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1. 发明授权

US08831959B2 Transform audio codec and methods for encoding and decoding a time segment of an audio signal 有权
标题翻译：转换音频编解码器和用于对音频信号的时间段进行编码和解码的方法
公开(公告)号：US08831959B2
公开(公告)日：2014-09-09
申请号：US13183950
申请日：2011-07-15
申请人： Volodya Grancharov , Sigurdur Sverrisson
发明人： Volodya Grancharov , Sigurdur Sverrisson
IPC分类号： G10L19/00 , H03M5/00 , G10L19/12 , G01L19/02
CPC分类号： G01L19/02 , G10L19/02 , G10L19/0212 , G10L19/032
摘要： Methods and devices for efficient encoding/decoding of a time segment of an audio signal. Methods comprise deriving an indicator, z, of the position in a frequency scale of a residual vector associated with the time segment of the audio signal, and deriving a measure, Φ, related to the amount of structure of the residual vector. The methods further comprise determining whether a predefined criterion involving the measure Φ, the indicator z and a predefined threshold Θ, is fulfilled, which corresponds to estimating whether a change of sign of at least some of the non-zero coefficients of the residual vector would be audible after reconstruction of the audio signal time segment. The amplitude of the coefficients of the residual vector is encoded, and the signs of the coefficients of the residual vector are encoded only when it is determined that the criterion is fulfilled, and thus that a change of sign would be audible.
摘要翻译：用于对音频信号的时间段进行有效编码/解码的方法和装置。方法包括导出与音频信号的时间段相关联的残差矢量的频率范围中的位置的指示符，以及导出与残差向量的结构量有关的测量值Φ。所述方法还包括确定是否满足涉及测量Φ，指示符z和预定义阈值Θ的预定准则，其对应于估计残差向量中的至少一些非零系数的符号变化是否将在音频信号时间段重建后可听见。对残差向量的系数的幅度进行编码，并且仅当确定标准满足时才对编码残差矢量的系数的符号进行编码，从而可以听到符号变化。

2. 发明授权

US09546924B2 Transform audio codec and methods for encoding and decoding a time segment of an audio signal 有权
标题翻译：转换音频编解码器和用于对音频信号的时间段进行编码和解码的方法
公开(公告)号：US09546924B2
公开(公告)日：2017-01-17
申请号：US14127761
申请日：2011-06-30
申请人： Volodya Grancharov , Sigurdur Sverrisson
发明人： Volodya Grancharov , Sigurdur Sverrisson
IPC分类号： G10L19/00 , G01L19/02 , G10L19/032 , G10L19/02
CPC分类号： G01L19/02 , G10L19/02 , G10L19/0212 , G10L19/032
摘要： Methods and devices for efficient encoding/decoding of a time segment of an audio signal. The methods comprise deriving an indicator, z, of the position in a frequency scale of a residual vector associated with the time segment of the audio signal, and deriving a measure, Φ, related to the amount of structure of the residual vector. The methods further comprise determining whether a predefined criterion involving the measure Φ, the indicator z and a predefined threshold Θ, is fulfilled, which corresponds to estimating whether a change of sign of at least some of the non-zero coefficients of the residual vector would be audible after reconstruction of the audio signal time segment. The respective amplitude of the coefficients of the residual vector is encoded, and the signs of the coefficients of the residual vector are encoded only when it is determined that the criterion is fulfilled, and thus that a change of sign would be audible.
摘要翻译：用于对音频信号的时间段进行有效编码/解码的方法和装置。所述方法包括导出与音频信号的时间段相关联的残差向量的频率标度中的位置的指示符，以及导出与残差矢量的结构量相关的度量Φ。所述方法还包括确定是否满足涉及测量Φ，指示符z和预定义阈值Θ的预定准则，其对应于估计残差向量中的至少一些非零系数的符号变化是否将在音频信号时间段重建后可听见。编码残差向量的系数的相应幅度，并且仅当确定标准满足时才对编码残差矢量的系数的符号进行编码，并且因此可以听到符号改变。

