公开(公告)号：US5124806A

公开(公告)日：1992-06-23

申请号：US538552

申请日：1990-06-14

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： H04N5/95 ,  H04N9/88 ,  H04N9/896

CPC分类号： H04N9/896 ,  H04N5/95 ,  H04N9/88

摘要： In playback scanning of oblique tracks the jumps of velocity errors in the transition from one head to another are found to be substantially constant, but the magnitude of the velocity error as a whole is subject to statistical fluctuation and the like. Within a track a velocity error determined for one line is used for correction in the following line, while for the first line the magnitude of a jump from a previous magnetic head changeover in the same sense is utilized. With the help of a value from the last line or next-to-last line of the earlier track, a correction value is provided for the first line of the after next track. A ramp signal is inserted in each horizontal blanking interval ahead of the color synchronization signals, raising the latter to the top of the ramp level. The inserted signals are digitized along with the video signal. Samples of the digital ramp signal which pass through a magnitude window (70-73), which is set for passage of not more than two samples in a narrow range symmetrical with respect to the ramp midpoint, address a PROM which converts those magnitudes into timing error values of the pulse generator which provides sampling rate pulses for the converter that digitizes the video signal. The timing error values are used to correct the phase of that pulse generator.

摘要翻译： 在倾斜轨迹的回放扫描中，发现从一个头到另一个头的转变中的速度误差的跳跃基本上是恒定的，但是整体上的速度误差的大小受到统计波动等的影响。 在一个轨道内，为一条线确定的速度误差用于下一行的校正，而对于第一行，利用了相同意义上的先前磁头转换的跳跃幅度。 借助于前一曲目的最后一行或最后一行的值，为下一曲目的第一行提供一个修正值。 在颜色同步信号之前的每个水平消隐间隔中插入斜坡信号，将斜波信号提升到斜坡电平的顶部。 插入的信号与视频信号一起被数字化。 经过幅度窗口（70-73）的数字斜坡信号的样本，其被设置用于在相对于斜坡中点对称的窄范围内不超过两个样本的通过，将PROM转换为定时 脉冲发生器的误差值，其为转换器提供数字化视频信号的采样速率脉冲。 定时误差值用于校正该脉冲发生器的相位。

公开(公告)号：US5047872A

公开(公告)日：1991-09-10

申请号：US311939

申请日：1989-02-16

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： G11B5/008 ,  G11B15/087 ,  G11B15/14 ,  G11B15/18 ,  G11B27/00 ,  G11B27/36 ,  H04N5/783

CPC分类号： H04N5/783 ,  G11B15/087 ,  G11B15/14 ,  G11B15/1875 ,  G11B27/005 ,  G11B27/36 ,  G11B5/0086 ,  G11B2220/90

摘要： The rotary headwheel device for scanning oblique tracks on an advancing magnetic tape is provided with normal playback heads which follow the recording heads and trace the path of the same oblique tracks and also with auxiliary playback heads which trace the path of the respective tracks which the normal playback heads trace but do so 6 and 1/2 revolutions in advance. In order to improve display of the content of recorded digital television signals in a slowed down or accelerated motion mode, the auxiliary playback heads are shifted axially to offset them by a half track width from their position useful for audio processing, whenever the magnetic tape playback speed is off-normal. At such times the outputs of the several normal playback heads are evaluated as to error rate and if any of these outputs exceeds a reference error rate, a switchover unit on the rotary scanning device switches the rotary transformers, which carry the playback outputs to processing channels, from the normal playback heads to the auxiliary playback heads. The error rates are then measured and evaluated for the auxiliary playback heads, and when one of them shows an error rate exceeding the reference error rate, the rotary transformers are switched back to the normal playback heads and so on. The mechanical shift of the relative offset between auxiliary playback heads and normal playback heads is made and maintained electromagnetically for the duraton of off-normal tape speed operation in playback.

