公开(公告)号：US09240192B2

公开(公告)日：2016-01-19

申请号：US13807129

申请日：2011-07-06

申请人： Zongxian Liu ,  Masahiro Oshikiri

发明人： Zongxian Liu ,  Masahiro Oshikiri

IPC分类号： G10L19/12 ,  G10L19/02 ,  G10L19/038

CPC分类号： G10L19/12 ,  G10L19/0208 ,  G10L19/038

摘要： This invention introduces apparatus and methods to efficiently encode the quantization parameters of split multi-rate lattice vector quantization. In this invention, by doing spectral analysis on the split multi-rate vector quantized spectrum, the spectrum is split to null vectors region and non-null vectors region. For the null vectors region, instead of transmitting series of indication for null vectors, an indication of null vectors region and the quantized value of index of the ending vector in the null vectors region (or the number of the null vectors in the null vectors region) are transmitted. The indication of null vectors region can be designed in many ways, the only requirement is the indication should be distinguishable in the decoder side. The ending index or the number of null vectors can be quantized by an adaptively designed codebook. By applying of the invented method, some bits can be saved from the codebook indications.

摘要翻译： 本发明引入了对分割多速率格子矢量量化的量化参数进行有效编码的装置和方法。 在本发明中，通过对分割的多速率矢量量化频谱进行频谱分析，将频谱分解为零矢量区域和非空矢量区域。 对于空矢量区域，不是发送空矢量的一系列指示，空向量区域的指示和空向量区域中的结束向量的索引的量化值（或空向量区域中的零向量的数量） ）被传送。 空向量区域的指示可以以多种方式设计，唯一的要求是在解码器侧应该区分指示。 结束索引或空向量的数量可以通过自适应设计的码本进行量化。 通过应用本发明的方法，可以从码本指示中保存一些比特。

公开(公告)号：US20140114651A1

公开(公告)日：2014-04-24

申请号：US14008732

申请日：2012-03-12

申请人： Zongxian Liu ,  Kok Seng Chong ,  Masahiro Oshikiri

发明人： Zongxian Liu ,  Kok Seng Chong ,  Masahiro Oshikiri

IPC分类号： G10L19/032

CPC分类号： G10L19/032 ,  G10L19/0017 ,  G10L19/0208 ,  G10L19/0212

摘要： In this invention, the design of the Huffman table can be done offline with a large input sequence database. The range of the quantization indices (or differential indices) for Huffman coding is identified. For each value of range, all the input signal which have the same range will be gathered and the probability distribution of each value of the quantization indices (or differential indices) within the range is calculated. For each value of range, one Huffman table is designed according to the probability. And in order to improve the bits efficiency of the Huffman coding, apparatus and methods to reduce the range of the quantization indices (or differential indices) are also introduced.

摘要翻译： 在本发明中，霍夫曼表的设计可以用大的输入序列数据库离线完成。 识别霍夫曼编码的量化指标（或差分指数）的范围。 对于每个范围值，将收集具有相同范围的所有输入信号，并计算该范围内的量化索引（或差分索引）的每个值的概率分布。 对于每个范围值，根据概率设计一个霍夫曼表。 并且为了提高霍夫曼编码的比特效率，还引入了缩小量化指标（或差分索引）的范围的装置和方法。

公开(公告)号：US20130173275A1

公开(公告)日：2013-07-04

申请号：US13822810

申请日：2011-09-14

申请人： Zongxian Liu ,  Kok Seng Chong ,  Masahiro Oshikiri

发明人： Zongxian Liu ,  Kok Seng Chong ,  Masahiro Oshikiri

IPC分类号： G10L19/06

CPC分类号： G10L19/06 ,  G10L19/0212 ,  G10L19/24

摘要： Provided is an audio encoding device that can suppress degradation of audio quality. Spectral coefficients of synthesized signal from CELP core layer are utilized to fulfill spectral gaps in error signal spectrum coefficients from a transform coding layer. By both spectral coefficients, decoded signal spectral coefficients are generated. The decoded signal spectral coefficients and the input signal spectral coefficients are divided into a plurality of sub bands. In each sub band, the energy of the input signal spectral coefficient corresponding to a zero decoded error signal spectral coefficient is calculated, and the energy of the decoded signal spectral coefficient corresponding to the zero decoding error signal spectral coefficient is calculated, and their energy ratio is calculated and is quantized and transmitted.

