公开(公告)号：WO1993017419A1

公开(公告)日：1993-09-02

申请号：PCT/US1993000476

申请日：1993-01-19

Applicant: AMPEX SYSTEMS CORPORATION

Inventor： AMPEX SYSTEMS CORPORATION ,  SHIH, Lionel, C. ,  WOOD, Tracy, G.

IPC: G11B20/12

CPC classification number: G06F3/0601 ,  G06F2003/0698 ,  G11B5/00878 ,  G11B15/087 ,  G11B20/10 ,  G11B20/1209 ,  G11B20/1833 ,  G11B20/1879 ,  G11B27/032 ,  G11B27/036 ,  G11B27/107 ,  G11B27/3027 ,  G11B27/32 ,  G11B27/322 ,  G11B27/328 ,  G11B27/34 ,  G11B27/36 ,  G11B2220/90

Abstract: A helical type tape recording and reproducing system records blocks of user data of predetermined size by reformatting the user data blocks into physical blocks that are recorded on tape, with the physical blocks being recorded as double frames. Each double frame is recorded on a set of successive helical tracks, preferably 32 tracks. Each double frame has system format data interleaved with the user data block data which identifies the double frame as being of a particular type. The present invention is directed to the types of double frames that are used to begin a recording, particularly an append recording which involves recording by the system at a previously recorded tape which may have been recorded by a different system, as well as the types of double frames that are used to end a recording.

Abstract translation: 螺旋型磁带记录和再现系统通过将用户数据块重新格式化为记录在磁带上的物理块来记录预定大小的用户数据块，其中物理块被记录为双帧。 每个双框被记录在一组连续的螺旋轨道上，优选地记录在32个轨道上。 每个双帧具有与标识双帧作为特定类型的用户数据块数据交错的系统格式数据。 本发明涉及用于开始记录的双帧的类型，特别是附加记录，其涉及系统在可能由不同系统记录的先前记录的磁带上的记录，以及类型 用于结束录音的双帧。

公开(公告)号：WO1993013628A1

公开(公告)日：1993-07-08

申请号：PCT/US1992010922

申请日：1992-12-17

Applicant: AMPEX SYSTEMS CORPORATION

Inventor： AMPEX SYSTEMS CORPORATION ,  COLEMAN, Charles, H. ,  MILLER, Sidney, D. ,  SMIDTH, Peter

IPC: H04N11/04

CPC classification number: H04N5/9264 ,  H04N9/8047 ,  H04N11/044 ,  H04N19/124 ,  H04N19/14 ,  H04N19/146 ,  H04N19/176 ,  H04N19/186 ,  H04N19/60 ,  H04N19/88

Abstract: The present invention provides a technique for a color imaging system having a luminance component and two color difference (chrominance) components (10, 12, 14, 16, 18, 20, 24), which allots more space in the compressed data stream to the signal component of greater information content or complexity; that is, which combines the encoding of the components of the data representing a common portion of an image in response to the actual needs of the component, prior to encoding the combined data. To this end, the calculation of the quantizing factors (32, 34) considers the combined information content of both the luminance and chrominance components for the same image location. Thus, low chrominance complexity allows the transmission (42, 44) of more of the luminance information, and vice versa. The system also provides for predetermining the relative complexity of the signal components to thus pre-allot the amount of space for each signal component in the compressed data stream in proportion to its measured complexity.

Abstract translation: 本发明提供了一种具有亮度分量和两个色差（色度）分量（10,12,14,16,18,20,24）的彩色成像系统的技术，其将压缩数据流中的更多空间分配给 信号分量较大的信息内容或复杂度; 也就是说，在对组合数据进行编码之前，其组合了表示图像的公共部分的数据的组件的编码以响应于组件的实际需要。 为此，量化因子（32,34）的计算考虑了相同图像位置的亮度和色度分量的组合信息内容。 因此，低色度复杂度允许更多的亮度信息的传输（42,44），反之亦然。 该系统还提供预测信号分量的相对复杂度，从而按照其测量的复杂度按比例预先分配压缩数据流中每个信号分量的空间量。

