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公开(公告)号：EP0998068A4
公开(公告)日：2003-05-07
申请号：EP99907836
申请日：1999-02-19
Applicant: SONY CORP
Inventor： IKEDA YASUNARI , OKADA TAKAHIRO
CPC classification number: H04L5/0048 , H04L5/0007 , H04L25/022 , H04L25/0232 , H04L25/03159 , H04L27/2647 , H04L2025/03414 , H04L2025/03522
Abstract: The intermediate frequency signals of OFDM signals received by a tuner (2) are multiplied by the carrier wave by multipliers (3 and 4) to generate OFDM signals of the base band. An FFT circuit (5) processes the OFDH signals of the base band and then supplies them to a pilot signal extraction circuit (8) and a division circuit (10) in an equalizer circuit (13). The pilot signals extracted by the pilot signal extraction circuit (8) are supplied to an interpolation filter (9). The amplitude and phase components of the interpolated pilot signals are supplied to the division circuit (10). The division circuit (l0) divides the signals input from the FFT circuit (5) by the amplitude and the phase received from the interpolation filter (9) and supplies the resulting signals to a demapping circuit (11). An FFT window circuit (6) detects the length of the guard interval from the outputs of the multipliers (3 and 4) and supplies it to a control circuit (21). In response to the received guard interval, the control circuit (21) controls the bandwidth of the interpolation filter (9) to restrict the deterioration of the equalization characteristic due to noise.
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公开(公告)号：BRPI0707551A2
公开(公告)日：2011-05-10
申请号：BRPI0707551
申请日：2007-02-06
Applicant: SONY CORP
Inventor： OKAMOTO TAKUYA , YAMAGATA TAKU , OKADA TAKAHIRO
IPC: H04J11/00
Abstract: The present invention provides an OFDM demodulation device for demodulating an orthogonal frequency division multiplexed (OFDM) signal whose transmission unit is a transmission symbol produced by quadrature modulation in such a way that information is divided for a plurality of subcarriers in a predetermined band. The OFDM demodulation device includes a carrier frequency offset detecting circuit (20). The carrier frequency offset detecting circuit divides the subcarriers at the positions at which a TMCC signal, an AC signal, or a CP signal is inserted, defined in conformity with the standard when a specific offset amount is assumed, into a plurality of groups; maps the squares of phase rotation amounts with respect to an immediately-previous OFDM symbol on a complex plane; converts the squares to rotation vectors; cumulatively adds the rotation vectors to each other for each of the groups to thereby calculate the absolute values of the cumulative-addition-result values; and adds the absolute values of the cumulative-addition-result values calculated on a group-by-group basis to each other for all the groups to thereby calculate the addition-result absolute value, thereby defining the offset amount assumed when the maximum addition-result absolute value is obtained as the carrier frequency offset amount.
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公开(公告)号：BRPI0703953A
公开(公告)日：2008-05-27
申请号：BRPI0703953
申请日：2007-10-04
Applicant: SONY CORP
Inventor： OKADA TAKAHIRO
Abstract: A receiving apparatus includes: a demodulating unit which demodulates an IF signal obtained by subjecting a received RF signal to frequency conversion; a detecting unit which detects a carrier wave frequency error contained in the IF signal; a frequency control unit which sets an initial value of a frequency in the demodulation process by the demodulating unit and for correcting a frequency error of a frequency used for the demodulation process by the demodulating unit based on the carrier wave frequency error detected by the detecting unit; and a control unit which controls a setting of an initial value of a frequency in the demodulation process by the demodulating unit by means of the frequency control unit after a receiving channel is switched, based on the carrier wave frequency error before a receiving channel is switched, the error being detected by the detecting unit, when a receiving channel is switched.
