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    • 91. 发明授权
    • Apparatus and method for encoding a signal as well as apparatus and method for decoding a signal
    • 用于编码信号的装置和方法以及用于对信号进行解码的装置和方法
    • US06681204B2
    • 2004-01-20
    • US09935931
    • 2001-08-23
    • Jun MatsumotoMasayuki NishiguchiKenichi Makino
    • Jun MatsumotoMasayuki NishiguchiKenichi Makino
    • G10L1902
    • G10L19/0212G10L19/0204G10L19/09
    • An apparatus and a method for encoding an input signal on the time base through orthogonal transform involves removing the correlation of signal waveform on the basis of the parameters obtained by means of linear predictive coding (LPC) analysis and pitch analysis of the input signal on the time base prior to the orthogonal transform. The time base input signal from input terminal is sent to a normalization circuit section and a LPC analysis circuit. The normalization circuit section removes the correlation of the signal waveform and takes out the residue by an LPC inverse filter and pitch inverse filter and sends the residue to an orthogonal transform circuit section. The LPC parameters from the LPC analysis circuit and the pitch parameters from the pitch analysis circuit are sent to a bit allocation calculation circuit. A coefficient quantization section quantizes the coefficients from the orthogonal transform circuit section according to the number of allocated bits from the bit allocation calculation section.
    • 通过正交变换在时基上对输入信号进行编码的装置和方法包括基于通过线性预测编码(LPC)分析获得的参数和对输入信号的音调分析来去除信号波形的相关性 在正交变换之前的时基。 来自输入端子的时基输入信号被发送到归一化电路部分和LPC分析电路。 归一化电路部分去除信号波形的相关性,并通过LPC逆滤波器和音调反向滤波器取出残差,并将其发送到正交变换电路部分。 来自LPC分析电路的LPC参数和来自音调分析电路的音调参数被发送到比特分配计算电路。 系数量化部根据来自比特分配计算部的分配比特数,对来自正交变换电路部的系数进行量化。
    • 94. 发明授权
    • Signal coding method and apparatus
    • 信号编码方法及装置
    • US6034632A
    • 2000-03-07
    • US48077
    • 1998-03-26
    • Jun MatsumotoMasayuki Nishiguchi
    • Jun MatsumotoMasayuki Nishiguchi
    • G10L19/00G06T9/00G10L19/02H03M7/30H03M7/00
    • G06T9/008G06T9/004G10L19/0212H03M7/3082
    • A signal coding apparatus including normalization circuit 101 for carrying out a linear prediction or the like to extract features of an input signal and for carrying out whitening. The signal whitened is transmitted to a T/F (time axis/frequency axis) conversion circuit 102 where the signal is subjected to a conversion such as the Modified Discrete Cosine Transform so as to obtain a coefficient y on the frequency axis. This coefficient y is supplied to a quantization (scalar quantization (SQ) and vector quantization (VQ)) circuit 103. A bit allocation circuit 104 uses the coefficient y and parameters such as a Linear Predictive Coding coefficient and a pitch from the normalization circuit 101 for carrying out quantization bit allocation for each coefficient. The quantization (SQ and VQ) circuit 103, according to this allocation bit, controls whether to carry out the SQ or VQ for each coefficient.
    • 一种信号编码装置,包括用于执行线性预测等的标准化电路101,以提取输入信号的特征并执行白化。 白化的信号被发送到T / F(时间轴/频率轴)转换电路102,其中信号经过诸如修正离散余弦变换的转换,以便在频率轴上获得系数y。 该系数y被提供给量化(标量量化(SQ)和矢量量化(VQ))电路103.比特分配电路104使用系数y和来自标准化电路101的线性预测编码系数和音调等参数 用于对每个系数执行量化比特分配。 根据该分配位的量化(SQ和VQ)电路103控制是否对每个系数执行SQ或VQ。
    • 98. 发明授权
    • Speech decoding method and apparatus for selecting random noise
codevectors as excitation signals for an unvoiced speech frame
    • 用于选择随机噪声码矢量作为无声语音帧的激励信号的语音解码方法和装置
    • US5909663A
    • 1999-06-01
    • US924142
    • 1997-09-05
    • Kazuyuki IijimaMasayuki NishiguchiJun Matsumoto
    • Kazuyuki IijimaMasayuki NishiguchiJun Matsumoto
    • G10L19/08G10L19/04H03M7/30G10L3/02
    • G10L19/005
    • If the same parameter is repeatedly used in an unvoiced frame inherently devoid of pitch, there is produced a pitch of the frame length period, thus producing an extraneous feeling. This can be prevented from occurring by evading repeated use of excitation vectors having the same waveform shape. To this end, when decoding an encoded speech signal obtained on waveform encoding an encoding-unit-based time-axis speech signal obtained on splitting an input speech signal in terms of a pre-set encoding unit on the time axis, input data is checked by CRC by a CRC and bad frame masking circuit 281, which processes a frame corrupted with an error with bad frame masking of repeatedly using parameters of a directly previous frame. If the error-corrupted frame is unvoiced, an unvoiced speech synthesis unit 220 adds the noise to an excitation vector from a noise codebook or randomly selects the excitation vector of the noise codebook.