公开(公告)号：WO1992022892A1

公开(公告)日：1992-12-23

申请号：PCT/US1992005144

申请日：1992-06-18

Applicant: AMPEX SYSTEMS CORPORATION ,  MAGNUSSON, Steven, L. ,  ESHEL, Abraham

Inventor： AMPEX SYSTEMS CORPORATION

IPC: G11B05/52

CPC classification number: G11B5/534

Abstract: A helical tape scanner (10) in which the stationary lower drum (16) includes a narrow upper ridge (18) which is offset from the axis of the rotatable upper drum (14) in a direction toward the end of scan. The video tape moves in a helical path from the stationary lower drum (16) over the offset upper ridge to the rotatable upper drum (16) which includes the video read/write heads (22) to transfer signals to and from the tape (12).

Abstract translation: 一种螺旋带式扫描器（10），其中固定的下滚筒（16）包括在朝向扫描结束的方向上偏离可旋转的上滚筒（14）的轴线的窄的上脊（18）。 视频磁带以固定的下鼓（16）在偏移的上脊上方的螺旋路径移动到包括视频读/写头（22）的可旋转上鼓（16），以将信号传送到带（12） ）。

公开(公告)号：WO1994015336A1

公开(公告)日：1994-07-07

申请号：PCT/US1993008415

申请日：1993-09-08

Applicant: AMPEX SYSTEMS CORPORATION

Inventor： AMPEX SYSTEMS CORPORATION ,  LILLEY, Martin, A.

IPC: G11B15/18

CPC classification number: H04N5/932 ,  G11B15/1875 ,  G11B15/467 ,  G11B27/005 ,  H04N5/783

Abstract: A method of tape speed override (TSO) speed control varies the frequency of a servo reference signal and at the same time provides audio clocks which vary proportionately to the servo reference. Further, the TSO control system provides an ability to measure a phase difference of signals generated in a TSO mode of operation (when the speed is nominally correct) with the reference signals to which these generated signals would be locked in a normal PLAY mode such that a system processor can reduce the phase error between the generated and reference signals to zero, thus allowing normal PLAY lock mode to be re-established.

Abstract translation: 磁带速度倍率（TSO）速度控制的方法改变伺服参考信号的频率，同时提供与伺服参考成比例的音频时钟。 此外，TSO控制系统提供测量在TSO操作模式（当速度在名义上正确时）产生的信号的相位差的能力，其中这些产生的信号将被锁定在正常播放模式中的参考信号，使得 系统处理器可以将生成的和参考信号之间的相位误差降低到零，从而允许重新建立正常的PLAY锁定模式。

公开(公告)号：WO1994011968A1

公开(公告)日：1994-05-26

申请号：PCT/US1993008270

申请日：1993-09-02

Applicant: AMPEX SYSTEMS CORPORATION

Inventor： AMPEX SYSTEMS CORPORATION ,  VARIAN, George, R.

IPC: H04L07/04

CPC classification number: H04L7/043

Abstract: Input data symbols are written in a write buffer (120) then to a sync adder (200), which appends a pseudo randomly (PN) generated (800) sync bit to the MSB position of a four-symbol sync word data field to generate a sync word. Sync words might be randomized (900) and sent to a receiver (180) where synchronization is recovered (300) and de-randomized (900). Sync recovery involves the receiver (180) re-gerenating the same PN sequence that was generated at the transmitter (170). When the sync bit position is found, the data stream is assembled into fixed length sync words and written into the read buffer (150) at an address derived from the position of the sync bit in the PN sequence. Error rate measurement involving comparing a received PN sequence with a reconstructed PN sequence.

