-
公开(公告)号：US6064962A
公开(公告)日：2000-05-16
申请号：US713356
申请日：1996-09-13
摘要： In a formant emphasis method of emphasizing the formant as the spectral peak of an input speech signal and attenuating the spectral valley of the input speech signal, a spectrum emphasis filter performs processing for emphasizing the formant of the input speech signal and attenuating the valley of the input speech signal. A first-order variable characteristic filter whose characteristic adaptively changes in accordance with the characteristic of the input speech signal and a first-order fixed characteristic filter compensate a spectral tilt included in an output signal from the spectrum emphasis filter.
摘要翻译： 在强调共振峰作为输入语音信号的频谱峰值并衰减输入语音信号的频谱谷的共振峰强调方法中，频谱加重滤波器执行用于强调输入语音信号的共振峰并衰减输入语音信号的谷值的处理 输入语音信号。 其特征根据输入语音信号的特性自适应地改变的一阶可变特征滤波器和一阶固定特性滤波器对包括在来自频谱加重滤波器的输出信号中的频谱倾斜进行补偿。
-
102.发明授权Coding apparatus having adaptive coding at different bit rates and pitch emphasis 失效编码装置具有不同比特率的自适应编码和音调强调
公开(公告)号：US5878387A
公开(公告)日：1999-03-02
申请号：US537276
申请日：1995-09-29
申请人： Masahiro Oshikiri , Kimio Miseki , Masami Akamine , Tadashi Amada
发明人： Masahiro Oshikiri , Kimio Miseki , Masami Akamine , Tadashi Amada
CPC分类号： G10L19/005 , G10L19/06 , G10L19/09
摘要： The coding apparatus comprises an adaptive codebook storing excitation signals as vectors, a synthesis filter for forming a synthesis signal, referring to the vectors stored in the adaptive codebook, a similarity computation circuit for computing a similarity between the synthesis signal obtained by the synthesis filter and a target signal, and a coding scheme determining circuit for deciding one coding scheme from a plurality of coding schemes respectively having coding bit rates different from each other, on the basis of the similarity obtained by the similarity computation circuit.
摘要翻译： 编码装置包括存储作为向量的激励信号的自适应码本，用于形成合成信号的合成滤波器，参考存储在自适应码本中的矢量，相似度计算电路，用于计算由合成滤波器获得的合成信号与 目标信号和编码方案决定电路，用于根据由相似度计算电路获得的相似度，从分别具有彼此不同的编码比特率的多个编码方案中确定一个编码方案。
-
公开(公告)号：US5671327A
公开(公告)日：1997-09-23
申请号：US7710
申请日：1993-01-22
申请人： Masami Akamine , Masahiro Oshikiri , Kimio Miseki
发明人： Masami Akamine , Masahiro Oshikiri , Kimio Miseki
CPC分类号： G10L19/12
摘要： A learning-type speech encoding apparatus comprises an adaptive code book storing driving signal vectors, a minimum distortion searching circuit for searching the adaptive code book for an optimum driving signal vector on the basis of the input speech signal, a synthesizing filter for synthesizing a speech signal using the optimum driving signal vector retrieved, a buffer for storing the optimum driving signal vector retrieved, a training vector creating section for producing a training vector by segmenting the stored driving signal vector in units of a specified length, and a learning section for learning by constantly updating the driving signal vectors in the code book on the basis of the training vector.
摘要翻译： 一种学习型语音编码装置，包括存储驱动信号矢量的自适应码本，用于基于输入的语音信号搜索自适应码本以获得最佳驱动信号向量的最小失真搜索电路，用于合成语音的合成滤波器 使用所检索的最佳驱动信号矢量的信号，用于存储所检索的最佳驱动信号矢量的缓冲器，用于通过以指定长度为单位分割存储的驾驶信号向量来产生训练矢量的训练矢量创建部分，以及用于学习的学习部分 通过基于训练矢量不断更新码本中的驾驶信号矢量。
-
104.发明授权Speech/audio encoding apparatus, speech/audio decoding apparatus, and methods thereof 有权语音/音频编码装置，语音/音频解码装置及其方法公开(公告)号：US09536534B2
公开(公告)日：2017-01-03
申请号：US14001977
申请日：2012-03-19
CPC分类号： G10L19/002 , G10L19/0208 , G10L19/035 , G10L19/06 , G10L19/12
摘要： Provided is a speech/audio encoding apparatus with which it is possible to code a significant frequency domain region with high precision, and to enable high audio quality. A speech/audio encoding apparatus codes a linear prediction coefficient. A significant frequency domain region detection unit identifies a frequency domain region which is aurally significant from the linear prediction coefficient. A frequency domain region repositioning unit repositions the significant frequency domain region which is identified by the significant frequency domain region detection unit. A bit allocation computation unit determines a coding bit allocation on the basis of the significant frequency domain region which is repositioned by the frequency domain region repositioning unit.
