公开(公告)号：US5987075A

公开(公告)日：1999-11-16

申请号：US988209

申请日：1997-12-10

申请人： Katsuaki Abe ,  Takaaki Kishigami ,  Masahiro Mimura ,  Makoto Hasegawa ,  Katsushi Yokozaki ,  Yoichi Yamaki ,  Toshiyuki Tsumura ,  Hiroshi Katayama

发明人： Katsuaki Abe ,  Takaaki Kishigami ,  Masahiro Mimura ,  Makoto Hasegawa ,  Katsushi Yokozaki ,  Yoichi Yamaki ,  Toshiyuki Tsumura ,  Hiroshi Katayama

IPC分类号： H03G3/20 ,  H04L25/06 ,  H04L27/14

CPC分类号： H03G3/3068 ,  H04L25/061

摘要： An FSK signal receiver includes an amplifier which amplifies a first FSK signal at an adjustable gain. A frequency converter converts an output signal from the amplifier into a second FSK signal having a frequency lower than a frequency of the first FSK signal. A demodulator demodulates the second FSK signal into a baseband signal. A bit-state detector detects a bit state from the baseband signal in response to a threshold. A calculator calculates a number of times of occurrence of a fact that the baseband signal moves across the threshold during a given time. The gain of the amplifier is adjusted in response to the number of times which is calculated by the calculator.

摘要翻译： FSK信号接收机包括放大器，其以可调增益放大第一FSK信号。 变频器将来自放大器的输出信号转换成具有低于第一FSK信号的频率的频率的第二FSK信号。 解调器将第二FSK信号解调为基带信号。 位状态检测器响应于阈值从基带信号检测比特状态。 计算器计算在给定时间内基带信号在阈值上移动的事实的发生次数。 响应于由计算器计算的次数来调节放大器的增益。

公开(公告)号：US5781588A

公开(公告)日：1998-07-14

申请号：US548373

申请日：1995-11-01

申请人： Katsuaki Abe ,  Takaaki Kishigami ,  Masahiro Mimura ,  Makoto Hasegawa ,  Katsushi Yokozaki ,  Yoichi Yamaki ,  Toshiyuki Tsumura ,  Hiroshi Katayama

发明人： Katsuaki Abe ,  Takaaki Kishigami ,  Masahiro Mimura ,  Makoto Hasegawa ,  Katsushi Yokozaki ,  Yoichi Yamaki ,  Toshiyuki Tsumura ,  Hiroshi Katayama

IPC分类号： H03G3/20 ,  H04L25/06 ,  H04L27/14

CPC分类号： H03G3/3068 ,  H04L25/061

摘要： An FSK signal receiver includes an amplifier which amplifies a first FSK signal at an adjustable gain. A frequency converter converts an output signal from the amplifier into a second FSK signal having a frequency lower than a frequency of the first FSK signal. A demodulator demodulates the second FSK signal into a baseband signal. A bit-state detector detects a bit state from the baseband signal in response to a threshold. A calculator calculates a number of times of occurrence of a fact that the baseband signal moves across the threshold during a given time. The gain of the amplifier is adjusted in response to the number of times which is calculated by the calculator.

公开(公告)号：US06693977B2

公开(公告)日：2004-02-17

申请号：US09855613

申请日：2001-05-16

申请人： Hiroshi Katayama ,  Katsuaki Abe ,  Yasumi Imagawa

发明人： Hiroshi Katayama ,  Katsuaki Abe ,  Yasumi Imagawa

IPC分类号： H03D300

CPC分类号： H03D3/245 ,  H03D3/007

摘要： A direct conversion receiver includes a local oscillator for generating a first local oscillator signal having a variable frequency. A 90° phase shifter operates for shifting a phase of the first local oscillator signal by 90° to convert the first local oscillator signal into a second local oscillator signal. A first mixer operates for mixing a received RF signal and the first local oscillator signal. A second mixer operates for mixing the received RF signal and the second local oscillator signal. A first low pass filter processes an output signal of the first mixer. The first low pass filter has a controllable cutoff frequency. A second low pass filter processes an output signal of the second mixer. The second low pass filter has a controllable cutoff frequency. A demodulator recovers an information signal represented by the received RF signal from output signals of the first and second low pass filters. A frequency error detector operates for detecting an error between a frequency of a carrier of the received RF signal and the frequency of the first local oscillator signal in response to the information signal recovered by the demodulator. An oscillator controller operates for controlling the frequency of the first local oscillator signal in response to the error detected by the frequency error detector. A filter controller operates for controlling the cutoff frequencies of the first and second low pass filters in response to the error detected by the frequency error detector.

