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21. 发明专利

JP2002217861A DIGITAL SIGNAL RECEIVER 失效
公开(公告)号：JP2002217861A
公开(公告)日：2002-08-02
申请号：JP2001006611
申请日：2001-01-15
申请人： SANYO ELECTRIC CO
发明人： UENO NOBUFUMI , IWASAKI TOSHIYA , YUASA MASATOSHI
IPC分类号： H04H20/00 , H04H40/18 , H04J11/00 , H04L1/00 , H04N5/44 , H04N5/455 , H04N19/00 , H04N19/426 , H04N19/44 , H04N19/88 , H04H1/00 , H04N7/24
摘要： PROBLEM TO BE SOLVED: To provide a digital signal receiver with which memory capacity for an interleaving processing is reduced and processing corresponding to the switching of a modulation system can be performed. SOLUTION: The digital signal receiving device 2000 receives a signal, to which a time interleaving processing is performed and which is transmitted by varying a data modulation system for the respective groups of a plurality of segments in the respective symbols by OFDM system. An FFT part 108 performs fast Fourier transformation processing on a reception signal. A pre- demapping processing block 200 performs pre-demapping processing according to the corresponding modulation systems for the respective segments, when the modulation system is switched. A time de-interleaving processing part 140 performs a time de-interleaving processing being the inverse transformation of the time interleaving processing.

22. 发明专利

JP2002101142A DIGITAL BROADCASTING DEMODULATOR 失效
公开(公告)号：JP2002101142A
公开(公告)日：2002-04-05
申请号：JP2000288033
申请日：2000-09-22
申请人： SANYO ELECTRIC CO
发明人： YUASA MASATOSHI , NAKAJIMA HIROSHI , KITA SACHIKAZU
IPC分类号： H04N5/455 , H04L7/00 , H04L27/227 , H04L27/38
摘要： PROBLEM TO BE SOLVED: To provide a digital broadcasting demodulator capable of effectively carrier regenerating in a PSK demodulating circuit for demodulating a quasi- synchronous detected PSK modulation signal. SOLUTION: A synchronous detecting timer 44 outputs random data X to a random data generator 46 when a state in which a frequency synchronization is detected and a phase synchronization is not detected is continued for a predetermined period. A numeric value control oscillator 54 shifts the regenerated carrier by an amount in response to the random data X and the regenerated carrier falls in a phase leading-in range. Accordingly, a phase error detector 38 and a loop filter 50 are operated, and an accurate carrier can be effectively regenerated in a short time.

23. 发明专利

JP2001103503A DIGITAL COSTAS LOOP CIRCUIT AND CONTROL METHOD FOR IT 失效
公开(公告)号：JP2001103503A
公开(公告)日：2001-04-13
申请号：JP27558699
申请日：1999-09-29
申请人： SANYO ELECTRIC CO
发明人： YUASA MASATOSHI , KITA SACHIKAZU
IPC分类号： H04N9/45 , H03L7/093 , H04L27/22 , H04L27/227
摘要： PROBLEM TO BE SOLVED: To provide a digital Costas loop circuit that can decide a required frequency with high accuracy. SOLUTION: The digital Costas loop circuit 22 includes a phase difference detection circuit 22, which detects a phase difference on the basis of signals I', Q'. This digital Costas loop circuit first tentatively decides the frequency in the 8 PSK mode. That is, a synchronization detection circuit 30 detects presence of synchronization on the basis of a synchronous word signal included in a synchronizing signal part. When detecting the presence of synchornization, the synchronization detection detection circuit 30 sets a PBSK mode and decides the frequency on the basis of a TMCC signal included in the synchronizing signal part. That is, even when the presence of the synchronization is detected, the frequency is a little deviated from the accurate frequency, the deviation is corrected in the BPSK mode. Since the frequency is tentatively decided in the 8 PSK mode and then the frequency is decided in the BPSK mode, the frequency can accurately be decided.

