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    • 1. 发明授权
    • Audio signal coding and decoding device
    • 音频信号编解码装置
    • US5511095A
    • 1996-04-23
    • US45426
    • 1993-04-13
    • Takeo InoueHideharu NishidaShozo SugishitaAkira Tsukihashi
    • Takeo InoueHideharu NishidaShozo SugishitaAkira Tsukihashi
    • H04B14/06
    • H04B14/068
    • The present invention relates to an audio signal coding and decoding device for coding and decoding an audio signal using an adaptive differential coding system. The audio signal coding and decoding device according to the present invention comprises an adaptive differential pulse code modulation coding device for coding an audio signal, an adaptive differential pulse code modulation decoding device for decoding the audio signal coded, an integrator provided in the preceding stage of the coding device and for decreasing the variation between unit samples of the input audio signal of the coding device, and a differentiator provided in the succeeding stage of the decoding device and for processing the audio signal decoded by the decoding device so that the variation decreased by the integrator is restored to the original one. Since the integrator is provided in the preceding stage of the coding device, the variation between the unit samples of the input audio signal of the coding device is decreased. Therefore, a prediction error signal obtained by the coding device is decreased. As a result, quantizer step-size is decreased, resulting in a reduced quantization error.
    • 本发明涉及一种使用自适应差分编码系统对音频信号进行编码和解码的音频信号编码和解码装置。 根据本发明的音频信号编码和解码装置包括用于对音频信号进行编码的自适应差分脉冲编码调制编码装置,用于对编码的音频信号进行解码的自适应差分脉冲编码调制解码装置,在前一级提供的积分器 编码装置,用于减少编码装置的输入音频信号的单元样本与解码装置的后级中提供的微分器之间的变化,并且用于处理由解码装置解码的音频信号,使得变化减小 集成商恢复原来的。 由于在编码装置的前级提供积分器,所以编码装置的输入音频信号的单位样本之间的变化减小。 因此,由编码装置获得的预测误差信号减小。 结果,量化器步长减小,导致量化误差降低。
    • 2. 发明授权
    • Compression/expansion method of time-scale of sound signal
    • 声音信号时间尺度的压缩/扩展方法
    • US5781885A
    • 1998-07-14
    • US888527
    • 1997-07-07
    • Takeo InoueShozo Sugishita
    • Takeo InoueShozo Sugishita
    • G10L21/04G10L5/02
    • G10L21/04
    • At a time of compression, two sound waveform segments each having single pitch length are cut-out from an input sound waveform at a time point represented by a current pointer and at a time point advanced from the time point by a single pitch period, respectively, and then, by adding the two sound waveform segments to each other after being multiplied by window functions, a single sound waveformn segment being compressed is produced. Next, the pointer is moved on the input sound waveform according to a compression rate, and then, a similar operation is repeated to produce a sound signal being compressed. At a time of expansion, two sound waveform segments each having double pitch length are cut-out from the sound waveform thus compressed at a time point represented by the current pointer and at a time point delayed from the time point by the single pitch period, respectively, and then, by adding the two sound wave segments to each other after being multiplied by window functions, a single synthesized sound wave form segment is obtained. Next, the pointer is moved on the sound waveform being compressed according to an expansion rate, and then, by repeating a similar operation, a sound signal being expanded is obtained.
