公开(公告)号：US4849994A

公开(公告)日：1989-07-18

申请号：US894304

申请日：1986-08-07

申请人： Jurgen Heitmann ,  Rolf Loos

发明人： Jurgen Heitmann ,  Rolf Loos

IPC分类号： G11B20/12 ,  G11B20/14 ,  G11B27/30 ,  H04L7/08

CPC分类号： H04L7/08 ,  G11B20/12 ,  G11B20/1426 ,  G11B27/3027 ,  H04L7/0008

摘要： For transmission of serial digitally coded signals over a path having a high-pass frequency characteristic synchronizing signals are transmitted in synchronizing word pairs at the beginning of each data block in which the synchronizing words are either identical or else both have the same number of bits of each of the two binary logic levels, for reduction of d.c. and low-frequency components while permitting the choice of a synchronizing signal word which occurs at most rarely in a television video signal, for example.

摘要翻译： 为了在具有高通频率特性的路径上发送串行数字编码信号，在每个数据块的开始处以同步字对中的同步字对发送同步信号，其中同步字是相同的，或者两者具有相同的位数 两个二进制逻辑电平中的每一个，用于减少直流 和低频分量，同时允许选择在电视视频信号中最少发生的同步信号字。

公开(公告)号：US4825440A

公开(公告)日：1989-04-25

申请号：US45692

申请日：1987-04-30

申请人： Jurgen Heitmann ,  Peter Wagner

发明人： Jurgen Heitmann ,  Peter Wagner

IPC分类号： H04N5/21 ,  H04N11/04 ,  H04N19/895 ,  G06F11/12

CPC分类号： H04N5/21 ,  H04N19/895

摘要： Two logic circuits (4A, 4B) are utilized in alternation for controlling the processing of successive pixels that are detected to be erroneous. Each logic circuit has its own counter 5A and 5B for associating the undisturbed pixels with ordinal numbers designating their spacing from the disturbed pixel under processing and likewise has a separate PROM (6A, 6B) and a separate multiplier for weighting the undisturbed pixel values, as well as an accumulator (10A, 10B) for summing the weighted values to produce a substitute value, so that undisturbed pixels lying between two disturbed pixels can all be used, where necessary, both for compensating for a preceding disturbed pixel and a following disturbed pixel. When a following disturbed pixel is detected while a preceding disturbed pixel is being processed by a logic circuit, that logic circuit provides a special reset to its counter and accumulator and selects another PROM program in accordance with the shortening of the "filter length" by the nearness of the two disturbed pixels. When no defective pixels appear on the counters, multipliers and accumulators do not need to operate.

摘要翻译： 两个逻辑电路（4A，4B）被交替地用于控制被检测为错误的连续像素的处理。 每个逻辑电路都有自己的计数器5A和5B，用于将未受干扰的像素与序号进行关联，这些数字指定它们与处理中的干扰像素的间隔，并且同样具有单独的PROM（6A，6B）和用于对未受干扰的像素值进行加权的单独乘法器，如 以及用于对加权值求和以产生替代值的累加器（10A，10B），使得可以在必要时使用位于两个干扰像素之间的未受干扰的像素来补偿前面的被干扰的像素和随后的受扰像素 。 当在由逻辑电路处理前一个被干扰的像素的同时检测到随后的干扰像素时，该逻辑电路向其计数器和累加器提供特殊的复位，并根据缩短“滤波器长度”，选择另一个PROM程序 两个干扰像素的接近度。 当计数器上没有出现缺陷像素时，乘法器和累加器不需要操作。

公开(公告)号：US4764816A

公开(公告)日：1988-08-16

申请号：US899072

申请日：1986-08-21

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： G11B5/09 ,  G11B5/008 ,  G11B5/035 ,  G11B20/18 ,  G11B27/36 ,  H04N5/7826 ,  H04N5/91 ,  H04N5/92 ,  H04N17/06 ,  H04N9/80

