码系统。

60. 发明申请

US20110004479A1 HARMONIC TRANSPOSITION 有权
标题翻译：谐波传输
公开(公告)号：US20110004479A1
公开(公告)日：2011-01-06
申请号：US12881821
申请日：2010-09-14
申请人： Per Ekstrand , Lars Villemoes
发明人： Per Ekstrand , Lars Villemoes
IPC分类号： G10L19/00
CPC分类号： G10L19/022 , G10L19/0212 , G10L19/24 , G10L21/038 , G10L21/04
摘要： The present invention relates to transposing signals in time and/or frequency and in particular to coding of audio signals. More particular, the present invention relates to high frequency reconstruction (HFR) methods including a frequency domain harmonic transposer. A method and system for generating a transposed output signal from an input signal using a transposition factor T is described. The system comprises an analysis window of length La, extracting a frame of the input to signal, and an analysis transformation unit of order M transforming the samples into M complex coefficients. M is a function of the transposition factor T. The system further comprises a nonlinear processing unit altering the phase of the complex coefficients by using the transposition factor T, a synthesis transformation unit of order M transforming the altered coefficients into M altered samples, and a synthesis window of length Ls, generating a frame of the output signal.
摘要翻译：本发明涉及在时间和/或频率上转置信号，特别涉及音频信号的编码。更具体地，本发明涉及包括频域谐波转移器的高频重构（HFR）方法。描述了使用转置因子T从输入信号生成转置输出信号的方法和系统。该系统包括长度为La的分析窗口，提取输入信号的帧，以及将样本变换为M个复系数的阶数M的分析变换单元。 M是转置因子T的函数。该系统还包括通过使用转置因子T来改变复系数的相位的非线性处理单元，将改变的系数转换为M个改变的样本的阶数M的合成变换单元，以及合成窗口长度Ls，产生输出信号的帧。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式