摘要翻译： 提供了可以抑制音频质量劣化的音频编码装置。 利用来自CELP核心层的合成信号的频谱系数来实现来自变换编码层的误差信号频谱系数中的频谱间隙。 通过两个频谱系数，生成解码信号频谱系数。 解码信号频谱系数和输入信号频谱系数被分成多个子频带。 在每个子带中，计算与零解码误差信号频谱系数相对应的输入信号频谱系数的能量，并且计算与零解码误差信号频谱系数对应的解码信号频谱系数的能量，并且其能量比 被计算并被量化和传输。

公开(公告)号：US20130103394A1

公开(公告)日：2013-04-25

申请号：US13807129

申请日：2011-07-06

申请人： Zongxian Liu ,  Masahiro Oshikiri

发明人： Zongxian Liu ,  Masahiro Oshikiri

IPC分类号： G10L19/12

CPC分类号： G10L19/12 ,  G10L19/0208 ,  G10L19/038

摘要： This invention introduces apparatus and methods to efficiently encode the quantization parameters of split multi-rate lattice vector quantization. In this invention, by doing spectral analysis on the split multi-rate vector quantized spectrum, the spectrum is split to null vectors region and non-null vectors region. For the null vectors region, instead of transmitting series of indication for null vectors, an indication of null vectors region and the quantized value of index of the ending vector in the null vectors region (or the number of the null vectors in the null vectors region) are transmitted. The indication of null vectors region can be designed in many ways, the only requirement is the indication should be distinguishable in the decoder side. The ending index or the number of null vectors can be quantized by an adaptively designed codebook. By applying of the invented method, some bits can be saved from the codebook indications.

摘要翻译： 本发明引入了对分割多速率格子矢量量化的量化参数进行有效编码的装置和方法。 在本发明中，通过对分割的多速率矢量量化频谱进行频谱分析，将频谱分解为零矢量区域和非空矢量区域。 对于空矢量区域，不是发送空矢量的一系列指示，空向量区域的指示和空向量区域中的结束向量的索引的量化值（或空向量区域中的零向量的数量） ）被传送。 空向量区域的指示可以以多种方式设计，唯一的要求是在解码器侧应该区分指示。 结束索引或空向量的数量可以通过自适应设计的码本进行量化。 通过应用本发明的方法，可以从码本指示中保存一些比特。

公开(公告)号：US09881625B2

公开(公告)日：2018-01-30

申请号：US14008732

申请日：2012-03-12

申请人： Zongxian Liu ,  Kok Seng Chong ,  Masahiro Oshikiri

发明人： Zongxian Liu ,  Kok Seng Chong ,  Masahiro Oshikiri

IPC分类号： G10L19/032 ,  G10L19/02 ,  G10L19/00

CPC分类号： G10L19/032 ,  G10L19/0017 ,  G10L19/0208 ,  G10L19/0212

摘要： In this invention, the design of the Huffman table can be done offline with a large input sequence database. The range of the quantization indices (or differential indices) for Huffman coding is identified. For each value of range, all the input signal which have the same range will be gathered and the probability distribution of each value of the quantization indices (or differential indices) within the range is calculated. For each value of range, one Huffman table is designed according to the probability. And in order to improve the bits efficiency of the Huffman coding, apparatus and methods to reduce the range of the quantization indices (or differential indices) are also introduced.

