利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

55 条记录 (耗时 0.047 秒)

    Sampling rate converter
    2.
    发明授权
    Sampling rate converter 失效
    采样率转换器

    公开(公告)号：US5068716A

    公开(公告)日：1991-11-26

    申请号：US499679

    申请日：1990-03-27

    申请人： Jun Takayama ,  Tadao Fujita ,  Takeshi Ninomiya

    发明人： Jun Takayama ,  Tadao Fujita ,  Takeshi Ninomiya

    IPC分类号： H03H17/00 ,  H03H17/02 ,  H03H17/06 ,  H04N7/01

    CPC分类号： H03H17/0685 ,  H04N7/0102

    摘要： In a sampling rate converter, an input digital video signal has its sampling rate converted from a first sampling frequency to a second or different sampling frequency by oversampling the input digital video signal at a rate which is an integral multiple of the first sampling frequency so as to generate zero values between data of the input digital video signal, interpolating an output signal from the oversampled input digital video signal, decimating the interpolated output signal for generating therefrom a digital video signal having the desired second sampling frequency, and only then applying the digital video signal having the second sampling frequency to a low pass filter, preferably of the finite impulse response type, for eliminating therefrom an undesirable signal component which is due to the sample rate conversion and which appears between frequency bands of one-half of the first and second sampling frequencies, respectively.

    Method and apparatus for encoding and decoding data in residue number system
    3.
    发明授权
    Method and apparatus for encoding and decoding data in residue number system 失效
    残留号码系统中数据的编码和解码方法和装置

    公开(公告)号：US5008668A

    公开(公告)日：1991-04-16

    申请号：US256732

    申请日：1988-10-12

    申请人： Jun Takayama ,  Takeshi Ninomiya ,  Tadao Fujita ,  Yoshiaki Inaba

    发明人： Jun Takayama ,  Takeshi Ninomiya ,  Tadao Fujita ,  Yoshiaki Inaba

    IPC分类号： H03M7/18

    CPC分类号： H03M7/18

    摘要： In a method and apparatus for encoding and decoding data in the residue number system, input binary data are supplied to an encoder to be divided by moduli m.sub.0, m.sub.1, m.sub.2, . . . m (i.e., positive integers having a mutually prime relation). Residue data corresponding to respective moduli are output from the encoder to a digital filter circuit including a plurality of digital filters, each filter corresponding to a respective modulus. Processing for some specified application is performed by the digital filters based, for example, on the Mixed Radix Conversion Method method to generate output data still in the residue format. The residue data output from the digital filters then are input to a decoder to be converted back into binary data. Encoding is performed by splitting n-bit straight binary data into, for example, upper bit data and lower bit data, received by respective ROM tables. Each ROM table outputs a value to another common ROM table which outputs the converted residue data. The ROM tables convert the binary data by weighing each input bit by a value corresponding to the particular bit. The capacity needed for the ROM tables is reduced, enabling the encoder circuit configuration to be simple and fast. Decoding is performed by scaling down RNS data to obtain a plurality of residue data corresponding to respective moduli, adding one to a fixed bit of the residue data for discriminating positive and negative numbers, and performing addition on such residue data with fixed moduli to obtain binary data.

    摘要翻译： 在用于对残差编号系统中的数据进行编码和解码的方法和装置中，输入的二进制数据被提供给编码器，以被分割为模数m0，m1，m2。 。 。 m（即具有互相关的正整数）。 对应于各个模数的残差数据从编码器输出到包括多个数字滤波器的数字滤波器电路，每个滤波器对应于相应的模数。 通过例如基于混合基变换方法的数字滤波器来执行某些特定应用的处理，以产生仍然为残留格式的输出数据。 然后从数字滤波器输出的残留数据被输入到解码器，以被转换成二进制数据。 通过将n位直的二进制数据分割为由各个ROM表接收的例如高位数据和低位数据来执行编码。 每个ROM表将另一公共ROM表输出一个值，该公用ROM表输出转换的残差数据。 ROM表通过将每个输入位加权一个与特定位对应的值来转换二进制数据。 减少ROM表所需的容量，使编码器电路配置简单快捷。 通过缩小RNS数据进行解码以获得对应于各个模数的多个残差数据，将一个加到残差数据的固定位，用于识别正数和负数，并用固定模量对这样的残差数据进行加法以获得二进制 数据。

    Sampling rate converting apparatus
    4.
    发明授权
    Sampling rate converting apparatus 失效
    采样速率转换装置

    公开(公告)号：US5204827A

    公开(公告)日：1993-04-20

    申请号：US768243

    申请日：1991-10-15

    申请人： Tadao Fujita ,  Jun Takayama ,  Takeshi Ninomiya

    发明人： Tadao Fujita ,  Jun Takayama ,  Takeshi Ninomiya

    IPC分类号： H03H17/02 ,  H03H17/06 ,  H04N7/01

    CPC分类号： H03H17/0294 ,  H03H17/0657 ,  H03H17/0664 ,  H03H17/0685 ,  H04N7/0102

    摘要： A sampling rate converting apparatus is arranged in such a manner that, in a case where the frequency ratio of a first or a second sampling frequency holds a simple integral relationship, its oversampling filters are composed of FIR type digital filters the length of each of which corresponds to the least common multiple of the frequency ratio so that the first or the second sampling frequency of the digital signal is converted into the second or the first sampling frequency.A sampling rate converting apparatus is arranged in such a manner that coefficients to be given to weighting means of oversampling filters are changed by selecting coefficient data of coefficient generating means including a plurality of selectable coefficient data so that, in a case where the frequency ratio of the first or the second sampling frequency does not hold a simple integral relationship, the first or the second sampling frequency of the digital signal can be converted into the second or the first sampling frequency.

