公开(公告)号：US20130006644A1

公开(公告)日：2013-01-03

申请号：US13173085

申请日：2011-06-30

申请人： Dongping Jiang ,  Hao Yuan ,  Guoming Chen ,  Ke Peng ,  Jiali Li

发明人： Dongping Jiang ,  Hao Yuan ,  Guoming Chen ,  Ke Peng ,  Jiali Li

IPC分类号： G10L19/00

CPC分类号： G10L21/038 ,  G10L19/0204 ,  G10L19/0212 ,  G10L19/028

摘要： The present invention relates to a method and device for spectral band replication, and a method and system for audio decoding, and the method for spectral band replication comprises: A. searching for the position of a certain tone of an audio signal in MDCT frequency domain coefficients; B. according to the tone position, determining a spectral band replication period which is a bandwidth from a 0 frequency point to a frequency point of tone position, and a source frequency segment which is a frequency segment from a frequency point of the 0 frequency point shifting copyband_offset frequency points backwards to a frequency point of the frequency point of the tone position shifting the copyband_offset frequency points backwards, wherein said offset copyband_offset is greater than or equal to 0; and C. according to the spectral band replication period, carrying out spectral band replication on zero bit encoding subbands.

摘要翻译： 本发明涉及一种用于频谱带复制的方法和装置，以及用于音频解码的方法和系统，以及用于频谱带复制的方法包括：A.在MDCT频域中搜索音频信号的某个音调的位置 系数; B.根据音调位置，确定作为从0频点到音调位置的频率点的带宽的频谱带复制周期，以及作为从0频点的频率点开始的频率段的源频段 将复制频带偏移频率点向后移动到音调位置的频率点的频率点向后移动复制频带偏移频率点，其中所述偏移拷贝频带偏移大于或等于0; 和C.根据频谱带复制周期，在零比特编码子带上进行频谱带复制。

公开(公告)号：US08731949B2

公开(公告)日：2014-05-20

申请号：US13173367

申请日：2011-06-30

申请人： Dongping Jiang ,  Hao Yuan ,  Ke Peng ,  Guoming Chen ,  Jiali Li

发明人： Dongping Jiang ,  Hao Yuan ,  Ke Peng ,  Guoming Chen ,  Jiali Li

IPC分类号： G10L19/00

CPC分类号： G10L21/038 ,  G10L19/0204 ,  G10L19/0212 ,  G10L19/028 ,  H03M7/3082 ,  H03M7/4037

摘要： The present invention relates to a method and system for audio encoding and decoding and a method for estimating a noise level, and the method for estimating a noise level in the present invention comprises: estimating a power spectrum of an audio signal to be encoded according to a frequency domain coefficient of the audio signal to be encoded; and estimating a noise level of a zero bit encoding subband audio signal according to the power spectrum obtained by calculating, and this noise level for controlling an energy proportion of noise filling to spectral band replication during decoding; wherein a zero bit encoding subband refers to an encoding subband of which allocated bit number is zero. The present invention can well reconstruct the uncoded frequency domain coefficients.

摘要翻译： 本发明涉及一种用于音频编码和解码的方法和系统，以及用于估计噪声电平的方法，以及本发明的用于估计噪声电平的方法，该方法和系统包括：根据以下方式估计待编码的音频信号的功率谱： 要编码的音频信号的频域系数; 以及根据通过计算得到的功率谱估计零比特编码子带音频信号的噪声电平，并且该噪声电平用于在解码期间控制噪声填充到频谱带复制的能量比例; 其中零比特编码子带是指分配的比特数为零的编码子带。 本发明可以很好地重构未编码的频域系数。

