公开(公告)号：US20100017198A1

公开(公告)日：2010-01-21

申请号：US12518371

申请日：2007-12-14

申请人： Tomofumi Yamanashi ,  Masahiro Oshikiri

发明人： Tomofumi Yamanashi ,  Masahiro Oshikiri

IPC分类号： G10L19/00

CPC分类号： G10L19/24 ,  G10L21/038

摘要： Disclosed is a decoding device and others capable of flexibly calculating high-band spectrum data with a high accuracy in accordance with an encoding band selected by an upper-node layer of the encoding side. In this device: a first layer decoding unit (202) decodes first layer encoded information to generate a first layer decoded signal; a second layer decoding unit (204) decodes second layer encoded information to generate a second layer decoded signal; a spectrum decoding unit (205) performs a band extension process by using the second layer decoded signal and the first layer decoded signal up-sampled in an up-sampling unit (203) so as to generate a all-band decoded signal; and a switch (206) outputs the first layer decoded signal or the all-band decoded signal according to the control information generated in a control unit (201).

摘要翻译： 公开了一种能够根据由编码侧的上层节点选择的编码频带，以高精度灵活地计算高频谱数据的解码装置等。 在该设备中：第一层解码单元（202）解码第一层编码信息以产生第一层解码信号; 第二层解码单元（204）对第二层编码信息进行解码以产生第二层解码信号; 频谱解码单元（205）通过使用第二层解码信号和在上采样单元（203）中被上采样的第一层解码信号来执行频带扩展处理，以便产生全频带解码信号; 开关（206）根据在控制单元（201）中生成的控制信息输出第一层解码信号或全频带解码信号。

公开(公告)号：US20080255833A1

公开(公告)日：2008-10-16

申请号：US11576264

申请日：2005-09-28

申请人： Michiyo Goto ,  Koji Yoshida ,  Hiroyuki Ehara ,  Masahiro Oshikiri

发明人： Michiyo Goto ,  Koji Yoshida ,  Hiroyuki Ehara ,  Masahiro Oshikiri

IPC分类号： G10L19/12

CPC分类号： G10L19/008 ,  G10L19/24

摘要： A scalable encoding device for realizing scalable encoding by CELP encoding of a stereo sound signal and improving the encoding efficiency. In this device, an adder and a multiplier obtain an average of a first channel signal CH1 and a second channel signal CH2 as a monaural signal M. A CELP encoder for a monaural signal subjects the monaural signal M to CELP encoding, outputs the obtained encoded parameter to outside, and outputs a synthesized monaural signal M′ synthesized by using the encoded parameter to a first channel signal encoder. By using the synthesized monaural signal M′ and the second channel signal CH2, the first channel signal encoder subjects the first channel signal CH1 to CELP encoding to minimize the sum of the encoding distortion of the first channel signal CH1 and the encoding distortion of the second channel signal CH2.

摘要翻译： 一种可扩展编码装置，用于通过立体声信号的CELP编码实现可分级编码，并提高编码效率。 在该装置中，加法器和乘法器获得第一信道信号CH 1和第二信道CH 2的平均值作为单声道信号M.用于单声道信号的CELP编码器使单声道信号M进行CELP编码， 获得编码参数到外部，并且将通过使用编码参数合成的合成单声道信号M'输出到第一声道信号编码器。 通过使用合成单声道信号M'和第二声道信号CH 2，第一声道信号编码器对第一声道信号CH 1进行CELP编码，使第一声道信号CH 1的编码失真和编码失真的和最小化 的第二信道信号CH 2。

公开(公告)号：US20080126082A1

公开(公告)日：2008-05-29

申请号：US11718437

申请日：2005-11-02

申请人： Hiroyuki Ehara ,  Masahiro Oshikiri ,  Koji Yoshida

发明人： Hiroyuki Ehara ,  Masahiro Oshikiri ,  Koji Yoshida

IPC分类号： G10L19/00

CPC分类号： G10L21/038 ,  G10L19/24

摘要： A scalable decoding apparatus capable of providing decoded audio signals of high quality having less degradation of a high frequency spectrum even when decoding audio signals by generating the high frequency spectrum by use of a low frequency spectrum. In the apparatus, an amplitude adjusting part (1211) uses different adjustment coefficients in accordance with the characteristic of first layer spectrum information to adjust the amplitude of a first layer decoded signal spectrum, and then outputs the amplitude-adjusted first layer decoded signal spectrum to a pseudo-spectrum generating part (1012). Using amplitude-adjusted first layer decoded signal spectrum received from the amplitude adjusting part (1211), the pseudo-spectrum generating part (1012) generates and outputs a pseudo-spectrum of high frequencies to a scaling part (1013). The scaling part (1013) scales the spectrum received from the pseudo-spectrum generating part (1012) and then outputs it to an adder (B).

