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1. 发明授权

US5373513A Shift correction code system for correcting additive errors and synchronization slips 失效
标题翻译：用于校正加法误差和同步滑移的移位校正码系统
公开(公告)号：US5373513A
公开(公告)日：1994-12-13
申请号：US745788
申请日：1991-08-16
申请人： Dennis G. Howe , Hugh M. Hilden , Edward J. Weldon, Jr.
发明人： Dennis G. Howe , Hugh M. Hilden , Edward J. Weldon, Jr.
IPC分类号： G11B20/14 , G11B20/18 , H03M13/31 , H03M13/33 , G06F11/00 , H03M13/00 , H04L1/00
CPC分类号： G11B20/1833 , G11B20/1426 , H03M13/31 , H03M13/33
摘要： In a shift correction decoder which processes d,k-constrained RLL data that is encoded in accordance with a shift correction code whose symbols in GF(p) comprise modulo p reductions of cumulative sums of successive run symbols of the RLL data (where p is an odd prime), additive errors (i.e., drop-out and drop-in errors) in the received RLL data are corrected by relying in part on information pertaining to the sequence of the polarities of successive 1-bits in the received RLL data. The polarity information is used to either insert missing 1-bits (due to drop-outs) or delete spurious 1-bits (due to drop-ins) and specify to the shift correction decoder the location of an additive error as an erasure. Synchronization slips are corrected by pre-multiplying the received codeword polynomial by a factor which reduces to two the number of errors created by a single synchronization slip. GF(p) is selected such that p.ltoreq.k-d+ 1 and the minimum distance of the shift correction code is selected to be sufficient to enable correction of a limited number of shift errors, additive errors and synchronization slips within one received codeword.
摘要翻译：在移位校正解码器中，处理按照GF（p）中的符号包括RLL数据的连续运行符号的累积和的模p减少的移位校正码编码的d，k约束RLL数据（其中p是奇数素数），接收的RLL数据中的加法误差（即，丢失和插入误差）通过部分地依赖于与所接收的RLL数据中的连续1位的极性的序列有关的信息来校正。极性信息用于插入丢失的1位（由于丢弃）或删除寄存1位（由于插入），并将移位校正解码器指定加法误差的位置作为擦除。通过将接收到的码字多项式预乘以由单个同步滑差产生的误差数量减少到两倍的因子来校正同步滑移。选择GF（p）使得p <= k-d + 1，并且选择移位校正码的最小距离足以使得能够修正一个接收码字内的有限数量的移位误差，加法误差和同步块。

2. 发明授权

US4577306A Method for optically writing and/or reading information on optical recording elements 失效
标题翻译：光学记录元件光学写入和/或读取信息的方法
公开(公告)号：US4577306A
公开(公告)日：1986-03-18
申请号：US719622
申请日：1985-04-02
申请人： Dennis G. Howe , Joseph J. Wrobel
发明人： Dennis G. Howe , Joseph J. Wrobel
IPC分类号： G11B7/004 , G11B7/013 , G11B7/24 , G11B7/00
CPC分类号： G11B7/24085 , G11B7/004 , G11B7/24
摘要： A method for writing and/or reading information on an optical recording element, such as an optical disk, utilizes a recording element comprising a recording layer having physical and optical properties which are optimized for phase-shift read-out. The optical properties of the recording layer give rise to a non-linear relative phase shift/layer thickness curve which, in combination with a predetermined nominal thickness of the recording layer, enhances the signal-to-noise ratio of the read-out signal.
摘要翻译：用于在诸如光盘的光学记录元件上写入和/或读取信息的方法利用包括具有物理和光学特性的记录层的记录元件，其被优化用于相移读出。记录层的光学特性产生了非线性的相对相移/层厚度曲线，其与记录层的预定标称厚度相结合，增强了读出信号的信噪比。

