公开(公告)号：US07269401B2

公开(公告)日：2007-09-11

申请号：US10927793

申请日：2004-08-27

申请人： Yasuji Saito ,  Masaaki Taira ,  Yutaka Hirakoso

发明人： Yasuji Saito ,  Masaaki Taira ,  Yutaka Hirakoso

IPC分类号： H04B1/06 ,  H04B7/00

CPC分类号： H03J7/045

摘要： A signal processing circuit for a tuner has a detector band pass filter for extracting a carrier of an intermediate frequency signal, a frequency counter for counting, based on a clock signal, a frequency of a carrier of the intermediate frequency signal which passes through the detector band pass filter, and an intermediate frequency variation signal outputting section for outputting an intermediate frequency variation signal based on a difference between the counted frequency and a frequency of the clock signal. Based on the intermediate frequency variation signal, a frequency selection characteristic of an intermediate frequency band pass filter, a signal detector, an adjacent interference detector, or an S-meter-band pass filter are controlled. In this manner, even when a carrier frequency of an intermediate frequency signal input from a tuner varies, the frequency selection characteristic of the intermediate frequency band pass filter, signal detector, adjacent interference detector, and S-meter-band pass filter can be suitably controlled.

摘要翻译： 用于调谐器的信号处理电路具有检测器带通滤波器，用于提取中频信号的载波，用于计数的频率计数器，基于时钟信号，通过检测器的中频信号的载波的频率 带通滤波器和中频变化信号输出部分，用于基于计数的频率和时钟信号的频率之间的差来输出中频变化信号。 基于中频变化信号，控制中频带通滤波器，信号检测器，相邻干扰检测器或S-meter带通滤波器的频率选择特性。 以这种方式，即使当从调谐器输入的中频信号的载波频率变化时，中频带通滤波器，信号检测器，相邻干扰检测器和S-meter带通滤波器的频率选择特性也可以适当地 受控。

公开(公告)号：US20050059368A1

公开(公告)日：2005-03-17

申请号：US10927793

申请日：2004-08-27

申请人： Yasuji Saito ,  Masaaki Taira ,  Yutaka Hirakoso

发明人： Yasuji Saito ,  Masaaki Taira ,  Yutaka Hirakoso

IPC分类号： H04B1/26 ,  H03J7/04 ,  H04B1/10 ,  H04B1/16 ,  H04B1/18 ,  H04L27/02 ,  H04N9/77 ,  H04N9/79 ,  H04N17/00

CPC分类号： H03J7/045

摘要： A signal processing circuit for a tuner has a detector band pass filter for extracting a carrier of an intermediate frequency signal, a frequency counter for counting, based on a clock signal, a frequency of a carrier of the intermediate frequency signal which passes through the detector band pass filter, and an intermediate frequency variation signal outputting section for outputting an intermediate frequency variation signal based on a difference between the counted frequency and a frequency of the clock signal. Based on the intermediate frequency variation signal, a frequency selection characteristic of an intermediate frequency band pass filter, a signal detector, an adjacent interference detector, or an S-meter-band pass filter are controlled. In this manner, even when a carrier frequency of an intermediate frequency signal input from a tuner varies, the frequency selection characteristic of the intermediate frequency band pass filter, signal detector, adjacent interference detector, and S-meter-band pass filter can be suitably controlled.

摘要翻译： 用于调谐器的信号处理电路具有检测器带通滤波器，用于提取中频信号的载波，用于计数的频率计数器，基于时钟信号，通过检测器的中频信号的载波的频率 带通滤波器和中频变化信号输出部分，用于基于计数的频率和时钟信号的频率之间的差来输出中频变化信号。 基于中频变化信号，控制中频带通滤波器，信号检测器，相邻干扰检测器或S-meter带通滤波器的频率选择特性。 以这种方式，即使当从调谐器输入的中频信号的载波频率变化时，中频带通滤波器，信号检测器，相邻干扰检测器和S-meter带通滤波器的频率选择特性也可以适当地 受控。