摘要翻译： 用于在前进磁带上扫描倾斜轨道的旋转头轮装置设置有遵循记录头并跟踪相同倾斜轨道的路径的正常重放头，以及跟踪各个轨道的路径的辅助重放头，其中正常 播放头跟踪，但提前6和1/2转。 为了改善在减速或加速运动模式下所记录的数字电视信号的内容的显示，辅助重放头轴向移动，以便从它们对音频处理有用的位置偏移半个磁道宽度，每当磁带播放 速度不正常。 在这样的时刻，几个正常重放头的输出被评估为错误率，并且如果这些输出中的任何一个超过参考误差率，则旋转扫描装置上的切换单元将携带回放输出的旋转变压器切换到处理通道 ，从正常播放头到辅助播放头。 然后对辅助播放头进行误差率的测量和评估，并且当其中一个显示错误率超过参考误码率时，旋转变压器被切换回正常播放头等等。 辅助播放头与正常播放头之间的相对偏移的机械偏移被制作并保持电磁状态，以便在回放中脱离正常的磁带速度操作。

公开(公告)号：US4939605A

公开(公告)日：1990-07-03

申请号：US286317

申请日：1988-12-19

申请人： Jurgen Heitmann ,  Rolf Loos ,  Hannfried Preissler

发明人： Jurgen Heitmann ,  Rolf Loos ,  Hannfried Preissler

IPC分类号： G11B5/09 ,  G11B5/008 ,  G11B5/53 ,  G11B15/14 ,  G11B27/032 ,  G11B27/036 ,  G11B27/32 ,  H04N5/7826

CPC分类号： H04N5/78266 ,  G11B15/14 ,  G11B27/032 ,  G11B27/036 ,  G11B27/322 ,  G11B5/0086 ,  G11B5/531 ,  G11B2220/90

摘要： The head wheel of a video recorder-reproducer is equipped with a set of four advanced read heads, in addition to the usual sets of four read and write heads, so that each advanced read head can read the contents of an oblique track on a magnetic tape on which one of the write heads will be able to record thereafter and which will be read still later by one of the normal read heads. The advanced read heads are so located that while one of them is reading a track, one of the normal read heads is out of contact with the tape. The advanced read heads are used for reading out audio sections of video tape tracks for processing and rerecording in accordance with a previously known processing procedure used in editing newly recorded video tapes for better audio recording. The normal read heads are available for an after-check of the rerecorded audio. A switching system timed by the rotation of the head wheel disconnects each of the normal read heads in a sequence during the periods in which they are respectively out of contact with the tape and at the same time the switches in one of the advanced read heads for scanning the mid-portion of the recorded tracks where the audio sections of the recording are located.

摘要翻译： 视频记录器 - 再现器的头轮除了通常设置的四个读写头之外还配备有一组四个高级读取头，使得每个高级读取头可以读取磁性的倾斜轨道的内容 其中一个写入头将能够在其上记录的磁带，并且稍后将由正常的读取头之一读取。 先进的读取头是如此的位置，当其中一个正在读取轨道时，其中一个正常的读取头与磁带不接触。 高级读取头用于根据用于编辑新记录的录像带以用于更好的音频记录的先前已知的处理程序来读出视频磁带的音频部分进行处理和重新录制。 正常的读取头可用于重新录制的音频的检查。 通过头轮的旋转定时的切换系统在它们分别与带不接触的时段期间以一系列顺序断开每个正常读头，并且同时在其中一个高级读取头中的开关 扫描记录的音频部分所在的记录的轨道的中间部分。

公开(公告)号：US4769720A

公开(公告)日：1988-09-06

申请号：US909636

申请日：1986-09-18

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： H04N5/911 ,  H04N5/95 ,  H04N9/88 ,  H04N9/89 ,  H04N9/896 ,  H04N9/87