3. 发明授权

US4530082A Optical disc write/read employing passive focus maintenance 失效
标题翻译：采用被动对焦维护的光盘写/读
公开(公告)号：US4530082A
公开(公告)日：1985-07-16
申请号：US392861
申请日：1982-06-28
申请人： Dennis G. Howe , James A. Barnard
发明人： Dennis G. Howe , James A. Barnard
IPC分类号： G02B7/28 , G11B7/08 , G11B7/09 , G11B7/095 , G11B7/12
CPC分类号： G11B7/0908
摘要： The quality of spot-focus of optical writing and reading light upon the information surface of a flexible optical disc is passively enhanced by (1) rotating the disc with its neutral plane stabilized in space and (2) directing such light through the optical disc support into precise spot-focus on the information surface. With this technique spherical aberration induced by the disc support compensates for thickness variation of the support. Various structural embodiments are disclosed.
摘要翻译：光学写入和读取光在柔性光盘的信息表面上的点聚焦的质量被被动地增强：（1）旋转盘，其中性平面在空间中稳定，以及（2）将这种光引导通过光盘支架在信息表面上进行精确的点聚焦。利用这种技术，由盘支撑引起的球面像差补偿了支撑件的厚度变化。公开了各种结构实施例。

4. 发明授权

US4236183A Optical configurations for a rotating polygon film scanner 失效
标题翻译：旋转多边形胶片扫描仪的光学配置
公开(公告)号：US4236183A
公开(公告)日：1980-11-25
申请号：US68031
申请日：1979-08-20
申请人： Dennis G. Howe
发明人： Dennis G. Howe
IPC分类号： H04N3/36
CPC分类号： H04N3/36
摘要： Optical configurations for a rotating polygon film scanner for scanning film such as motion picture film or slide transparencies to produce a television signal are disclosed. The film scanner includes a solid-state line sensing array for scanning the image of a film frame in a direction generally perpendicular to the length of the film, and a rotating multifacet mirror such as a reflecting polygon for displacing the image relative to the line sensing array in a direction generally parallel with the length of the film. The optical configurations include the polygon mirror, a film gate, and a scan lens for forming an image of the film in the gate on the solid-state line sensing array. The scan lens is located between the line sensing array and the polygon mirror to provide on-axis scanning in the direction parallel with the length of the film. The film gate is configured to constrain the film to a surface such that the portion of the image impinging on the line sensing array is always in focus as the image is displaced by the polygon mirror. The shape of this surface is controlled by the relationship between the distance from the center of the film gate to the polygon mirror and the radius of a circle inscribed within the polygon mirror. In one configuration, the surface is a portion of a cylinder; in another, the surface is substantially flat. To reduce distortion of the image scanned across the line sensor, the optical axis of the scan lens, the axis of rotation of the polygon and the center of the film gate lie in a common plane.
摘要翻译：公开了用于扫描胶片（例如电影胶片或幻灯片幻灯片）以产生电视信号的旋转多边形胶片扫描仪的光学配置。该胶卷扫描器包括一个固态线感测阵列，用于沿大致垂直于胶片长度的方向扫描胶片框架的图像;以及旋转的多面镜，例如反射多边形，用于使图像相对于线感测在与膜的长度大致平行的方向上排列。光学配置包括多面镜，薄膜栅极和用于在固态线感测阵列的栅极中形成薄膜的图像的扫描透镜。扫描透镜位于线感测阵列和多面镜之间，以在与胶片长度平行的方向上提供轴上扫描。胶片门被配置为将胶片限制到表面，使得当图像被多面镜移位时，撞击在线感测阵列上的图像的部分总是焦点。该表面的形状通过从胶片门的中心到多面镜的距离与内窥在多面镜内的圆的半径之间的关系来控制。在一种构造中，表面是气缸的一部分; 在另一个中，表面基本上是平的。为了减少在线传感器上扫描的图像的畸变，扫描透镜的光轴，多边形的旋转轴和胶片门的中心位于公共平面中。