Abstract translation: 输入数据符号被写入到写入缓冲器（120）中，然后写入同步加法器（200），该同步加法器将伪随机（PN）产生的（800）同步位附加到四符号同步字数据字段的MSB位置，以产生 同步字 同步字可以被随机化（900）并发送到接收器（180），其中恢复同步（300）和去随机化（900）。 同步恢复涉及接收机（180），重新布置在发射机（170）处产生的相同的PN序列。 当找到同步位位置时，将数据流组装成固定长度的同步字，并以从PN序列中同步位的位置导出的地址写入读缓冲器（150）。 误差率测量涉及将接收的PN序列与重建的PN序列进行比较。

公开(公告)号：WO1994011952A1

公开(公告)日：1994-05-26

申请号：PCT/US1993010516

申请日：1993-11-03

Applicant: AMPEX SYSTEMS CORPORATION

Inventor： AMPEX SYSTEMS CORPORATION ,  KLINGER, Keith, L.

IPC: H03M05/12

CPC classification number: H03M5/12 ,  G11B20/1403 ,  H04L7/027

Abstract: In a digital audio or digital video recording channel, a pseudo clock extractor receives a reference clock (212, 306) having a periodicity n times (n >/= 4) or preferably 2 times (n >/= 2) the frequency of an audio data clock signal, the reference clock triggering in and synchronizing to a biphase-mark encoded data stream (222, 302). Data transitions in the data stream are detected and each transition resets a modulo-counter (240) to a pre-specified value so that in combination with the reference signal, the audio data clock signal (242, 326) is synchronous to the triggered-in data stream, the audio data clock rising transition edges being near half-bit cell centers of the triggered-in data stream.

Abstract translation: 在数字音频或数字视频记录通道中，伪时钟提取器接收具有周期性n倍（n> 4 = 4）或优选2 / = 2）的参考时钟（212,306） 音频数据时钟信号的频率，参考时钟触发并与双相标记编码数据流（222,302）同步。 检测数据流中的数据转换，并且每个转换将模计数器（240）重置为预定值，使得与参考信号组合，音频数据时钟信号（242,326）与触发 - 在数据流中，音频数据时钟上升转换边缘接近触发数据流的半位单元中心。

公开(公告)号：WO1994001953A1

公开(公告)日：1994-01-20

申请号：PCT/US1993006294

申请日：1993-07-01

Applicant: AMPEX SYSTEMS CORPORATION

Inventor： AMPEX SYSTEMS CORPORATION ,  BROST, Andrew, C. ,  GORDON, Donald, P.

IPC: H04L25/49

CPC classification number: H04L25/4904 ,  G11B20/1419 ,  H03M5/12

Abstract: A method and apparatus is described for decoding a data stream in Manchester I encoded format with an ANSI sync, wherein the apparatus includes a first counter for counting clock pulses for a one-half data bit cell interval in increments of 1/4 the data bit cell interval, and a second counter for counting for two data one-half bit cell intervals. For decoding, there is provided a two input (plus sample clock) state machine responsive at one input to the detection of transitions or edges in the sampled encoded data stream, and at the other input, responsive to conditional and comparative determinations based on the input data and the processed outputs of the two counters and memory (the register). The logic for the other input provides a count of clock pulses for a given transition interval and utilizes the most recent stored count information from a preceding bit cell for processing bits in the next bit processing interval, with the processing in each bit period being iterated and updated until a prescribed state transition sequence is detected, after which the decoder is locked. The logic includes the first counter for counting the duration of one half bit cell intervals, the second counter for counting the duration of full bit cell intervals, first and second comparators, a register which stores the half bit cell count, and a multiplexer for selectively storing in the register either the present full interval count or the full interval count divided by two. The determination of the output of the multiplexer is dependent upon the output of the state machine, which determines which of the two values to load into the register. The output of the register is compared in the first comparator to clear the first counter at a time interval equal to the last stored one-half bit period, or after two successive quarter bit cell intervals. The inputs to the second comparator include the output of the first counter and the output of the register divided by two, with the output of the second comparator providing the second input to the state machine.