摘要翻译： 直接转换接收机包括用于产生具有可变频率的第一本机振荡器信号的本地振荡器。 90°移相器用于将第一本地振荡器信号的相位移位90°以将第一本机振荡器信号转换为第二本机振荡器信号。 第一混频器用于混合接收的RF信号和第一本地振荡器信号。 第二混频器用于混合接收到的RF信号和第二本地振荡器信号。 第一低通滤波器处理第一混频器的输出信号。 第一个低通滤波器具有可控的截止频率。 第二低通滤波器处理第二混频器的输出信号。 第二低通滤波器具有可控的截止频率。 解调器从第一和第二低通滤波器的输出信号中恢复由接收的RF信号表示的信息信号。 频率误差检测器用于响应于由解调器恢复的信息信号来检测接收的RF信号的载波的频率与第一本地振荡器信号的频率之间的误差。 振荡器控制器用于响应于由频率误差检测器检测到的误差来控制第一本地振荡器信号的频率。 滤波器控制器用于响应于由频率误差检测器检测到的误差来控制第一和第二低通滤波器的截止频率。

公开(公告)号：US06275542B1

公开(公告)日：2001-08-14

申请号：US09070154

申请日：1998-04-30

申请人： Hiroshi Katayama ,  Katsuaki Abe ,  Yasumi Imagawa

发明人： Hiroshi Katayama ,  Katsuaki Abe ,  Yasumi Imagawa

IPC分类号： H03D300

CPC分类号： H03D3/245 ,  H03D3/007

摘要： A direct conversion receiver includes a local oscillator for generating a first local oscillator signal having a variable frequency. A 90° phase shifter operates for shifting a phase of the first local oscillator signal by 90° to convert the first local oscillator signal into a second local oscillator signal. A first mixer operates for mixing a received RF signal and the first local oscillator signal. A second mixer operates for mixing the received RF signal and the second local oscillator signal. A first low pass filter processes an output signal of the first mixer. The first low pass filter has a controllable cutoff frequency. A second low pass filter processes an output signal of the second mixer. The second low pass filter has a controllable cutoff frequency. A demodulator recovers an information signal represented by the received RF signal from output signals of the first and second low pass filters. A frequency error detector operates for detecting an error between a frequency of a carrier of the received RF signal and the frequency of the first local oscillator signal in response to the information signal recovered by the demodulator. An oscillator controller operates for controlling the frequency of the first local oscillator signal in response to the error detected by the frequency error detector. A filter controller operates for controlling the cutoff frequencies of the first and second low pass filters in response to the error detected by the frequency error detector.

摘要翻译： 直接转换接收机包括用于产生具有可变频率的第一本机振荡器信号的本地振荡器。 90°移相器用于将第一本地振荡器信号的相位移位90°以将第一本机振荡器信号转换为第二本机振荡器信号。 第一混频器用于混合接收的RF信号和第一本地振荡器信号。 第二混频器用于混合接收到的RF信号和第二本地振荡器信号。 第一低通滤波器处理第一混频器的输出信号。 第一个低通滤波器具有可控的截止频率。 第二低通滤波器处理第二混频器的输出信号。 第二低通滤波器具有可控的截止频率。 解调器从第一和第二低通滤波器的输出信号中恢复由接收的RF信号表示的信息信号。 频率误差检测器用于响应于由解调器恢复的信息信号来检测接收的RF信号的载波的频率与第一本地振荡器信号的频率之间的误差。 振荡器控制器用于响应于由频率误差检测器检测到的误差来控制第一本地振荡器信号的频率。 滤波器控制器用于响应于由频率误差检测器检测到的误差来控制第一和第二低通滤波器的截止频率。

