公开(公告)号：US08352258B2

公开(公告)日：2013-01-08

申请号：US12517956

申请日：2007-12-12

申请人： Tomofumi Yamanashi ,  Masahiro Oshikiri

发明人： Tomofumi Yamanashi ,  Masahiro Oshikiri

IPC分类号： G10L21/00

CPC分类号： G10L19/0204 ,  G10L19/0212 ,  G10L19/038 ,  G10L19/083 ,  G10L19/24

摘要： An encoding device includes: a frequency region converter which converts an inputted audio signal into a frequency region; a band selector which selects a quantization object band from a plurality of sub bands obtained by dividing the frequency region; and a shape quantizer which quantizes the shape of the frequency region parameter of the quantization object band. When a prediction encoding presence/absence determiner determines that the number of common sub bands between the quantization object band and the quantization object band selected in the past is not smaller than a predetermined value, a gain quantizer performs prediction encoding on the gain of the frequency region parameter of the quantization object band. When the number of common sub bands is smaller than the predetermined value, the gain quantizer non-predictively encodes the gain of the frequency region parameter of the quantization object band.

摘要翻译： 编码装置包括：频率区域转换器，其将输入的音频信号转换成频率区域; 频带选择器，其从通过划分频率区域获得的多个子频带中选择量化对象频带; 以及量化量化对象带的频域参数的形状的形状量化器。 当预测编码存在/不存在确定器确定量化对象带和过去选择的量化对象带之间的公共子带的数量不小于预定值时，增益量化器对频率的增益执行预测编码 量化对象带的区域参数。 当公共子带的数量小于预定值时，增益量化器对量化对象带的频域参数的增益进行非预测编码。

公开(公告)号：US08135588B2

公开(公告)日：2012-03-13

申请号：US12089985

申请日：2006-10-13

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 coder leading to reduction of degradation of perceptual sound quality even if an adequate number of bits is not assigned. Candidates of a correction scale factor stored in a correction scale factor codebook are outputted one by one, and an error signal is generated by subjecting the candidate and scale factors outputted from scale factor computing sections to a predetermined operation. A judging section determines a weight vector given to a weighted error computing section depending on the sign of the error signal. The weighted error computing section computes the square of the error signal, multiplies the square of the error signal by the weight vector given from the judging section and computes a weighted squared error E. A search section determines the candidates of the correction scale factor which minimizes the weighted squared error E by a closed loop processing.

摘要翻译： 即使没有分配足够数量的比特，导致感知声音质量降低的变换编码器也是如此。 存储在校正比例因子码本中的校正比例因子的候选者一个接一个地输出，并且通过将从比例因子计算部输出的候选和比例因子进行预定的操作来产生误差信号。 判定部根据误差信号的符号来确定给予加权误差运算部的加权矢量。 加权误差计算部分计算误差信号的平方，将误差信号的平方乘以由判定部分给出的权重向量，并计算加权平方误差E.搜索部分确定最小化的校正比例因子的候选 加权平方误差E通过闭环处理。

公开(公告)号：US20100284455A1

公开(公告)日：2010-11-11

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： H04B1/66

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：US20100280833A1

公开(公告)日：2010-11-04

申请号：US12808505

申请日：2008-12-26

申请人： Tomofumi Yamanashi ,  Masahiro Oshikiri

发明人： Tomofumi Yamanashi ,  Masahiro Oshikiri

IPC分类号： G10L19/00

CPC分类号： G10L21/038 ,  G10L19/24

摘要： Provided is an encoding device which can suppress quality degradation of a decoded signal in a band extension for estimating a high range from a low range of a decoded signal. The encoding device includes: a first layer encoding unit (202) which encodes the low-range portion of an input signal to generate first encoded information; a first layer decoding unit (203) which decodes the first encoded information to generate a decoded signal; a second layer encoding unit (206) which estimates a high-range portion of the input signal from the decoded signal so as to generate an estimated signal and generate second encoded information to obtain the estimated signal; a peak feature analysis unit (207) which obtains a difference in a wave adjustment structure between the high-range portion of the input signal and the estimated signal or the low-range portion of the input signal; and an encoding information multiplexing unit (208) which integrates the first encoded information, the second encoded information, and the difference in the wave adjustment structure.

摘要翻译： 提供了一种编码装置，其可以抑制用于从解码信号的低范围估计高范围的频带扩展中的解码信号的质量劣化。 编码装置包括：第一层编码单元，其对输入信号的低范围部分进行编码以产生第一编码信息; 第一层解码单元，其对所述第一编码信息进行解码以生成解码信号; 第二层编码单元，其从解码信号估计输入信号的高范围部分，以产生估计信号，并产生第二编码信息以获得估计信号; 峰值特征分析单元，其获得输入信号的高范围部分与输入信号的估计信号或低范围部分之间的波调整结构的差; 以及对第一编码信息，第二编码信息和波形调整结构中的差分进行积分的编码信息复用单元（208）。

公开(公告)号：US20100017199A1

公开(公告)日：2010-01-21

申请号：US12521039

申请日：2007-12-26

申请人： Masahiro Oshikiri ,  Tomofumi Yamanashi

发明人： Masahiro Oshikiri ,  Tomofumi Yamanashi

IPC分类号： G10L19/00

CPC分类号： H03M7/30 ,  G10L19/005 ,  G10L19/0208

摘要： Provided is a decoding device and others which can mitigate the spectrum energy discontinuity and improves the decoded signal quality even when a sub-band is subjected to a spectrum attenuation process in the band extension method. The device includes: a substitution unit (181) which substitutes a second layer decoding spectrum of the sub-band indicated by the sub-band information with a third layer decoding error spectrum of the sub-band indicated by the sub-band information; and an adjusting unit (185) which makes an adjustment so that the energy of the second layer decoding spectrum after the substitution approaches the energy of the spectrum before the replacement.

摘要翻译： 提供了一种解码装置等，即使在频带扩展方法中进行频谱衰减处理时，也可以减轻频谱能量不连续性并提高解码信号质量。 该装置包括：替换单元，其用子带信息指示的子带的第三层解码误差频谱代替由子带信息指示的子带的第二层解码频谱; 以及调整单元（185），其进行调整，使得所述替换之后的第二层解码频谱的能量接近所述更换之前的频谱的能量。