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1.发明公开SIGNAL DETECTION METHOD AND DEVICE, AND INFORMATION REPRODUCTION DEVICE AND METHOD 审中-公开信号检测方法的设置和信息重放设备和方法
公开(公告)号：EP1667139A4
公开(公告)日：2008-12-10
申请号：EP04746081
申请日：2004-06-11
Applicant: CHO YASUO , PIONEER CORP
Inventor： CHO YASUO , ONOE ATSUSHI
CPC classification number: B82Y10/00 , G11B9/02 , G11B9/08 , G11B9/14 , G11B11/08 , G11B20/06 , G11B20/10009
Abstract: This signal detection method detects an output signal indicating data information contained at least in two sideband waves from an input signal having a carrier and at least two sideband waves accompanying the carrier. The method includes a cut off step (32) for cutting off a sideband wave positioned at the high frequency side or the low frequency side as compared to the carrier from the at least two sideband waves and a square detection step (33) for outputting an output signal by performing square detection of an input signal having one of the sideband waves which has been cut off.
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公开(公告)号：EP0486322A3
公开(公告)日：1992-09-02
申请号：EP91310571.4
申请日：1991-11-15
Applicant: KABUSHIKI KAISHA TOSHIBA
CPC classification number: H04N5/78213 , G11B20/06 , H04N9/802
Abstract: An automatic filter adjusting apparatus for adjusting an adjustable filter (34) having an input and an output. The apparatus includes a reference signal provider (32) for providing an FM signal to the filter (34), an adjusting signal generator (45, 44, 35) for providing an adjusting signal to the filter (34), a comparator (40) for comparing the output of the filter (34) to a reference level and a controller (41, 42, 43) responsive to the comparator (40) for controlling the adjusting signal generator (45, 44, 35).
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公开(公告)号：EP0486322A2
公开(公告)日：1992-05-20
申请号：EP91310571.4
申请日：1991-11-15
Applicant: KABUSHIKI KAISHA TOSHIBA
CPC classification number: H04N5/78213 , G11B20/06 , H04N9/802
Abstract: An automatic filter adjusting apparatus for adjusting an adjustable filter (34) having an input and an output. The apparatus includes a reference signal provider (32) for providing an FM signal to the filter (34), an adjusting signal generator (45, 44, 35) for providing an adjusting signal to the filter (34), a comparator (40) for comparing the output of the filter (34) to a reference level and a controller (41, 42, 43) responsive to the comparator (40) for controlling the adjusting signal generator (45, 44, 35).
Abstract translation: 一种用于调节具有输入和输出的可调节过滤器（34）的自动过滤器调节装置。 该装置包括用于向滤波器（34）提供FM信号的参考信号提供器（32），用于向滤波器（34）提供调整信号的调整信号发生器（45,44,35），比较器（40） 用于将滤波器（34）的输出与参考电平进行比较，以及响应于比较器（40）控制调节信号发生器（45,44,35）的控制器（41,42,43）。
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公开(公告)号：EP0171288A3
公开(公告)日：1987-09-09
申请号：EP85305614
申请日：1985-08-07
Applicant: FUJI PHOTO FILM CO., LTD.
Inventor： Kiyotaka, Kaneko c/o Fuji Photo , Chikuni Kawakami c/o Fuji Photo , Yasuhito, Kobayashi c/o Fuji Photo
IPC: H04N05/781 , H04N05/92
CPC classification number: G11B20/1883 , G11B5/012 , G11B5/02 , G11B20/06 , G11B2220/20 , H04N1/2112 , H04N9/88 , H04N2101/00
Abstract: In a magnetic recording method in which, for the purpose of tracking, a signal having a predetermined frequency is extracted from a reproduced FM recording signal recorded on a magnetic recording medium, and the magnetic head is brought to a position where the amplitude of the signal of predetermined frequency becomes substantially maxim; an FM recording signal recorded on a track of the recording medium is reproduced immediately after the recording, when dropout is detected in the recorded signal, a signal having a frequency other than the predetermined frequency is recorded on the same track in a relation superposed on the recorded signal, and the same recording signal as that recorded already on the dropout-including track is recorded on another track which may be the next adjacent track again.
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公开(公告)号：EP0163428A1
公开(公告)日：1985-12-04
申请号：EP85303028.6
申请日：1985-04-29
Applicant: VICTOR COMPANY OF JAPAN, LIMITED
Inventor： Ishigaki, Yukinobu , Namiki, Yasuomi , Fujiwara, Hisashige , Hirohashi, Kazutoshi
IPC: G11B20/22
Abstract: @ A rotary head type magnetic recording and reproducing apparatus comprises a circuit (20, 26) for recording and reproducing a signal on and from a magnetic recording medium (25) by rotary heads (23a, 23b), a circuit (14, 15) for obtaining a frequency modulated (FM) audio signal by frequency-modulating a carrier by an audio signal (Se, Sr) which is to be recorded, a circuit (19) for generating a frequency drift detection signal having a constant frequency which does not exist within a frequency range occupied by the FM audio signal, a circuit (16) for obtaining a frequency multiplexed signal by frequency-multiplexing the FM audio signal and the detection signal, a circuit (27, 28, 33) for separating the FM audio signal and the detection signal from the signal reproduced by the rotary heads, a demodulating circuit (29, 30) for obtaining an audio signal by frequency-demodulating the separated FM audio signal, a detecting circuit (34) for frequency-demodulating the separated detection signal and for detecting a frequency drift component, a circuit (35) for forming a frequency drift correction signal responsive to the output of the detecting circuit, and a circuit (31, 32) for correcting a frequency drift component in the output audio signal of the demodulating circuit by the correction signal.