    Automatic offset compensating bipolar A/D converter circuit
    7.
    发明授权
    Automatic offset compensating bipolar A/D converter circuit 失效
    自动偏移补偿双极A / D转换电路

    公开(公告)号：US4766417A

    公开(公告)日：1988-08-23

    申请号：US55849

    申请日：1987-06-01

    申请人： Jun Takayama ,  Takeshi Ninomiya

    发明人： Jun Takayama ,  Takeshi Ninomiya

    IPC分类号： H03M1/10 ,  H03M1/00 ,  H03M1/06

    CPC分类号： H03M1/0607 ,  H03M1/12

    摘要： An automatic offset compensating bipolar A/D converter circuit includes an A/D converter and a feedback circuit, which automatically compensates offset error between a specific level of input having analog voltage and a specific output code of output digital value corresponding to that input analog voltage. The A/D converter can convert the input analog voltage, which includes residual noises more than 1 LSB, into an output digital value. The feedback circuit can add a compensation voltage to the input analog voltage so as to equalize the posibilities of occurrence of codes which are more than and less than a specific output code of an output digital value to each other in accordance with an output digital value.

    摘要翻译： 自动偏移补偿双极性A / D转换器电路包括A / D转换器和反馈电路，其自动补偿具有模拟电压的特定输入电平与对应于该输入模拟电压的输出数字值的特定输出代码之间的偏移误差 。 A / D转换器可将输入模拟电压（包括大于1 LSB的残留噪声）转换为输出数字值。 反馈电路可以向输入模拟电压添加补偿电压，以便根据输出数字值将输出数字值的特定输出代码大于并小于其特定输出代码的代码发生的可能性相等。

    Image sensing apparatus and image processing method
    8.
    发明授权
    Image sensing apparatus and image processing method 有权
    图像传感装置及图像处理方法

    公开(公告)号：US08228397B2

    公开(公告)日：2012-07-24

    申请号：US12908489

    申请日：2010-10-20

    申请人： Tetsuya Katagiri ,  Koichi Kamon ,  Jun Takayama

    发明人： Tetsuya Katagiri ,  Koichi Kamon ,  Jun Takayama

    IPC分类号： H04N5/228 ,  H04N5/235 ,  H04N9/68 ,  H04N1/46 ,  G06K9/36 ,  G06K9/40 ,  G03F3/08

    CPC分类号： H04N5/235

    摘要： An image sensing apparatus includes: an image sensing section for sensing an image of a subject; a detector for detecting a luminance of the subject; a compressor for compressing a dynamic range of the subject image; and a controller for controlling a compression characteristic to be used in compressing the dynamic range based on a detection result of the detector.

    摘要翻译： 一种图像感测装置包括：用于感测被摄体图像的图像感测部分; 用于检测被摄体的亮度的检测器; 用于压缩所述被摄体图像的动态范围的压缩器; 以及控制器，用于基于检测器的检测结果来控制用于压缩动态范围的压缩特性。

    Imaging Device
    10.
    发明申请
    Imaging Device 有权
    成像设备

    公开(公告)号：US20090153713A1

    公开(公告)日：2009-06-18

    申请号：US11883898

    申请日：2006-02-02

    申请人： Kazuko Nakagawa ,  Jun Takayama

    发明人： Kazuko Nakagawa ,  Jun Takayama

    IPC分类号： H04N5/335

    CPC分类号： H04N5/335 ,  H04N5/2355 ,  H04N5/35518

    摘要： An imaging device including an imaging element having a plurality of pixels for switching a linear conversion mode for linearly converting incident light to an electric signal and a logarithm conversion mode for logarithmically converting incident light to an electric signal on the basis of incident light intensity, a conversion unit for converting and outputting a reference electric signal converted logarithmically and outputted from the imaging element to an electric signal obtained by linearly converting an electric signal before logarithm conversion, a correction unit, when an electric signal converted logarithmically and outputted from the imaging element is varied from the reference electric signal, for correcting it so as to coincide with the reference electric signal, and a circuit for giving the corrected electric signal to the conversion unit.

    摘要翻译： 一种成像装置，包括具有多个像素的成像元件，用于将入射光线性转换为电信号的线性转换模式切换，以及基于入射光强度将入射光对数转换为电信号的对数转换模式， 转换单元，用于转换和输出对数转换并从成像元件输出的参考电信号到通过线性转换对数转换之前的电信号获得的电信号，校正单元，当从成像元件对数输出的电信号是 与参考电信号不同，用于将其校正为与参考电信号一致，以及用于将修正的电信号提供给转换单元的电路。