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1.发明授权Arrangement for reproducing a digital signal from a track on a magnetic record carrier having an equalizer filter in the form of a transconductance-capacitor filter 失效用于从具有跨导电容滤波器形式的均衡滤波器的磁记录载体上的轨道再现数字信号的装置公开(公告)号：US06252734B1
公开(公告)日：2001-06-26
申请号：US09526798
申请日：1994-10-13
IPC分类号： G11B5035
CPC分类号： G11B20/10046 , G11B5/035 , G11B20/10009 , H03J7/02
摘要： An arrangement for reproducing an electric signal from a track on a magnetic record carrier (2) includes a magnetic read head (1) for reading from the track an electric signal and for supplying the electric signal to an output, and automatic equalizer filter (5), including transconductance-capacitor filter (6). The transc-filter (6) has a tuning signal input (8). The equalizer filter (5) has a control signal input (15) and is adapted to automatically equalize the electric signal read from the track in response to a control signal supplied to its control signal input, and to supply an equalized output signal at its output (12). The tuning signal input of the transc-filter is coupled to the control signal input of the equalizer filter. The arrangement further includes a control signal generator (13,16) having an output (16) coupled to the control signal input (15) of the equalizer filter (5), the generator being adapted to generate a control signal and to supply the control signal to its output (16). The transconductance-capacitor filter (6) has a magnitude filter characteristic which increases with increasing frequencies in a frequency range below a reference frequency of the filter. The transconductance-capacitor filter is adapted to control the reference frequency in the filter characteristic in response to the control signal, so as to vary the angle of inclination of the filter curve below the reference frequency.
摘要翻译： 用于从磁记录载体（2）上的轨道再现电信号的装置包括：磁读头（1），用于从轨道读出电信号并将电信号提供给输出;以及自动均衡滤波器（5） ），包括跨导电容滤波器（6）。 转码滤波器（6）具有调谐信号输入（8）。 均衡器滤波器（5）具有控制信号输入（15）并且适于响应于提供给其控制信号输入的控制信号自动地平衡从轨道读取的电信号，并在其输出端提供均衡的输出信号 （12）。 转码滤波器的调谐信号输入耦合到均衡滤波器的控制信号输入端。 该装置还包括具有耦合到均衡器滤波器（5）的控制信号输入端（15）的输出端（16）的控制信号发生器（13,16），该发生器适于产生控制信号并提供控制信号 信号到其输出（16）。 跨导 - 电容滤波器（6）具有幅度滤波器特性，其在低于滤波器参考频率的频率范围内随着频率的增加而增加。 跨导电容滤波器适于响应于控制信号来控制滤波器特性中的参考频率，以便将滤波器曲线的倾斜角度改变到低于参考频率。
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2.发明授权Receiving arrangement including a variable equalizer, which variable equalizer is controlled on the basis of one or more signal portions produced by the variable equalizer 失效包括可变均衡器的接收装置，该可变均衡器基于由可变均衡器产生的一个或多个信号部分来控制
公开(公告)号：US5586144A
公开(公告)日：1996-12-17
申请号：US431879
申请日：1995-05-01
CPC分类号： G11B20/10175 , G11B20/10009 , G11B20/10046 , G11B20/10055 , H04L25/03133
摘要： An arrangement for producing a digital signal from an input (e.g., analog) signal obtained from a transmission medium. The arrangement includes a variable equalizer for equalizing the input signal as regards magnitude and phase as a function of frequency to produce an equalized signal, an equalizer control signal generator for generating first and second control signals for controlling the variable equalizer and a detector for producing the digital signal from the equalized signal. The arrangement further includes a bit array selector (i.e., a bit sequence detector) for generating one or two selection signals upon detection of one or more specific bit arrays (i.e., bit sequences) in the digital signal, and a sample-and-hold unit which samples one or more portions of the equalized signal under the influence of the one or two selection signals so as to produce at least one first sample value and at least one second sample value. The first and second control signals are derived in whole or in part from arithmetical combinations of the at least one first sample value and the at least one second sample value. The variable equalizer equalizes the input signal as regards magnitude in response to the first control signal and as regards phase in response to the second control signal.
