公开(公告)号：US4293879A

公开(公告)日：1981-10-06

申请号：US75978

申请日：1979-09-17

申请人： Jurgen Heitmann ,  Hans-Peter Maly ,  Rudolf Wilhelm

发明人： Jurgen Heitmann ,  Hans-Peter Maly ,  Rudolf Wilhelm

IPC分类号： H04N5/783 ,  G11B5/027 ,  H04N5/92 ,  H04N5/937 ,  H04N5/78

CPC分类号： H04N5/937 ,  H04N5/9201

摘要： This invention concerns a method of reproducing, at a selectable magnetic tape speed different from that used during the recording, a video signal stored in a plurality of separate tracks inclined to the center line of the magnetic tape by means of a head wheel carrying peripherally arranged magnetic heads, wherein the addresses of reproduced lines of picture information are derived solely from the composite signal reproduced from the magnetic tape, wherein useful lines are read into respective locations of a picture store in accordance with these line addresses, and wherein the stored lines are read out from the store in a predetermined sequence.In the embodiment described the line addresses are derived by a counter to the counting input of which are delivered pulses which correspond to that of the horizontal synchronizing pulses taken from the magnetic tape, to the resetting input of which are delivered pulses which correspond to the vertical synchronizing pulses taken from the magnetic tape, and to a third input of which are delivered pulses the frequency of which corresponds to the frequency of cross modulation disturbances and each of which causes a change in the registered count by an amount which is determined by the registered count itself and whether the tape reproduction speed is greater or less than the recording speed.

摘要翻译： 本发明涉及一种在与记录期间不同的可选择的磁带速度下再现存储在多个独立磁道中的视频信号，该视频信号通过一个外围布置的磁头轮与磁带的中心线倾斜， 磁头，其中图像信息的再现行的地址仅从从磁带再现的复合信号中导出，其中根据这些行地址将有用行读入图片存储器的相应位置，并且其中存储的行是 以预定的顺序从商店读出。 在所描述的实施例中，线路地址是通过计数输入的计数器导出的，这些计数输入是对应于从磁带获取的水平同步脉冲的递送脉冲，其复位输入是对应于垂直 从磁带获取的同步脉冲和其第三输入的输出脉冲的频率对应于交叉调制干扰的频率，并且每个脉冲引起注册计数的改变量，其由登记的 计数自身以及磁带重放速度是否大于或小于记录速度。

公开(公告)号：US4276563A

公开(公告)日：1981-06-30

申请号：US857024

申请日：1977-12-02

申请人： Jurgen Heitmann ,  Gerhard Illetschko ,  Hans-Peter Maly

发明人： Jurgen Heitmann ,  Gerhard Illetschko ,  Hans-Peter Maly

IPC分类号： G01R13/00 ,  H04N17/00 ,  H04N7/02

CPC分类号： G01R13/00 ,  H04N17/00

摘要： A method and apparatus for representing the amplitude curve of a selected portion of a video signal upon the picture screen of a video display device, at least the selected portion being in digital form and not requiring conversion to analog form prior to such representation.This is achieved by using the line structure of the line raster produced on the picture screen of the video display device as a digital-analog converter. The range of possible digital values for the individual picture elements of the selected line of the video signal are allocated as reference values to respective lines of the line raster, and during each line period of the line raster the digital values of the elements are compared in succession with the appertaining reference value. When during any line period of the line raster the compared values agree the picture screen is momentarily brightened, so that each picture element of the selected line is represented on the screen with a vertical displacement determined by its digital value, so that an amplitude curve similar to an oscillogram is produced having a horizontal time axis.In a further embodiment of the invention, arranged to display the amplitude curve of selected picture elements each taken from a respective line of the video signal, the reference values are allocated to respective columns of the line raster of the display device. The result is the production of an oscillogram on the picture screen having a vertical time axis.

摘要翻译： 一种用于在视频显示设备的画面上表示视频信号的选定部分的幅度曲线的方法和装置，至少所选择的部分是数字形式，并且在这种表示之前不需要转换为模拟形式。 这是通过使用在视频显示装置的图像屏幕上产生的线栅格的线结构作为数模转换器来实现的。 将视频信号的所选行的各个像素的可能的数字值的范围分配为线栅格的各行的参考值，并且在线光栅的每个行周期期间，元素的数字值被比较 具有参考价值的继承。 当在线光栅的任何行周期期间，比较值同意图像屏幕瞬间增亮，使得所选行的每个图像元素在屏幕上以由其数字值确定的垂直位移表示，使得幅度曲线类似 产生具有水平时间轴的波形图。 在本发明的另一个实施例中，被布置为显示从视频信号的各行取出的所选择的图像元素的幅度曲线，将参考值分配给显示装置的线条光栅的相应列。 结果是在具有垂直时间轴的图像屏幕上产生一个波形图。