24. 发明专利

JPH09326987A DIGITAL BROADCAST RECEIVER 失效
公开(公告)号：JPH09326987A
公开(公告)日：1997-12-16
申请号：JP14533196
申请日：1996-06-07
申请人： SANYO ELECTRIC CO
发明人： MATSUMOTO KIMIO , KOIKE MASANOBU , FURUKAWA KIMIHIKO , AWANO SEIJI , YUASA MASATOSHI , MIHARA YOSHIKAZU
IPC分类号： H04N5/7826 , H04H20/00 , H04H20/28 , H04H20/74 , H04H60/27 , H04H60/39 , H04H60/65 , H04N5/44 , H04N5/76 , H04N5/765 , H04N5/91 , H04N5/92 , H04N7/08 , H04N7/081 , H04H1/00
摘要： PROBLEM TO BE SOLVED: To attain accurate video recording by separating program information and additional information from a digital broadcast signal, selecting a desired program based on the separated information and sending video recording reservation and video recording start instruction. SOLUTION: As soon as program information as to a plurality of programs included in a received ELT is stored in a program information storage memory 8, a reservation operation menu is displayed on a monitor 12. When a reservation button displayed on the monitor 12 is selected by key operation, the video recording reservation procedure is executed and a channel number and a program code of a program going to be reservation video recording are stored in a reservation information memory 10. In the video recording control mode, whether or not the program code acquired from the additional information and the program code stored in the reservation information storage memory 10 are coincident is discriminated and the reservation video recording is started. Accurately video recording is conducted by selecting a desired program through the reception of the program code in this way to start the reservation video recording.

25. 发明专利

JPH09261548A DIGITAL BROADCASTING RECEIVER 失效
公开(公告)号：JPH09261548A
公开(公告)日：1997-10-03
申请号：JP6398096
申请日：1996-03-21
申请人： SANYO ELECTRIC CO
发明人： MIHARA YOSHIKAZU , AWANO SEIJI , YUASA MASATOSHI
IPC分类号： H04H20/00 , H04N5/44 , H04N7/08 , H04N7/081 , H04N7/173 , H04H1/00
摘要： PROBLEM TO BE SOLVED: To enable an operation approximate to a VTR by deciding a channel based on relative delay time and interruption time with a viewing channel at the beginning as a reference, and switching the channel to this decided channel in the case of restart after the interruption of viewing. SOLUTION: Desired video, audio and control data are separated from digital data by a data separating circuit 4 and according to the decoded results of the separated control data and operation input data from an operation input device 8, the entire device is controlled. When performing a pause operation, the program delay information of the channel under viewing at present and the current time are stored. When a pause ending operation is performed, the passage of time from the stored current time, namely, the interruption time is calculated and the program delay information of all the channels broadcasting the same program is possessed and stored. Then, the program delay information is retrieved and based on the relative delay time with the viewing channel at the beginning as a reference, any channel is selected.

26. 发明专利

JPH09252327A DIGITAL DEMODULATOR 失效
公开(公告)号：JPH09252327A
公开(公告)日：1997-09-22
申请号：JP5949496
申请日：1996-03-15
申请人： SANYO ELECTRIC CO
发明人： YUASA MASATOSHI
IPC分类号： H03L7/08 , H04L27/38
摘要： PROBLEM TO BE SOLVED: To provide a costas digital demodulator in which the number of components is reduced and multi-value QAM(quadrature amplitude modulation) demodulation, is attained with a simple configuration. SOLUTION: A lock detection circuit 28 in a costas digital demodulator 100 monitors the level of an in-phase demodulation signal and an orthogonal demodulation sigixal by a costas system to change a lock discrimination output into an active state in the asynchronization state A waveform shaping circuit 40 repeats a state of 'H' level or 'L' level for a prescribed time at intervals of a prescribed period to reference potential sets Vref-H and Vref-L fed to a loop filter 18. Accordingly a control voltage of a voltage controlled oscillator(VCO) is increased or decreased by a prescribed quantity and restores to a steady-state at a prescribed time constant. In response to a change in the signal V2c, when the phase lock state is retrieved, a lock discrimination signal is inactive and the mode restores to the usual operating mode.