5. 发明授权

US5271016A Shift-correcting code system with efficient symbol-to-channel bit transformation 失效
标题翻译：移位校正码系统，具有高效的符号到通道位转换
公开(公告)号：US5271016A
公开(公告)日：1993-12-14
申请号：US632800
申请日：1990-12-24
申请人： Hugh M. Hilden , Dennis G. Howe
发明人： Hugh M. Hilden , Dennis G. Howe
IPC分类号： G11B20/18 , H03M5/14 , H03M5/18 , H03M13/31 , H03M7/46 , H03M13/00
CPC分类号： G11B20/1833 , H03M13/31 , H03M5/145 , H03M5/18
摘要： In a shift-correcting code which represents (d,k)-constrained run-length-limited (RLL) channel data as symbols drawn from GF(p.sup.m), the encoding process produces a set of redundant parity ternary GF(p.sup.m) symbols representing three shift error conditions: forward shift, backward shift and no shift, for p=3 and m=1 for example. The encoder of the invention transforms the parity symbols into (d,k)-constrained RLL channel bits to produce a binary data sequence that can be inserted in the RLL channel data stream without a large number of linking bits to maintain compliance with the (d,k) RLL constraints. A shift error in the RLL channel data representing parity symbols affects no more than one decoded parity symbol. The encoder of the invention efficiently transforms ternary symbols into (d,k)-constrained binary data by coding successive ternary symbols into one of six binary channel words in accordance with (a) the contents of the input ternary symbol and (b) the current state of the encoder, and sets its state to one of two states in preparation for encoding the next ternary symbol. In the first state, the encoder generates one of three channel words each comprising two bits preceded by b zeroes and in the second state generates one of three channel words each comprising two bits preceded by a one and b-1 zeroes, where b is related to d and k so as to maintain the (d,k)-constraints of a number of practically useful RLL codes.
摘要翻译：在代表（d，k）约束游程长度限制（RLL）信道数据作为从GF（pm）绘制的符号的移位校正码中，编码处理产生一组冗余奇偶校验三进制GF（pm）符号，三个移位误差条件：前向移位，后向移位和无移位，例如p = 3和m = 1。本发明的编码器将奇偶校验符号变换为（d，k）约束的RLL信道位，以产生可以插入到RLL信道数据流中的二进制数据序列，而不需要大量链接位，以保持符合（d ，k）RLL约束。表示奇偶码元的RLL信道数据中的移位误差影响不超过一个解码奇偶校验码元。本发明的编码器根据（a）输入三进制符号的内容和（b）当前的数据，将连续的三进制符号编码为六个二进制通道字之一，将三进制符号有效地转换为（d，k）约束二进制数据编码器的状态，并将其状态设置为两个状态之一，以准备对下一个三进制符号进行编码。在第一状态下，编码器产生三个通道字中的一个，每个三个通道字都包含两个前面加上b 0的位，而在第二个状态中，产生三个通道字中的一个，每个通道字包括两个前面加上一个和第一个零的位，其中b相关到d和k，以便维持一些实际有用的RLL码的（d，k）约束。

6. 发明授权

US5257270A Shift-correction code rate-enhancing parity encoding/decoding 失效
标题翻译：移码校正码率增强奇偶编码/解码
公开(公告)号：US5257270A
公开(公告)日：1993-10-26
申请号：US633879
申请日：1990-12-26
申请人： Hugh M. Hilden , Dennis G. Howe , Edward J. Weldon, Jr.
发明人： Hugh M. Hilden , Dennis G. Howe , Edward J. Weldon, Jr.
IPC分类号： H03M5/14 , H03M5/16 , H03M13/31 , H03M13/00 , H03M7/46
CPC分类号： H03M5/145 , H03M13/31 , H03M5/16
摘要： A method for coding/decoding ternary symbols to d,k-constrained binary runs in a way that (i) associates (codes) a number of ternary symbols with a lesser number of d,k-constrained binary runs and (ii) provides that an individual single-shift error in any of the received binary runs that constitute a binary data codeword will cause at most one ternary symbol to be in error in the associated (decoded) ternary symbol codeword. This method allows shift-correction codeword parity checks to be transmitted (i.e., transformed to a d,k-constrained channel data sequence) with increased efficiency, so that the required number of channel bits needed to represent the parity checks is decreased.
摘要翻译：一种将三进制符号编码/解码为d，k-约束二进制运行的方法，其方式是（i）将多个三进制符号与少量的d，k-约束二进制运行相关联（代码），并且（ii）构成二进制数据码字的任何接收到的二进制运行中的单个单次错误将导致至少一个三进制符号在相关联的（解码的）三进制符号码字中是错误的。该方法允许移位校正码字奇偶校验以增加的效率被发送（即，变换为d，k约束信道数据序列），从而减少表示奇偶校验检查所需的所需数量的信道位。