公开(公告)号：US20080233915A1

公开(公告)日：2008-09-25

申请号：US10599240

申请日：2005-02-23

申请人： Yasuji Saito ,  Yutaka Hirakoso ,  Masaaki Taira

发明人： Yasuji Saito ,  Yutaka Hirakoso ,  Masaaki Taira

IPC分类号： H04B1/16

CPC分类号： H03G3/3052 ,  H03F1/26 ,  H03F1/32 ,  H03F3/68 ,  H03F2200/03 ,  H03G3/344 ,  H04B1/1661

摘要： A signal processing circuit is disclosed which comprises: an attenuating unit that attenuates a demodulated signal acquired by detecting a received signal; a detecting unit that detects a first signal indicating intensity of the demodulated signal; and an attenuation rate setting unit that sets an attenuation rate of the attenuating unit based on the first signal, wherein the attenuation rate setting unit sets the attenuation rate of the attenuating unit depending on: at least one signal of a second signal indicating a change in an envelope curve acquired based on an intermediate frequency signal of the received signal and a third signal indicating electric field intensity acquired based on the intermediate frequency signal; and the first signal.

摘要翻译： 公开了一种信号处理电路，其包括：衰减单元，衰减通过检测接收到的信号而获取的解调信号; 检测单元，其检测指示所述解调信号的强度的第一信号; 以及衰减率设定单元，其基于所述第一信号设定所述衰减单元的衰减率，其中，所述衰减率设定单元根据以下方式设定所述衰减单元的衰减率：指示所述衰减单元的变化的至少一个信号 基于所述接收信号的中频信号获取的包络线，以及指示基于所述中频信号获取的电场强度的第三信号; 和第一个信号。

公开(公告)号：US06363063B1

公开(公告)日：2002-03-26

申请号：US09047824

申请日：1998-03-25

申请人： Kazuhiro Kimura ,  Shigeaki Hayashibe ,  Takahiko Masumoto ,  Yutaka Hirakoso ,  Hiroshi Kaneko

发明人： Kazuhiro Kimura ,  Shigeaki Hayashibe ,  Takahiko Masumoto ,  Yutaka Hirakoso ,  Hiroshi Kaneko

IPC分类号： H04B700

CPC分类号： H03J1/0066 ,  H04H20/22 ,  H04H60/37 ,  H04H2201/13

摘要： A receiver receives FM multiplex broadcast data of both RDS and DARC systems by using one front end. A BIC detection circuit (101) detects a block identification code (BIC) included in received data. A coincidence/non-coincidence detection circuit (104) judges whether or not a BIC detection timing is correct and emits a coincidence/non-coincidence pulse. A forward protection circuit (106) counts a frequency of outputs of non-coincidence pulses and retains an established synchronous condition until the counted value exceeds a predetermined value. Then, a forward protection control circuit (108) inhibits the forward protection circuit from performing a count operation while a search is performed for selecting a station. Also, a rearward protection circuit (105) counts a frequency of outputs of coincidence pulses and establishes a synchronous condition when the counted value reaches a predetermined value. Further, a rearward protection control circuit (800) inhibits the rearward protection circuit from performing a count operation while a search is performed.

摘要翻译： 接收机通过使用一个前端接收RDS和DARC系统的FM多路复用广播数据。 BIC检测电路（101）检测包含在接收数据中的块识别码（BIC）。 一致/不符合检测电路（104）判断BIC检测定时是否正确并且发出一致/非重合脉冲。 正向保护电路（106）对不一致脉冲的输出频率进行计数，并保持建立的同步状态，直到计数值超过预定值。 然后，当进行用于选择站的搜索时，前向保护控制电路（108）禁止前向保护电路执行计数操作。 此外，后方保护电路（105）对一致脉冲的输出频率进行计数，并且当计数值达到预定值时建立同步状态。 此外，在执行搜索时，后向保护控制电路（800）禁止后向保护电路执行计数操作。