Abstract translation: 描述了用ANSI同步对曼彻斯特编码格式的数据流进行解码的方法和装置，其中该装置包括第一计数器，用于以1/2的数据比特为增量计数二分之一数据位单元间隔的时钟脉冲 以及用于计数两个数据半位单元间隔的第二计数器。 为了解码，提供了一个两个输入（加样本时钟）状态机，在一个输入端响应于采样的编码数据流中的转换或边沿的检测，另一个输入响应于基于输入的条件和比较确定 数据和两个计数器和存储器（寄存器）的已处理输出。 用于另一输入的逻辑提供给定转换间隔的时钟脉冲计数，并利用来自前一位单元的最新存储的计数信息来处理下一位处理间隔中的位，每个位周期中的处理被迭代， 更新直到检测到规定状态转换序列，然后解码器被锁定。 该逻辑包括用于对半位单元间隔的持续时间进行计数的第一计数器，用于计数全位元单元间隔的持续时间的第二计数器，第一和第二比较器，存储半位单元计数的寄存器，以及用于选择性地 在寄存器中存储当前的全部间隔计数或全部间隔计数除以2。 多路复用器输出的确定取决于状态机的输出，该输出决定了将两个值中的哪一个加载到寄存器中。 在第一比较器中比较寄存器的输出，以等于最后存储的半个半周期的时间间隔，或在两个连续的四分之一位单元间隔之后，清除第一个计数器。 第二比较器的输入包括第一计数器的输出和寄存器的输出除以2，第二比较器的输出向状态机提供第二输入。

公开(公告)号：WO1994001862A1

公开(公告)日：1994-01-20

申请号：PCT/US1993006295

申请日：1993-07-01

Applicant: AMPEX SYSTEMS CORPORATION

Inventor： AMPEX SYSTEMS CORPORATION ,  MAGNUSSON, Steven, L. ,  LUBIN, James, K.

IPC: G11B05/588

CPC classification number: G11B5/588 ,  G11B5/53 ,  G11B5/534

Abstract: A flexural pantographic mount for use in a helical scan magnetic tape transport employing a closed loop servo system having a specified frequency bandwidth is disclosed. The mount is a boxed leaf stiffened flexural pantograph mount, for holding and varying the position of a moveable head in a helical scan automatic scan tracking magnetic tape transport. The mount exhibits an acceptably low primary mode stiffness and a suitably increased higher order mode stiffness with increased resistance to torsional stresses and is adapted for use in a magnetic tape transport employing a closed loop servo system having a specified frequency bandwidth. The mount includes a moveable body such as a magnetic transducing head assembly coupled at one end of first and second parallel spaced apart elongated flexible flexural pantographic leaves configured at the opposite free ends thereof for attachment to a fixed body. Each leaf includes first and second integrally formed and bent leaf edge extensions, which act as side stiffeners. A triangularly configured opening and a trapezoidally configured opening are formed in each leaf with each opening being configured to include tab projections for bending into the opening to provide transverse or lateral stiffening. An auxiliary web-like stiffening member is added to each leaf in the space therebetween, each auxiliary stiffener being separately formed and configured for attachment to the respective leaf to the side stiffeners and the tab projections of the openings to form a box-like cross-sectional configuration in conjunction with the side leaf edge extensions. The main body portion of each leaf and the edge extensions of the auxiliary stiffeners are configured, dimensioned and arranged for connection to one another in both the longitudinal and transverse directions. The openings are formed in each leaf at locations such that the flexing surface of the leaves, at the connection to the fixed body and at the connection to the moveable body, are smaller width strap sections, substantially less than the width of the corresponding portion of the leaf.

Abstract translation: 公开了一种用于采用具有指定频率带宽的闭环伺服系统的螺旋扫描磁带传输中的弯曲式集合式安装座。 该安装座是一个装箱的叶片加强的弯曲伸缩式托架，用于在螺旋扫描自动扫描跟踪磁带传输中保持和改变可移动头部的位置。 安装座具有可接受的低初级刚度和适当增加的高阶模量刚度，并且具有增加的抗扭转应力，并适用于采用具有指定频率带宽的闭环伺服系统的磁带传输。 安装座包括一个可移动的主体，例如在第一和第二平行间隔开的​​细长柔性弯曲集合叶片的一端处连接的磁性传感头组件，其在相对的自由端配置，用于固定到固定体上。 每个叶片包括第一和第二整体形成和弯曲的叶缘延伸部，其作为侧加强件。 在每个叶片中形成三角形构造的开口和梯形构造的开口，每个开口构造成包括用于弯曲到开口中的突出部分以提供横向或横向加强。 在它们之间的空间中的每个叶片上添加辅助的网状加强构件，每个辅助加强件被单独地形成并且构造成用于附接到相应的叶片到侧面加强件和开口的翼片突起，以形成盒状横截面， 结合侧叶边缘延伸部分的剖面结构。 每个叶片的主体部分和辅助加强件的边缘延伸部构造成尺寸和布置成在纵向和横向方向上彼此连接。 这些开口形成在每个叶片的位置处，使得叶片的弯曲表面在与固定体的连接处和与可移动体的连接处是较小的宽度带部分，基本上小于相应部分的宽度 叶子。

