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71. 发明授权

US3805285A Signal modulating and demodulating system with means for making the upper and lower side-bands assymmetrical 失效
标题翻译：信号调制和解调系统，用于制造上，下三层组合
公开(公告)号：US3805285A
公开(公告)日：1974-04-16
申请号：US24741972
申请日：1972-04-25
申请人： VICTOR CO LTD
发明人： KINJO H , OKANO K
IPC分类号： H04N5/92 , H04N9/82 , G11B5/82 , G11B5/04 , H04N5/78
CPC分类号： H04N9/82 , H04N5/92
摘要： A signal modulating and demodulating system generally comprises means for amplitude modulating at least a part of a signal, means for making the upper and lower side-bands of the amplitude modulated wave asymmetrical, and means for frequency demodulating the amplitude modulated wave having asymmetrical upper and lower side-bands. By magnetically recording and reproducing the amplitude modulated wave, it has its upper and lower side-bands made asymmetrical due to an electromagnetic conversion characteristic and is converted into a frequency modulated wave.
摘要翻译：信号调制和解调系统通常包括用于幅度调制信号的至少一部分的装置，用于使幅度调制波的上侧和下侧波段不对称的装置，以及用于频率解调具有不对称上和较低的边带。通过磁记录和再现调幅波，由于电磁转换特性，其上下边带变得不对称，并被转换成调频波。

72. 发明授权

US3728475A Beat signal suppression system for a system for transmitting a frequency modulated wave or a device for recording and reproducing a frequency modulated wave 失效
标题翻译：用于发送频率调制波的系统的BEAT信号抑制系统或用于记录和再现频率调制波的装置
公开(公告)号：US3728475A
公开(公告)日：1973-04-17
申请号：US3728475D
申请日：1970-07-06
申请人： VICTOR COMPANY OF JAPAN
发明人： INOUE Y , MORITA A
IPC分类号： H04N5/92 , H04N5/923 , H04N9/82 , H04N5/78 , G11B5/04
CPC分类号： H04N9/82 , H04N5/92 , H04N5/923
摘要： A system for transmitting or recording and reproducing a frequency modulated wave suppresses beats produced by a carrier wave and a signal component of high energy level distribution, which is disposed in a range of higher frequencies of a wave signal. A frequency component, which is liable to be reproduced as a beat signal, is subjected to pre-emphasis. A demodulated signal obtained by demodulating the frequency modulated signal is subject to deemphasis with a characteristic opposite to the preemphasis characteristics applied to the wave signal. Thus the frequency-phase characteristics of the signals is uniform throughout the system, whereby the influence exerted by moire beat interference on the demodulated signal can be minimized.
摘要翻译：用于发送或记录和再现频率调制波的系统抑制由波形产生的节拍和高能量分布的信号分量，其布置在波信号的较高频率的范围内。容易被再现为拍频信号的频率分量经受预加重。通过对频率调制信号进行解调而获得的解调信号以与对波信号的预加重特性相反的特性进行去加重。因此，信号的频率相位特性在整个系统中是均匀的，由此可以最小化由莫尔条纹干扰对解调信号的影响。

73. 发明授权

US3631422A System for detection of data time interval measurement 失效
标题翻译：用于检测数据时间间隔测量的系统
公开(公告)号：US3631422A
公开(公告)日：1971-12-28
申请号：US3631422D
申请日：1969-02-03
申请人： IBM
发明人： KRAJEWSKI WILLIAM F , PADALINO MARCO , PAULSON DAVID H
IPC分类号： H03M5/14 , G06K7/00 , G11B20/14 , H04L25/49 , G11B5/04
CPC分类号： G11B20/1423
摘要： A system is provided in which data processed in digitally encoded form is detected using an inverse algorithm of the encoding process and the predictable nature of errors which may be introduced by the processing media. In one example, a measurement of the time interval between each adjacent pair of data signal transitions derived from a magnetic recording media is adjusted to compensate for speed variations of the recording media, and the adjusted measurement is categorized according to the predictable nature of bit shift introduced by the recording media. Logic circuitry responds to each categorized time interval measurement to determine the data denoted thereby in terms of data detected from the immediately preceding time interval.

74. 发明授权

US3626397A Displacement measuring instrument 失效
公开(公告)号：US3626397A
公开(公告)日：1971-12-07
申请号：US3626397D
申请日：1969-09-30
申请人： SONY CORP
发明人： UEMURA SABURO
IPC分类号： G01D5/245 , G01D5/12 , H03M1/00 , G11B5/04 , G01R33/00
CPC分类号： G01D5/12 , H03M1/30
摘要： A displacement measuring instrument having means for producing a carrier signal, a transducer supplied with the carrier signal from the above means to phase modulate the carrier signal in accordance with a displacement, means for multiplying the phasemodulated signal, means for demodulating the multiplied, phasemodulated signal and means for counting the displacement with the demodulated signal.

75. 发明授权

US3603942A Predifferentiated recording 失效
标题翻译：预先记录
公开(公告)号：US3603942A
公开(公告)日：1971-09-07
申请号：US3603942D
申请日：1969-01-13
申请人： IBM
发明人： HEIDECKER ROBERT F
IPC分类号： G11B5/09 , G11B20/10 , G11B5/04
CPC分类号： G11B20/10
摘要： System and method for magnetic recording to produce a read voltage having transitions such as zero crossings representing the recorded data. No differentiation of the read voltage is necessary. High frequency switching of the write current is used at times to maintain the read voltage at a nearly constant amplitude, as well as producing the desired read data transitions.