公开(公告)号：US5752176A

公开(公告)日：1998-05-12

申请号：US624739

申请日：1996-03-26

申请人： Kazuhiro Kimura ,  Shigeaki Hayashibe ,  Yutaka Hirakoso ,  Takahiko Masumoto ,  Shizuka Ishimura ,  Toshiyuki Ozawa ,  Munehiro Suka

发明人： Kazuhiro Kimura ,  Shigeaki Hayashibe ,  Yutaka Hirakoso ,  Takahiko Masumoto ,  Shizuka Ishimura ,  Toshiyuki Ozawa ,  Munehiro Suka

IPC分类号： H04B1/16 ,  H04B1/18

CPC分类号： H04B1/1646 ,  H04H20/26 ,  H04H20/30 ,  H04H20/22 ,  H04H2201/15

摘要： An SI judging circuit in a service detecting section detects a service identification code included in a block included in received superimposed FM data. When the block represents an unnecessary service, the SI judging circuit generates a predetermined service detecting signal, which is supplied to a station selecting microcomputer. A user operates a station selecting key to request the change of the broadcasting station. When the change is requested, and also the service detecting signal indicating that the service included in the received block is not needed is supplied to the station selecting microcomputer by the SI judging circuit, a control section of the station selecting microcomputer outputs station data corresponding to the requested station to a PLL synthesizer, and then the frequency signal (tuning frequency) is changed at a front end. This enables data received during a period for receiving blocks for unnecessary services to be NG, and can prevent data of blocks including necessary services from being NG.

摘要翻译： 服务检测部分中的SI判断电路检测包含在接收到的叠加FM数据中的块中的服务识别码。 当该块表示不必要的服务时，SI判断电路产生预定的服务检测信号，该信号被提供给站选择微计算机。 用户操作站选择键以请求改变广播电台。 当请求改变，并且指示包含在接收块中的服务不需要的服务检测信号通过SI判断电路提供给站选择微计算机时，站选择微机的控制部分输出对应于 所请求的站到PLL合成器，然后在前端改变频率信号（调谐频率）。 这使得在用于接收不必要服务的块的周期期间接收的数据为NG，并且可以防止包括必需服务的块的数据成为NG。

公开(公告)号：US07542748B2

公开(公告)日：2009-06-02

申请号：US10599240

申请日：2005-02-23

申请人： Yasuji Saito ,  Yutaka Hirakoso ,  Masaaki Taira

发明人： Yasuji Saito ,  Yutaka Hirakoso ,  Masaaki Taira

IPC分类号： H04B1/10 ,  H04B1/16

CPC分类号： H03G3/3052 ,  H03F1/26 ,  H03F1/32 ,  H03F3/68 ,  H03F2200/03 ,  H03G3/344 ,  H04B1/1661

摘要： A signal processing circuit is disclosed which comprises: an attenuating unit that attenuates a demodulated signal acquired by detecting a received signal; a detecting unit that detects a first signal indicating intensity of the demodulated signal; and an attenuation rate setting unit that sets an attenuation rate of the attenuating unit based on the first signal, wherein the attenuation rate setting unit sets the attenuation rate of the attenuating unit depending on: at least one signal of a second signal indicating a change in an envelope curve acquired based on an intermediate frequency signal of the received signal and a third signal indicating electric field intensity acquired based on the intermediate frequency signal; and the first signal.

摘要翻译： 公开了一种信号处理电路，其包括：衰减单元，衰减通过检测接收到的信号而获取的解调信号; 检测单元，其检测指示所述解调信号的强度的第一信号; 以及衰减率设定单元，其基于所述第一信号设定所述衰减单元的衰减率，其中，所述衰减率设定单元根据以下方式设定所述衰减单元的衰减率：指示所述衰减单元的变化的至少一个信号 基于所述接收信号的中频信号获取的包络线，以及指示基于所述中频信号获取的电场强度的第三信号; 和第一个信号。

