公开(公告)号：US5475423A

公开(公告)日：1995-12-12

申请号：US159020

申请日：1993-11-29

申请人： Berthold Eiberger

发明人： Berthold Eiberger

IPC分类号： H04N3/36 ,  H04N3/38 ,  H04N5/253

CPC分类号： H04N3/38 ,  H04N5/253

摘要： In a film scanner for optically scanning a film for obtaining a picture signal, which film is moved at a constant speed, an image position correction which is as motion-independent as possible, is ensured in that the film scanner at least doubly scans at least parts of each film image and determines image position errors by comparing the two scanning signals of the same nominal image content, and corrects the picture signal in dependence upon the determined image position error.

摘要翻译： 在用于光学扫描用于获得图像信号的胶片的胶片扫描器中，哪个胶片以恒定的速度移动，确保尽可能不依赖于运动的图像位置校正，因为胶片扫描器至少至少扫描二次 通过比较相同标称图像内容的两个扫描信号来确定图像位置误差，并且根据所确定的图像位置误差来校正图像信号。

公开(公告)号：US5170296A

公开(公告)日：1992-12-08

申请号：US442847

申请日：1989-11-29

申请人： Berthold Eiberger

发明人： Berthold Eiberger

IPC分类号： G11B5/035 ,  G11B20/10 ,  G11B20/22

CPC分类号： G11B5/035 ,  G11B20/10009

摘要： Data signals recorded in oblique tracks on a magnetic tape, after they are picked up, preamplified and prefiltered, are rectified and converted to digital values representative of amplitude in respective segments distributed over track lengths. For each segment position in a track, the values are averaged and inverted by a ROM and stored in a RAM at track segment addresses. The values thus stored are converted into analog form and then used as multipliers in a multiplication stage following the preamplification and prefiltering. The output of the multiplier can readily be shaped into unambiguous data signals for further processing.

摘要翻译： 记录在磁带上的倾斜轨道中的数据信号在被拾取，预放大和预过滤之后被整流并转换成代表在磁道长度上分布的各个段中的振幅的数字值。 对于轨道中的每个段位置，这些值被平均并由ROM反转并存储在RAM中的轨道段地址处。 这样存储的值被转换成模拟形式，然后在预放大和预过滤之后的乘法阶段中用作乘法器。 乘法器的输出可以容易地被形成明确的数据信号以用于进一步处理。

公开(公告)号：US4932041A

公开(公告)日：1990-06-05

申请号：US215742

申请日：1988-07-06

申请人： Berthold Eiberger ,  Michael Philipps ,  Rolf Schiffmann ,  Peter Ries

发明人： Berthold Eiberger ,  Michael Philipps ,  Rolf Schiffmann ,  Peter Ries

IPC分类号： H03L7/113 ,  H04L7/033

CPC分类号： H03L7/113 ,  H04L7/033

摘要： To the phase locked loop for controlling the oscillator that regenerates a bit-rate clock signal from a data signal by means of a phase comparison circuit followed by a low pass filter, the output of which controls the oscillator frequency, a digital frequency comparison circuit is provided for assuring that the oscillator frequency will be brought into the capture range of the phase locked loop. The output of the digital frequency comparison circuit is converted from digital to analog form for being used in combination with the low pass filter output to control the oscillator. Frequency and phase control signals are applied to opposite electrodes of a variable capacitance diode in the frequency determining circuit of the oscillator. In order to improve the operation the frequency comparison circuit, delayed and undelayed oscillator output clock signals are sampled by transitions of the data signal for respectively incrementing or decrementing a counter, the state of which is then converted into an anlog signal for contributing to the control of the oscillator. The data signal also is provided in delayed and undelayed forms, and these are combined in an exclusive-OR gate, the output of which is used both in the phase comparison circuit and in the sampling portion the frequency comparison circuit. That portion of the frequency comparison circuit controls a pair of monoflops through D-flipflops so as to provide the necessary incrementing or decrementing pulses for the counter.

摘要翻译： 对于用于控制振荡器的锁相环，其通过相位比较电路后跟低通滤波器从数据信号再生比特率时钟信号，其输出控制振荡器频率，数字频率比较电路为 用于确保振荡器频率将进入锁相环的捕获范围。 数字频率比较电路的输出从数字模拟形式转换为与低通滤波器输出组合使用以控制振荡器。 频率和相位控制信号被施加到振荡器的频率确定电路中的可变电容二极管的相对电极。 为了提高频率比较电路的运行，延迟和未延迟的振荡器输出时钟信号通过数据信号的转换进行采样，以分别递增或递减计数器，然后将其状态转换成用于有助于控制的anlog信号 的振荡器。 数据信号也以延迟和未延迟的形式提供，并且它们被组合在异或门中，其异或门在相位比较电路和频率比较电路的采样部分中使用。 频率比较电路的该部分通过D触发器控制一对单声道，以便为计数器提供必要的递增或递减脉冲。

公开(公告)号：US4920461A

公开(公告)日：1990-04-24

申请号：US296521

申请日：1989-01-12

申请人： Berthold Eiberger

发明人： Berthold Eiberger

IPC分类号： G11B5/008 ,  G11B5/02

CPC分类号： G11B5/02 ,  G11B5/0086

摘要： When the relative speed of the head wheel to the tape transport is reduced for recording at a lower data rate, a resistance interposed between the stationary driver amplifier and the stator of a rotary transformer is reduced to produce a mismatch of the coupling between the driver amplifier and a recording amplifier on the head wheel. The latter is connected to the recording head. The mismatch lowers the upper cut-off frequency of transmission through the rotary transformer and shifts the frequency transmission band downward also lowering the lower cut-off frequency. A servo control which sets the relative speed of the head wheel circumference with reference to the moving tape provides a signal to a logic circuit which progressively switches in shunting resistors lowering the resistance interposed between the driver amplifier and the transformer stator, as the relative speed of rotary recording head to tape is reduced, for advantageous operation when the data rate is below the maximum data rate that can be used with the equipment. With a balanced circuit of the driver amplifier, an interposed resistance is connected on each side of the transformer stator and each of them is progressively shunted down by switching steps as the relative speed is reduced. At the highest relative speed, the output of the driver amplifier is matched to the input of the recording amplifier for good power transfer.

摘要翻译： 当磁头传送到磁带传输的相对速度减小以便以较低的数据速率进行记录时，介于固定驱动放大器和旋转变压器的定子之间的电阻被减小以产生驱动放大器之间的耦合失配 和头轮上的记录放大器。 后者连接到记录头。 不匹配降低了通过旋转变压器传输的上限截止频率，并且使频率传输频带向下移动也降低了下限频率。 相对于移动带设置头轮周长的相对速度的伺服控制器向逻辑电路提供信号，逻辑电路逐渐切换分流电阻器，降低插入在驱动放大器和变压器定子之间的电阻，作为相对速度 当数据速率低于可与设备一起使用的最大数据速率时，旋转记录头到磁带被减少，以便有利的操作。 利用驱动放大器的平衡电路，在变压器定子的每一侧连接有插入的电阻，并且随着相对速度的降低，通过切换步骤逐个分流。 在最高的相对速度下，驱动放大器的输出与记录放大器的输入相匹配，以实现良好的功率传输。