CPC分类号： H04N5/911 ,  H04N5/95 ,  H04N9/88 ,  H04N9/89 ,  H04N9/896

摘要： A color television signal processor for signals reproduced from magnetic tape converts the signals to digital form at a sampling rate substantially equal to three times the color carrier frequency, incorporates a timing system that locks the sampling rate into step with the picked up synchronizing signals in which a digital pulse generator of high stability is utilized having other possible applications, an additional demodulator separately switched is used to recover synchronizing signals for the first line of each segment, a ramp signal is provided during the blanking interval to assist in accurate timing of the sampling pulses, velocity errors are corrected for each line by a measurement of the period of a previous line and discontinuities (jumps in alternating directions) related to the switching between heads are also measured and compensated for. A more economical scheme for dealing with signal dropouts makes use of a digital low-pass filter for separating luminance and chrominance signals for dropout compensation that can be left in circuit without deterioration of picture quality during periods in which no dropouts are detected.

摘要翻译： 用于从磁带再现的信号的彩色电视信号处理器以基本上等于彩色载波频率的三倍的采样率将信号转换为数字形式，包括定时系统，其将采样速率与采集的同步信号进行步进，其中采样速率 利用具有高稳定性的数字脉冲发生器具有其他可能的应用，使用单独切换的附加解调器来恢复每个段的第一行的同步信号，在消隐间隔期间提供斜坡信号以辅助采样的准确定时 脉冲，速度误差通过测量前一行的周期来校正每行，并且还测量和补偿与头之间的切换相关的不连续性（在交替方向上的跳跃）。 用于处理信号丢失的更经济的方案使用数字低通滤波器来分离可以留在电路中的亮度和色度信号，而不会在不检测到丢失的时段期间图像质量下降。

公开(公告)号：US4672467A

公开(公告)日：1987-06-09

申请号：US665025

申请日：1984-10-26

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： G11B5/008 ,  G11B20/12 ,  H04N5/7826 ,  H04N9/806 ,  H04N9/80

CPC分类号： H04N9/8063 ,  G11B20/1208 ,  G11B5/0086 ,  H04N5/78266

摘要： Successive groups of television lines of a first field of a television frame have the luminance information recorded on a first oblique track and the chrominance information recorded on the next, whereas in the second field of the frame, the chrominance information is recorded on the first and the luminance information on the next track of each successive pair of tracks. Audio information is recorded in four segments of each of two channels, with two segments (one from each channel) preceding the video information and two more following it on each track with spacing by recording-free gaps (G). This arrangement maximizes the effect of covering or correcting transient or longer duration failures resulting from defects in the tape or irregular incidence or blockage of a magnetic head.

摘要翻译： 电视帧的第一场的连续的电视线组具有记录在第一倾斜轨道上的亮度信息和记录在下一个的色度信息，而在帧的第二场中，色度信息被记录在第一斜面上，并且 在每个连续的一对轨道的下一个轨道上的亮度信息。 音频信息被记录在两个通道中的每个通道的四个段中，其中两个段（每个通道中一个）在视频信息之前，另外两个跟随它在每个轨道上，间隔无记录间隙（G）。 这种布置最大化覆盖或校正由于磁带中的缺陷或磁头的不规则入射或阻塞引起的瞬时或更长持续时间故障的影响。

公开(公告)号：US4555737A

公开(公告)日：1985-11-26

申请号：US530114

申请日：1983-09-07

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： G11B20/10 ,  G11B15/665 ,  G11B27/032 ,  G11B27/038 ,  G11B27/02

CPC分类号： G11B27/038

摘要： Sudden changes in loudness of the sound signal between successive television scenes are avoided by substituting faded transitions between the sound signals of successive scenes instead of simple abutment of sound signal sequences one behind the other. This is produced, in a system in which the sound signals are digitally encoded, by distributing digital sound signal samples individually or by pairs to two recording channels in alternation and providing the transitions from the sound signals of one scene to the sound signal of the next scene earlier in one channel than in the other, by about 10 milliseconds. During that time span, one signal is faded out and the other is faded in by digital filtering or multiplication. It is convenient to provide such a reciprocal fading operation for the sound signals between each picture field or at least between each picture frame. During the reciprocal fading intervals, the sound signal samples of each sequence may be filled in with interpolated sample values inserted at the same time that a sample value of the other sequence is provided in the other channel. The provision of continuous forming of interpolated values can be used for substitution of interpolated values for sample values of a signal that has dropped out or been subjected to errors by disturbances.