摘要翻译： 一种用于从从传输介质获得的输入（例如模拟）信号产生数字信号的装置。 该装置包括一个可变均衡器，用于对作为频率的函数的幅度和相位的输入信号进行均衡以产生均衡的信号;均衡器控制信号发生器，用于产生用于控制可变均衡器的第一和第二控制信号;以及检测器， 来自均衡信号的数字信号。 该装置还包括位数组选择器（即，位序列检测器），用于在检测到数字信号中的一个或多个特定位数组（即，位序列）时产生一个或两个选择信号，以及采样和保持 单元，其在所述一个或两个选择信号的影响下对均衡信号的一个或多个部分进行采样，以产生至少一个第一采样值和至少一个第二采样值。 第一和第二控制信号全部或部分地由至少一个第一样本值和至少一个第二样本值的算术组合导出。 可变均衡器响应于第一控制信号的幅度和响应于第二控制信号的相位来均衡输入信号。
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3.发明授权Receiving arrangement including a variable equalizer which variable equalizer is controlled on the basis of one or more signal portions produced by the variable equalizer 失效接收装置包括可变均衡器，该可变均衡器基于由可变均衡器产生的一个或多个信号部分来控制可变均衡器
公开(公告)号：US5469462A
公开(公告)日：1995-11-21
申请号：US102077
申请日：1993-08-04
CPC分类号： G11B20/10175 , G11B20/10009 , G11B20/10046 , G11B20/10055 , H04L25/03133
摘要： An arrangement for producing a digital signal from an input (e.g., analog) signal obtained from a transmission medium. The arrangement includes a variable equalizer for equalizing the input signal as regards magnitude and phase as a function of frequency to produce an equalized signal, an equalizer control signal generator for generating first and second control signals for controlling the variable equalizer and a detector for producing the digital signal from the equalized signal. The arrangement further includes a bit array selector (i.e., a bit sequence detector) for generating one or two selection signals upon detection of one or more specific bit arrays (i.e., bit sequences) in the digital signal, and a sample-and-hold unit which samples one or more portions of the equalized signal under the influence of the one or two selection signals so as to produce at least one first sample value and at least one second sample value. The first and second control signals are derived in whole or in part from arithmetical combinations of the at least one first sample value and the at least one second sample value. The variable equalizer equalizes the input signal as regards magnitude in response to the first control signal and as regards phase in response to the second control signal.
摘要翻译： 一种用于从从传输介质获得的输入（例如模拟）信号产生数字信号的装置。 该装置包括一个可变均衡器，用于对作为频率的函数的幅度和相位的输入信号进行均衡以产生均衡的信号;均衡器控制信号发生器，用于产生用于控制可变均衡器的第一和第二控制信号;以及检测器， 来自均衡信号的数字信号。 该装置还包括位数组选择器（即，位序列检测器），用于在检测到数字信号中的一个或多个特定位数组（即，位序列）时产生一个或两个选择信号，以及采样和保持 单元，其在所述一个或两个选择信号的影响下对均衡信号的一个或多个部分进行采样，以产生至少一个第一采样值和至少一个第二采样值。 第一和第二控制信号全部或部分地由至少一个第一样本值和至少一个第二样本值的算术组合导出。 可变均衡器响应于第一控制信号的幅度和响应于第二控制信号的相位来均衡输入信号。
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4.再颁专利Apparatus for recording a count signal in a fixed location regardless of transport velocity of record carrier 有权用于在固定位置记录计数信号而不考虑记录载体的传送速度的装置公开(公告)号：USRE37817E1
公开(公告)日：2002-08-13
申请号：US09624642
申请日：2000-07-25
IPC分类号： G11B509
CPC分类号： G11B15/03 , G11B15/1875 , G11B15/467 , G11B20/1208 , G11B27/024 , G11B27/029 , G11B27/032 , G11B27/036 , G11B27/3027 , G11B27/32 , G11B2220/90 , H04N5/78266 , H04N5/9206 , H04N9/7925
摘要： An arrangement for recording an information signal in a track (T0, T1, . . . ) on a record carrier (1), includes an input (20) for receiving the information signal, signal processing circuitry (21) for processing the information signal such that it can be recorded in the track, counting device (23) for counting and for generating an array of subsequent different count signals and for supplying the count signals to an output (24), recording apparatus (25, 26, 27) having at least one recording head (26) for recording the processed information signal in a track on the record carrier, and for recording the count signals in a track on the record carrier and a transport apparatus (34,35) for transporting the record carrier with a certain transport velocity (vt) in a longitudinal direction of the record carrier. The counting device (23) is adapted to supply count signals such that, independent of the value of the transport velocity during recording, a count signal is recorded in a substantially fixed location, viewed in the longitudinal direction of the record carrier, on said record carrier. Further, in the case that the arrangement is capable of recording a first video signal which is based on 25 pictures per second and of recording a second video signal which is based on 30 pictures per second, the following relation exists between the supply rate Fs of the subsequent different count signals by the count signal generator (23), and D, being the difference between subsequent different count signals generated: Fs×D=constant, for the recording of the first video signal as well as the second video signal, and where the transport velocity has been kept constant.