公开(公告)号：US09361892B2

公开(公告)日：2016-06-07

申请号：US13820760

申请日：2011-09-05

申请人： Takuya Kawashima ,  Masahiro Oshikiri

发明人： Takuya Kawashima ,  Masahiro Oshikiri

IPC分类号： G10L19/00 ,  G10L19/24 ,  G10L19/02 ,  G10L19/12 ,  G10L19/20

CPC分类号： G10L19/00 ,  G10L19/0212 ,  G10L19/12 ,  G10L19/20 ,  G10L19/24

摘要： An encoder apparatus is provided that suppresses the quality degradation of encoding processes. An ultimate selection candidate limiting unit uses the spectrum of an input signal and a residual spectrum to designate a given number of pre-selected suppression factors to a CELP component suppressing unit, which uses the designated suppression factors to generate a suppressed spectrum. A CELP residual signal spectrum calculating unit, to which the suppressed spectrum is input, calculates a residual spectrum. A conversion encoding unit uses the residual spectrum to perform a second encoding process. A distortion evaluating unit determines one of the designated suppression factors by use of the spectrum of a second decoded signal generated by decoding a second code obtained by the second encoding process, and further by use of the suppressed spectrum and the spectrum of the input signal.

摘要翻译： 提供了一种编码器装置，其抑制编码处理的质量劣化。 最终选择候选限制单元使用输入信号和残余频谱的频谱来将给定数量的预选抑制因子指定给CELP分量抑制单元，其使用指定的抑制因子来产生抑制频谱。 抑制频谱被输入的CELP残差信号频谱计算单元计算剩余频谱。 转换编码单元使用剩余频谱来执行第二编码处理。 失真评估单元通过使用通过对通过第二编码处理获得的第二代码进行解码而生成的第二解码信号的频谱，并且进一步通过使用抑制的频谱和输入信号的频谱来确定指定的抑制因子之一。

公开(公告)号：US09082412B2

公开(公告)日：2015-07-14

申请号：US13702382

申请日：2011-05-27

申请人： Takuya Kawashima ,  Masahiro Oshikiri

发明人： Takuya Kawashima ,  Masahiro Oshikiri

IPC分类号： G10L21/00 ,  G10L21/034 ,  G10L19/22 ,  G10L19/12 ,  G10L19/02 ,  G10L19/24

CPC分类号： G10L21/034 ,  G10L19/0204 ,  G10L19/0212 ,  G10L19/12 ,  G10L19/22 ,  G10L19/24

摘要： Disclosed is a decoder capable of improving the sound quality of a decoded sound signal in an encoding method which combines speech encoding and music encoding in a hierarchical structure. A transform-encoding decoding unit (202) decodes transform-encoded data to generate a spectrum of a decoded transform-encoded signal. A band decision unit (203) uses the spectrum of the decoded transform-encoded signal to decide whether each of a plurality of bands in which frequency components of an input signal are divided constitute a first band in which a transform encoded pulse is not established or a second band in which said pulse is established. A CELP component suppression unit (207) suppresses the spectrum of a CELP decoded signal, which is the frequency component of a decoded signal of CELP encoded data, to the extent that suppression in the first band is weaker than suppression in the second band.

摘要翻译： 公开了一种解码器，其能够以分层结构组合语音编码和音乐编码的编码方法来提高解码声音信号的声音质量。 变换编码解码单元（202）对变换编码数据进行解码，生成解码变换编码信号的频谱。 频带判定单元（203）使用解码后的变换编码信号的频谱来判定输入信号的频率成分被划分的多个频带中的每一个是否构成未建立变换编码脉冲的第一频带， 其中建立所述脉冲的第二频带。 CELP分量抑制单元（207）抑制作为CELP编码数据的解码信号的频率分量的CELP解码信号的频谱，使得第一频带的抑制弱于第二频带中的抑制。

公开(公告)号：US08924208B2

公开(公告)日：2014-12-30

申请号：US13521112

申请日：2011-01-12

申请人： Tomofumi Yamanashi ,  Masahiro Oshikiri

发明人： Tomofumi Yamanashi ,  Masahiro Oshikiri

IPC分类号： G10L19/02 ,  G10L19/032

CPC分类号： G10L19/0208 ,  G10L19/032

摘要： An encoding device and encoding method improve a quality of a decoded signal under very low bit rate conditions using a small amount of computation. A spectrum corrector performs correction processing on a subspectrum in each subband in such a manner that samples equal to or greater than a subspectrum average value are left unchanged and samples smaller than the subspectrum average value are replaced by zero. As a result of this, it is possible to significantly reduce the number of bits required to quantize the subspectrums without a substantial reduction in quality in a local searcher and in a multi-rate indexer.