摘要翻译： 通过在连续场景的声音信号之间代替褪色的转换，而不是一个接一个的声音信号序列的简单邻接来避免连续的电视场景之间的声音信号的响度的突然变化。 在声音信号被数字编码的系统中，通过将数字声音信号采样单独或成对地交替分配给两个记录通道，并且提供从一个场景的声音信号到下一个场景的声音信号的转换， 场景早在一个频道比另一个，大约10毫秒。 在该时间段内，一个信号被淡出，另一个信号通过数字滤波或乘法衰减。 为每个图像场之间或至少在每个图像帧之间的声音信号提供这种相互衰减操作是方便的。 在互逆衰落间隔期间，每个序列的声音信号样本可以用在另一个信道中提供另一个序列的样本值的同时插入的内插样本值来填充。 内插值的连续形成的提供可以用于替代已经掉线或经过干扰的误差的信号的采样值的内插值。

公开(公告)号：US3996607A

公开(公告)日：1976-12-07

申请号：US596842

申请日：1975-07-17

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： H04N11/04 ,  H04N9/32

CPC分类号： H04N11/046

摘要： A color television signal is divided into a luminance signal component Y and two color difference signal components R--Y and B--Y. In differential pulse code modulation for transmission and demodulation after reception, the color difference signals are coded and decoded in a time multiplex mode respectively by a single coder and a single decoder.

摘要翻译： 彩色电视信号被分为亮度信号分量Y和两个色差信号分量R-Y和B-Y。 在用于接收后的发送和解调的差分脉冲编码调制中，色差信号分别由单个编码器和单个解码器以时间复用模式进行编码和解码。

公开(公告)号：US5021895A

公开(公告)日：1991-06-04

申请号：US444723

申请日：1989-12-01

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： G11B5/02 ,  G11B5/024 ,  G11B5/265 ,  G11B5/48 ,  G11B5/53

CPC分类号： G11B5/024 ,  G11B5/02 ,  G11B5/2654 ,  G11B5/4893 ,  G11B5/531

摘要： A method of recording signals on a magnetic medium, in which a first magnetic head (1) blanks a wide track by recording signals at a first azimuth angle and a second magnetic head (2) records a narrower signal track (15) by recording signals at a second, differing azimuth angle. This permits feeding the same current or signal through the head windings (8,9) of both heads, thereby economizing on driving circuitry (10). Due to the differing azimuth angles, the reading head does not pick up any significant amount of noise from the border regions defined between the edges of the signal track and the wider blanking track. The width of the signal track and the widths of the border regions sum to equal the width of the blanking track.

摘要翻译： 一种在磁介质上记录信号的方法，其中第一磁头（1）通过以第一方位角记录信号来擦除宽轨道，而第二磁头（2）通过记录信号记录较窄的信号轨道（15） 在第二个方位角不同。 这允许通过两个磁头的磁头绕组（8,9）馈送相同的电流或信号，从而节省驱动电路（10）。 由于不同的方位角，读取头不会从信号轨道的边缘和更宽的消隐轨道之间限定的边界区域拾取任何大量的噪声。 信号轨道的宽度和边界区域的宽度相等于消隐轨道的宽度。