摘要翻译： 提供了一种语音/音频编码装置，其可以以高精度对重要的频域区域进行编码，并且能够实现高音频质量。 语音/音频编码装置对线性预测系数进行编码。 显着的频域区域检测单元从线性预测系数识别听觉显着的频域区域。 频域区域重新定位单元重新定位由有效频域区域检测单元识别的显着频域区域。 比特分配计算单元基于由频域区域重定位单元重定位的有效频域区域来确定编码比特分配。
-
公开(公告)号：US09111527B2
公开(公告)日：2015-08-18
申请号：US13318552
申请日：2010-05-19
申请人： Masahiro Oshikiri
发明人： Masahiro Oshikiri
IPC分类号： G10L19/008
CPC分类号： G10L19/008
摘要： An encoding device, a decoding device, and encoding and decoding methods are provided, wherein when a multi-channel signal is encoded with high efficiency, using an adaptive filter, the number of arithmetic operations to update a filter coefficient of the adaptive filter can be reduced. An update range determination unit determines the range of a filter coefficient order (update order range) of a filter coefficient to be updated, among filter coefficients gk(n) of the adaptive filter, on the basis of a mutual correlation function between an input (L) signal and an input (R) signal. The adaptive filter updates the filter coefficient gk(n) of the filter coefficient order (n) to be updated, using a decoding (L) signal and a decoding error (R) signal.
摘要翻译： 提供了一种编码装置，解码装置以及编码和解码方法，其中当使用自适应滤波器以高效率对多信道信号进行编码时，更新自适应滤波器的滤波器系数的算术运算的数量可以是 减少 更新范围确定单元基于自适应滤波器的滤波器系数gk（n）中的相互相关函数来确定要更新的滤波器系数的滤波器系数顺序（更新顺序范围）的范围， L）信号和输入（R）信号。 自适应滤波器使用解码（L）信号和解码误差（R）信号来更新要更新的滤波器系数序列（n）的滤波器系数g k（n）。
-
公开(公告)号：US08760323B2
公开(公告)日：2014-06-24
申请号：US13822823
申请日：2011-09-07
摘要： An encoding device enables the amount of processing operations to be significantly reduced while minimizing deterioration in the quality of an output signal. This encoding device (101) encodes an input signal by determining the correlation between a first signal generated by using the input signal and a second signal generated by a predetermined method. An importance assessment unit (202) sets the importance of each of a plurality of processing units obtained by dividing the frames of the input signal. A CELP coder (203) performs sparse processing in which the amplitude value of a predetermined number of samples among multiple samples constituted by the first signal and/or the second signal in each processing unit is set to zero according to the importance that was set for each processing unit, and calculates the correlation between the first signal and the second signal, either of which was subjected to sparse processing.
摘要翻译： 编码装置使得可以显着减少处理操作量，同时最小化输出信号质量的劣化。 该编码装置（101）通过确定通过使用输入信号产生的第一信号和通过预定方法产生的第二信号之间的相关性来对输入信号进行编码。 重要性评估单元（202）设置通过划分输入信号的帧而获得的多个处理单元中的每个处理单元的重要性。 CELP编码器（203）执行稀疏处理，其中根据为每个处理单元中的第一信号和/或第二信号构成的多个样本中的预定数量样本的振幅值被设置为零，根据为 每个处理单元，并且计算第一信号和第二信号之间的相关性，其中任一个都进行稀疏处理。
-
107.发明授权Spectral smoothing device, encoding device, decoding device, communication terminal device, base station device, and spectral smoothing method 有权光谱平滑装置，编码装置，解码装置，通信终端装置，基站装置和光谱平滑方法公开(公告)号：US08731909B2
公开(公告)日：2014-05-20
申请号：US13057454
申请日：2009-08-07
CPC分类号： G10L19/0204 , G10L19/0212 , G10L19/032 , G10L19/24 , G10L21/02
摘要： Disclosed is a spectral smoothing device with a structure whereby smoothing is performed after a nonlinear conversion has been performed for a spectrum calculated from an audio signal, and with which the amount of processing calculation is significantly reduced while maintaining excellent audio quality. With this spectral smoothing device, a sub band division unit (102) divides an input spectrum into multiple sub bands; a representative value calculation unit (103) calculates a representative value for each sub band using an arithmetic mean and a geometric mean; with respect to each representative value, a nonlinear conversion unit (104) performs a nonlinear conversion the characteristic of which is further emphasized as the value increases; and a smoothing unit (105) that smoothes the representative value which has undergone the nonlinear conversion for each sub band, at the frequency domain.
摘要翻译： 公开了一种光谱平滑装置，其具有在对从音频信号计算出的频谱进行非线性转换之后进行平滑处理，并且在保持优良音频质量的同时显着减少处理计算量的结构。 利用该频谱平滑装置，子带分割单元（102）将输入频谱划分成多个子频带; 代表值计算单元（103）使用算术平均值和几何平均值计算每个子带的代表值; 对于每个代表值，非线性转换单元（104）执行非线性转换，其特性随着值的增加被进一步强调; 以及平滑化单元（105），其以频域对每个子带进行了非线性转换的代表值进行平滑化。
-
公开(公告)号：US08660851B2
公开(公告)日：2014-02-25
申请号：US13322202
申请日：2010-05-25
IPC分类号： G10L19/008
CPC分类号： G10L19/005 , G10L19/008
摘要： A decoding device reduces abrupt changes in the number of channels in a decoded signal when transmission errors occur as a result of lost frames in an encoding/decoding system for multichannel signals. In the device, a demultiplexer receives an encoded monaural signal and an encoded differential signal and detects change over time in the received encoded differential signal. An M signal decoder decodes the encoded monaural signal and obtains a decoded monaural signal. An S signal decoder decodes the encoded differential signal and obtains a decoded differential signal. A smoothing unit performs smoothing on the decoded differential signal by means of a computation involving the decoded differential signal and coefficients corresponding to the change over time detected by the demultiplexer. An L/R signal computation unit computes a decoded stereo signal from the decoded monaural signal and the smoothed decoded differential signal.
