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1.发明授权Bandwidth extension method, bandwidth extension apparatus, program, integrated circuit, and audio decoding apparatus 有权带宽扩展方法，带宽扩展装置，程序，集成电路和音频解码装置公开(公告)号：US09093080B2
公开(公告)日：2015-07-28
申请号：US13389276
申请日：2011-06-06
IPC分类号： G10L19/00 , G10L21/038 , G10L21/04
CPC分类号： G10L19/02 , G10L21/038 , G10L21/04
摘要： To provide a bandwidth extension method which allows reduction of computation amount in bandwidth extension and suppression of deterioration of quality in the bandwidth to be extended. In the bandwidth extension method: a low frequency bandwidth signal is transformed into a QMF domain to generate a first low frequency QMF spectrum; pitch-shifted signals are generated by applying different shifting factors on the low frequency bandwidth signal; a high frequency QMF spectrum is generated by time-stretching the pitch-shifted signals in the QMF domain; the high frequency QMF spectrum is modified; and the modified high frequency QMF spectrum is combined with the first low frequency QMF spectrum.
摘要翻译： 提供一种允许减少带宽扩展中的计算量并抑制要扩展的带宽中的质量劣化的带宽扩展方法。 在带宽扩展方法中：将低频带宽信号变换成QMF域以产生第一低频QMF频谱; 通过在低频带宽信号上应用不同的移位因子来生成音调移位信号; 通过对QMF域中的音调移位信号进行时间扩展来产生高频QMF频谱; 改变高频QMF频谱; 并且修改的高频QMF频谱与第一低频QMF频谱组合。
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2.发明申请BANDWIDTH EXTENSION METHOD, BANDWIDTH EXTENSION APPARATUS, PROGRAM, INTEGRATED CIRCUIT, AND AUDIO DECODING APPARATUS 有权带宽扩展方法，带宽扩展设备，程序，集成电路和音频解码设备公开(公告)号：US20120136670A1
公开(公告)日：2012-05-31
申请号：US13389276
申请日：2011-06-06
IPC分类号： G10L19/00
CPC分类号： G10L19/02 , G10L21/038 , G10L21/04
摘要： To provide a bandwidth extension method which allows reduction of computation amount in bandwidth extension and suppression of deterioration of quality in the bandwidth to be extended. In the bandwidth extension method: a low frequency bandwidth signal is transformed into a QMF domain to generate a first low frequency QMF spectrum; pitch-shifted signals are generated by applying different shifting factors on the low frequency bandwidth signal; a high frequency QMF spectrum is generated by time-stretching the pitch-shifted signals in the QMF domain; the high frequency QMF spectrum is modified; and the modified high frequency QMF spectrum is combined with the first low frequency QMF spectrum.
摘要翻译： 提供一种允许减少带宽扩展中的计算量并抑制要扩展的带宽中的质量劣化的带宽扩展方法。 在带宽扩展方法中：将低频带宽信号变换成QMF域以产生第一低频QMF频谱; 通过在低频带宽信号上应用不同的移位因子来生成音调移位信号; 通过对QMF域中的音调移位信号进行时间扩展来产生高频QMF频谱; 改变高频QMF频谱; 并且修改的高频QMF频谱与第一低频QMF频谱组合。
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3.发明申请AUDIO SIGNAL PROCESSING APPARATUS, AUDIO CODING APPARATUS, AND AUDIO DECODING APPARATUS 有权音频信号处理装置，音频编码装置和音频解码装置公开(公告)号：US20120022676A1
公开(公告)日：2012-01-26
申请号：US13256055
申请日：2010-10-19
IPC分类号： G06F17/00
CPC分类号： G10L21/04 , G10L21/0388
摘要： To provide an audio signal processing apparatus which can perform, with low operation amount, audio signal processing that is either time stretch and/or compression processing or frequency modulation processing. The audio signal processing apparatus is intended to transform an input audio signal sequence using a predetermined adjustment factor. The audio signal processing apparatus includes a filter bank (2601) which transforms the input audio signal sequence into Quadrature Mirror Filter (QMF) coefficients using a filter for Quadrature Mirror Filter analysis (a QMF analysis filter) and an adjusting unit (2602) which adjusts the QMF coefficients based on a predetermined adjustment factor.
摘要翻译： 提供一种音频信号处理装置，其可以以低操作量执行时间延伸和/或压缩处理或频率调制处理的音频信号处理。 音频信号处理装置旨在使用预定的调节因子来变换输入音频信号序列。 音频信号处理装置包括滤波器组（2601），其使用用于正交镜滤波器分析的滤波器（QMF分析滤波器）和调整单元（2602）将输入音频信号序列变换为正交镜像滤波器（QMF）系数，调整单元（2602） 基于预定调整因子的QMF系数。
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4.发明申请公开(公告)号：US20110268279A1
公开(公告)日：2011-11-03
申请号：US13141169
申请日：2010-10-21
IPC分类号： H04R5/00
CPC分类号： G10L19/265 , G10L19/008 , G10L19/0212 , G10L19/09 , G10L25/90
摘要： Provided is an encoding device (1) including: a pitch contour analysis unit (101) which detects information, a dynamic time-warping unit (102) which generates, based on the information, pitch change ratios (Tw_ratio in FIG. 18) within a range (86) including a range (86a) of the pitch change ratios corresponding to absolute pitch differences of 42 cents or larger; a first lossless coding unit (103) which codes the generated pitch parameters (102x); a time-warping unit (104) which shifts a pitch of a signal according to the information; and a second encoding unit which codes a signal (104x) obtained by the shifting.