3. 发明授权

US09424856B2 Filling of non-coded sub-vectors in transform coded audio signals 有权
标题翻译：在变换编码音频信号中填充非编码子矢量
公开(公告)号：US09424856B2
公开(公告)日：2016-08-23
申请号：US14003820
申请日：2011-09-14
申请人： Volodya Grancharov , Sebastian Näslund , Sigurdur Sverrisson
发明人： Volodya Grancharov , Sebastian Näslund , Sigurdur Sverrisson
IPC分类号： G10L19/22 , G10L19/02 , G10L19/028 , G10L19/00
CPC分类号： G10L19/02 , G10L19/0212 , G10L19/028 , G10L19/038 , G10L21/038 , G10L2019/0007
摘要： A spectrum filler for filling non-coded residual sub-vectors of a transform coded audio signal includes a sub-vector compressor (42) configured to compress actually coded residual sub-vectors. A sub-vector rejecter (44) is configured to reject compressed residual sub-vectors that do not fulfill a predetermined sparseness criterion. A sub-vector collector (46) is configured to concatenate the remaining compressed residual sub-vectors to form a first virtual codebook (VC1). A coefficient combiner (48) is configured to combine pairs of coefficients of the first virtual codebook (VC1) to form a second virtual codebook (VC2). A sub-vector filler (50) is configured to fill non-coded residual sub-vectors below a predetermined frequency with coefficients from the first virtual codebook (VC1), and to fill non-coded residual sub-vectors above the predetermined frequency with coefficients from the second virtual codebook (VC2).
摘要翻译：用于填充变换编码音频信号的非编码残余子向量的频谱填充器包括被配置为压缩实际编码的残余子向量的子矢量压缩器（42）。子向量拒绝（44）被配置为拒绝不满足预定稀疏标准的压缩的残余子向量。子矢量收集器（46）被配置为连接剩余的压缩的残余子向量以形成第一虚拟码本（VC1）。系数组合器（48）被配置为组合第一虚拟码本（VC1）的系数对以形成第二虚拟码本（VC2）。子向量填充器（50）被配置为用来自第一虚拟码本（VC1）的系数填充低于预定频率的非编码残差子向量，并且填充具有系数的预定频率以上的非编码残差子向量从第二虚拟码本（VC2）。

4. 发明授权

US09269364B2 Audio encoding/decoding based on an efficient representation of auto-regressive coefficients 有权
标题翻译：基于自回归系数的有效表示的音频编码/解码
公开(公告)号：US09269364B2
公开(公告)日：2016-02-23
申请号：US14355031
申请日：2012-05-15
申请人： Volodya Grancharov , Sigurdur Sverrisson
发明人： Volodya Grancharov , Sigurdur Sverrisson
IPC分类号： G10L25/00 , G10L19/032 , G10L19/06 , G10L21/00 , G10L19/02
CPC分类号： G10L19/038 , G10L19/0204 , G10L19/032 , G10L19/06 , G10L21/038 , G10L2019/001
摘要： Described is an encoder (50) for encoding a parametric spectral representation (f) of auto-regressive coefficients that partially represent an audio signal. The encoder includes a low-frequency encoder (10) configured to quantize elements of a part of the parametric spectral representation that correspond to a low-frequency part of the audio signal. It also includes a high-frequency encoder (12) configured to encode a high-frequency part (fH) of the parametric spectral representation (f) by weighted averaging based on the quantized elements (fL) flipped around a quantized mirroring frequency (fm), which separates the low-frequency part from the high-frequency part, and a frequency grid determined from a frequency grid codebook (24) in a closed-loop search procedure. Described are also a corresponding decoder, corresponding encoding/decoding methods and UEs including such an encoder/decoder.
摘要翻译：描述了用于对部分地表示音频信号的自回归系数的参数频谱表示（f）进行编码的编码器（50）。编码器包括被配置为量化与音频信号的低频部分对应的参数频谱表示的一部分的元素的低频编码器（10）。它还包括高频编码器（12），其被配置为通过基于量化的镜像频率（fm）周围翻转的量化元件（fL）通过加权平均来编码参数频谱表示（f）的高频部分（fH），其分离低频部分与高频部分，以及在闭环搜索过程中从频率格码码本（24）确定的频率网格。还描述了相应的解码器，对应的编码/解码方法和包括这样的编码器/解码器的UE。