    • 在压缩时,分别具有单个节距长度的两个声音波形段从由当前指针表示的时间点的输入声音波形和从时间点延迟单个音调周期的时间点分别切出 ,然后通过在乘以窗函数之后将两个声音波形段相加,产生被压缩的单个声音波形段。 接下来,根据压缩率将指针移动到输入声音波形上,然后重复类似的操作以产生被压缩的声音信号。 在扩展时,从由当前指针表示的时间点和从时间点延迟单个音调周期的时间点,从这样压缩的声音波形中切出两个具有双音调长度的声音波形段, 然后,通过在乘以窗函数之后将两个声波段相加,获得单个合成声波段。 接下来,将指针按照扩展速率在被压缩的声音波形上移动,然后通过重复类似的操作,获得正在扩展的声音信号。
    • 3. 发明授权
    • Process for producing spherical inorganic particle
    • 球形无机粒子的制造方法
    • US08117867B2
    • 2012-02-21
    • US11990485
    • 2006-08-09
    • Shigeo YamaguchiTakeo Inoue
    • Shigeo YamaguchiTakeo Inoue
    • C03B19/10C03B9/00C03B37/00
    • C03B19/102C01P2004/03C01P2004/32C09C1/28C09C3/006C09C3/041C09C3/043C09C3/12
    • A process for producing spherical inorganic particles which have high flowability, can be incorporated in a high proportion, and are useful as a filler for composite substrates such as printed wiring boards and encapsulating materials. Also provided is a process for producing spherical inorganic particles which have high flowability and can be incorporated in a high proportion and which are useful as a filler for encapsulating materials and give an encapsulating material having high electrical insulating properties. One of the processes for producing spherical inorganic particles comprises: (a1) pulverizing a silicate-containing inorganic material to form a pulverization product; (b1) heating the pulverization product in an atomized state to form the pulverization product into spherical particles; (c1) spraying water over the spherical particles to cool them while maintaining the atomized state of the spherical particles; and (d1) collecting the spherical particles. The other process, which is for producing spherical glass particles, comprises: a pulverization step in which a silicate-containing vitreous material is pulverized to form a pulverization product; an acid treatment step in which the pulverization product is contacted with an acid; and a sphering step in which the pulverization product is heated in a suspended state and formed into spherical particles.
    • 具有高流动性的球形无机颗粒的制造方法可以高比例地掺入,可用作印刷线路板和封装材料等复合基板的填料。 还提供了一种生产具有高流动性并且可以高比例地掺入的球形无机颗粒的方法,它可用作密封材料的填料,并得到具有高电绝缘性的封装材料。 生产球形无机颗粒的方法之一包括:(a1)粉碎含硅酸盐的无机材料以形成粉碎产物; (b1)以雾化状态加热粉碎物,形成粉碎物为球状粒子; (c1)在保持球状颗粒的雾化状态的同时将水喷洒在球形颗粒上以冷却它们; 和(d1)收集球形颗粒。 用于制造球形玻璃颗粒的另一方法包括:粉碎步骤,其中将含硅酸盐的玻璃质材料粉碎以形成粉碎产物; 酸处理步骤,其中所述粉碎产物与酸接触; 和粉碎产物在悬浮状态下加热并形成球形颗粒的纺丝步骤。
    • 4. 发明申请
    • Echo Prevention Circuit, Filter Coefficient Setting Method, and Recording Medium with Program Recorded
    • US20070205932A1
    • 2007-09-06
    • US11681643
    • 2007-03-02
    • Takeo InoueHideki OhashiYoshitaka Onaya
    • Takeo InoueHideki OhashiYoshitaka Onaya
    • H03M1/66
    • H04M9/082
    • An echo prevention circuit comprises a filter that is inputted with a first digital signal, the filter outputting second and third digital signals; a first DA converter that converts the second digital signal into a first analog signal and outputs the first analog signal; a second DA converter that converts the third digital signal into a second analog signal and outputs the second analog signal; an input/output terminal that outputs the first analog signal or that is inputted with a third analog signal; a subtracting circuit that outputs a fourth analog signal acquired by subtracting the second analog signal from a signal generated by combining the first analog signal and the third analog signal; an amplification circuit that amplifies the signal output from the subtracting circuit and outputs the amplified signal; an AD converter that converts the signal output from the amplification circuit into a digital signal and outputs the digital signal; a response signal acquiring unit that inputs a first signal to the first DA converter to acquire a first response signal from the input of the first DA converter to the output of the AD converter, the response signal acquiring unit inputting a second signal to the second DA converter to acquire a second response signal from the input of the second DA converter to the output of the AD converter; and a filter coefficient setting unit that sets filter coefficients to the filter based on the first and second response signals such that the fourth analog signal becomes a signal generated by removing or attenuating the first analog signal from the signal generated by combining the first analog signal and the third analog signal, the amplification circuit setting a gain to a first gain in response to a first control signal input before acquiring the first and second response signals, the amplification circuit setting the gain to a second gain larger than the first gain in response to a second control signal input after acquiring the first and second response signals.