公开(公告)号：US5894499A

公开(公告)日：1999-04-13

申请号：US796911

申请日：1997-02-06

申请人： Hiroshi Katayama ,  Yasumi Imagawa ,  Masahiro Mimura

发明人： Hiroshi Katayama ,  Yasumi Imagawa ,  Masahiro Mimura

IPC分类号： H04L27/148 ,  H04B1/16 ,  H04B7/26 ,  H04L27/00 ,  H04L27/14 ,  H04L27/227 ,  H04Q7/14

CPC分类号： H04L27/2273 ,  H04L2027/0057

摘要： A direct conversion receiver has: an I-low-pass filter 9 which has cut-off frequency switching device, switches over the cut-off frequency in accordance with the transmission rate, and eliminates high-frequency components from a modulated signal mixed with a first local signal; a Q-low-pass filter 10 which eliminates high-frequency components from a modulated signal mixed with the first local signal phase-shifted by 90 degrees; transmission rate detecting device 13 for detecting transmission rate information from transmission data detected by transmission data detecting device 12; and I- and Q-low-pass filter cut-off frequency controlling device 15 and 16 for generating I- and Q-control signals which control the cut-off frequency switching device, from the detected transmission rate. The cut-off frequencies of the low-pass filters are switched over in accordance with the transmission rate of reception.

摘要翻译： 直接转换接收机具有：具有截止频率切换装置的I低通滤波器9，根据传输速率切换截止频率，并且从混合有调制信号的调制信号中消除高频分量 第一个本地信号; Q-低通滤波器10，其从与第一本地信号相移90度混合的调制信号中消除高频分量; 传输速率检测装置13，用于从由传输数据检测装置12检测的传输数据检测传输速率信息; 以及用于从检测到的传输速率产生控制截止频率切换装置的I和Q控制信号的I和Q-低通滤波器截止频率控制装置15和16。 根据接收的传输速率切换低通滤波器的截止频率。

公开(公告)号：US08947868B2

公开(公告)日：2015-02-03

申请号：US13611857

申请日：2012-09-12

申请人： Takuya Motoishi ,  Yuuki Kubota ,  Yasushi Itoshiro ,  Junichiro Ishii ,  Hiroshi Katayama ,  Junichiro Misawa

发明人： Takuya Motoishi ,  Yuuki Kubota ,  Yasushi Itoshiro ,  Junichiro Ishii ,  Hiroshi Katayama ,  Junichiro Misawa

IPC分类号： H05K5/00

CPC分类号： G06F1/1613 ,  G06F2200/1633

摘要： A protective cover includes an input operating unit and a cover unit. Through the input operating unit, an input operation to an electronic apparatus is performed. In the cover unit, the input operating unit is disposed. In the protective cover, the cover unit includes a folding section and two plate sections connected to the folding section. A connection terminal section is provided to which the electronic apparatus is connected. A wiring section which interconnects the input operating unit and the connection terminal section and which is bent attendantly on folding at the folding section is disposed inside the cover unit. Folding at the folding section into a predetermined shape enables setting of a cover mode in which the electronic apparatus is covered.

摘要翻译： 保护盖包括输入操作单元和盖单元。 通过输入操作单元，执行对电子设备的输入操作。 在盖单元中，布置输入操作单元。 在保护盖中，盖单元包括折叠部分和连接到折叠部分的两个板部分。 连接端子部分设置有与电子设备连接的连接端子部分。 将输入操作单元和连接端子部分互连并在折叠部分折叠时弯曲弯曲的布线部分设置在盖单元内。 在折叠部分折叠成预定形状使得能够设置覆盖电子设备的覆盖模式。

公开(公告)号：US20090096921A1

公开(公告)日：2009-04-16

申请号：US12151552

申请日：2008-05-07

申请人： Hiroshi Katayama

发明人： Hiroshi Katayama

IPC分类号： H04N7/04

CPC分类号： H04N21/4821 ,  H04N5/44591 ,  H04N5/45 ,  H04N7/56 ,  H04N21/2365 ,  H04N21/4305 ,  H04N21/4307 ,  H04N21/4316 ,  H04N21/434 ,  H04N21/4347 ,  H04N21/4348 ,  H04N21/64792

摘要： An image processing apparatus includes: digital-source processing means for processing a plurality of digital sources; analog-source processing means for processing a plurality of analog sources; and generation means for generating a clock independently of a clock locked with each input source of the digital sources and the analog sources, and generating a clock in synchronism with a clock selected out of the input sources. The digital-source processing means and the analog-source processing means have individual clock recovery functions independently.