7. 发明授权

US5220568A Shift correcting code for channel encoded data 失效
标题翻译：通道编码数据的移位校正码
公开(公告)号：US5220568A
公开(公告)日：1993-06-15
申请号：US433877
申请日：1989-11-09
申请人： Dennis G. Howe , Edward J. Weldon, Jr. , Hugh M. Hilden
发明人： Dennis G. Howe , Edward J. Weldon, Jr. , Hugh M. Hilden
IPC分类号： G11B20/10 , H03M5/14 , H03M13/27 , H03M13/29 , H03M13/31 , H03M13/33 , H04L7/04
CPC分类号： H03M13/2703 , H03M13/152 , H03M13/29 , H03M13/31 , H03M13/33 , H03M5/145 , H04L7/048 , G11B20/10212 , H04L7/041
摘要： Channel encoded data (for example run length limited encoded data) is further encoded in accordance with a shift correction code prior to transmission. Upon reception, forward and backward shift errors present in the received channel encoded data are corrected by a shift correction decoder. The shift error correction is accomplished using a code, such as (for example) a BCH code over GF(p) or a negacyclic code, which treats each received symbol as a vector having p states. For a single shift error correction, p=3 and there are three states (forward shift, backward shift, no shift). In one embodiment, conventional error correction codewords which encode the user data may be interleaved within successive shift correction codewords prior to channel encoding, thereby enabling the error correction system to easily handle a high rate of randomly distributed shift errors (which otherwise would result in a high rate of short error bursts that exceed the capacity of the block error correction code).
摘要翻译：通道编码数据（例如游程长度限制编码数据）在传输之前根据移位校正码被进一步编码。在接收时，通过移位校正解码器校正存在于接收信道编码数据中的前向和后向移位误差。使用诸如（例如）GF（p）上的BCH码或者负循环码的代码来实现移位误差校正，其将每个接收到的符号视为具有p个状态的向量。对于单次移位误差校正，p = 3，并且有三种状态（前向移位，后向移位，无移位）。在一个实施例中，编码用户数据的常规纠错码字可以在信道编码之前的连续移位校正码字中进行交织，从而使得纠错系统能够容易地处理高速随机分布的移位误差（否则将导致高错误突发速率超过块错误校正码的容量）。

8. 发明授权

US4475183A Optical disk retrieval methods, media and systems employing digital data of high fractional bandwidth 失效
$Optical disk retrieval methods, media and systems employing digital data of high fractional bandwidth$
标题翻译：光盘检索方法，采用高分数带宽数字数据的媒体和系统
公开(公告)号：US4475183A
公开(公告)日：1984-10-02
申请号：US315109
申请日：1981-10-26
申请人： Alan B. Marchant , Dennis G. Howe
发明人： Alan B. Marchant , Dennis G. Howe
IPC分类号： G11B7/005 , G11B7/013 , G11B20/10 , G11B7/00
CPC分类号： G11B7/24085 , G11B20/10009 , G11B7/005
摘要： High information density retrieval method and system which employ the scanning of an optical disk, having a thermally-deformable record layer overlying a reflective support, with a read light beam. The optical disk tracks contain information in the form of variable-width, approximately 0.5.pi. phase-depth, pit regions interleaved between nominal thickness land regions. The pits have varying track lengths within a pit-length range constituting a disk fractional band-width of greater than 4.0 and read light reflected from the tracks is split-detected. The split-detected, electrical analog signal is peak-detected to reconstruct recorded digital data on the disk.
摘要翻译：采用扫描光盘的高信息密度检索方法和系统，其具有覆盖反射支撑件的热变形记录层和读取光束。光盘轨道包含在标称厚度的焊盘区域之间交错的可变宽度，大约0.5pi相深度的凹坑区域的形式的信息。凹坑在凹坑长度范围内具有不同的轨道长度，构成大于4.0的盘分数带宽，并且从轨道反射的读取光被分离检测。分频检测的电气模拟信号被峰值检测，以重建磁盘上的记录数字数据。