27. 发明专利

JPH05206944A AUTOMATIC ADJUSTMENT DEVICE FOR OPTICAL MODULATION DEGREE OF ELECTRICITY-LIGHT CONVERSION DEVICE 失效
公开(公告)号：JPH05206944A
公开(公告)日：1993-08-13
申请号：JP3426092
申请日：1992-01-24
申请人： SANYO ELECTRIC CO
发明人： YAMAGATA TOYOMI , YUASA MASATOSHI
IPC分类号： H04B10/516 , H04B10/07 , H04B10/2507 , H04B10/61
摘要： PURPOSE:To always output an optical signal with an optimum light modulation rate by providing a means detecting an input signal level and increasing/ decreasing the light modulation rate of a light modulation means in accordance with the increase/decrease of the input signal level. CONSTITUTION:A peak detector 4 inputting the output of an automatic gain controller AGC1 is provided. The output levels VL-VH of AGC1, in which the operation area of the light-emitting element of an electricity-light converter 2 becomes optimum, are stored. When the level range of an input signal becomes small and the output level of AGC1 becomes smaller than VL-VH, the detector 4 outputs an AGC control signal and increases the amplification factor of AGC1. When the output level of AGC1 becomes larger than VL-VH on the other hand, the detector 4 outputs the signal and reduces the amplification factor of AGC1. Thus, the operation range of the light-emitting element is adjusted and the optical signal can be outputted with the optimum light modulation rate.

28. 发明专利

JPH0352163A MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH0352163A
公开(公告)日：1991-03-06
申请号：JP18806089
申请日：1989-07-20
申请人： SANYO ELECTRIC CO
发明人： YUASA MASATOSHI
IPC分类号： G11B15/087 , G11B20/10 , G11B27/22
摘要： PURPOSE:To prevent a cue signal from being erroneously detected at the time of reproducing even though the cue signal is recorded on an auxiliary track by providing a pre-reproducing head for reproducing the cue signal on the upstream side of a recording and reproducing head. CONSTITUTION:The pre-reproducing head 32 is provided between a full erasing head 28 and a tension guide 18. The head 32 detects the signal on the auxiliary track 54. A sound erasing head 34, a sound/control head 36 and a monitor head 38 are provided on the downstream side of a roller guide 26. At the time of performing the reproducing action for a magnetic tape 16, the cue signal recorded on the track 54 is detected by the head 32 first. Thereafter, the cue signal is detected by the head 36 after specified time. When the cue signal is detected by the head 32 and the head 36, it is judged that the cue is recorded on the auxiliary track.

29. 发明专利

JPH01124159A ENCODING SIGNAL DISCRIMINATOR 失效
公开(公告)号：JPH01124159A
公开(公告)日：1989-05-17
申请号：JP28272387
申请日：1987-11-09
申请人： SANYO ELECTRIC CO
发明人： YUASA MASATOSHI
IPC分类号： G11B20/10
摘要： PURPOSE:To surely perform discrimination by discriminating the presence/ absence of an encoding signal by the correct/incorrect state of an address signal. CONSTITUTION:The encoding signal is constituted of plural blocks, and each block consists of a means 6 to reproduce the address signal and the encoding signal on which an error detecting signal for the address signal is attached, a means 8 to discriminate the correctness/incorrectness of the address signal by using the error detecting signal, and a means 10 to discriminate the presence/ absence of the encoding signal corresponding to the correct/incorrect state of the address signal. In such a way, since the presence/absence of the encoding signal can discriminated by using a recorded address signal when it is the encoding signal, the discrimination can be performed surely.

30. 发明专利

JP2006108816A Receiver 有权
标题翻译：接收器
公开(公告)号：JP2006108816A
公开(公告)日：2006-04-20
申请号：JP2004289318
申请日：2004-09-30
申请人： Sanyo Electric Co Ltd , 三洋電機株式会社
发明人： YUASA MASATOSHI , YOSHINAGA MASAYUKI
IPC分类号： H04B1/10 , H03M1/18 , H04J11/00 , H04N5/44
摘要： PROBLEM TO BE SOLVED: To provide a receiver in which generation frequency of clipping due to an analog/digital converter can be suppressed. SOLUTION: A clipping detecting section 215 detects generating state of clipping based on the output signals from analog/digital converters 201 and 202. When generation frequency becomes high, a control section 203 controls a GCA (Gain Control Amplifier) 104 to reduce the amplitude of input signals to the analog/digital converters 201 and 202. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种可以抑制由于模拟/数字转换器产生的削波产生频率的接收机。解决方案：削波检测部分215基于来自模拟/数字转换器201和202的输出信号来检测削波的产生状态。当发生频率变高时，控制部分203控制GCA（增益控制放大器）104以减少模拟/数字转换器201和202的输入信号的幅度。（C）2006年，JPO和NCIPI

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