摘要翻译： 提供了一种编码装置（1），包括：检测信息的音调轮廓分析单元（101），动态时间扭曲单元（102），其基于该信息生成内部的音调变化率（图18中的Tw_ratio） 包括对应于42分或以上的绝对音调差的音调变化率的范围（86a）的范围（86） 编码所生成的音调参数（102x）的第一无损编码单元（103）。 时间扭曲单元（104），其根据该信息移动信号的音调; 以及第二编码单元，其对通过移位获得的信号（104x）进行编码。
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5.发明授权公开(公告)号：US08886548B2
公开(公告)日：2014-11-11
申请号：US13141169
申请日：2010-10-21
CPC分类号： G10L19/265 , G10L19/008 , G10L19/0212 , G10L19/09 , G10L25/90
摘要： Provided is an encoding device (1) including: a pitch contour analysis unit (101) which detects information, a dynamic time-warping unit (102) which generates, based on the information, pitch change ratios (Tw_ratio in FIG. 18) within a range (86) including a range (86a) of the pitch change ratios corresponding to absolute pitch differences of 42 cents or larger; a first lossless coding unit (103) which codes the generated pitch parameters (102x); a time-warping unit (104) which shifts a pitch of a signal according to the information; and a second encoding unit which codes a signal (104x) obtained by the shifting.
摘要翻译： 提供了一种编码装置（1），包括：检测信息的音调轮廓分析单元（101），动态时间扭曲单元（102），其基于该信息生成内部的音调变化率（图18中的Tw_ratio） 包括对应于42分或以上的绝对音调差的音调变化率的范围（86a）的范围（86） 编码所生成的音调参数（102x）的第一无损编码单元（103）。 时间扭曲单元（104），其根据该信息移动信号的音调; 以及第二编码单元，其对通过移位获得的信号（104x）进行编码。
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公开(公告)号：US20130090929A1
公开(公告)日：2013-04-11
申请号：US13703044
申请日：2011-06-14
IPC分类号： G10L19/04
CPC分类号： G10L19/04 , G10L19/0212 , G10L19/022 , G10L19/107 , G10L19/20
摘要： Provided are a new hybrid audio decoder and a new hybrid audio encoder having block switching for speech signals and audio signals. Currently, very low bitrate audio coding methods for speech and audio signal are proposed. These audio coding methods cause very long delay. Generally, in coding an audio signal, algorithm delay tends to be long to achieve higher frequency resolution. In coding a speech signal, the delay needs to be reduced because the speech signal is used for telecommunication. To balance fine coding quality for these two kinds of input signals with very low bitrate, this invention provides a combination of a low delay filter bank like AAC-ELD and a CELP coding method.
摘要翻译： 提供了一种新的混合音频解码器和具有用于语音信号和音频信号的块切换的新的混合音频编码器。 目前，提出了用于语音和音频信号的非常低的比特率音频编码方法。 这些音频编码方法造成很长的延迟。 通常，在对音频信号进行编码时，算法延迟往往很长以达到更高的频率分辨率。 在对语音信号进行编码时，由于语音信号用于通信，所以需要减小延迟。 为了平衡具有非常低的比特率的这两种输入信号的精细编码质量，本发明提供了像AAC-ELD这样的低延迟滤波器组和CELP编码方法的组合。
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7.发明授权Hybrid audio encoder and hybrid audio decoder which perform coding or decoding while switching between different codecs 有权混合音频编码器和混合音频解码器，其在不同编解码器之间切换时执行编码或解码公开(公告)号：US09275650B2
公开(公告)日：2016-03-01
申请号：US13703044
申请日：2011-06-14
IPC分类号： G10L19/02 , G10L19/04 , G10L19/107 , G10L19/20 , G10L19/022
CPC分类号： G10L19/04 , G10L19/0212 , G10L19/022 , G10L19/107 , G10L19/20
摘要： A new hybrid audio decoder and a new hybrid audio encoder having block switching for speech signals and audio signals are provided. Currently, very low bitrate audio coding methods for speech and audio signals are proposed. These audio coding methods cause very long delays. Generally, in coding an audio signal, an algorithm delay tends to be long to achieve higher frequency resolution. In coding a speech signal, the delay needs to be reduced because the speech signal is used for telecommunication. To balance fine coding quality for speech and audio input signals with very low bitrate, a combination of a low delay filter bank like AAC-ELD and a CELP coding method is provided.