公开(公告)号：US5802067A

公开(公告)日：1998-09-01

申请号：US614466

申请日：1996-03-12

申请人： Kazuhiro Kimura ,  Shigeaki Hayashibe ,  Yutaka Hirakoso ,  Takahiko Masumoto ,  Shizuka Ishimura ,  Toshiyuki Ozawa ,  Munehiro Suka

发明人： Kazuhiro Kimura ,  Shigeaki Hayashibe ,  Yutaka Hirakoso ,  Takahiko Masumoto ,  Shizuka Ishimura ,  Toshiyuki Ozawa ,  Munehiro Suka

IPC分类号： H04B1/16 ,  H04J3/12

CPC分类号： H04H20/34 ,  H04H40/18 ,  H04H2201/13

摘要： In accordance with the operation of an operating section 14, a control section 12 performs a reception control operation and demodulates a signal passing through a band pass filter 7 for extracting a multiplex signal using a multiplex signal demodulating section 8 when receiving a broadcast signal. A block synchronization circuit 16 of a synchronization circuit 9 carries out block synchronization processing on the demodulated signal. When block synchronization is established, a synchronization determination signal is supplied to a detecting section DET and the detecting section DET determines that a broadcasting station whose radio waves are currently being received is a multiplex broadcasting station.

摘要翻译： 根据操作部分14的操作，控制部分12在接收广播信号时，执行接收控制操作并且解调通过带通滤波器7的信号，以使用多路复用信号解调部分8提取多路复用信号。 同步电路9的块同步电路16对解调信号执行块同步处理。 当建立块同步时，将同步确定信号提供给检测部分DET，并且检测部分DET确定当前正在接收无线电波的广播电台是多路复用广播电台。

公开(公告)号：US5757825A

公开(公告)日：1998-05-26

申请号：US588639

申请日：1996-01-19

申请人： Kazuhiro Kimura ,  Shigeaki Hayashibe ,  Yutaka Hirakoso ,  Takahiko Masumoto ,  Shizuka Ishimura ,  Toshiyuki Ozawa ,  Munehiro Suka

发明人： Kazuhiro Kimura ,  Shigeaki Hayashibe ,  Yutaka Hirakoso ,  Takahiko Masumoto ,  Shizuka Ishimura ,  Toshiyuki Ozawa ,  Munehiro Suka

IPC分类号： H03M13/00 ,  H04L1/00 ,  F01B25/06

CPC分类号： H04L1/0065 ,  H04L1/0057 ,  H04L1/0061

摘要： In multiplex FM broadcasting, a digital signal is composed of a frame which consists of a predetermined number of blocks in the vertical direction, a block consisting of a predetermined number of bits in the horizontal direction and having a horizontal parity (error correcting code) for correcting errors in the horizontal direction and a vertical parity for correcting errors in the vertical direction. The block also has a control bit for determining whether the error correction in the horizontal direction is to be carried out only once. A decoding identification detector (20) detects the content of the control bit, a controller (12) controls the re-writing of the digital signal into a frame buffer (13) after the error correction of the digital signal in the vertical direction by an error corrector (14). The controller (12) also controls the provision of the digital signal stored in the buffer (13) to the error corrector (14) according to the content of the control bit, determining whether the second error correction in the horizontal direction is to be carried out.

摘要翻译： 在多路复用FM广播中，数字信号由在垂直方向上由预定数量的块组成的帧构成，由水平方向上的预定数量的比特组成的块，并且具有水平奇偶校验码（纠错码） 校正水平方向上的误差和用于校正垂直方向上的误差的垂直奇偶校验。 该块还具有用于确定水平方向上的纠错是否仅被执行一次的控制位。 解码识别检测器（20）检测控制位的内容，控制器（12）在垂直方向的数字信号的纠错之后控制数字信号重新写入帧缓冲器（13） 误差校正器（14）。 控制器（12）还根据控制位的内容控制向缓冲器（13）中存储的数字信号的提供给纠错器（14），确定是否要携带水平方向上的第二纠错 出来

