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。

公开(公告)号：US20130166308A1

公开(公告)日：2013-06-27

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

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

摘要： Provided is an encoder apparatus that can suppress the quality degradation of encoding processes. An ultimate selection candidate limiting unit (109) 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 (104); the CELP component suppressing unit (104) uses the designated suppression factors to generate a suppressed spectrum; a CELP residual signal spectrum calculating unit (105), to which the suppressed spectrum is input, calculates a residual spectrum; a conversion encoding unit (110) uses the residual spectrum to performs a second encoding process; and a distortion evaluating unit (112) 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： 提供了可以抑制编码处理的质量劣化的编码器装置。 最终选择候选限制单元（109）使用输入信号和残余频谱的频谱来将给定数量的预先选择的抑制因子指定给CELP分量抑制单元（104）; CELP分量抑制单元（104）使用指定的抑制因子来产生抑制的频谱; 输入抑制频谱的CELP残差信号频谱计算单元（105）计算剩余频谱; 转换编码单元（110）使用剩余频谱来执行第二编码处理; 并且失真评估单元（112）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产生的第二解码信号的频谱来确定所指定的抑制因子中的一个，并且还通过使用抑制的频谱和 输入信号。

公开(公告)号：US08422569B2

公开(公告)日：2013-04-16

申请号：US12863690

申请日：2009-01-23

申请人： Tomofumi Yamanashi ,  Masahiro Oshikiri

发明人： Tomofumi Yamanashi ,  Masahiro Oshikiri

IPC分类号： H04L27/00

CPC分类号： G10L19/0204 ,  G10L19/24 ,  G10L21/038

摘要： Provided is an encoding device which divides an input signal into a low-range component and a high-range component and encodes the components in separate encoding units. The encoding device can improve quality of a decoded signal. The encoding device (101) includes: a band division process unit (201) which subjects an input signal to a band division process so as to obtain a lower intermediate-range component lower than a first frequency and a high-range component higher than the first frequency; a low-range encoding unit (202) which suppresses a portion of the lower intermediate-range component higher than a second frequency so as to obtain a low-range component and encodes the low-range component so as to obtain low-range encoded information; an intermediate-range correction unit (203) corrects the intermediate-range component higher than the second frequency among the suppressed lower intermediate-range component so as to obtain a corrected intermediate-range component; an intermediate high-range encoding unit (204) which encodes the corrected intermediate-range component and the high-range component so as to obtain intermediate high-range encoded information; and a multiplexing unit (205) which multiplexes the low-range encoded information and the intermediate high-range encoded information so as to obtain encoded information.

摘要翻译： 提供了一种编码装置，其将输入信号分成低范围分量和高范围分量，并以分开的编码单位对分量进行编码。 编码装置可以提高解码信号的质量。 编码装置（101）包括：频带分割处理单元（201），其对输入信号进行频带分割处理，以获得低于比第一频率低的第一频率和高范围分量的较低中间范围分量 第一频率 低范围编码单元，其抑制低于第二频率的较低中间范围分量的一部分以获得低范围分量，并对低范围分量进行编码，以获得低范围编码信息 ; 中间范围校正单元（203）在被抑制的较低中间范围分量中校正高于第二频率的中间范围分量，以获得校正的中间范围分量; 中间高范围编码单元，其对所述校正的中间范围分量和所述高范围分量进行编码，以获得中间的高范围编码信息; 以及多路复用低范围编码信息和中间高范围编码信息以获得编码信息的复用单元（205）。

公开(公告)号：US20120296659A1

公开(公告)日：2012-11-22

申请号：US13521341

申请日：2011-01-13

申请人： Masahiro Oshikiri

发明人： Masahiro Oshikiri

IPC分类号： G10L19/12

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

摘要： Disclosed is an encoding device whereby it is possible to improve the quality of an encoded signal, even when encoding music signals. In the encoding device, a Code-Excited Linear Prediction (CELP) encoder (101) generates first encoded data by encoding an input signal, a CELP decoder (102) generates a decoded signal by decoding the first encoded data input from the CELP encoder (101), and a characteristic parameter encoder (106) 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： 公开了一种编码装置，即使编码音乐信号，也可以提高编码信号的质量。 在编码装置中，代码激励线性预测（CELP）编码器（101）通过对输入信号进行编码来生成第一编码数据，CELP解码器（102）通过解码从CELP编码器输入的第一编码数据产生解码信号 101），并且特征参数编码器（106）计算表示解码信号的频谱与输入信号之间的峰值分量和底层分量的比率的变动程度的参数。

公开(公告)号：US08311818B2

公开(公告)日：2012-11-13

申请号：US13367840

申请日：2012-02-07

申请人： Masahiro Oshikiri ,  Tomofumi Yamanashi

发明人： Masahiro Oshikiri ,  Tomofumi Yamanashi

IPC分类号： G10L19/02

CPC分类号： G10L19/0208 ,  G10L19/038 ,  G10L19/24

摘要： A transform coding apparatus includes an input scale factor calculating section that calculates an input scale factor having a predetermined number of scale factors associated with an input spectrum as an element, and a codebook that stores a plurality of scale factor candidates having a predetermined number of elements and outputs one scale factor candidate. The transform coding apparatus also includes an error calculating section that calculates an error on a per element basis, a weighted error calculating section that determines a weight on a per element basis and calculates a sum of products of the error and the weight to calculate a weighted error, and a searching section that searches for a scale factor candidate that minimizes the weighted error in the codebook.

摘要翻译： 变换编码装置包括：输入比例因子计算部分，其计算具有与输入频谱相关联的预定数量的比例因子作为元素的输入比例因子;以及码本，其存储具有预定数量的元素的多个比例因子候选 并输出一个比例因子候选。 变换编码装置还包括：以每个元素为基础计算误差的误差计算部，加权误差计算部，其基于每个元素确定权重，并计算误差和权重的乘积之和，以计算加权的 错误和搜索部分，其搜索使码本中的加权误差最小化的比例因子候选。

公开(公告)号：US20120209596A1

公开(公告)日：2012-08-16

申请号：US13502407

申请日：2010-10-19

申请人： Masahiro Oshikiri

发明人： Masahiro Oshikiri

IPC分类号： G10L19/00

CPC分类号： G10L19/06 ,  G10L19/02 ,  G10L19/025 ,  G10L19/24

摘要： Disclosed are an encoding device and a decoding device which suppress the occurrence of pre-echo artifacts and post-echo artifacts caused by a high layer having a low temporal resolution, and which implement high subjective quality encoding and decoding. An encoding device (100) carries out scalable coding comprising a low layer, and a high layer having a lower temporal resolution than that of the low layer. A start point detection unit (or end point detection unit) (150) determines the start point (or end point) of sections of the decoded low layer signal which have audio, and when the start point (or end point) is determined, a second layer encoding unit (160) selects a bandwidth to be excluded from encoding on the basis of the spectral energy from the decoded first layer signal, excludes the selected bandwidth, and encodes an error signal.

摘要翻译： 公开了一种编码装置和解码装置，其抑制由具有低时间分辨率的高层引起的预回波伪像和后回波伪影的发生，并且实现高主观质量编码和解码。 编码装置（100）执行包括低层的可分级编码和具有比低层低的时间分辨率的高层。 起始点检测单元（或终点检测单元）（150）确定具有音频的解码的低层信号的部分的起始点（或终点），以及当确定起始点（或终点）时， 第二层编码单元（160）根据来自解码的第一层信号的频谱能量选择要从编码中排除的带宽，排除所选择的带宽，并对错误信号进行编码。