公开(公告)号：US4974082A

公开(公告)日：1990-11-27

申请号：US335770

申请日：1989-04-10

申请人： Jurgen Heitmann

发明人： Jurgen Heitmann

IPC分类号： H04N5/911 ,  H04N5/95 ,  H04N9/885 ,  H04N9/888 ,  H04N9/89 ,  H04N9/896

CPC分类号： H04N9/888 ,  H04N5/911 ,  H04N5/95 ,  H04N9/885 ,  H04N9/89 ,  H04N9/896

摘要： In a video signal processor incorporating a reference clock pulse generator of highly precise frequency, two pulse generators, one preceding the drop-out corrector circuit which includes a picture memory and another following the drop-out corrector, are controlled in phase and frequency periodically in response to a horizontal synchronizing pulse. An addition circuit (101) the output of which is intermediately stored in a 20 place register (105) has a data input (104) to which bits of higher binary significance, for phase control, are supplied in response to the synchronizing pulse and thereafter bits of lower binary digit significance are supplied by a velocity error detection circuit for frequency control during the remainder of a television line interval. The output of the 20 place register is fed back to another input of the addition circuit, to produce a sawtooth wave resulting from the overflow of the addition circuit, which is a submultiple of the reference clock pulse generator frequency. A PROM, responsive to the 10 most significant output bits of the addition circuit, and subsequent processing circuits (114,118, 115) convert the sawtooth wave to an analog sinusoidal wave which is then frequency multiplied to a frequency approximating the frequency of the reference clock pulse generator.

摘要翻译： 在包含高精度频率的参考时钟脉冲发生器的视频信号处理器中，两个脉冲发生器，一个包括图像存储器的出口校正器电路之一，另外一个在出口校正器之后的周期性地以相位和频率被控制 响应水平同步脉冲。 其输出中间存储在20位寄存器（105）中的加法电路（101）具有数据输入（104），响应于同步脉冲而提供用于相位控制的较高二进制有效位，此后 在电视线间隔的剩余时间期间，用于频率控制的速度误差检测电路提供较低二进制数有意义的位。 20位寄存器的输出被反馈到加法电路的另一输入端，产生由作为参考时钟脉冲发生器频率的多余的加法电路的溢出产生的锯齿波。 响应于加法电路的10个最高有效输出位的PROM以及随后的处理电路（114,118,115）将锯齿波转换成模拟正弦波，然后将其频率乘以接近参考时钟脉冲频率的频率 发电机。

公开(公告)号：US4931885A

公开(公告)日：1990-06-05

申请号：US198135

申请日：1988-05-24

申请人： Roland Mester ,  Rolf Loos ,  Jurgen Heitmann ,  Jurgen Muller

发明人： Roland Mester ,  Rolf Loos ,  Jurgen Heitmann ,  Jurgen Muller

IPC分类号： G11B27/10 ,  G11B27/30 ,  G11B27/32

CPC分类号： G11B27/107 ,  G11B27/3027 ,  G11B27/322 ,  G11B2220/90

摘要： Data blocks recorded on oblique tracks on magnetic tape are preceded by synhronizing signals and block identification signals. The serial data identification signals are converted to 8-bit parallel form and then are split between an undelayed channel and a channel delayed by one data block. Under control of a sync detector the parallel data are made to correspond with data words and are then decoded for comparison of the block numbers. Since the block numbering is consecutive, the delayed decoded block number is incremented by one for comparison. When a positive comparison is obtained the block number of the delayed decoded signals is made available to identify the data block. A counter in a so called fly wheel circuit assures provision of a new block start signal if a synchronizing signal is missed and prevents the timing of the circuit from being put off by a false detection of a synchronizing signal. A block identification output appears only if its block number is in sequence.

摘要翻译： 记录在磁带上的倾斜轨道上的数据块之前是同步信号和块识别信号。 将串行数据识别信号转换为8位并行形式，然后在未延迟的通道和延迟一个数据块的通道之间进行分割。 在同步检测器的控制下，使并行数据与数据字相对应，然后被解码以便比较块号。 由于块编号是连续的，所以延迟解码块号被增加1以进行比较。 当获得正比较时，延迟解码信号的块号可用于识别数据块。 在所谓的飞轮电路中的计数器确保提供新的块起始信号，如果错过同步信号，并且防止电路的定时被同步信号的错误检测所推迟。 块标识输出仅在其块号顺序显示时才会出现。