公开(公告)号：US07664197B2

公开(公告)日：2010-02-16

申请号：US10599456

申请日：2005-02-23

申请人： Yasuji Saito ,  Yutaka Hirakoso ,  Masaaki Taira

发明人： Yasuji Saito ,  Yutaka Hirakoso ,  Masaaki Taira

IPC分类号： H03C5/00 ,  H04L27/02

CPC分类号： H03G3/3052 ,  H03G5/165 ,  H04B1/1036

摘要： An AM receiving circuit is disclosed which comprises an intermediate frequency amplifying unit that generates an intermediate frequency signal from a broadcast wave signal received by an antenna to amplify and output the intermediate frequency signal; an AGC (Automatic Gain Control) unit that sets gain of the intermediate frequency amplifying unit depending on electric field intensity of the broadcast wave signal; and an AM detecting unit that detects the intermediate frequency signal output from the intermediate frequency amplifying unit, wherein the AM receiving circuit comprises a sound quality compensating unit including: a filter unit that extracts a predetermined frequency band of the audio signal; an amplifying unit that boosts or attenuates the audio signal in the predetermined frequency band extracted from the filter unit; and a controlling unit that controls filter characteristics of the filter unit and sets a boosting function or an attenuating function of the amplifying unit, depending on the electric field intensity of the broadcast wave signal.

摘要翻译： 公开了一种AM接收电路，其包括中频放大单元，其从由天线接收的广播波信号产生中频信号，以放大和输出中频信号; AGC（Automatic Gain Control，自动增益控制）单元，其根据广播波信号的电场强度来设定中频放大单元的增益; 以及AM检测单元，其检测从所述中频放大单元输出的中频信号，其中，所述AM接收电路包括声音质量补偿单元，所述声音质量补偿单元包括：提取所述音频信号的预定频带的滤波器单元; 放大单元，用于对从滤波器单元提取的预定频带中的音频信号进行升压或衰减; 以及控制单元，其根据广播波信号的电场强度来控制滤波器单元的滤波器特性并设置放大单元的升压功能或衰减功能。

公开(公告)号：US20070206706A1

公开(公告)日：2007-09-06

申请号：US10599456

申请日：2005-02-23

申请人： Yasuji Saito ,  Yutaka Hirakoso ,  Masaaki Taira

发明人： Yasuji Saito ,  Yutaka Hirakoso ,  Masaaki Taira

IPC分类号： H03D1/00

CPC分类号： H03G3/3052 ,  H03G5/165 ,  H04B1/1036

摘要： An AM receiving circuit is disclosed which comprises an intermediate frequency amplifying unit that generates an intermediate frequency signal from a broadcast wave signal received by an antenna to amplify and output the intermediate frequency signal; an AGC (Automatic Gain Control) unit that sets gain of the intermediate frequency amplifying unit depending on electric field intensity of the broadcast wave signal; and an AM detecting unit that detects the intermediate frequency signal output from the intermediate frequency amplifying unit, wherein the AM receiving circuit comprises a sound quality compensating unit including: a filter unit that extracts a predetermined frequency band of the audio signal; an amplifying unit that boosts or attenuates the audio signal in the predetermined frequency band extracted from the filter unit; and a controlling unit that controls filter characteristics of the filter unit and sets a boosting function or an attenuating function of the amplifying unit, depending on the electric field intensity of the broadcast wave signal.

摘要翻译： 公开了一种AM接收电路，其包括中频放大单元，其从由天线接收的广播波信号产生中频信号，以放大和输出中频信号; AGC（Automatic Gain Control，自动增益控制）单元，其根据广播波信号的电场强度来设定中频放大单元的增益; 以及AM检测单元，其检测从所述中频放大单元输出的中频信号，其中，所述AM接收电路包括声音质量补偿单元，所述声音质量补偿单元包括：提取所述音频信号的预定频带的滤波器单元; 放大单元，用于对从滤波器单元提取的预定频带中的音频信号进行升压或衰减; 以及控制单元，其根据广播波信号的电场强度来控制滤波器单元的滤波器特性并设置放大单元的升压功能或衰减功能。