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    • 1. 发明授权
    • Method and apparatus for removing image noise
    • 去除图像噪声的方法和装置
    • US08611680B2
    • 2013-12-17
    • US12745011
    • 2008-11-11
    • Yutaka YamamotoMasaaki NagaharaAkira Kobayashi
    • Yutaka YamamotoMasaaki NagaharaAkira Kobayashi
    • G06K9/36G06K9/40
    • H04N19/117H04N19/14H04N19/176H04N19/436H04N19/86
    • An FFT analysis is performed on the decoded image data of one frame, and a cutoff frequency based on the assumption that the original signal has first-order attenuation characteristics is obtained in both the horizontal and vertical directions. A sampled-data H∞ filter (digital filter), previously designed to have different parameters corresponding to different cutoff frequencies is selected. By using this filter, a filtering process is performed on the image data decoded both in the horizontal and vertical directions. Since the variety of the analog frequency characteristics of the original image is taken into account for every frame of the image, the information that seems to be noise in the original image is less likely to be removed, and mosquito noise and block noise associated with a coding/decoding process can be efficiently removed.
    • 对一帧的解码图像数据执行FFT分析,并且基于在水平和垂直方向上获得原始信号具有一阶衰减特性的假设的截止频率。 选择先前设计为具有对应于不同截止频率的不同参数的采样数据H∞滤波器(数字滤波器)。 通过使用该滤波器,对在水平方向和垂直方向上解码的图像数据进行滤波处理。 由于对于图像的每一帧考虑了原始图像的模拟频率特性的多样性,原始图像中似乎是噪声的信息不太可能被去除,并且与a相关联的蚊式噪声和块噪声 可以有效地去除编码/解码过程。
    • 2. 发明授权
    • Method for designing audio signal processing system for hearing aid, audio signal processing system for hearing aid, and hearing aid
    • 用于助听器的音频信号处理系统,助听器的音频信号处理系统和助听器的设计方法
    • US08488823B2
    • 2013-07-16
    • US13057286
    • 2009-08-03
    • Yutaka YamamotoMasaaki Nagahara
    • Yutaka YamamotoMasaaki Nagahara
    • H04R25/00
    • H04R25/353H04R25/356H04R2225/43
    • A hearing aid tailored to a hard-of-hearing person is designed using sampled-data control theory. The method is for designing an audio signal processing system for a hearing aid, wherein the system comprises an AD converter for converting an analog audio input signal (yc) inputted to the hearing aid into a digital audio input signal, a hearing aid digital filter (K(z)) for performing a signal processing on the digital audio input signal outputted from the AD converter, and a DA converter for converting a digital signal outputted from the hearing aid digital filter into an analog audio output signal to be outputted to the hard-of-hearing person. The hearing aid digital filter (K(z)) is designed according to sampled-data control theory so as to reduce an error (ec) occurring between: a restored analog signal (zc) obtained from filtering the analog audio output signal outputted from the DA converter through an analog filter (P(s)) that has characteristics corresponding to auditory characteristics of the hard-of-hearing person; and the analog audio signal (yc) inputted to the hearing aid.
    • 使用采样数据控制理论设计了针对难听者的助听器。 该方法用于设计用于助听器的音频信号处理系统,其中该系统包括用于将输入到助听器的模拟音频输入信号(yc)转换为数字音频输入信号的AD转换器,助听器数字滤波器 K(z)),用于对从AD转换器输出的数字音频输入信号执行信号处理;以及DA转换器,用于将从助听数字滤波器输出的数字信号转换为模拟音频输出信号,以输出到硬 听力人。 助听器数字滤波器(K(z))根据采样数据控制原理进行设计,以减少在以下情况之间发生的恢复的模拟信号(zc):从滤波器输出的模拟音频输出信号 DA转换器通过模拟滤波器(P(s))具有对应于难听者的听觉特征的特征; 和输入到助听器的模拟音频信号(yc)。
    • 4. 发明申请
    • METHOD AND APPARATUS FOR REMOVING IMAGE NOISE
    • 用于去除图像噪声的方法和装置
    • US20110002552A1
    • 2011-01-06
    • US12745011
    • 2008-11-26
    • Yutaka YamamotoMasaaki NagaharaAkira Kobayashi
    • Yutaka YamamotoMasaaki NagaharaAkira Kobayashi
    • G06K9/36
    • H04N19/117H04N19/14H04N19/176H04N19/436H04N19/86
    • An FFT analysis is performed to the image data of one frame which has been decoded, and a cutoff frequency on the assumption that the original signal has first-order attenuation characteristics is obtained each in the horizontal direction and in the vertical direction. A sampled-data H∞ filter (digital filter) which has been previously designed in such a manner as to have different parameters corresponding to different cutoff frequencies is selected. By using this filter, a filtering process is performed to the image data which has been decoded both in the horizontal direction and in the vertical direction. Since the variety of the analog frequency characteristics of the original image is taken into account for every frame of image, the information that seems to be a noise yet actually exists in the original image is less likely to be removed, and a mosquito noise and block noise associated with a coding/decoding process can be efficiently removed.
    • 对已经解码的一帧的图像数据执行FFT分析,并且假定在水平方向和垂直方向上都获得了原始信号具有一阶衰减特性的截止频率。 选择先前以具有对应于不同截止频率的不同参数设计的采样数据H∞滤波器(数字滤波器)。 通过使用该滤波器,对在水平方向和垂直方向上解码的图像数据进行滤波处理。 由于对于每一帧图像都考虑了原始图像的模拟频率特性的多样性,原始图像中实际上仍然存在噪声的信息不太可能被去除,并且蚊子噪声和阻塞 可以有效地去除与编码/解码处理相关联的噪声。
    • 6. 发明申请
    • METHOD FOR DESIGNING A CONTROL APPARATUS AND CONTROL APPARATUS
    • 用于设计控制装置和控制装置的方法
    • US20130150993A1
    • 2013-06-13
    • US13817971
    • 2012-05-28
    • Seiya MiyazakiTakahiro KudohYutaka YamamotoMasaaki Nagahara
    • Seiya MiyazakiTakahiro KudohYutaka YamamotoMasaaki Nagahara
    • G05B19/418
    • G05B19/41865H01M10/44H01M10/48H02J7/044H02J7/045
    • A method for designing a control apparatus includes: determining first, second and third threshold values; setting a first weighting function for calculating a first controlled variable by being multiplied by a difference between a control target value and an output value of a storage battery, a second weighting function for calculating a second controlled variable by being multiplied by the output value of the storage battery, and a third weighting function for calculating a third controlled variable by being multiplied by an integrated value of the output value of the storage battery; and determining a transfer function of the control apparatus in accordance with an H-infinity control theory such that the first controlled variable, the second controlled variable and the third controlled variable are respectively smaller than the first, second and third threshold values.
    • 一种控制装置的设计方法,包括:确定第一,第二和第三阈值; 设置第一加权函数,用于通过乘以控制目标值和蓄电池的输出值之间的差来计算第一受控变量,第二加权函数,用于通过乘以第二受控变量的输出值来计算第二受控变量 蓄电池和第三加权函数,用于通过乘以蓄电池的输出值的积分值来计算第三受控变量; 以及根据H-infinity控制理论确定所述控制装置的传递函数,使得所述第一受控变量,所述第二受控变量和所述第三受控变量分别小于所述第一,第二和第三阈值。