CPC分类号： H04N17/06 ,  G11B20/1879 ,  G11B27/36 ,  G11B5/0086 ,  G11B5/035

摘要： A full-frame memory for television signals is filled while the tape transport speed is reduced to a small fraction of its normal speed while a selected of the head-wheel of a recorder-reproducer first records a segment of a frame recorded in one oblique track, then is switched to reproduction that reads the track just recorded. In the next frame a second segment is similarly recorded, reproduced and stored for the second frame, and so on. After a complete set of segments are put in memory a complete composite picture can be reproduced therefrom and of course the content of the memory can be displayed in the intervals between the recording of segments. A pixel error detector is used both for displaying errors by setting all recognizably faulty pixels to picture black and also counting the number of recognizably defective pixels per segment. While this evaluation procedure is being run, the recording current, the pre-emphasis and the de-emphasis adjustments can be varied so that they can ultimately be set at the settings which produce the lowest error rate in the reproduced picture.

摘要翻译： 填充用于电视信号的全帧存储器，同时磁带传送速度降低到其正常速度的一小部分，而所选择的记录器 - 再现器的前轮首先记录记录在一个倾斜轨道中的帧的片段 ，然后切换到读取刚刚记录的轨道的再现。 在下一帧中，对于第二帧类似地记录，再现和存储第二段，等等。 在将完整的片段集合放入存储器之后，可以从其再现完整的合成图像，并且当然可以以片段的记录之间的间隔显示存储器的内容。 使用像素误差检测器来将所有可识别的故障像素设置为图像黑色并且还计算每个段的可识别缺陷像素的数量来显示错误。 在执行该评估程序的同时，可以改变记录电流，预加重和去加重调整，使得它们最终可以被设置为在再现图像中产生最低错误率的设置。

公开(公告)号：US4556983A

公开(公告)日：1985-12-03

申请号：US547918

申请日：1983-11-02

申请人： Jurgen Heitmann ,  Horst Rickenbrock

发明人： Jurgen Heitmann ,  Horst Rickenbrock

IPC分类号： G11B20/10 ,  H04L25/06 ,  H04L25/49 ,  H04B1/62

CPC分类号： G11B20/10194 ,  G11B20/10009 ,  H04L25/06 ,  H04L25/4906

摘要： In a serial binary digit stream, when a single bit follows at least two bits of the opposite polarity and is succeeded also by a bit of that opposite polarity, a comparator produces a correction signal which is combined with the first-mentioned bit so as to broaden it in time span. As a result, the amplitude of reception or reproduction of the broadened bit is enhanced so as to compensate for deficiency of amplitude which would result from the imperfection of the transmission channel or recording and reproduction process. The broadening of the critical bit pulse can be performed by a correction pulse that enhances its amplitude, followed by Nyquist filtering and then by amplitude limiting to the normal binary digit amplitude level, or else the broadening can be accomplished by providing a correction pulse shifted in phase by an adjustably shifted clock pulse or train. In the latter case, the phase shifted correction pulse is combined with the critical pulse so as to broaden it, either at the expense of the preceding pulse or at the expense of the pulse that follows.

摘要翻译： 在串行二进制数字流中，当单个比特遵循相反极性的至少两个比特，并且还被相反极性的比特成功时，比较器产生与首先提到的比特组合的校正信号，以便 扩大时间跨度。 结果，扩大位的接收或再现的幅度被增强，以便补偿由于传输信道的不完整或记录和再现处理而导致的幅度不足。 关键位脉冲的加宽可以通过增强其幅度的校正脉冲来执行，随后是奈奎斯特滤波，然后通过幅度限制到正常的二进制数字振幅电平，否则可以通过提供在 相位可调的时钟脉冲或列车。 在后一种情况下，将相移校正脉冲与临界脉冲相结合，以便以先前的脉冲为代价，或以随后的脉冲为代价来扩大它。

公开(公告)号：US4491869A

公开(公告)日：1985-01-01

申请号：US361528

申请日：1982-03-23

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： H03M7/00 ,  G11B20/10 ,  G11B20/14 ,  H04B14/04 ,  H04N5/926 ,  H04N5/40 ,  H04N9/493

CPC分类号： H04B14/04 ,  G11B20/10527 ,  G11B20/1426 ,  H04N5/926

摘要： The d.c. component of video signals is to a great extent eliminated for a wide range of content, sufficiently for recording, for example, without the introduction of redundancy in the digital coding, when the digital words corresponding to samples of the analog signal are converted into a binary code in which the number of bits of one logic level is approximately linearly dependent upon the magnitude of the analog signal. In such a code, there are successive ranges of the analog signal in which the number of bits of one logic level remains the same, and within said ranges the change in digital words from one analog level to the next involves the change of two bits of the word. The digital words are serially provided for recording or transmission.