公开(公告)号：US4220965A

公开(公告)日：1980-09-02

申请号：US912525

申请日：1978-06-05

申请人： Jurgen Heitmann ,  Hans-Peter Maly

发明人： Jurgen Heitmann ,  Hans-Peter Maly

IPC分类号： H04N5/262 ,  H04N9/74 ,  H04N9/535 ,  H04N3/22 ,  H04N5/22

CPC分类号： H04N9/74

摘要： A complete analog color-T.V. signal is separated into a luminance component and a color component. Each component is digitalized and then written into an RAM sequentially using a first addressing schedule for the write-in. The information is then read-out using a different addressing schedule for the read-out. The thusly read out digitalized components are converted back into analog form and combined to form another complete analog color T.V. signal. This technique makes possible a variety of special effects, including horizontal and/or vertical image compression, the display of a half image and alongide it a mirror-symmetrical version thereof, the storage of four color T.V. images in a manner which is interleaved in both the x and y directions of the memory, and others.

摘要翻译： 完整的模拟颜色T.V。 信号被分成亮度分量和颜色分量。 每个组件被数字化，然后使用写入的第一寻址调度顺序地写入到RAM中。 然后使用不同的寻址时间表读出该信息。 这样读出的数字化组件被转换成模拟形式并组合以形成另一个完整的模拟颜色T.V.信号。 这种技术使得可以进行各种特殊效果，包括水平和/或垂直图像压缩，半图像的显示以及它的镜像对称版本，四种彩色电视图像以两种方式交错的方式存储 内存的x和y方向等。

公开(公告)号：US4164749A

公开(公告)日：1979-08-14

申请号：US808700

申请日：1977-06-21

申请人： Jurgen Heitmann ,  Hans-Peter Maly

发明人： Jurgen Heitmann ,  Hans-Peter Maly

IPC分类号： H04N11/04 ,  H04N9/32 ,  H04N9/39

CPC分类号： H04N11/04

摘要： An analog PAL color television signal which is to be encoded is passed through a comb filter to separate the signal into a chrominance component and a luminance component each having a carrier frequency. Each signal is then separately scanned at a rate which is directly related to the color carrier frequency (4.43 MHz) of the signal. The luminance signal is fed to a scanning and holding circuit which scans it at a rate of twice the color carrier frequency or 8.86 MHz. The chrominance signal is fed to a scanning and holding circuit which scans it at a rate which is one-half the color carrier frequency of 2.21 MHz. This scanning and holding of each component signal converts the signals into a corresponding PAM signal. Each PAM signal is then quantized and encoded in a PCM coder. The resulting signals are applied to a digital combiner which thereby produces a digital color video signal.

摘要翻译： 要被编码的模拟PAL彩色电视信号通过梳状滤波器将信号分离成色度分量和各自具有载波频率的亮度分量。 然后以与信号的色彩载波频率（4.43MHz）直接相关的速率分别扫描每个信号。 亮度信号被馈送到以彩色载波频率或8.86MHz的两倍的速率扫描的扫描和保持电路。 色度信号被馈送到扫描和保持电路，扫描和保持电路以2.21MHz的彩色载波频率的一半的速率扫描它。 每个分量信号的扫描和保持将信号转换成相应的PAM信号。 然后将每个PAM信号在PCM编码器中进行量化和编码。 所得信号被施加到数字组合器，从而产生数字彩色视频信号。

公开(公告)号：US4445135A

公开(公告)日：1984-04-24

申请号：US317421

申请日：1981-11-02

申请人： Jurgen Heitmann ,  Hans-Peter Maly

发明人： Jurgen Heitmann ,  Hans-Peter Maly

IPC分类号： H04N5/12 ,  H04N5/073 ,  H04N9/44 ,  H04N9/475 ,  H04N9/46 ,  H04N5/04

CPC分类号： H04N5/0736

摘要： A digital main store having a capacity of one field and a buffer store of much lower capacity upstream of the main store are so arranged that the buffer control controls the buffer store to compensate frequency differences between an input television signal and a reference signal. An address generator controls the main store to compensate phase differences between the two signals.

摘要翻译： 具有一个场容量的数字主存储器和在主存储器上游的低容量的缓冲器存储器被布置成使得缓冲器控制器控制缓冲存储器以补偿输入电视信号和参考信号之间的频率差。 地址发生器控制主存储器来补偿两个信号之间的相位差。

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。