摘要翻译： 用于在记录载体（1）上的轨道（T0，T1，...）中记录信息信号的装置包括用于接收信息信号的输入端（20），用于处理信息信号的信号处理电路（21） 使得其可以记录在轨道计数装置（23）中，用于计数并产生后续不同计数信号的阵列，并用于将计数信号提供给输出（24），记录装置（25,26,27）具有 至少一个记录头（26），用于将处理的信息信号记录在记录载体上的轨道中，并用于将记录在记录载体上的轨道中的计数信号和用于传送记录载体的传送装置（34,35） 在记录载体的纵向方向上的一定的运送速度（vt）。 计数装置（23）适于提供计数信号，使得不依赖于记录期间的传送速度的值，将计数信号记录在从记录载体的纵向观察的基本上固定的位置上，在所述记录上 载体 此外，在该装置能够记录基于每秒25张图像的第一视频信号和记录基于每秒30张图像的第二视频信号的情况下，存在以下关系： 由计数信号发生器（23）后续的不同的计数信号，D是产生的后续不同计数信号之间的差值：用于记录第一视频信号以及第二视频信号，以及传输速度已经 保持不变
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5.发明授权Direction identifier for recording of trick play signals on a record carrier 失效在记录载体上记录特技播放信号的方向标识符公开(公告)号：US06353701B1
公开(公告)日：2002-03-05
申请号：US09155723
申请日：1998-10-05
IPC分类号： H04N591
CPC分类号： G11B27/3027 , G11B5/0086 , G11B5/09 , G11B15/087 , G11B15/1875 , G11B15/4676 , G11B15/4677 , G11B20/1207 , G11B27/005 , G11B27/3063 , G11B2220/90 , H04N5/78263 , H04N5/783 , H04N9/8042 , H04N9/8227
摘要： A format for the recording of trick play signals in which trick play segments including sync blocks of information of a trick play signal are recorded in the tracks. At least first and second trick play signals are recorded on the record carrier. The first trick play signal is meant for reproduction in a reproduction apparatus at a reproduction speed n1 times the recording speed with which the trick play signals are recorded on the record carrier. The second trick play signal is meant for reproduction in the reproduction apparatus at a reproduction speed −n1 times the recording speed. Both trick play signals are recorded in the tracks such that, upon reproduction at the speed n1 times the recording speed, m1 sync blocks of information of the first trick play signal and, upon reproduction at the speed −n1 times the recording speed, m1 sync blocks of the second trick play signal are read from the record carrier during one revolution of the head drum in the reproduction apparatus. Further, a direction identifier is stored in the trick play sync blocks, indicating whether a trick play sync block is meant for a specific trick play speed in the forward or in the reverse direction.