公开(公告)号：US20120323582A1

公开(公告)日：2012-12-20

申请号：US13580855

申请日：2011-01-12

申请人： Ke Peng ,  Guoming Chen ,  Hao Yuan ,  Dongping Jiang ,  Jiali Li

发明人： Ke Peng ,  Guoming Chen ,  Hao Yuan ,  Dongping Jiang ,  Jiali Li

IPC分类号： G10L21/00

CPC分类号： G10L19/24 ,  G10L19/025

摘要： Hierarchical audio coding and decoding method and system and hierarchical audio coding and decoding method for transient signals are provided. In the present invention, by introducing a processing method for transient signal frames in the hierarchical audio coding and decoding methods, a segmented time-frequency transform is performed on the transient signal frames, and then the frequency-domain coefficients obtained by transformation are rearranged respectively within the core layer and within the extended layer, so as to perform the same subsequent coding processes, such as bit allocation, frequency-domain coefficient coding, etc., as those on the steady-state signal frames, thus enhancing the coding efficiency of the transient signal frames and improving the quality of the hierarchical audio coding and decoding.

摘要翻译： 提供了分层音频编码和解码方法以及用于瞬态信号的系统和分层音频编码和解码方法。 在本发明中，通过在分层音频编码和解码方法中引入用于瞬态信号帧的处理方法，对瞬态信号帧执行分段时间频率变换，然后分别重新分配由变换获得的频域系数 在核心层内和扩展层内，进行与稳态信号帧相同的随后的编码处理，如比特分配，频域系数编码等，从而提高编码效率 瞬态信号帧和提高分层音频编码和解码的质量。

公开(公告)号：US08874450B2

公开(公告)日：2014-10-28

申请号：US13580855

申请日：2011-01-12

申请人： Ke Peng ,  Guoming Chen ,  Hao Yuan ,  Dongping Jiang ,  Jiali Li

发明人： Ke Peng ,  Guoming Chen ,  Hao Yuan ,  Dongping Jiang ,  Jiali Li

IPC分类号： G10L19/00 ,  G10L19/24 ,  G10L19/025

CPC分类号： G10L19/24 ,  G10L19/025

摘要： Hierarchical audio coding and decoding method and system and hierarchical audio coding and decoding method for transient signals are provided. In the present invention, by introducing a processing method for transient signal frames in the hierarchical audio coding and decoding methods, a segmented time-frequency transform is performed on the transient signal frames, and then the frequency-domain coefficients obtained by transformation are rearranged respectively within the core layer and within the extended layer, so as to perform the same subsequent coding processes, such as bit allocation, frequency-domain coefficient coding, etc., as those on the steady-state signal frames, thus enhancing the coding efficiency of the transient signal frames and improving the quality of the hierarchical audio coding and decoding.

摘要翻译： 提供了分层音频编码和解码方法以及用于瞬态信号的系统和分层音频编码和解码方法。 在本发明中，通过在分层音频编码和解码方法中引入用于瞬态信号帧的处理方法，对瞬态信号帧执行分段时间频率变换，然后分别重新分配由变换获得的频域系数 在核心层内和扩展层内，进行与稳态信号帧相同的随后的编码处理，如比特分配，频域系数编码等，从而提高编码效率 瞬态信号帧和提高分层音频编码和解码的质量。

公开(公告)号：US20130006645A1

公开(公告)日：2013-01-03

申请号：US13173367

申请日：2011-06-30

申请人： Dongping Jiang ,  Hao Yuan ,  Ke Peng ,  Guoming Chen ,  Jiali Li

发明人： Dongping Jiang ,  Hao Yuan ,  Ke Peng ,  Guoming Chen ,  Jiali Li

IPC分类号： G10L19/00

CPC分类号： G10L21/038 ,  G10L19/0204 ,  G10L19/0212 ,  G10L19/028 ,  H03M7/3082 ,  H03M7/4037

摘要： The present invention relates to a method and system for audio encoding and decoding and a method for estimating a noise level, and the method for estimating a noise level in the present invention comprises: estimating a power spectrum of an audio signal to be encoded according to a frequency domain coefficient of the audio signal to be encoded; and estimating a noise level of a zero bit encoding subband audio signal according to the power spectrum obtained by calculating, and this noise level for controlling an energy proportion of noise filling to spectral band replication during decoding; wherein a zero bit encoding subband refers to an encoding subband of which allocated bit number is zero. The present invention can well reconstruct the uncoded frequency domain coefficients.

