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21.发明公开Circuit de comparaison de signaux haute fréquence modulés en amplitude 失效Vergleichsschaltungfürin Amplitude modulierte Hochfrequenzsignale。
公开(公告)号：EP0413644A1
公开(公告)日：1991-02-20
申请号：EP90420373.4
申请日：1990-08-09
摘要： La présente invention concerne un circuit de comparaison adapté à un magnétoscope qui possède deux branches (41, 42) identiques dont l'une (41) est reliée à une tête d'un premier type et l'autre (42) à une tête d'un deuxième type, et dont chacune est connectée en sortie à une entrée d'un même moyen de comparaison (56) pour choisir en mode "recherche" celle des deux têtes qui présente l'amplitude de signal la plus grande. Chaque branche comprend, en série, un filtre passe-haut (45), un amplificateur (46) à gain variable, un multiplieur (47), un filtre passe-bas (48) et un amplificateur de capacité (49).
摘要翻译： 本发明涉及一种适用于具有两个相同分支（41,42）的视频记录器的比较器电路，其中一个（41）连接到第一类型的头部，另一个（42）连接到头部 第二类型，并且其每一个在输出端连接到单个比较器装置（56）的输入，用于以“搜索”模式选择表现出最大信号幅度的两个头中的一个。 每个分支串联包括高通滤波器（45），可变增益放大器（46），乘法器（47），低通滤波器（48）和电容放大器（49）。 ...
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公开(公告)号：EP0385867A2
公开(公告)日：1990-09-05
申请号：EP90400566.7
申请日：1990-02-28
申请人： SONY CORPORATION
发明人： Inoue, Hajime, c/o SONY CORPORATION , Seki, Takahito, c/o SONY CORPORATION , Kanota, Keiji, c/o SONY CORPORATION
CPC分类号： H04N5/931 , G11B20/10009 , G11B20/10527 , H04N5/926
摘要： A magnetic recording and/or reproducing device uses a viterbi decoding circuit (40, 41) wherein, when data falls within a predetermined range, the level of the reproduced signal is corrected in a manner which reduces bit error caused by noise in the reproduced signal. Alternatively, the value of a previous video signal value is corrected in accordance with the amount of change in an instant signal value.
摘要翻译： 磁记录和/或再现装置使用维特比解码电路（40,41），其中当数据落在预定范围内时，再现信号的电平以减少由再现信号中的噪声引起的位误差的方式被校正 。 或者，根据瞬时信号值的变化量来校正先前视频信号值的值。
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公开(公告)号：EP0372490A2
公开(公告)日：1990-06-13
申请号：EP89122403.2
申请日：1989-12-05
IPC分类号： G11B27/038 , H04N5/91 , H04N5/93
CPC分类号： H04N5/937 , G11B27/032 , G11B27/038 , G11B2220/90 , H04N5/9305 , H04N5/931
摘要： A method and apparatus for processing image signals read out from a recording medium (31) in which different kinds of image signals are stored. One frame of the image signals from the recording medium is stored (20) in sequence until a time at which the kind of image signals is switched (26-29). The stored image signals are read out and the level thereof are gradually decreased (21) from the switched time, and simultaneously the level of the image signals read out from the recording medium subsequent to the stored image signals are gradually increased (19). Then, the level of the decreased image signals are added (22) with the level of the increased image signals.