摘要翻译： 编码装置和编码方法使用少量的计算在非常低的比特率条件下提高解码信号的质量。 频谱校正器以等于或大于子频谱平均值的样本保持不变并且将小于子频谱平均值的样本替换为零的方式对每个子带中的子频谱进行校正处理。 因此，可以显着地减少量化子频段所需的位数，而不会在本地搜索器和多速率分度器中显着降低质量。

公开(公告)号：US08898053B2

公开(公告)日：2014-11-25

申请号：US13318951

申请日：2010-05-21

申请人： Masahiro Oshikiri

发明人： Masahiro Oshikiri

IPC分类号： G10L19/00 ,  G10L19/005 ,  G10L19/02 ,  G10L19/24

CPC分类号： G10L19/005 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/0208 ,  G10L19/24

摘要： An encoding device, a decoding device, and related methods are provided that eliminate the loss of synchronization of the adaptive filters of a terminal at the encoding end and a terminal at the decoding end caused by transmission errors. Deterioration of the sound quality is suppressed when a multiple channel signal is encoded with high efficiency using an adaptive filter. In the terminal at the encoding end, a buffer stores updated filter coefficients. When packet loss detection information indicating whether there is any packet loss in the terminal at the decoding end indicates that there is packet loss, a switch outputs the past filter coefficients of the previous (NX+1) frames from the buffer to an adaptive filter. The adaptive filter uses the past filter coefficients of the previous (NX+1) frames to conduct filtering.

摘要翻译： 提供了一种编码装置，解码装置和相关方法，其消除了编码端的终端的自适应滤波器与由传输错误引起的解码端的终端的同步丢失。 当使用自适应滤波器以高效率编码多声道信号时，抑制了声音质量的恶化。 在编码端的终端中，缓冲器存储更新的滤波器系数。 当指示在解码端的终端中是否存在任何分组丢失的分组丢失检测信息指示存在分组丢失时，交换机将先前（NX + 1）帧的过去滤波器系数从缓冲器输出到自适应滤波器。 自适应滤波器使用先前（NX + 1）帧的过去滤波器系数进行滤波。

公开(公告)号：US08892428B2

公开(公告)日：2014-11-18

申请号：US13521341

申请日：2011-01-13

申请人： Masahiro Oshikiri

发明人： Masahiro Oshikiri

IPC分类号： G10L19/26 ,  G10L19/24 ,  G10L19/12 ,  G10L19/02

CPC分类号： G10L19/12 ,  G10L19/0212 ,  G10L19/24 ,  G10L19/26

摘要： An encoding device is provided for increasing the quality of an encoded signal, even when encoding music signals. In the encoding device, a Code-Excited Linear Prediction (CELP) encoder generates first encoded data by encoding an input signal, and a CELP decoder generates a decoded signal by decoding the first encoded data input from the CELP encoder. Additionally, a characteristic parameter encoder calculates a parameter that expresses the degree of fluctuation in the ratio of the peak components and the floor components between the spectra of the decoded signal and the input signal.

摘要翻译： 提供编码装置，用于提高编码信号的质量，即使对音乐信号进行编码。 在编码装置中，码激励线性预测（CELP）编码器通过对输入信号进行编码来生成第一编码数据，并且CELP解码器通过解码从CELP编码器输入的第一编码数据来产生解码信号。 另外，特征参数编码器计算表示解码信号的频谱与输入信号之间的峰值成分和底层成分的比例的变动程度的参数。