摘要翻译： 用于记录特技播放信号的格式，其中包括特技播放信号的信息的同步块的特技播放段被记录在轨道中。 至少第一和第二特技播放信号被记录在记录载体上。 第一特技播放信号用于在再现装置中以以特技播放信号记录在记录载体上的记录速度n1的再现速度再现。 第二特技播放信号用于以再现速度-n1倍于记录速度在再现设备中进行再现。 两个特技播放信号被记录在轨道中，使得当以n1倍于记录速度的速度再现时，m1个第一特技播放信号的同步信息块，并且以再现速度-n1倍于记录速度m1同步 在再现装置中的磁头鼓的一圈旋转期间，从记录载体读取第二特技播放信号的块。 此外，方向标识符被存储在特技播放同步块中，指示特技播放同步块是针对正向还是相反方向的特定特技播放速度。
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公开(公告)号：US4689577A
公开(公告)日：1987-08-25
申请号：US735901
申请日：1985-05-20
摘要： In an arrangement comprising a phase control circuit the phase comparator, when receiving input pulses with which the clock pulses are in phase, will produce an output signal having a pulse frequency which is twice the pulse frequency of the input pulses. The ripple on the control-voltage for the oscillator to be controlled resulting therefrom is compensated for by adding to the output signal of the phase detector a signal which is opposite in phase to the output signal. The result is that only frequency- and phase errors produce a ripple (change) on the output signal.
摘要翻译： 在包括相位控制电路的布置中，相位比较器在接收时钟脉冲同相的输入脉冲时将产生具有脉冲频率是输入脉冲的脉冲频率的两倍的输出信号。 通过向相位检测器的输出信号添加与输出信号相位相反的信号来补偿由其产生的要控制的振荡器的控制电压上的纹波。 结果是只有频率和相位误差在输出信号上产生纹波（变化）。
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公开(公告)号：US4370619A
公开(公告)日：1983-01-25
申请号：US168841
申请日：1980-07-10
CPC分类号： H03D13/006 , H02P23/186
摘要： A phase comparison circuit for producing an output signal which is a measure of the phase difference between first (A) and second (B) pulse trains applied to respective first and second inputs thereof. The circuit is immune to the omission of a pulse from one of the trains and to pulse length inequality in the two trains. It comprises a logic circuit, two switchable current sources connected to a capacitor (17), a switchable constant voltage source, i.e. a controllable switch (18) connected to the capacitor, and a sampling circuit connected to the capacitor. The logic circuit generates four output signals that control the first current source, the second current source, the constant voltage source, and the sampling circuit respectively so that the charge on the capacitor is changed in a positive sense by the first current source when a pulse of the first train is present while a pulse of the second train is absent and in the other sense by the second current source when a pulse of the second train is present while a pulse of the first train is absent. The capacitor charge is restored to a reference value (zero) by the constant voltage source when pulses of both trains are absent simultaneously. The sampling circuit samples the capacitor voltage when pulses of both trains are present simultaneously.
摘要翻译： 一种用于产生输出信号的相位比较电路，该输出信号是施加到其相应的第一和第二输入的第一（A）和第二（B）脉冲串之间的相位差的量度。 该电路免受从列车中的一个脉冲的省略以及两列火车脉冲长度不平等的影响。 它包括逻辑电路，连接到电容器（17）的两个可切换电流源，连接到电容器的可切换恒定电压源，即可控开关（18）以及连接到电容器的采样电路。 逻辑电路分别产生四个输出信号，它们分别控制第一电流源，第二电流源，恒压源和采样电路，使得电容器上的电荷在第一电流源的正向上被改变，当脉冲 当第一列的脉冲不存在时，第二列的脉冲不存在，而在另一方面，当第二列的脉冲存在时，第二列的脉冲存在。 当两列火车的脉冲同时出现时，电容器电荷由恒定电压源恢复到参考值（零）。 当两列火车的脉冲同时存在时，采样电路对电容器电压进行采样。
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8.发明授权Device for the generation of a control voltage across a piezo-electric positioning element 失效用于在压电定位元件上产生控制电压的装置
公开(公告)号：US4258282A
公开(公告)日：1981-03-24
申请号：US41022
申请日：1979-05-21
CPC分类号： G11B5/56 , G11B21/106 , G11B5/592 , G11B7/0937 , H01L41/042
摘要： A device for the generation of a control voltage across a piezo-electric positioning element. In order to enable a high voltage to be generated across the piezo-electric element without using a comparatively high supply voltage, use is made of the capacitance of such an element as an integrating element. The device comprises a current source and switches for transferring current pulses to and from the piezo-electric element on command of control pulses.