5. 发明申请

US20140249828A1 Audio Encoding/Decoding based on an Efficient Representation of Auto-Regressive Coefficients 有权
标题翻译：基于自动回归系数的有效表示的音频编码/解码
公开(公告)号：US20140249828A1
公开(公告)日：2014-09-04
申请号：US14355031
申请日：2012-05-15
申请人： Volodya Grancharov , Sigurdur Sverrisson
发明人： Volodya Grancharov , Sigurdur Sverrisson
IPC分类号： G10L19/032
CPC分类号： G10L19/038 , G10L19/0204 , G10L19/032 , G10L19/06 , G10L21/038 , G10L2019/001
摘要： Described is an encoder (50) for encoding a parametric spectral representation (f) of auto-regressive coefficients that partially represent an audio signal. The encoder includes a low-frequency encoder (10) configured to quantize elements of a part of the parametric spectral representation that correspond to a low-frequency part of the audio signal. It also includes a high-frequency encoder (12) configured to encode a high-frequency part (fH) of the parametric spectral representation (f) by weighted averaging based on the quantized elements (fL) flipped around a quantized mirroring frequency (fm), which separates the low-frequency part from the high-frequency part, and a frequency grid determined from a frequency grid codebook (24) in a closed-loop search procedure. Described are also a corresponding decoder, corresponding encoding/decoding methods and UEs including such an encoder/decoder.
摘要翻译：描述了用于对部分地表示音频信号的自回归系数的参数频谱表示（f）进行编码的编码器（50）。编码器包括被配置为量化与音频信号的低频部分对应的参数频谱表示的一部分的元素的低频编码器（10）。它还包括高频编码器（12），其被配置为基于在量化的镜像频率（fm）周围翻转的量化元件（fL）通过加权平均来编码参数频谱表示（f）的高频部分（fH），其分离低频部分与高频部分，以及在闭环搜索过程中从频率格码码本（24）确定的频率网格。还描述了相应的解码器，对应的编码/解码方法和包括这样的编码器/解码器的UE。

6. 发明授权

US09031835B2 Methods and arrangements for loudness and sharpness compensation in audio codecs 有权
标题翻译：音频编解码器的响度和清晰度补偿的方法和布置
公开(公告)号：US09031835B2
公开(公告)日：2015-05-12
申请号：US13510333
申请日：2010-06-29
申请人： Volodya Grancharov , Sigurdur Sverrisson
发明人： Volodya Grancharov , Sigurdur Sverrisson
IPC分类号： G10L19/02 , G10L21/038 , G10L19/26
CPC分类号： G10L21/038 , G10L19/265
摘要： In a method of improving perceived loudness and sharpness of a reconstructed speech signal delimited by a predetermined bandwidth, performing the steps of providing (S10) the speech signal, and separating (S20) the provided signal into at least a first and a second signal portion. Subsequently, adapting (S30) the first signal portion to emphasize at least a predetermined frequency or frequency interval within the first bandwidth portion. Finally, reconstructing (S40) the second signal portion based on at least the first signal portion, and combining (S50) the adapted first signal portion and the reconstructed second signal portion to provide a reconstructed speech signal with an overall improved perceived loudness and sharpness.
摘要翻译：在改善由预定带宽限定的重构语音信号的感知响度和清晰度的方法中，执行提供（S10）语音信号的步骤，并将所提供的信号（S20）分解成至少第一和第二信号部分。随后，适配（S30）第一信号部分以强调第一带宽部分内的至少预定频率或频率间隔。最后，至少基于第一信号部分重建（S40）第二信号部分，并组合（S50）适配的第一信号部分和重构的第二信号部分，以提供具有总体改善的感知响度和锐度的重构语音信号。

7. 发明授权

US08929568B2 Bandwidth extension of a low band audio signal 有权
标题翻译：低频音频信号的带宽扩展
公开(公告)号：US08929568B2
公开(公告)日：2015-01-06
申请号：US13509859
申请日：2010-09-14
申请人： Volodya Grancharov , Stefan Bruhn , Harald Pobloth , Sigurdur Sverrisson
发明人： Volodya Grancharov , Stefan Bruhn , Harald Pobloth , Sigurdur Sverrisson
IPC分类号： H03G5/00 , G10L21/038
CPC分类号： G10L21/038 , G10L21/0388
摘要： Estimation of a high band extension of a low band audio signal includes the following steps: extracting (S1) a set of features of the low band audio signal; mapping (S2) extracted features to at least one high band parameter with generalized additive modeling; frequency shifting (S3) a copy of the low band audio signal into the high band; controlling (S4) the envelope of the frequency shifted copy of the low band audio signal by said at least one high band parameter.
摘要翻译：估计低频带音频信号的高频段扩展包括以下步骤：提取（S1）低频带音频信号的一组特征; 将（S2）提取的特征提供给具有广义加性建模的至少一个高频带参数; 将低频音频信号的副本频移（S3）成高频带; 通过所述至少一个高频带参数来控制（S4）低频带音频信号的频移复制的包络。