公开(公告)号：WO1993021630A1

公开(公告)日：1993-10-28

申请号：PCT/US1993003319

申请日：1993-04-09

Applicant: AMPEX SYSTEMS CORPORATION

Inventor： AMPEX SYSTEMS CORPORATION ,  KUDERKA, John, V.

IPC: G11B15/20

CPC classification number: G11B15/026 ,  G11B15/20 ,  G11B15/6653 ,  G11B33/14

Abstract: A method and apparatus incorporated in a magnetic tape drive serving as a non-video data processing peripheral provide for magnetic tape wear protection during periods of time when the tape is stationary relative to a rotating head drum around which the tape is at least partially wound. A variably patterned tape movement sequence and a tape protection sequence are initiated in response to a host-directed tape stop instruction thereby keeping the tape wear at any particular spot on the tape to a minimum. These sequences, while in force, may be overridden by a subsequent tape move instruction coming from the host.

Abstract translation: 结合在用作非视频数据处理外围的磁带驱动器中的方法和装置在磁带相对于磁带至少部分缠绕的转动磁头磁带固定的时间段内提供磁带磨损保护。 响应于主导引导的磁带停止指令启动可变图案化磁带移动顺序和磁带保护顺序，从而将磁带上的磁带磨损保持在磁带上的任何特定位置。 这些序列在有效时可能被来自主机的后续磁带移动指令所覆盖。

公开(公告)号：WO1993017425A1

公开(公告)日：1993-09-02

申请号：PCT/US1993000528

申请日：1993-01-21

Applicant: AMPEX SYSTEMS CORPORATION

Inventor： AMPEX SYSTEMS CORPORATION ,  SHIH, Lionel, C.

IPC: G11B20/18

CPC classification number: G11B20/1883 ,  G11B5/0086 ,  G11B15/1875 ,  G11B15/4673 ,  G11B20/10 ,  G11B20/182 ,  G11B20/1833 ,  G11B20/1879 ,  G11B27/032 ,  G11B27/036 ,  G11B27/107 ,  G11B27/11 ,  G11B27/3027 ,  G11B27/32 ,  G11B27/322 ,  G11B27/328 ,  G11B27/34 ,  G11B27/36 ,  G11B2220/65 ,  G11B2220/90

Abstract: A recording and reproducing system records blocks of user data of predetermined size by reformatting the user data blocks into physical blocks that are recorded on tape. Each physical block is recorded as a double frame on a set of successive helical tracks, preferably 32 tracks. The system has the capability of verifying whether a physical block has been accurately recorded, and if not, the system automatically rewrites the physical block downstream without stopping or repositioning the tape. If an accuracy verification confirmation does not occur until a next physical block is being recorded, the system demarks or invalidates that physical block being written, and rewrites both the failed physical block and that following physical block downstream of that physical block being written.

Abstract translation: 记录和再现系统通过将用户数据块重新格式化为记录在磁带上的物理块来记录预定大小的用户数据块。 每个物理块被记录为一组连续螺旋轨道上的双帧，优选地为32个轨道。 该系统具有验证物理块是否已被准确记录的能力，如果没有，则系统将自动重写物理块，而不停止或重新定位磁带。 如果在记录下一个物理块之前不会发生精确度验证确认，则系统将该物理块写入或重新排除该物理块，并将该物理块的下一个物理块重新写入被写入的物理块。