摘要翻译： 本发明涉及一种用于音频编码和解码的方法和系统，以及用于估计噪声电平的方法，以及本发明的用于估计噪声电平的方法，该方法和系统包括：根据以下方式估计待编码的音频信号的功率谱： 要编码的音频信号的频域系数; 以及根据通过计算得到的功率谱估计零比特编码子带音频信号的噪声电平，并且该噪声电平用于在解码期间控制噪声填充到频谱带复制的能量比例; 其中零比特编码子带是指分配的比特数为零的编码子带。 本发明可以很好地重构未编码的频域系数。

公开(公告)号：US20120259644A1

公开(公告)日：2012-10-11

申请号：US13499534

申请日：2010-10-12

申请人： Zhibin Lin ,  Guoming Chen ,  Zheng Deng ,  Hao Yuan ,  Jiali Li ,  Ke Peng ,  Kaiwen Liu

发明人： Zhibin Lin ,  Guoming Chen ,  Zheng Deng ,  Hao Yuan ,  Jiali Li ,  Ke Peng ,  Kaiwen Liu

IPC分类号： G10L19/00

CPC分类号： H03M7/3082 ,  G10L19/0212 ,  G10L19/038 ,  H03M7/3059 ,  H03M7/3068 ,  H03M7/40 ,  H03M7/4018 ,  H03M7/70

摘要： The audio coding method and system of lattice vector quantization is provided in the invention. The method comprises: dividing frequency domain coefficients of an audio signal for which a modified discrete cosine transform (MDCT) has been performed into a plurality of coding sub-bands, and quantizing and coding an amplitude envelope value of each coding sub-band to obtain coded bits of amplitude envelopes; performing bit allocation on each coding sub-band, and performing normalization, quantization and coding respectively on vectors in a low bit coding sub-band with pyramid lattice vector quantization and on vectors in a high bit coding sub-band with sphere lattice vector quantization to obtain coded bits of the frequency domain coefficients; multiplexing and packing the coded bits of the amplitude envelope and the coded bits of the frequency domain coefficients of each coding sub-band, then sending them to a decoding side.

摘要翻译： 在本发明中提供了音频编码方法和格子矢量量化系统。 该方法包括：对已经执行了修正离散余弦变换（MDCT）的音频信号的频域系数进行分解为多个编码子带，并且对每个编码子带的幅度包络值进行量化和编码，以获得 编码位数的幅度包络; 对每个编码子带执行比特分配，并且分别对具有金字塔格子矢量量化的低位编码子带和具有球面格子矢量量化的高比特编码子带中的向量上的向量执行归一化，量化和编码 获得频域系数的编码位; 对每个编码子带的幅度包络的编码比特和频域系数的编码比特进行复用和打包，然后将它们发送到解码侧。

公开(公告)号：US08694325B2

公开(公告)日：2014-04-08

申请号：US13505064

申请日：2010-10-26

申请人： Zhibin Lin ,  Zheng Deng ,  Hao Yuan ,  Jing Lu ,  Xiaojun Qiu ,  Jiali Li ,  Guoming Chen ,  Ke Peng ,  Kaiwen Liu

发明人： Zhibin Lin ,  Zheng Deng ,  Hao Yuan ,  Jing Lu ,  Xiaojun Qiu ,  Jiali Li ,  Guoming Chen ,  Ke Peng ,  Kaiwen Liu