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公开(公告)号：DE69924804D1
公开(公告)日：2005-05-25
申请号：DE69924804
申请日：1999-02-19
Applicant: SONY CORP
Inventor： IKEDA YASUNARI , OKADA TAKAHIRO
Abstract: An intermediate frequency signal of an OFDM signal received by a tuner (2) is multiplied by a carrier wave by a multiplier (3) and a multiplier (4) to thereby generate an OFDM signal in a base band. The OFDM signal in the base band is FFT processed by an FFT circuit (5) and a resultant signal is outputted to a dividing circuit (10) and a pilot signal extracting circuit (8) in an equalizing circuit (13). A pilot signal extracted by the pilot signal extracting circuit (8) is supplied to an interpolating filter (9) and subjected to an interpolating process. An amplitude component and a phase component in the pilot signal are supplied to the dividing circuit (10). The dividing circuit (10) divides the signal input from the FFT circuit (5) by the amplitude and phase supplied from the interpolating filter (9) and a resultant signal is output to a demapping circuit (11). An FFT window circuit (6) detects the length of the guard interval from outputs of the multipliers (3) and (4) and outputs the detection signal to a control circuit (21). The control circuit (21) controls the band width of the interpolating filter (9) in accordance with the length of the input guard interval, thereby suppressing deterioration in the equalizing characteristics by noises.
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公开(公告)号：AU2830100A
公开(公告)日：2000-09-21
申请号：AU2830100
申请日：2000-03-06
Applicant: SONY CORP
Inventor： OKADA TAKAHIRO , IKEDA YASUNARI
IPC: H04J11/00 , H04B1/04 , H04J20060101 , H04L5/06
Abstract: A transmission apparatus which prevents adversely affects from an adjacent channel even without provision of a guard band. An information sequence 1 input to a mapping unit 21 - 1 of the transmission apparatus is mapped onto predetermined signal points by QAM modulation, etc. and output to a frequency converter 22 - 1 . The frequency converter 22 - 1 converts the frequency according to a center frequency of an input signal and outputs the result to a multiplexer 23 . The other data series are processed in the same way as the data series 1 are output to the multiplexer 23 . The multiplexer 23 multiplexes a plurality of input signals, while an IFFT processor 24 performs an inverse Fourier transform on the multiplexed signals all at once. The inverse Fourier transformed signal is quadrature-modulated by a quadrature modulator 26 , converted to the RF band signal by the frequency converter 28 , and transmitted from an antenna 30.
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Patent Agency Ranking6.发明公开SIGNAL TRANSMITTER, SIGNAL RECEIVER, AND SIGNAL TRANSMITTING-RECEIVING METHOD 失效信号发送器，信号接收器和方法向/接收信号
公开(公告)号：EP0732832A4
公开(公告)日：2000-07-05
申请号：EP95930020
申请日：1995-08-31
Applicant: SONY CORP
Inventor： IKEDA TAMOTSU , IKEDA YASUNARI , OKADA TAKAHIRO
CPC classification number: H04L27/2604 , H04L1/0003 , H04L1/0017 , H04L1/0054 , H04L1/006 , H04L1/0065 , H04L5/0007 , H04L5/0042 , H04L5/0044 , H04L27/183 , H04L27/3488 , H04L2001/0098 , H04N5/4401 , H04N19/39 , H04N21/2383 , H04N21/4382 , Y02D50/10
Abstract: The present invention is used for example digital television broadcasting and provides a good television picture and sound where the signal level is large on the reception side and provides a television picture and sound of a certain degree of quality even in a case where the signal level is small. The signal transmitting apparatus (10) divides the series of input information in accordance with the significance of the content of the data to obtain a plurality of input signals, encodes the input signals with respectively different encoding rates, multiplexes the same at the time slots for transmission, modulates the same by multi-value modulation methods different for every time slot corresponding to the coded signals, and transmits the resultant data via the communication transmission line (20) such as a satellite communication channel to the signal receiving apparatus (30). The signal receiving apparatus (30) demodulates the respective coded signals from the modulated signals received from the communication transmission line (20) by demodulation methods different for every time slot corresponding to the coded signals contained in the received signals, demultiplexes the same, decodes the result, and reproduces the respective input signals.
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7.发明公开TRANSMISSION DEVICE, INFORMATION PROCESSING METHOD, PROGRAM, AND TRANSMISSION SYSTEM 审中-公开传动装置，信息处理程序及传输系统
公开(公告)号：EP2683161A4
公开(公告)日：2014-10-29
申请号：EP12751779
申请日：2012-02-22
Applicant: SONY CORP
Inventor： TAKAHASHI HIROO , MICHAEL LACHLAN BRUCE , YOKOKAWA TAKASHI , YOSHIMOCHI NAOKI , OKADA TAKAHIRO
CPC classification number: H04N5/38 , H04H20/77 , H04L1/0071 , H04L5/0048 , H04N21/2383 , H04N21/6118
Abstract: The present technology relates to a transmitter apparatus, an information processing method, a program, and a transmitter system capable of easily transmitting a wideband signal. The transmitter apparatus includes: a first acquisition unit that obtains first transmission control information; a second acquisition unit that obtains second transmission control information similar to information input to another transmitter apparatus; and a generating unit that processes transmission target data based on a parameter contained in the first transmission control information and generates data including the processed transmission target data and the second transmission control information. The present technology can be applied to a transmitter apparatus that transmits a DVB-C2 signal.