摘要翻译： 一种图像处理装置，包括：数字源处理装置，用于处理多个数字源; 用于处理多个模拟源的模拟源处理装置; 以及产生装置，用于独立于与数字源和模拟源的每个输入源锁定的时钟产生时钟，并且与从输入源选择的时钟同步地产生时钟。 数字源处理装置和模拟源处理装置独立地具有独立的时钟恢复功能。

公开(公告)号：US07454124B2

公开(公告)日：2008-11-18

申请号：US11075600

申请日：2005-03-09

申请人： Yoshihito Osawa ,  Hiroshi Katayama

发明人： Yoshihito Osawa ,  Hiroshi Katayama

IPC分类号： H04N5/91

CPC分类号： H04N21/4305 ,  H04N5/4401 ,  H04N5/46 ,  H04N7/01 ,  H04N19/40 ,  H04N19/587 ,  H04N19/85

摘要： For a plurality of digital video signals whose frame frequencies are different, a pixel number converting circuit to convert the number of pixels is provided so that differences of the frame frequencies are replaced to differences of the numbers of pixels and a plurality of digital video signals whose frame frequencies are different can be processed by a common clock frequency. The frame frequency is detected by a frame frequency value decoder and the number of pixels in the horizontal direction of the pixel number converting circuit is properly set in accordance with the frame frequency. As mentioned above, if the differences of the frame frequencies are replaced to the differences of the numbers of pixels and the images are converted into the image in which the frame frequencies are the same and the numbers of pixels are different, the frame frequencies are equalized and the signals can be processed by the same clock.

摘要翻译： 对于帧频不同的多个数字视频信号，提供转换像素数目的像素数转换电路，使得帧频的差异被替换为像素数量和多个数字视频信号的差异 帧频不同可以通过公共时钟频率进行处理。 帧频由帧频值解码器检测，并且像素数转换电路的水平方向的像素数根据帧频适当地设定。 如上所述，如果将帧频的差异替换为像素数的差异，并且将图像转换为帧频相同且像素数不同的图像，则将帧频均衡 信号可以通过相同的时钟进行处理。

公开(公告)号：US07415070B2

公开(公告)日：2008-08-19

申请号：US11093790

申请日：2005-03-30

申请人： Hiroshi Katayama

发明人： Hiroshi Katayama

IPC分类号： H04B1/66 ,  H04N7/12

CPC分类号： H04N21/23424 ,  H04N19/107 ,  H04N19/61 ,  H04N21/4384 ,  H04N21/44016

摘要： When a digital broadcast receiver selects a channel and thereby changes an MPEG picture stream, a video decoder starts a decoding operation in response to an instruction to start decoding. When a predictive coded picture includes an intra slice and an intra macroblock, the video decoder decodes the intra slice and the intra macroblock of the predictive coded picture without waiting for an intra picture to be decoded. When a macroblock to be referred to has previously been decoded, the video decoder further decodes a non-intra slice and a non-intra macroblock of the predictive coded picture by using a decoding result of the macroblock to be referred to. Thus, when changing the channel, for example, it is possible to quickly obtain output picture data, shorten interruption of the pictures, and check a picture of the next channel in a short time.

摘要翻译： 当数字广播接收机选择信道并从而改变MPEG图像流时，视频解码器响应于开始解码的指令开始解码操作。 当预测编码图像包括帧内和帧内宏块时，视频解码器解码预测编码图像的帧内和帧内宏块，而不必等待帧内图像被解码。 当要参考的宏块先前被解码时，视频解码器通过使用要参考的宏块的解码结果进一步解码预测编码图像的非帧内和非帧内宏块。 因此，当改变频道时，例如，可以快速获得输出图像数据，缩短图像的中断，并在短时间内检查下一个频道的图像。

公开(公告)号：US07386051B2

公开(公告)日：2008-06-10

申请号：US11093872

申请日：2005-03-30

申请人： Hiroshi Katayama

发明人： Hiroshi Katayama

IPC分类号： H04B1/66

CPC分类号： H04N21/23424 ,  H04N19/107 ,  H04N19/61 ,  H04N21/4384 ,  H04N21/44016

摘要： When a digital broadcast receiver selects a channel and thereby changes an MPEG picture stream, a video decoder starts a decoding operation in response to an instruction to start decoding. When a predictive coded picture includes an intra slice and an intra macroblock, the video decoder decodes the intra slice and the intra macroblock of the predictive coded picture without waiting for an intra picture to be decoded. When a macroblock to be referred to has previously been decoded, the video decoder further decodes a non-intra slice and a non-intra macroblock of the predictive coded picture by using a decoding result of the macroblock to be referred to. Thus, when changing the channel, for example, it is possible to quickly obtain output picture data, shorten interruption of the pictures, and check a picture of the next channel in a short time.