摘要翻译： 即使在通过使用低频谱生成高频谱来解码音频信号的同时，也能够提供具有较低的高频谱劣化的高质量解码音频信号的可扩展解码装置。 在该装置中，振幅调整部（1211）根据第一层频谱信息的特性使用不同的调整系数来调整第一层解码信号频谱的振幅，然后将经调幅的第一层解码信号频谱输出到 伪频谱生成部（1012）。 使用从振幅调整部（1211）接收到的经调幅的第一层解码信号频谱，伪频谱生成部（1012）生成并将高频的伪频谱输出到缩放部（1013）。 缩放部分（1013）缩放从伪频谱生成部分（1012）接收的频谱，然后将其输出到加法器（B）。

公开(公告)号：US06704702B2

公开(公告)日：2004-03-09

申请号：US09726562

申请日：2000-12-01

申请人： Masahiro Oshikiri ,  Kimio Miseki ,  Masami Akamine

发明人： Masahiro Oshikiri ,  Kimio Miseki ,  Masami Akamine

IPC分类号： G10L1104

CPC分类号： G10L25/93 ,  G10L19/09 ,  G10L25/78

摘要： A speech encoding method, apparatus and program wherein an input speech signal is divided into a plurality of frames each having a predetermined length, each of the frames is subdivided into a plurality of subframes, a predictive pitch period of a subframe in a to-be-encoded current frame is obtained by using pitch periods of at least two frames of the current frame and past and future frames with respect to the current frame; a pitch period of a subframe in the current frame is obtained by using the predictive pitch period, a relative pitch pattern codebook storing a plurality of relative pitch patterns representing fluctuations in pitch periods of a plurality of subframes is prepared, and a change in pitch period of plural subframes is expressed with one relative pitch pattern selected from the relative pitch pattern codebook.

摘要翻译： 一种语音编码方法，装置和程序，其中输入语音信号被划分为具有预定长度的多个帧，每个帧被细分为多个子帧，子帧的预测音调周期 通过使用当前帧的至少两帧的音调周期和相对于当前帧的过去和未来帧来获得编码的当前帧; 通过使用预测音调周期来获得当前帧中的子帧的音调周期，准备存储表示多个子帧的音调周期的波动的多个相对音调模式的相对音调模式码本，并且音调周期的变化 由相对的音调图案码本中选择的一个相对音调图形来表示多个子帧。

公开(公告)号：US6167375A

公开(公告)日：2000-12-26

申请号：US39317

申请日：1998-03-16

申请人： Kimio Miseki ,  Masahiro Oshikiri ,  Tadashi Amada ,  Masami Akamine

发明人： Kimio Miseki ,  Masahiro Oshikiri ,  Tadashi Amada ,  Masami Akamine

IPC分类号： G10L19/00 ,  G10L19/02

CPC分类号： G10L19/012 ,  G10L19/02

摘要： A method for encoding speech wherein an input speech signal is separated by a component separator into a first component mainly constituted by speech and a second component mainly constituted by a background noise at each predetermined unit of time, a bit allocation selector selects bit allocation for each component based on the first and second components from among a plurality of predetermined candidates for bit allocation, a speech encoder and a noise encoder encode the first and second components from the component separator based on the bit allocation according to predetermined different methods for encoding, and a multiplexer multiplexes encoded data of the first and second components and information on the bit allocation and outputs them as transmitted encoded data.

摘要翻译： 一种编码语音的方法，其中输入语音信号由分量分离器分离成主要由语音构成的第一分量和主要由每个预定单位时间的背景噪声构成的第二分量，比特分配选择器选择每个 基于来自用于比特分配的多个预定候选中的第一和第二分量的分量，语音编码器和噪声编码器根据预定的不同编码方法基于比特分配对来自分量分离器的第一和第二分量进行编码，以及 复用器复用第一和第二分量的编码数据和关于比特分配的信息，并将其作为发送的编码数据输出。

公开(公告)号：US09264094B2

公开(公告)日：2016-02-16

申请号：US14123841

申请日：2012-05-25

申请人： Katsunori Daimou ,  Masahiro Oshikiri ,  Hiroyuki Ehara

发明人： Katsunori Daimou ,  Masahiro Oshikiri ,  Hiroyuki Ehara

IPC分类号： G10L19/00 ,  H04B1/66 ,  G10L19/24 ,  G10L19/02 ,  G10L21/038

CPC分类号： H04B1/667 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/24 ,  G10L21/038

摘要： A voice coding device capable of preventing overall quality degradation even when the bit rate for coding is lowered. The voice coding device codes a wide band signal in a first layer, and codes an extended band signal whose frequency band is located in higher frequency than the wide band signal in an extended band layer. An adaptive band selection unit (301) selects a frequency band to be excluded from a coding object in the extended band layer or a frequency band whose energy is to be attenuated in the extended band layer. A band-limited signal generation unit (302) excludes, within the frequency band of an input signal, the frequency band selected by the adaptive band selection unit (301) from the coding object, or attenuates the energy of the frequency band selected by the adaptive band selection unit (301).