IPC分类号： G10L19/00 ,  G10L21/04 ,  G10L19/02 ,  G10L11/04

CPC分类号： H03M7/3082 ,  G10L19/002 ,  G10L19/0204 ,  G10L19/0212 ,  G10L19/028 ,  G10L19/038 ,  G10L19/24

摘要： A hierarchical audio coding, decoding method and system are provided. The method includes dividing frequency domain coefficients of an audio signal after MDCT into a plurality of coding sub-bands, quantizing and coding amplitude envelope values of coding sub-bands; allocating bits to each coding sub-band of the core layer, quantizing and coding core layer frequency domain coefficients to obtain coded bits of core layer frequency domain coefficients; calculating the amplitude envelope value of each coding sub-band of the core layer residual signal; allocating bits to each coding sub-band of the extended layer, quantizing and coding the extended layer coding signal to obtain coded bits of the extended layer coding signal; multiplexing and packing amplitude value envelope coded bits of each coding sub-band composed by core layer and extended layer frequency domain coefficients, core layer frequency coefficients coded bits, and extended layer coding signal coded bits, then transmitting to the decoding end.

摘要翻译： 提供分层音频编码，解码方法和系统。 该方法包括将MDCT之后的音频信号的频域系数划分为多个编码子带，对编码子带的幅度包络值进行量化和编码; 对核心层的每个编码子带分配比特，对核心层频域系数进行量化和编码，以获得核心层频域系数的编码比特; 计算核心层残余信号的每个编码子带的幅度包络值; 向扩展层的每个编码子带分配比特，对扩展层编码信号进行量化和编码，以获得扩展层编码信号的编码比特; 由核心层和扩展层频域系数组成的每个编码子带的振幅值包络编码比特，核心层频率系数编码比特和扩展层编码信号编码比特，然后发送到解码端。

公开(公告)号：US09015052B2

公开(公告)日：2015-04-21

申请号：US13499534

申请日：2010-10-12

申请人： Zhibin Lin ,  Guoming Chen ,  Zheng Deng ,  Hao Yuan ,  Jiali Li ,  Ke Peng ,  Kaiwen Liu

发明人： Zhibin Lin ,  Guoming Chen ,  Zheng Deng ,  Hao Yuan ,  Jiali Li ,  Ke Peng ,  Kaiwen Liu

IPC分类号： G10L19/00 ,  H03M7/30 ,  G10L19/038 ,  G10L19/02 ,  H03M7/40

CPC分类号： H03M7/3082 ,  G10L19/0212 ,  G10L19/038 ,  H03M7/3059 ,  H03M7/3068 ,  H03M7/40 ,  H03M7/4018 ,  H03M7/70

摘要： The audio coding method and system of lattice vector quantization is provided in the invention. The method comprises: dividing frequency domain coefficients of an audio signal for which a modified discrete cosine transform (MDCT) has been performed into a plurality of coding sub-bands, and quantizing and coding an amplitude envelope value of each coding sub-band to obtain coded bits of amplitude envelopes; performing bit allocation on each coding sub-band, and performing normalization, quantization and coding respectively on vectors in a low bit coding sub-band with pyramid lattice vector quantization and on vectors in a high bit coding sub-band with sphere lattice vector quantization to obtain coded bits of the frequency domain coefficients; multiplexing and packing the coded bits of the amplitude envelope and the coded bits of the frequency domain coefficients of each coding sub-band, then sending them to a decoding side.

摘要翻译： 在本发明中提供了音频编码方法和格子矢量量化系统。 该方法包括：对已经执行了修正离散余弦变换（MDCT）的音频信号的频域系数进行分解为多个编码子带，并且对每个编码子带的幅度包络值进行量化和编码，以获得 编码位数的幅度包络; 对每个编码子带执行比特分配，并且分别对具有金字塔格子矢量量化的低位编码子带和具有球面格子矢量量化的高比特编码子带中的向量上的向量执行归一化，量化和编码 获得频域系数的编码位; 对每个编码子带的幅度包络的编码比特和频域系数的编码比特进行复用和打包，然后将它们发送到解码侧。

公开(公告)号：US08731910B2

公开(公告)日：2014-05-20

申请号：US13382725

申请日：2010-02-25

申请人： Ming Wu ,  Zhibin Lin ,  Ke Peng ,  Zheng Deng ,  Jing Lu ,  Xiaojun Qiu ,  Jiali Li ,  Guoming Chen ,  Hao Yuan ,  Kaiwen Liu