摘要翻译： 由于多通道信号的编码/解码系统中的丢失帧的结果，当传输错误发生时，解码装置减少解码信号中的信道数量的突然变化。 在该装置中，解复用器接收经编码的单声道信号和经编码的差分信号，并检测接收到的编码差分信号中随时间的变化。 M信号解码器解码编码的单声道信号并获得解码的单声道信号。 S信号解码器对编码的差分信号进行解码并获得解码的差分信号。 平滑单元通过涉及解码的差分信号的计算和对应于由解复用器检测到的随时间变化的系数对解码的差分信号进行平滑处理。 L / R信号计算单元从解码的单声道信号和平滑的解码的差分信号计算解码的立体声信号。
-
109.发明授权公开(公告)号：US08554549B2
公开(公告)日：2013-10-08
申请号：US12528659
申请日：2008-02-29
IPC分类号： G10L19/12
CPC分类号： G10L19/00 , G10L19/005 , G10L19/02 , G10L19/0208 , G10L19/038 , G10L19/083 , G10L19/24 , G10L25/18
摘要： A voice encoding device accurately encodes a spectrum shape of a signal having a strong tonality such as a vowel. The device includes: a sub-band divider which divides a first layer error conversion coefficient to be encoded into M sub-bands so as to generate M sub-band conversion coefficients; a shape vector encoder which performs encoding on each of the M sub-band conversion coefficients so as to obtain M shape encoded information and calculates a target gain of each of the M sub-band conversion coefficients; a gain vector former which forms one gain vector by using M target gains; a gain vector encoder which encodes the gain vector so as to obtain gain encoded information; and a multiplexer which multiplexes the shape encoded information with the gain encoded information.
摘要翻译： 语音编码装置对具有强音调的信号（例如元音）的频谱形状进行精确编码。 该装置包括：子带分割器，将要编码的第一层错误转换系数分成M个子带，以产生M个子带转换系数; 形状矢量编码器，对M个子带变换系数中的每一个进行编码，以获得M个形状的编码信息，并计算M个子带转换系数中的每一个的目标增益; 通过使用M个目标增益形成一个增益矢量的增益矢量前者; 增益矢量编码器，其对所述增益矢量进行编码，以获得增益编码信息; 以及多路复用器，其将形状编码信息与增益编码信息进行复用。
-
110.发明申请STEREO SIGNAL ENCODING DEVICE, STEREO SIGNAL DECODING DEVICE, STEREO SIGNAL ENCODING METHOD, AND STEREO SIGNAL DECODING METHOD 有权立体声信号编码装置，立体信号解码装置，立体声信号编码方法和立体声信号解码方法公开(公告)号：US20130223633A1
公开(公告)日：2013-08-29
申请号：US13882750
申请日：2011-10-17
申请人： Masahiro Oshikiri , Hiroyuki Ehara
发明人： Masahiro Oshikiri , Hiroyuki Ehara
IPC分类号： G10L19/008
CPC分类号： G10L19/008 , G10L19/22
摘要： Provided is a stereo signal encoding device that enables a lower bitrate without decreasing quality when applying an intermittent transmission technique to a stereo signal. A stereo encoding unit (103) generates first stereo encoded data by encoding the stereo signal when the stereo signal of the current frame is an audio section A stereo DTX encoding unit (104) is a means for encoding the stereo signal when the stereo signal of the current frame is a non-audio section, and generates second stereo encoded data by encoding each of: a monaural signal spectral parameter that is a spectral parameter of a monaural signal generated using the first channel signal and the second channel signal; first channel signal information relating to the first channel signal; and second channel signal information relating to the second channel signal.
摘要翻译： 提供了一种立体声信号编码装置，当将间歇传输技术应用于立体声信号时，能够实现较低的比特率而不降低质量。 立体声编码单元（103）当当前帧的立体声信号是音频部分A时通过对立体声信号进行编码来产生第一立体声编码数据。立体声DTX编码单元（104）是当立体声信号的立体声信号 当前帧是非音频部分，并且通过编码以下各项来生成第二立体声编码数据：单声道信号频谱参数，其是使用第一信道信号和第二信道信号产生的单声道信号的频谱参数; 与第一信道信号相关的第一信道信号信息; 以及与第二信道信号相关的第二信道信号信息。
-
-
-
-
-
-
-
-
-
搜索结果
138 条记录 (耗时 0.023 秒)