摘要翻译： 即使当编码的比特率降低时，能够防止整体质量劣化的语音编码装置。 语音编码装置对第一层中的宽带信号进行编码，并且对扩展频带信号进行编码，其频带位于比扩频带中的宽带信号更高的频带。 自适应频带选择单元（301）从扩展频带层中的编码对象或能量在扩展频带层中衰减的频带中选择要排除的频带。 频带限制信号生成单元（302）在输入信号的频带内从编码对象排除由自适应频带选择部（301）选择的频带，或者衰减由所述编码对象选择的频带的能量 自适应频带选择单元（301）。

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：US09053701B2

公开(公告)日：2015-06-09

申请号：US13203449

申请日：2010-02-25

申请人： Masahiro Oshikiri

发明人： Masahiro Oshikiri

IPC分类号： G10L19/008 ,  H04S1/00

CPC分类号： G10L19/008 ,  H04S1/007 ,  H04S2420/03 ,  H04S2420/07

摘要： Provided is a channel signal generation device capable of avoiding a decrease in the prediction performance for predicting an L channel signal and an R channel signal from a monaural signal and achieving encoding with high sound quality. In the device, a monaural MDCT coefficient corrector (301) generates a left channel change monaural MDCT coefficient and a right channel change monaural MDCT coefficient using a decoding monaural MDCT coefficient generated using a left channel signal and a right channel signal, which constitute an acoustic signal. More specifically, the monaural MDCT coefficient corrector (301) generates the left channel change monaural MDCT coefficient and the right channel change monaural MDCT coefficient by performing change processing for compensating for the phase difference between the left channel signal and the right channel signal on the decoding monaural MDCT coefficient according to inputted determination data.

摘要翻译： 提供一种能够避免用于从单声道信号预测L信道信号和R信道信号的预测性能的降低并实现高音质编码的信道信号生成装置。 在该设备中，单声道MDCT系数校正器（301）使用使用左声道信号和右声道信号产生的解码单声道MDCT系数来生成左声道改变单声道MDCT系数和右声道改变单声道MDCT系数，其构成声学 信号。 更具体地，单声道MDCT系数校正器（301）通过执行改变处理来产生左声道改变单声道MDCT系数和右声道改变单声道MDCT系数，用于在解码时补偿左声道信号和右声道信号之间的相位差 单声道MDCT系数根据输入的确定数据。

公开(公告)号：US08977546B2

公开(公告)日：2015-03-10

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 ,  G10L19/06 ,  G10L19/02 ,  G10L19/24 ,  G10L19/025

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。

公开(公告)号：US20140200901A1

公开(公告)日：2014-07-17

申请号：US14238041

申请日：2012-08-24

申请人： Takuya Kawashima ,  Katsunori Daimou ,  Masahiro Oshikiri

发明人： Takuya Kawashima ,  Katsunori Daimou ,  Masahiro Oshikiri

IPC分类号： G10L19/26

CPC分类号： G10L19/265 ,  G10L19/0204 ,  G10L21/0388

摘要： By copying to a high-frequency band portion (extension band) a low-frequency band portion in which peaking has been set to a sufficiently low state, this encoding device is capable of preventing generation of a spectrum with overly high peaking in the high-frequency band portion, and of generating a high-quality extension band spectrum. This device comprises: a maximum value search unit which searches, in each of multiple sub-bands obtained by dividing the low-frequency band portion of an audio signal and/or music signal below a prescribed frequency, for the maximum value of the amplitude of a first spectrum obtained by decoding first encoded data, which is encoded data in the low-frequency band portion; and an amplitude normalization unit which obtains a normalized spectrum by normalizing, at the maximum values of the amplitude of each sub-band, the first spectrum contained in each sub-band.

摘要翻译： 通过将峰值设定为足够低的低频区域的低频带部分（扩展频带）复制到该高频带部分（扩展频带），该编码装置能够防止高频带部分 频带部分，并且产生高质量的扩展频带。 该装置包括：最大值搜索单元，其在通过将音频信号的低频带部分和/或音频信号低于规定频率的下划线获得的多个子带中搜索最大值的幅度的最大值 通过对作为低频带部分中的编码数据的第一编码数据进行解码而获得的第一频谱; 以及振幅归一化单元，其通过在每个子带的振幅的最大值处归一化包含在每个子带中的第一频谱来获得归一化频谱。