发明人： Ming Wu ,  Zhibin Lin ,  Ke Peng ,  Zheng Deng ,  Jing Lu ,  Xiaojun Qiu ,  Jiali Li ,  Guoming Chen ,  Hao Yuan ,  Kaiwen Liu

IPC分类号： G10L21/00 ,  G10L19/02 ,  G10L19/00

CPC分类号： G10L19/005 ,  G10L19/0212

摘要： The invention provides a compensation method for audio frame loss in a MDCT domain, the method comprising: when a frame currently lost is a Pth frame, obtaining a set of frequencies to be predicted, and for each frequency in the set, using phases and amplitudes of a plurality of frames before a (P−1)th frame in a MDCT-MDST domain to predict a phase and an amplitude of the Pth frame, and using the predicted phase and amplitude to obtain a MDCT coefficient of the Pth frame at each corresponding frequency; for a frequency outside the set, using MDCT coefficients of a plurality of frames before the Pth frame to calculate a MDCT coefficient value of the Pth frame at the frequency; performing an IMDCT for the MDCT coefficients of the Pth frame to obtain a time domain signal of the Pth frame.

摘要翻译： 本发明提供了一种用于MDCT域中的音频帧丢失的补偿方法，该方法包括：当当前丢失的帧是第P帧时，获得要预测的一组频率，并且对于该组中的每个频率，使用相位和幅度 在MDCT-MDST域中的第（P-1）帧之前的多个帧中预测第P帧的相位和幅度，并且使用预测相位和幅度来获得每帧的第P帧的MDCT系数 相应频率; 对于所述组之外的频率，使用在所述第P帧之前的多个帧的MDCT系数来计算所述频率处的所述第P帧的MDCT系数值; 对第P帧的MDCT系数执行IMDCT以获得第P帧的时域信号。

公开(公告)号：US20120109659A1

公开(公告)日：2012-05-03

申请号：US13382725

申请日：2010-02-25

申请人： Ming Wu ,  Zhibin Lin ,  Ke Peng ,  Zheng Deng ,  Jing Lu ,  Xiaojun Qiu ,  Jiali Li ,  Guoming Chen ,  Hao Yuan ,  Kaiwen Liu

发明人： Ming Wu ,  Zhibin Lin ,  Ke Peng ,  Zheng Deng ,  Jing Lu ,  Xiaojun Qiu ,  Jiali Li ,  Guoming Chen ,  Hao Yuan ,  Kaiwen Liu

IPC分类号： H04B1/66

CPC分类号： G10L19/005 ,  G10L19/0212

摘要： The invention provides a compensation method for audio frame loss in a MDCT domain, the method comprising: when a frame currently lost is a Pth frame, obtaining a set of frequencies to be predicted, and for each frequency in the set, using phases and amplitudes of a plurality of frames before a (P−1)th frame in a MDCT-MDST domain to predict a phase and an amplitude of the Pth frame, and using the predicted phase and amplitude to obtain a MDCT coefficient of the Pth frame at each corresponding frequency; for a frequency outside the set, using MDCT coefficients of a plurality of frames before the Pth frame to calculate a MDCT coefficient value of the Pth frame at the frequency; performing an IMDCT for the MDCT coefficients of the Pth frame to obtain a time domain signal of the Pth frame.

摘要翻译： 本发明提供了一种用于MDCT域中的音频帧丢失的补偿方法，该方法包括：当当前丢失的帧是第P帧时，获得要预测的一组频率，并且对于该组中的每个频率，使用相位和幅度 在MDCT-MDST域中的第（P-1）帧之前的多个帧中预测第P帧的相位和幅度，并且使用预测相位和幅度来获得每帧的第P帧的MDCT系数 相应频率; 对于所述组之外的频率，使用在所述第P帧之前的多个帧的MDCT系数来计算所述频率处的所述第P帧的MDCT系数值; 对第P帧的MDCT系数执行IMDCT以获得第P帧的时域信号。