    • 如果相同的参数被重复使用在固有地没有间距的无声帧中,则产生帧长度周期的间距,从而产生无关紧要的感觉。 可以通过避免重复使用具有相同波形形状的激励矢量来防止这种情况发生。 为此,当对在时间轴上按预设编码单位分割输入语音信号而获得的基于编码单元的时间轴语音信号的波形编码获得的编码语音信号进行解码时,检查输入数据 通过CRC通过CRC和坏帧屏蔽电路281,其处理使用直接前一帧的参数重复使用错误帧屏蔽的错误的帧。 如果错误帧被清音,则无声语音合成单元220将噪声加到来自噪声码本的激励矢量,或者随机选择噪声码本的激励矢量。
    • 99. 发明授权
    • Process for optically resolving 2-(3-benzoylphenyl) propionic acid
    • 光学拆分2-(3-苯甲酰基苯基)丙酸的方法
    • US5852209A
    • 1998-12-22
    • US897500
    • 1997-06-09
    • Hiroyuki NohiraShigeya SaijoMasafumi MoriwakiShunji KamiyamaKazutoshi ToyodaJun MatsumotoKohichi MaruoTaizo Fujimoto
    • Hiroyuki NohiraShigeya SaijoMasafumi MoriwakiShunji KamiyamaKazutoshi ToyodaJun MatsumotoKohichi MaruoTaizo Fujimoto
    • C07B57/00C07C51/487C07C57/38
    • C07C51/487
    • Provided is a process for separating (S)- or (R)-2-(3-benzoylphenyl)propionic acid from a mixture of (S)- and (R)-2-(3-benzoylphenyl)propionic acid, which comprises (1) reacting the mixture of (S)- and (R)-2-(3-benzoylphenyl)propionic acid with (S)- or (R)-3-methyl-2-phenylbutylamine in a suitable solvent to form a diastereomer salt of (S)-2-(3-benzoylphenyl)propionic acid with (S)-3-methyl-2-phenylbutylamine or a diastereomer salt of (R)-2-(3-benzoylphenyl)propionic acid with (R)-3-methyl-2-phenylbutylamine; (2) separating the diastereomer salt from the reaction mixture; and (3) liberating the separated diastereomer salt to give (S)- or (R)-2-(3-benzoylphenyl)propionic acid. According to the present process, it is possible to obtain optically active (S)- or (R)-2-(3-benzoylphenyl)propionic acid having 99% or more of high optical purity in a high yield. Thus, the present process is a practical and efficient process which can simplify purification steps and can be applied for an industrial production process.
    • 提供了从(S) - 和(R)-2-(3-苯甲酰基苯基)丙酸的混合物中分离(S) - 或(R)-2-(3-苯甲酰基苯基)丙酸的方法,其包括 1)使(S) - 和(R)-2-(3-苯甲酰基苯基)丙酸的混合物与(S) - 或(R)-3-甲基-2-苯基丁胺在合适的溶剂中反应以形成非对映异构体盐 (S)-2-(3-苯甲酰基苯基)丙酸与(S)-3-甲基-2-苯基丁胺或(R)-2-(3-苯甲酰基苯基)丙酸的非对映异构体盐与(R)-3 - 甲基-2-苯基丁胺; (2)从反应混合物中分离非对映异构体盐; (3)释放分离出的非对映体盐得到(S) - 或(R)-2-(3-苯甲酰基苯基)丙酸。 根据本方法,可以以高收率得到具有99%以上的光学纯度的光学活性(S) - 或(R)-2-(3-苯甲酰基苯基)丙酸。 因此,本方法是一种实用且有效的方法,可简化纯化步骤,可应用于工业生产过程。
    • 100. 发明授权
    • Voice encoding method and apparatus using modified discrete cosine
transform
    • 使用修正离散余弦变换的语音编码方法和装置
    • US5819212A
    • 1998-10-06
    • US736507
    • 1996-10-24
    • Jun MatsumotoShiro OmoriMasayuki NishiguchiKazuyuki Iijima
    • Jun MatsumotoShiro OmoriMasayuki NishiguchiKazuyuki Iijima
    • G10L19/02G10L19/04G10L19/07G10L9/00
    • G10L19/0212G10L19/0208G10L19/04G10L19/07
    • A method and apparatus for encoding an input signal, such as a broad-range speech signal, in which a number of decoding operations with different bit rates are enabled for assuring a high encoding bit rate and for minimizing deterioration of the reproduced sound even with a low bit rate. The signal encoding method includes a band-splitting step for splitting an input signal into a number of bands and a step of encoding signals of the bands in a different manner depending on signal characteristics of the bands. Specifically, a low-range side signal is taken out by a low-pass filter from an input signal entering a terminal, and analyzed for Linear Predictive coding by an Linear Predictive coding analysis quantization unit. After finding the Linear Predictive coding residuals, as short-term prediction residuals by an Linear Predictive coding inverted filter, the pitch is found by a pitch analysis circuit. Then, pitch residuals are found by long-term prediction by a pitch inverted filter. The pitch residuals are processed with modified discrete cosine transform by a modified discrete cosine transform (MDCT) circuit and vector-quantized by a vector-quantization circuit. The resulting quantization indices are transmitted along with the pitch lag and the pitch gain. The linear spectral pairs linear spectral pairs are also sent as parameter representing LPC coefficients.
    • 一种用于编码诸如宽范围语音信号的输入信号的方法和装置,其中能够使用不同比特率的多个解码操作用于确保高编码比特率,并且即使使用 低比特率。 信号编码方法包括用于将输入信号分割成多个频带的频带分解步骤和根据频带的信号特性以不同方式编码频带的信号的步骤。 具体地,通过低通滤波器从进入终端的输入信号中取出低范围侧信号,并通过线性预测编码分析量化单元分析线性预测编码。 在找到线性预测编码残差之后,通过线性预测编码反相滤波器作为短期预测残差,音调由音调分析电路找到。 然后,通过音调反向滤波器的长期预测来发现音调残差。 用经修正的离散余弦变换(MDCT)电路,用修正离散余弦变换处理音调残差,并由矢量量化电路进行矢量量化。 产生的量化索引与音调滞后和音调增益一起发送。 线性谱对线性谱对也作为表示LPC系数的参数发送。