9. 发明授权

US4360908A Physically optimized optical disc structure, method and apparatus 失效
标题翻译：物理优化的光盘结构，方法和装置
公开(公告)号：US4360908A
公开(公告)日：1982-11-23
申请号：US124381
申请日：1980-02-25
申请人： Dennis G. Howe , Joseph J. Wrobel
发明人： Dennis G. Howe , Joseph J. Wrobel
IPC分类号： B41M5/00 , G03C1/72 , G11B7/004 , G11B7/013 , G11B7/24 , G11B7/244 , G11B7/00 , G11B7/26
CPC分类号： G11B7/24085 , G11B7/004 , G11B7/24
摘要： Optical disc structure physically optimized for real-time recording and playback of high-density information and methods and apparatus pertaining to such disc structure. One disclosed disc embodiment is designed for heat-deformation recording and reflective read-out and, in regard to the chosen reading wave-length, is optimized in recording stratum thickness and optical constants for high sensitivity writing and high contrast, phase interference reading. Another disclosed disc embodiment is further optimized in thickness and optical constants with respect to a chosen writing wavelength to further enhance writing sensitivity and reduce requisite writing power.
摘要翻译：物理上优化的用于实时记录和回放高密度信息的光盘结构以及与该盘结构有关的方法和装置。一种公开的光盘实施例设计用于热变形记录和反射读出，并且关于所选择的读取波长，在记录层厚度和光学常数中被优化用于高灵敏度写入和高对比度，相位干涉读取。另一公开的光盘实施例在相对于所选择的写入波长的厚度和光学常数方面进一步优化，以进一步提高书写灵敏度并降低必要的写入功率。

10. 发明授权

US4205339A Frame storage and retrieval wherein the frame fields are quadrature amplitude modulated on a single carrier 失效
标题翻译：帧存储和检索，其中帧场在单载波上进行正交幅度调制
公开(公告)号：US4205339A
公开(公告)日：1980-05-27
申请号：US926174
申请日：1978-07-20
申请人： Dennis G. Howe
发明人： Dennis G. Howe
IPC分类号： H04N5/92 , H04N1/191 , H04N1/21 , H04N5/91 , H04N5/922 , H04N7/08 , H04N7/173 , H04N5/76
CPC分类号： H04N7/08 , H04N1/1911 , H04N1/217
摘要： Method and apparatus for recording a frame, comprising two fields, of document information on a disc storage device are described. The video signals corresponding to the two fields are used to amplitude modulate quadrature components of a single carrier frequency, each field modulating its own quadrature component. The quadrature amplitude modulated (QAM) carrier components are vectorially combined, the resultant being then angularly modulated on a high frequency carrier which is recorded on the disc storage device. In a preferred embodiment, a frame of information is recorded on the disc storage device along a single closed circular track. The present invention also provides methods for playing back the single track of recorded information for field-sequential video display, hard copy reproduction by a dual-line printer, or hard copy reproduction by a line-sequential printer.
摘要翻译：描述了用于在盘存储装置上记录文档信息的包括两个字段的帧的方法和装置。对应于两个场的视频信号用于幅度调制单个载波频率的正交分量，每个场调制其自己的正交分量。正交幅度调制（QAM）载波分量被矢量地组合，然后将结果在被记录在盘存储设备上的高频载波上成角度地调制。在优选实施例中，信息帧沿着单个封闭的圆形轨道记录在盘存储装置上。本发明还提供了用于播放用于现场顺序视频显示的记录信息的单个轨道，通过双行打印机的硬拷贝再现或者通过行顺序打印机的硬拷贝再现的方法。

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