摘要翻译： 直径 视频信号的分量在很大程度上消除了广泛的内容，足以用于记录，例如，当数字编码中的对应于模拟信号的样本的数字被转换为二进制 其中一个逻辑电平的位数近似线性地取决于模拟信号的幅度的代码。 在这种代码中，存在模拟信号的连续范围，其中一个逻辑电平的位数保持相同，并且在所述范围内，从一个模拟电平到下一个模拟电平的数字字的变化涉及两个位的变化 这个单词。 数字字串行提供用于记录或传输。

公开(公告)号：US4458272A

公开(公告)日：1984-07-03

申请号：US323393

申请日：1981-11-20

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： H04N5/92 ,  G11B5/008 ,  G11B20/10 ,  H04N5/926 ,  G11B5/00 ,  G11B5/09

CPC分类号： H04N5/926

摘要： To store digital data on a magnetic tape at a bit rate which does not exceed the storage capabilities of the tape of about 80 Mbit/s, although received digital video signals have a bit rate of about 200 Mbit/s, the video signals are split into two channels and applied to a head wheel having four transducer heads, and the bits are applied to the transducer heads in time-expanded form, with the wrap angle of the tape exceeding 180.degree., time expansion being carried out at a rate related to the excess wrap angle, so that the track of recording will have a smaller recording angle (.beta.2) than heretofore (.beta.1), the time-expanded signals being recompressed upon reproduction. Time compression and expansion is preferably carried out by buffer memories which have data entered and read-out in the FIFO method, at respectively different clock rates, switched under control of a control unit (26) which receives head wheel position input signal information.

摘要翻译： 为了以不超过约80Mbit / s的磁带的存储能力的比特率将数字数据存储在磁带上，尽管接收的数字视频信号具有大约200Mbit / s的比特率，但是视频信号被分离 分成两个通道，并应用于具有四个换能器头的头轮，并且该位以时间扩展形式施加到换能器头，带的包角超过180度，时间膨胀以与 多余的包角，使得记录轨迹具有比迄今为止（beta 1）更小的记录角度（β2），时间扩展信号在再现时被再压缩。 时间压缩和扩展优选地通过在FIFO方法中以分别不同的时钟速率输入和读出数据的缓冲存储器进行，该控制单元接收头轮位置输入信号信息的控制单元（26）的控制下切换。

公开(公告)号：US4376291A

公开(公告)日：1983-03-08

申请号：US279747

申请日：1981-07-02

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： H04N9/896 ,  H04N9/493

CPC分类号： H04N9/896

摘要： The specification describes a method for compensating time faults in a color television signal which is reproduced from an information carrier and converted into digital form. The compensation is achieved in various stages involving a plurality of intermediate memories and clock signals, each stage performing a phase comparison for compensating a particular error in the reproduced signal.

摘要翻译： 本说明书描述了一种用于补偿从信息载体再现并转换为数字形式的彩色电视信号中的时间故障的方法。 补偿在涉及多个中间存储器和时钟信号的各个阶段中实现，每个级执行用于补偿再现信号中的特定误差的相位比较。

公开(公告)号：US4210933A

公开(公告)日：1980-07-01

申请号：US929498

申请日：1978-07-31

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： H04N7/24 ,  H04N5/18 ,  H04B1/12

CPC分类号： H04N7/24

摘要： A process and associated apparatus for digitally clamping pulse code modulated video signals is disclosed, including four separate preferred embodiments. The disclosed process first requires that during each horizontal scanning interval a difference between the binary value of the pulse code modulated video signal and a predetermined nominal binary value be determined. This difference is then arithmetically averaged with at least one similarly determined difference obtained during a prior horizontal scanning interval to obtain a binary correction value. The binary correction value is then added to the binary value of the pulse code modulated video signal which is to be clamped outside the horizontal scanning interval in the active range of a horizontal period.