8. 发明申请

US20120230515A1 BANDWIDTH EXTENSION OF A LOW BAND AUDIO SIGNAL 有权
标题翻译：低频音频信号的带宽扩展
公开(公告)号：US20120230515A1
公开(公告)日：2012-09-13
申请号：US13509859
申请日：2010-09-14
申请人： Volodya Grancharov , Stefan Bruhn , Harald Pobloth , Sigurdur Sverrisson
发明人： Volodya Grancharov , Stefan Bruhn , Harald Pobloth , Sigurdur Sverrisson
IPC分类号： H03G5/00
CPC分类号： G10L21/038 , G10L21/0388
摘要： Estimation of a high band extension of a low band audio signal includes the following steps: extracting (S1) a set of features of the low band audio signal; mapping (S2) extracted features to at least one high band parameter with generalized additive modeling; frequency shifting (S3) a copy of the low band audio signal into the high band; controlling (S4) the envelope of the frequency shifted copy of the low band audio signal by said at least one high band parameter.
摘要翻译：估计低频带音频信号的高频段扩展包括以下步骤：提取（S1）低频带音频信号的一组特征; 将（S2）提取的特征提供给具有广义加性建模的至少一个高频带参数; 将低频音频信号的副本频移（S3）成高频带; 通过所述至少一个高频带参数来控制（S4）低频带音频信号的频移复制的包络。

9. 发明授权

US09858939B2 Methods and apparatus for post-filtering MDCT domain audio coefficients in a decoder 有权
公开(公告)号：US09858939B2
公开(公告)日：2018-01-02
申请号：US13104565
申请日：2011-05-10
申请人： Volodya Grancharov , Sigurdur Sverrisson
发明人： Volodya Grancharov , Sigurdur Sverrisson
IPC分类号： G10L19/26 , G10L19/02
CPC分类号： G10L19/26 , G10L19/02
摘要： Method and decoder for processing of audio signals. The method and decoder relate to deriving a processed vector {circumflex over (d)} by applying a post-filter directly on a vector d comprising quantized MDCT domain coefficients of a time segment of an audio signal. The post-filter is configured to have a transfer function H which is a compressed version of the envelope of the vector d. A signal waveform is reconstructed by performing an inverse MDCT transform on the processed vector {circumflex over (d)}.

10. 发明申请

US20140114667A1 Transform Audio Codec and Methods for Encoding and Decoding a Time Segment of an Audio Signal 有权
标题翻译：转换音频编解码器和用于对音频信号的时间段进行编码和解码的方法
公开(公告)号：US20140114667A1
公开(公告)日：2014-04-24
申请号：US14127761
申请日：2011-06-30
申请人： Volodya Grancharov , Sigurdur Sverrisson
发明人： Volodya Grancharov , Sigurdur Sverrisson
IPC分类号： G10L19/02
CPC分类号： G01L19/02 , G10L19/02 , G10L19/0212 , G10L19/032
摘要： Methods and devices for efficient encoding/decoding of a time segment of an audio signal. The methods comprise deriving an indicator, z, of the position in a frequency scale of a residual vector associated with the time segment of the audio signal, and deriving a measure, Φ, related to the amount of structure of the residual vector. The methods further comprise determining whether a predefined criterion involving the measure Φ, the indicator z and a predefined threshold Θ, is fulfilled, which corresponds to estimating whether a change of sign of at least some of the non-zero coefficients of the residual vector would be audible after reconstruction of the audio signal time segment. The respective amplitude of the coefficients of the residual vector is encoded, and the signs of the coefficients of the residual vector are encoded only when it is determined that the criterion is fulfilled, and thus that a change of sign would be audible.
摘要翻译：用于对音频信号的时间段进行有效编码/解码的方法和装置。所述方法包括导出与音频信号的时间段相关联的残差向量的频率标度中的位置的指示符，以及导出与残差矢量的结构量相关的度量Φ。所述方法还包括确定是否满足涉及测量Φ，指示符z和预定义阈值Θ的预定准则，其对应于估计残差向量中的至少一些非零系数的符号变化是否将在音频信号时间段重建后可听见。编码残差向量的系数的相应幅度，并且仅当确定标准满足时才对编码残差矢量的系数的符号进行编码，并且因此可以听到符号改变。

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