摘要翻译： 提供了一种新的混合音频解码器和具有用于语音信号和音频信号的块切换的新的混合音频编码器。 目前，提出了用于语音和音频信号的非常低的比特率音频编码方法。 这些音频编码方法造成很长的延迟。 通常，在对音频信号进行编码时，算法延迟往往很长以达到更高的频率分辨率。 在对语音信号进行编码时，由于语音信号用于通信，所以需要减小延迟。 为了平衡具有非常低的比特率的语音和音频输入信号的精细编码质量，提供了诸如AAC-ELD的低延迟滤波器组和CELP编码方法的组合。
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8.发明授权Audio signal processing apparatus, audio coding apparatus, and audio decoding apparatus 有权音频信号处理装置，音频编码装置和音频解码装置公开(公告)号：US09026236B2
公开(公告)日：2015-05-05
申请号：US13256055
申请日：2010-10-19
IPC分类号： G06F17/00 , G10L21/04 , G10L21/0388
CPC分类号： G10L21/04 , G10L21/0388
摘要： To provide an audio signal processing apparatus which can perform, with low operation amount, audio signal processing that is either time stretch and/or compression processing or frequency modulation processing. The audio signal processing apparatus is intended to transform an input audio signal sequence using a predetermined adjustment factor. The audio signal processing apparatus includes a filter bank (2601) which transforms the input audio signal sequence into Quadrature Mirror Filter (QMF) coefficients using a filter for Quadrature Mirror Filter analysis (a QMF analysis filter) and an adjusting unit (2602) which adjusts the QMF coefficients based on a predetermined adjustment factor.
摘要翻译： 提供一种音频信号处理装置，其可以以低操作量执行时间延伸和/或压缩处理或频率调制处理的音频信号处理。 音频信号处理装置旨在使用预定的调节因子来变换输入音频信号序列。 音频信号处理装置包括滤波器组（2601），其使用用于正交镜滤波器分析的滤波器（QMF分析滤波器）和调整单元（2602）将输入音频信号序列变换为正交镜像滤波器（QMF）系数，调整单元（2602） 基于预定调整因子的QMF系数。
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公开(公告)号：US20130144611A1
公开(公告)日：2013-06-06
申请号：US13816741
申请日：2011-10-05
IPC分类号： G10L25/90
CPC分类号： G10L25/90 , G10L19/0212 , G10L19/09 , G10L19/26 , G10L19/265 , G10L2025/906
摘要： A coding device includes: a pitch contour detection unit which detects a pitch contour of an input audio signal; a dynamic time warping unit which determines the number of pitch nodes based on the pitch contour and generates a first time warping parameter including information indicating the determined number of pitch nodes, a pitch change position, and a pitch change ratio; a first encoder which codes the first time warping parameter; a time warping unit which corrects pitch, using the information obtained from the first time warping parameter, to approximate the pitches of the number of pitch nodes to a predetermined reference value; a second encoder which codes the input audio signal at the corrected pitch; and a multiplexer which multiplexes the coded time warping parameter and the coded audio signal to generate a bitstream.
摘要翻译： 编码装置包括：音调轮廓检测单元，其检测输入音频信号的音高轮廓; 动态时间扭曲单元，其基于所述音调轮廓来确定音调节点的数量，并且生成包括指示所确定的音调节点数量的信息的第一时间扭曲参数，音高改变位置和音高变化率; 编码第一时间扭曲参数的第一编码器; 使用从第一时间扭曲参数获得的信息来校正音调的时间扭曲单元将音调节点数的音调近似为预定参考值; 第二编码器，以校正的音调对输入音频信号进行编码; 以及复用器，其对编码的时间扭曲参数和编码的音频信号进行复用以生成比特流。
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10.发明授权Coding device, decoding device, coding method, and decoding method for audio signals 有权音频信号的编码装置，解码装置，编码方法和解码方法公开(公告)号：US09117461B2
公开(公告)日：2015-08-25
申请号：US13816741
申请日：2011-10-05
CPC分类号： G10L25/90 , G10L19/0212 , G10L19/09 , G10L19/26 , G10L19/265 , G10L2025/906
摘要： A coding device includes: a pitch contour detection unit which detects a pitch contour of an input audio signal; a dynamic time warping unit which determines the number of pitch nodes based on the pitch contour and generates a first time warping parameter including information indicating the determined number of pitch nodes, a pitch change position, and a pitch change ratio; a first encoder which codes the first time warping parameter; a time warping unit which corrects pitch, using the information obtained from the first time warping parameter, to approximate the pitches of the number of pitch nodes to a predetermined reference value; a second encoder which codes the input audio signal at the corrected pitch; and a multiplexer which multiplexes the coded time warping parameter and the coded audio signal to generate a bitstream.
摘要翻译： 编码装置包括：音调轮廓检测单元，其检测输入音频信号的音高轮廓; 动态时间扭曲单元，其基于所述音调轮廓来确定音调节点的数量，并且生成包括指示所确定的音调节点数量的信息的第一时间扭曲参数，音高改变位置和音高变化率; 编码第一时间扭曲参数的第一编码器; 使用从第一时间扭曲参数获得的信息来校正音调的时间扭曲单元将音调节点数的音调近似为预定参考值; 第二编码器，以校正的音调对输入音频信号进行编码; 以及复用器，其对编码的时间扭曲参数和编码的音频信号进行复用以生成比特流。
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