摘要翻译： 公开了用于数字钳位脉码调制视频信号的过程和相关装置，包括四个单独的优选实施例。 所公开的处理首先要求在每个水平扫描间隔期间确定脉冲编码调制视频信号的二进制值与预定的标称二进制值之间的差值。 然后将该差异与在先前水平扫描间隔期间获得的至少一个类似确定的差异进行算术平均，以获得二进制校正值。 然后将二进制校正值加到在水平周期的有效范围内待钳位在水平扫描间隔之外的脉码调制视频信号的二进制值。

公开(公告)号：US5276708A

公开(公告)日：1994-01-04

申请号：US822096

申请日：1992-01-17

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： H03M7/00 ,  G11B20/14 ,  H03M5/14 ,  H03M7/14 ,  H03M13/31 ,  H04L25/49 ,  H04L25/34

CPC分类号： G11B20/1426 ,  H03M13/31 ,  H03M5/145 ,  H04L25/4908

摘要： For reducing the d.c. component of a digital signal in which a good many data words are put together in data blocks each having the same number of words, a supplementary word is derived and is transmitted or stored along with the data words. The bit mix of the supplementary word contains information for shifting the word bit-mix range, defined in accordance with the d.c. component of various words of the data words in the data block. The bit-mix value of the supplementary word is derived by evaluation of the weighting of ASE-coded data words in the data block, this being done in a manner dependent on the standard deviation and an expected value or center of gravity of the data block. A difference value determined with respect to the center of gravity and the value of a middle level value of a data word represents the value of the supplementary word with which, by the use of the modulo-2 addition the digital signal is shifted in bit-mix value range. The supplementary word is transmitted or recorded with each data block and is used in an operation which is the inverse of what is done before recording or transmission so that the original digital signal will be available again.

摘要翻译： 减少直径 数字信号的分量，其中许多数据字被放在一起，每个数据块具有相同数量的字，辅助字被导出并与数据字一起被发送或存储。 补充字的位混合包含用于移位字符比特混合范围的信息，根据d.c.定义。 数据块中数据字的各种单词的分量。 通过评估数据块中ASE编码的数据字的加权，得出补充字的位混合值，这取决于标准偏差和数据块的预期值或重心 。 相对于重心确定的差值和数据字的中间电平值的值表示补充字的值，通过使用模2加法，数字信号以位 - 混合值范围。 补充字被发送或记录在每个数据块中，并且被用于与记录或传输之前完成的操作相反的操作，使得原始数字信号将再次可用。

公开(公告)号：US5032933A

公开(公告)日：1991-07-16

申请号：US390614

申请日：1989-08-07

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： G11B5/008 ,  G11B5/09 ,  G11B5/53 ,  G11B15/02 ,  G11B15/14 ,  G11B27/36 ,  H04N5/926 ,  H04N17/06

CPC分类号： H04N17/06 ,  G11B15/02 ,  G11B15/14 ,  G11B27/36 ,  G11B5/0086 ,  G11B5/09 ,  G11B5/534 ,  H04N5/926 ,  G11B2220/90

摘要： A rotary scanning device of a magnetic tape recording and playback equipment, which carries a set of recording heads and a set of playback heads on its periphery is provided with one rotary transformer in addition to the number equal to the number of recording heads and to the number of playback heads of said sets. The additional rotary transformer is used for cyclically connecting its rotor to the respective playback heads during a recording operation by means of a controlled transfer switch, so that a fraction of the signals recorded by each of the recording heads is made available for an after-check which can be performed without visual display because of the digital nature of the recorded signals, which are evaluated by error recognition and word count circuits.

摘要翻译： 磁带记录和重放设备的旋转扫描装置在其周边上带有一组记录头和一组重放头，除了数量等于记录头的数量之外还设有一个旋转变压器， 所述集合的回放头数。 额外的旋转变压器用于在记录操作期间通过受控的转移开关将其转子循环地连接到各个回放头，使得由每个记录头记录的信号的一部分可用于后验 由于通过误差识别和字数电路评估的记录信号的数字性质，可以不进行视觉显示。