76. 发明授权

US3597752A Fm magnetic recording and sensing utilizing bit periods of different lengths 失效
标题翻译： FM磁记录和感测利用不同长度的比特周期
公开(公告)号：US3597752A
公开(公告)日：1971-08-03
申请号：US3597752D
申请日：1969-09-17
申请人： BURROUGHS CORP
发明人： ELDERT CORNELIUS , QUIOGUE VIRGILIO J
IPC分类号： H03K9/06 , G06F7/02 , G11B20/10 , G11B20/14 , H03M7/00 , H04L27/156 , G11B5/04
CPC分类号： G11B20/1411 , G06F7/02 , G11B20/10009
摘要： A method and apparatus for recording or sensing digital data on a magnetizable surface, for example, a magnetic stripe. The method utilizes bit periods of different lengths to represent binary coded ''''1''s'''' and ''''0''s'''' respectively. The presence of a binary ''''1'''' or an ''''0'''' on the magnetic surface is determined by a threshold value, i.e., in the digital mode a binary count which is computed as a function of the period of at least one preceding data bit for binary comparison with the period duration of the data bit being sensed.

77. 发明授权

US3499124A Fm recording and reproducing arrangement with single carrier and proportional compensation 失效
标题翻译： FM记录和再现与单载体和比例补偿的安排
公开(公告)号：US3499124A
公开(公告)日：1970-03-03
申请号：US3499124D
申请日：1966-11-07
申请人： IBM
发明人： WORTZMAN DONALD
IPC分类号： A61B5/0436 , G06G7/60 , G11B20/22 , G11B5/04
CPC分类号： G11B20/225 , A61B5/0436 , G06G7/60

78. 发明授权

US3492441A Bandwidth reduction system for a magnetic recorder 失效
标题翻译：磁记录仪的带宽减少系统
公开(公告)号：US3492441A
公开(公告)日：1970-01-27
申请号：US3492441D
申请日：1967-07-03
申请人： BALL BROTHERS RES CORP
发明人： JAMES DONALD N
IPC分类号： G11B23/00 , H04N5/919 , G11B5/02 , G11B5/04
CPC分类号： G11B23/0007 , H04N5/919

79. 发明授权

US3449733A Methods and apparatus for use in the industrial magnetic materials art 失效
标题翻译：用于工业磁性材料的方法和装置
公开(公告)号：US3449733A
公开(公告)日：1969-06-10
申请号：US3449733D
申请日：1964-04-01
申请人： NAT STANDARD CO
发明人： BERQUIST LEONARD G
IPC分类号： G11B15/06 , G11B27/10 , G11B5/04 , B65H25/00 , G11B5/74
CPC分类号： G11B27/10 , G11B15/06

80. 发明公开

KR1019930016944A 레코드케리어상의 트렉에 정보신호을 기록하는 장치 失效
标题翻译：用于在记录载体上的轨道上记录信息信号的装置
公开(公告)号：KR1019930016944A
公开(公告)日：1993-08-30
申请号：KR1019930000463
申请日：1993-01-15
申请人： 코닌클리케 필립스 엔.브이.
发明人： 피에테르게리트반레외벤 , 알베르트마리아아르놀드리예카에르트
IPC分类号： G11B5/04
摘要： 레코드케리어(1)상의 트랙(To,T
1 ,...)에 정보신호를 기록하기 위한 장치는 입력(20)과, 신호처리수단(21)과, 카운팅수단(23)과, 기록수단(25,26,27) 및 운반수단(34,35)을 포함하며, 상기 입력(20)은 정보신호를 수신하기 위한 것이고, 상기 신호처리수단(21)은 트랙에 기록될 수 있도록 정보신호를 처리하기 위한 수단이며, 상기 카운팅 수단(23)은 결과적으로 상이한 카운트신호를 발생하여 그카운트신호를 출력(24)으로 공급하기 위한 수단이고, 상기 기록수단(25,26,27)은 레코드케리어상의 트랙에 신호처리된 정보신호를 기록하고, 또한 레코드케리어상의 트랙에 카운트 신호를 기록하기 위해 최소한 하나의 기록용 헤드를 갖는 수단이며, 그리고 상기 운반수단(34,35)은 레코드케리어의 횡방향으로 임의의 운반속도(V
t )를 갖고 레코드케리어를 운반하기 위한 수단이 .
상기 카운팅수단(23)은 카운팅신호를 공급하기 위하여 채택되며, 레코드케리어의 횡방향의 관점으로, 기록하는 동안의 운반속도의 값과는 무관하게, 상기 레코드케리어(제3도, 제4도)상의 실질적으로 고정된 위치에 카운트 신호가 기록되도록 한다.
또한, 매초당 25개의 화면을 기초로한 제1영상신호와 매초당 30개의 화면을 기초로한 제2영상신호를 기록할 수 있는 장치의 경우에 있어서, 카운트신호발생기에 의한 결과적으로 상이한 카운트신호의 공급을 Fs와 결과적으로 상이하게 발생된 카운트신호들간의 차이인 D사이에 다음의 관계식이 존재한다.Fs×D=상수 이식은 제1영상신호는 물론 제2영상신호의 기록에 대한 것이며, 여기서 운반속도는 일정하게 유지되어 왔다.

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