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8.发明专利
公开(公告)号：BR112013021380A2
公开(公告)日：2016-10-18
申请号：BR112013021380
申请日：2012-02-22
Applicant: SONY CORP
Inventor： TAKAHASHI HIROO , MICHEL LACHLAN BRUCE , YOSHIMOCHI NAOKI , OKADA TAKAHIRO , YOKOKAWA TAKASHI
IPC: H04N7/173
Abstract: aparelho transmissor, método de processamento de informação, programa, e, sistema transmissor esta técnica se relaciona a um dispositivo de transmissão, método de processamento de informação, programa, e sistema transmissor que torna possível transmitir facilmente sinais de banda larga. este dispositivo de transmissão é provido com uma primeira unidade de aquisição que adquire primeira informação de controle de transmissão; uma segunda unidade de aquisição que adquire segunda informação de controle de transmissão que é a mesma informação como aquela introduzida ao outro dispositivo de transmissão, e uma unidade de geração que processa dados a serem transmitidos conforme os parâmetros contidos na primeira informação de controle de transmissão, e gera dados configurados de ambos os dados dos dados supracitados a serem transmitidos que foram processados e da segunda informação de controle de transmissão supracita. esta técnica é capaz de aplicação a dispositivos de transmissão que transmitem sinais de dvb-c2.
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公开(公告)号：DE60128036D1
公开(公告)日：2007-06-06
申请号：DE60128036
申请日：2001-07-09
Applicant: SONY CORP
Inventor： HYAKUDAI TOSHIHISA , OKADA TAKAHIRO
Abstract: A demodulation method and apparatus applicable to, for example digital broadcast signals modulated in accordance with orthogonal frequency division multiplexing (OFDM), is provided with a means for maintaining synchronization of carrier frequency correction control of the OFDM signals in a stable manner. A holding circuit (14) verifies whether or not a wide range fc/Common Phase Error (CPE) calculating circuit (10) is making an erroneous detection operation. The holding circuit performs the verification based on the information indicating the demodulation reliability, such as the result of a cumulative addition of Carrier Phase (CP) values, supplied from the wide range fc error/CPE calculating circuit (10), or the transmission control signal detection information, supplied from the transmission control information demodulating communication (17). If the wide range fc error CPE calculating circuit (10) is making an erroneous detection operation, the holding circuit (14) outputs the wide range fc error output in the previous symbol, without updating the information on the wide range fc error.
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公开(公告)号：DE69924804T2
公开(公告)日：2006-02-23
申请号：DE69924804
申请日：1999-02-19
Applicant: SONY CORP
Inventor： IKEDA YASUNARI , OKADA TAKAHIRO
Abstract: An intermediate frequency signal of an OFDM signal received by a tuner (2) is multiplied by a carrier wave by a multiplier (3) and a multiplier (4) to thereby generate an OFDM signal in a base band. The OFDM signal in the base band is FFT processed by an FFT circuit (5) and a resultant signal is outputted to a dividing circuit (10) and a pilot signal extracting circuit (8) in an equalizing circuit (13). A pilot signal extracted by the pilot signal extracting circuit (8) is supplied to an interpolating filter (9) and subjected to an interpolating process. An amplitude component and a phase component in the pilot signal are supplied to the dividing circuit (10). The dividing circuit (10) divides the signal input from the FFT circuit (5) by the amplitude and phase supplied from the interpolating filter (9) and a resultant signal is output to a demapping circuit (11). An FFT window circuit (6) detects the length of the guard interval from outputs of the multipliers (3) and (4) and outputs the detection signal to a control circuit (21). The control circuit (21) controls the band width of the interpolating filter (9) in accordance with the length of the input guard interval, thereby suppressing deterioration in the equalizing characteristics by noises.
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