摘要翻译： 一种用于在压电定位元件上产生控制电压的装置。 为了在不使用较高的电源电压的情况下在压电元件两端产生高电压，可以使用作为积分元件的元件的电容。 该装置包括电流源和开关，用于根据控制脉冲的指令将电流脉冲传送到压电元件和从压电元件传递电流脉冲。
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9.发明授权Trick play signal generation for a digital video recorder using retrieved intra-encoded pictures and generated inter-encoded pictures 失效使用检索到的帧内编码图像和生成的帧间编码图像的数字视频记录器的特技播放信号生成公开(公告)号：US06621979B1
公开(公告)日：2003-09-16
申请号：US09329394
申请日：1999-06-10
IPC分类号： H04N591
CPC分类号： H04N5/783 , H04N5/78263 , H04N9/8042 , H04N9/8227
摘要： A trick play information stream is generated from a normal play information stream, so that they can be recorded together as a composite information stream on the record carrier, such that upon reproduction in a trick play reproduction mode, an information signal of sufficient quality, e.g., as regards visibility, can be obtained. GOPs are generated, each GOP including an I-frame retrieved from the original normal play information stream, and one or more so-called ‘empty P frames’. Another aspect is the requirement of generating GOPs for the trick play information stream that have a constant bitcost per GOP. Again, another aspect lies in the retrieval of the I-frame for the trick play information stream from the normal play information. More specifically, an I-frame is generated by retrieving, from an I-frame included in the normal play information, the DC coefficient of the I-frame and a number of AC coefficients from that I frame, and generating the I-frame for the trick play information stream therefrom. More specifically, the number of AC coefficients for an I-frame of the trick play information signal depends on the difference between the DC coefficients of two subsequent I-frames in the normal play information from which the I-frame to be generated and the just previously generated I-frame for the trick play information signal have been derived.
摘要翻译： 从正常播放信息流生成特技播放信息流，使得它们可以作为复合信息流一起记录在记录载体上，使得在特技播放再现模式下再现时，具有足够质量的信息信号，例如 关于可视性，可以获得。 生成GOP，每个GOP包括从原始正常播放信息流检索的I帧，以及一个或多个所谓的“空P帧”。另一方面是产生具有 同样，另一方面在于从正常播放信息中检索特技播放信息流的I帧，更具体地说，通过从包含在该帧中的I帧中检索出I帧， 正常播放信息，I帧的DC系数和来自该I帧的AC系数的数量，并且从其产生用于特技播放信息流的I帧，更具体地说，I帧的AC系数的数量 特技播放信息信号取决于要生成的I帧的正常播放信息中的两个后续I帧的DC系数与用于特技pl的刚刚生成的I帧的两个DC系数之间的差异 已经导出了一个信息信号。
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10.发明授权公开(公告)号：US06339673B1
公开(公告)日：2002-01-15
申请号：US09155722
申请日：1998-10-05
IPC分类号： H04N591
CPC分类号： G11B20/1208 , G11B5/0086 , G11B5/09 , G11B15/125 , G11B15/1875 , G11B15/4676 , G11B15/4677 , G11B27/005 , G11B27/3027 , G11B27/3063 , G11B2220/90 , H04N5/78263 , H04N5/783 , H04N9/8042 , H04N9/8227
摘要： A recording apparatus records an MPEG information signal and a trick play signal in tracks on a record carrier (1). The trick play signal is meant for reproduction in a corresponding reproduction apparatus at a record carrier trick play speed which is n1 times the nominal reproduction speed. Time stamps are added to the packets included in the trick play signal, and sync block numbers are added to the sync blocks including a packet, and the sync blocks are recorded at specific positions in the tracks. A specific algorithm is provided to determine those positions, dependent of the time stamps, and the sync block numbers given, such that upon reproduction at the trick play speed, the reproduction apparatus requires a buffer memory of a limited capacity.
摘要翻译： 记录装置在记录载体（1）上的轨道中记录MPEG信息信号和特技播放信号。 特技播放信号用于在对应的再现设备中以以标称再现速度的n1倍的记录载体特技播放速度再现。 将时间戳添加到包含在特技播放信号中的分组，并将同步块编号添加到包括分组的同步块中，同步块被记录在轨道中的特定位置。 提供具体的算法来确定取决于时间标记的那些位置和给定的同步块号，使得在以特技播放速度再现时，再现设备需要有限容量的缓冲存储器。
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