摘要翻译： 一种用于处理从其中存储不同种类的图像信号的记录介质（31）读出的图像信号的方法和装置。 来自记录介质的图像信号的一帧依次存储（20）直到图像信号的种类被切换的时间（26-29）。 存储的图像信号被读出，其电平从切换时间逐渐减小（21），并且同时在存储的图像信号之后从记录介质读出的图像信号的电平逐渐增加（19）。 然后，降低的图像信号的电平与增加的图像信号的电平相加（22）。
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公开(公告)号：EP0175346A2
公开(公告)日：1986-03-26
申请号：EP85111745.7
申请日：1985-09-17
发明人： Yagi, Motoi , Miyabayashi, Tadao
IPC分类号： H04N5/93
CPC分类号： H04N5/931 , Y10S348/91
摘要： © A television composite video signal processing circuit has a readout circuit (21 to 24) for repeatedly reading out a one-field composite video signal from a disk memory; a delay circuit (25) for delaying the composite video signal from the readout circuit (21 to 24) by 1/2 of a horizontal sync signal period H, a pedestal clamping circuit (31, 32, 34, C5) for setting the pedestal levels of the composite video signals from the delay circuit (25) and the readout circuit (21 to 24) to a predetermined level, a signal selector (Tr1, Tr2, 28, R27) for alternately supplying the composite video signals from the readout circuit (21 to 24) and the delay circuit (25) to the pedestal clamping circuit (31,32,34, C5) for every other field, and a peak level correction circuit for correcting peak the level of the delayed video signal in the delayed composite video signal from the delay circuit (25). The peak level correction circuit (PLD1, PLD2, 26, 27, 29, 30) corrects the peak level of the delayed video signal from the dely circuit (25) so as to match this peak level with that of the nondelayed video signal from the readout circuit (21 to 24) in accordance with a peak level difference between the delayed and nondelayed video signals.
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25.发明授权Recording signal control apparatus capable of optimizing recording conditions for magnetic recording medium 失效记录信号控制装置适合于优化记录条件的磁记录介质
公开(公告)号：EP0935239B1
公开(公告)日：2005-01-26
申请号：EP99200765.8
申请日：1993-10-19
CPC分类号： G11B15/07 , G11B5/00813 , G11B5/0086 , G11B5/02 , G11B5/035 , G11B15/02 , G11B15/06 , G11B15/087 , G11B23/08714 , H04N5/782 , H04N5/923 , H04N5/931 , H04N17/06
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26.发明公开Recording signal control apparatus capable of optimizing recording conditions for magnetic recording medium 失效记录信号控制装置适合于优化记录条件的磁记录介质
公开(公告)号：EP0935239A3
公开(公告)日：2001-09-26
申请号：EP99200765.8
申请日：1993-10-19
CPC分类号： G11B15/07 , G11B5/00813 , G11B5/0086 , G11B5/02 , G11B5/035 , G11B15/02 , G11B15/06 , G11B15/087 , G11B23/08714 , H04N5/782 , H04N5/923 , H04N5/931 , H04N17/06
摘要： A plurality of test signals (f1,f2) of different frequencies are recorded on a magnetic recording medium (9) while gradually increasing or decreasing recording current (7), and the variation of the level of each of the replayed test signals (f1,f2) and the variation of the recording current are stored in a memory. From these variations, the amount of detail emphasis and/or the frequency characteristic of a recording equalizer (4) and/or the recording current value for optimum recording of video signals are calculated and stored in another memory, and based on the thus stored optimum data for the magnetic recording medium displayed on display means, a detail emphasis circuit (1), a recording equalizer frequency correction circuit, and a recording current value setting circuit are controlled singly or in any combination thereof, thereby controlling one or other or any combination of three factors, i.e. the amount of detail emphasis that the detail emphasis circuit (1) applies, the frequency characteristic of the recording equalizer (4), and the gain of a recording amplifier (7) for FM signal recording.