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Patent Agency Ranking
公开(公告)号：EP0024390A1
公开(公告)日：1981-03-11
申请号：EP79901455.0
申请日：1979-04-02
Applicant: RIDDLE Jr., Herbert S.
Inventor： RIDDLE Jr., Herbert S.
CPC classification number: G11B23/0007 , G11B20/06 , G11B20/22
Abstract: Appareil ameliore de reduction du bruit dans un flux de donnees a frequence modulee du type utilisant un flux de reference d'une frequence predeterminee qui a ete soumis essentiellement au meme bruit. Dans un mode preferentiel de realisation de l'appareil, le flux de donnees est transforme par un premier discriminateur (52) en un premier signal d'une valeur proportionnelle a la frequence du flux de donnees, et le flux de reference est transforme par un second discriminateur (53) en un second signal qui possede une valeur proportionnelle au produit de la frequence du flux de reference soit une valeur de reaction (41). La valeur de reaction est derivee d'une combinaison des premier et second signaux dans un combinateur (44). L'une des utilisations importantes de l'appareil concerne les systemes d'enregistrement sur bande a modulation de frequence.
Abstract translation: 使用基本上经受相同噪声的预定频率的参考流的类型的调制频率数据流中的改进的降噪装置。 在该装置的一个优选实施例中，数据流由第一鉴别器（52）转换成一个值成正比的数据流的频率的第一信号，和参考该流是由转化 第二鉴别器（53）转换为具有与参考流的频率的乘积成比例的值的第二信号是反应值（41）。 反应值由组合器（44）中的第一和第二信号的组合导出。 该设备的重要用途之一是频率调制磁带记录系统。
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公开(公告)号：EP0559494A3
公开(公告)日：1994-12-07
申请号：EP93301694.1
申请日：1993-03-05
Applicant: PIONEER ELECTRONIC CORPORATION
Abstract: This invention relates to a crosstalk detecting apparatus for detecting crosstalk which possibly occurs when reading an image signal which has been FM-modulated and recorded on a recording medium, and more specifically, a crosstalk detecting apparatus which derives an amount of crosstalk from an adjacent track based on a signal read by a pickup in a simple construction. The cross-talk detecting apparatus according to the present invention is adapted to detect crosstalk during a period in which an identification signal recorded on a medium is being read therefrom, and comprises an FM-demodulator (1) for demodulating a signal read from the medium, an AM-demodulator (2) for reading the signal read from the medium, a multiplier circuit (4) for multiplying a signal outputted from the FM-demodulator (1) with a signal outputted from the AM-demodulator (3) and an averaging circuit (6) for averaging output values of the multiplier circuit (4).
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公开(公告)号：EP0351845B1
公开(公告)日：1994-11-30
申请号：EP89113340.7
申请日：1989-07-20
Applicant: AKAI ELECTRIC CO., LTD.
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公开(公告)号：EP0559493A2
公开(公告)日：1993-09-08
申请号：EP93301693.3
申请日：1993-03-05
Applicant: PIONEER ELECTRONIC CORPORATION
CPC classification number: G11B20/06 , G11B7/0901 , G11B7/0956 , G11B20/22 , G11B21/085 , G11B27/3009
Abstract: This invention relates to a crosstalk detecting apparatus for detecting crosstalk which may occur upon reading an FM-modulated signal recorded on a recording medium. This crosstalk detecting apparatus outputs a crosstalk amount from an adjacent track based on a signal read by a pickup. On a medium from which this crosstalk detecting apparatus can detect crosstalk, an image signal and an identification signal are FM-modulated and recorded on each of three tracks adjacent to one another, and the FM-modulated identification signal is recorded on each of the three tracks such that initial phases of the FM-modulated identification signals are all made equal. Also, the crosstalk detecting apparatus comprises a timing pulse generator (3) for generating a pulse at a predetermined time within the identification signal period; a phase detecting means (4) for detecting the phase difference between the signal read from the central track and a crosstalk-free signal; and a sampling circuit (5) for sampling the output from the phase detecting means (4) when a timing pulse is generated by the timing pulse generator (3).
Abstract translation: 本发明涉及一种用于检测在读取记录在记录介质上的FM调制信号时可能发生的串扰的串扰检测装置。 该串扰检测装置基于由拾取器读取的信号从相邻的轨道输出串扰量。 在该串扰检测装置能够检测到串扰的介质上，图像信号和识别信号被FM调制并记录在彼此相邻的三个磁道中的每一个上，并且FM调制识别信号被记录在三个 使FM调制识别信号的初始相位都相等的轨迹。 此外，串扰检测装置还包括定时脉冲发生器（3），用于在识别信号周期内的预定时间产生脉冲; 相位检测装置（4），用于检测从中心轨道读取的信号与无串扰信号之间的相位差; 以及用于当定时脉冲发生器（3）产生定时脉冲时对来自相位检测装置（4）的输出进行采样的采样电路（5）。
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公开(公告)号：EP0163428B1
公开(公告)日：1990-07-18
申请号：EP85303028.6
申请日：1985-04-29
Applicant: VICTOR COMPANY OF JAPAN, LIMITED
Inventor： Ishigaki, Yukinobu , Namiki, Yasuomi , Fujiwara, Hisashige , Hirohashi, Kazutoshi
IPC: G11B20/22
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