    • 9. 发明授权
    • Echo preventing circuit and digital signal processing circuit
    • 回波防止电路和数字信号处理电路
    • US07358875B2
    • 2008-04-15
    • US11627839
    • 2007-01-26
    • Takeo InoueHideki Ohashi
    • Takeo InoueHideki Ohashi
    • H03M1/00
    • H04M9/082H04B3/23
    • An echo preventing circuit comprises a filter that is inputted with a first digital signal and outputs a second and a third digital signals; a first DA converter that converts the second digital signal into a first analog signal and outputs the first analog signal; a second DA converter that converts the third digital signal into a second analog signal and outputs the second analog signal; an input/output terminal that outputs the first analog signal or that is inputted with a third analog signal; a subtracting circuit that outputs a fourth analog signal obtained by subtracting the second analog signal from a signal formed by combining the first analog signal and the third analog signal; and an AD converter that converts the fourth analog signal into a fourth digital signal and outputs the fourth digital signal, wherein the filter sets filter coefficients for which the fourth analog signal is a signal formed by removing or attenuating the first analog signal from a signal formed by combining the first analog signal and the third analog signal, based on the fourth digital signal outputted from the AD converter when signals are inputted into the first and the second DA converters while the third analog signal is not present, and wherein the fourth analog signal outputted from the subtracting circuit is outputted as an output signal corresponding to the third analog signal.
    • 回波防止电路包括输入第一数字信号并输出​​第二和第三数字信号的滤波器; 第一DA转换器,将第二数字信号转换为第一模拟信号并输出​​第一模拟信号; 第二DA转换器,其将第三数字信号转换为第二模拟信号并输出​​第二模拟信号; 输出/输出端子,其输出第一模拟信号或输入第三模拟信号; 减法电路,输出从通过组合所述第一模拟信号和所述第三模拟信号而形成的信号中减去所述第二模拟信号而获得的第四模拟信号; 以及AD转换器,其将第四模拟信号转换为第四数字信号并输出​​第四数字信号,其中滤波器设置通过从形成的信号中去除或衰减第一模拟信号而形成的第四模拟信号的滤波器系数 当第三模拟信号不存在时,通过将第一模拟信号和第三模拟信号组合在基于从AD转换器输出的第四数字信号输入到第一和第二DA转换器中,并且其中第四模拟信号 输出从减法电路输出的与第三模拟信号对应的输出信号。
    • 10. 发明申请
    • Echo Preventing Circuit and Digital Signal Processing Circuit
    • 回波预防电路和数字信号处理电路
    • US20070176812A1
    • 2007-08-02
    • US11627839
    • 2007-01-26
    • Takeo InoueHideki Ohashi
    • Takeo InoueHideki Ohashi
    • H03M1/66
    • H04M9/082H04B3/23
    • An echo preventing circuit comprises a filter that is inputted with a first digital signal and outputs a second and a third digital signals; a first DA converter that converts the second digital signal into a first analog signal and outputs the first analog signal; a second DA converter that converts the third digital signal into a second analog signal and outputs the second analog signal; an input/output terminal that outputs the first analog signal or that is inputted with a third analog signal; a subtracting circuit that outputs a fourth analog signal obtained by subtracting the second analog signal from a signal formed by combining the first analog signal and the third analog signal; and an AD converter that converts the fourth analog signal into a fourth digital signal and outputs the fourth digital signal, wherein the filter sets filter coefficients for which the fourth analog signal is a signal formed by removing or attenuating the first analog signal from a signal formed by combining the first analog signal and the third analog signal, based on the fourth digital signal outputted from the AD converter when signals are inputted into the first and the second DA converters while the third analog signal is not present, and wherein the fourth analog signal outputted from the subtracting circuit is outputted as an output signal corresponding to the third analog signal.
    • 回波防止电路包括输入第一数字信号并输出​​第二和第三数字信号的滤波器; 第一DA转换器,将第二数字信号转换为第一模拟信号并输出​​第一模拟信号; 第二DA转换器,其将第三数字信号转换为第二模拟信号并输出​​第二模拟信号; 输出/输出端子,其输出第一模拟信号或输入第三模拟信号; 减法电路,输出从通过组合所述第一模拟信号和所述第三模拟信号而形成的信号中减去所述第二模拟信号而获得的第四模拟信号; 以及AD转换器,其将第四模拟信号转换为第四数字信号并输出​​第四数字信号,其中滤波器设置通过从形成的信号中去除或衰减第一模拟信号而形成的第四模拟信号的滤波器系数 当第三模拟信号不存在时,通过将第一模拟信号和第三模拟信号组合在基于从AD转换器输出的第四数字信号输入到第一和第二DA转换器中,并且其中第四模拟信号 输出从减法电路输出的与第三模拟信号对应的输出信号。