摘要翻译： 不同频率的测试信号的多个被记录在磁记录介质上，同时逐渐递增或递减的记录电流，并且每个重放测试信号和记录电流的变化的电平的变化被存储在存储器中。 从合成的变化，细节强调的量和/或记录均衡器和/或视频信号的最佳记录的记录电流值的频率特性被计算并存储在另一存储器中，并且基于用于所述这样存储最佳数据 显示在显示器装置，细节强调电路，记录均衡器频率校正电路，和一个记录电流值设定电路的磁记录介质可以单独使用或以任何组合来控制它们，从而控制一个或另一个或三个因素的任意组合，即 细节强调的量做的细节强调电路适用，记录均衡器的频率特性，以及用于FM信号记录的记录放大器的增益。
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27.发明授权Recording signal control apparatus capable of optimizing recording conditions for magnetic recording medium 失效记录信号控制装置适合于优化记录条件的磁记录介质
公开(公告)号：EP0594407B1
公开(公告)日：2000-02-16
申请号：EP93308325.5
申请日：1993-10-19
CPC分类号： G11B15/07 , G11B5/00813 , G11B5/0086 , G11B5/02 , G11B5/035 , G11B15/02 , G11B15/06 , G11B15/087 , G11B23/08714 , H04N5/782 , H04N5/923 , H04N5/931 , H04N17/06
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28.发明公开Recording signal control apparatus capable of optimizing recording conditions for magnetic recording medium 失效记录信号控制装置适合于优化记录条件的磁记录介质
公开(公告)号：EP0935239A2
公开(公告)日：1999-08-11
申请号：EP99200765.8
申请日：1993-10-19
CPC分类号： G11B15/07 , G11B5/00813 , G11B5/0086 , G11B5/02 , G11B5/035 , G11B15/02 , G11B15/06 , G11B15/087 , G11B23/08714 , H04N5/782 , H04N5/923 , H04N5/931 , H04N17/06
摘要： A plurality of test signals of different frequencies are recorded on a magnetic recording medium while gradually increasing or decreasing recording current, and the variation of the level of each of the replayed test signals and the variation of the recording current are stored in a memory. From these variations, the amount of detail emphasis and/or the frequency characteristic of a recording equalizer and/or the recording current value for optimum recording of video signals are calculated and stored in another memory, and based on the thus stored optimum data for the magnetic recording medium displayed on display means, a detail emphasis circuit, a recording equalizer frequency correction circuit, and a recording current value setting circuit are controlled singly or in any combination thereof, thereby controlling one or other or any combination of three factors, i.e. the amount of detail emphasis that the detail emphasis circuit applies, the frequency characteristic of the recording equalizer, and the gain of a recording amplifier for FM signal recording.
摘要翻译： 不同频率的测试信号（F1，F2）中的多个记录的磁性记录介质（9）上，同时逐渐递增或递减的记录电流（7），并且每个重放的测试信号的电平（f1的变化， F2）和记录电流的变化被存储在存储器中。 从合成的变化，细节强调的量和/或记录均衡器（4）和/的频率特性或者用于视频信号的最佳记录的记录电流值被计算并存储在另一存储器中，并且基于如此存储最佳 对于显示在显示装置上，一个细节强调电路（1），记录均衡器频率校正电路，和一个记录电流值设定电路的磁记录介质中的数据被单独地或以任何组合来控制它们，从而控制一个或另一个或任意组合 三个因素，即 细节强调的量做的细节强调电路（1）适用时，记录均衡器（4）的频率特性，以及用于FM信号记录记录放大器（7）的增益。
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30.发明公开Recording signal control apparatus capable of optimizing recording conditions for magnetic recording medium 失效记录适合于优化记录条件的磁记录介质的信号的控制装置。
公开(公告)号：EP0594407A3
公开(公告)日：1995-01-11
申请号：EP93308325.5
申请日：1993-10-19
CPC分类号： G11B15/07 , G11B5/00813 , G11B5/0086 , G11B5/02 , G11B5/035 , G11B15/02 , G11B15/06 , G11B15/087 , G11B23/08714 , H04N5/782 , H04N5/923 , H04N5/931 , H04N17/06
摘要： A plurality of test signals of different frequencies are recorded on a magnetic recording medium while gradually increasing or decreasing recording current, and the variation of the level of each of the replayed test signals and the variation of the recording current are stored in a memory. From these variations, the amount of detail emphasis and/or the frequency characteristic of a recording equalizer and/or the recording current value for optimum recording of video signals are calculated and stored in another memory, and based on the thus stored optimum data for the magnetic recording medium displayed on display means, a detail emphasis circuit, a recording equalizer frequency correction circuit, and a recording current value setting circuit are controlled singly or in any combination thereof, thereby controlling one or other or any combination of three factors, i.e. the amount of detail emphasis that the detail emphasis circuit applies, the frequency characteristic of the recording equalizer, and the gain of a recording amplifier for FM signal recording.
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