Recording medium data transmission method and apparatus and data
reproduction method and apparatus
    31.
    发明授权
    Recording medium data transmission method and apparatus and data reproduction method and apparatus 失效
    记录介质数据传输方法及装置及数据再现方法及装置

    公开(公告)号:US5912869A

    公开(公告)日:1999-06-15

    申请号:US626551

    申请日:1996-04-02

    摘要: A data transmission apparatus for transmitting an original data has a converter for converting the original data to sequential data codes. The data code is formed by a combination of HIGH level binary codes and LOW level binary codes. The maximum length of a continuous binary codes of one level, such as HIGH level, in the data codes is limited to T.sub.max, e.g., to 14T, in which T is a unit length representing one binary code, and the minimum length of a continuous binary codes of one level, such as HIGH level, in the data codes is limited to T.sub.min, e.g., 3T. A generator generates a synchronization code. The synchronization code is formed by a combination of HIGH and LOW level binary codes. The synchronization code comprises an identifier having a continuous binary codes of one level, such as HIGH level, with a predetermined length 16T which is 2T greater than T.sub.max. An inserter inserts the synchronization code intermittently in the sequential data codes.

    摘要翻译: 用于发送原始数据的数据发送装置具有用于将原始数据转换为顺序数据代码的转换器。 数据代码由高级二进制代码和低级二进制代码的组合形成。 数据码中一个等级的连续二进制码(如高电平)的最大长度限制在Tmax,例如14T,其中T是表示一个二进制码的单位长度,连续的最小长度 数据码中一级的二进制码(如高电平)被限制为Tmin,例如3T。 生成器生成同步代码。 同步码由高和低电平二进制码的组合形成。 同步码包括具有一个等级的连续二进制码的标识符,例如高电平,具有比Tmax大2T的预定长度16T。 插入器在顺序数据代码中间歇地插入同步代码。

    Aberration detection device and optical information recording and reproducing apparatus
    37.
    发明授权
    Aberration detection device and optical information recording and reproducing apparatus 有权
    畸变检测装置和光信息记录和再现装置

    公开(公告)号:US06430137B1

    公开(公告)日:2002-08-06

    申请号:US09389121

    申请日:1999-09-02

    IPC分类号: G11B700

    摘要: A returning light beam emitted by a light source and reflected by an optical disk is separated by a half mirror, and partitioned and deflected at a hologram into a light beam passing a first region and a light beam passing a second region. The light beam passing the first region is received by a plurality of photo-detectors, and the aberration is detected by comparing the resulting signals. Based on the aberration detection, the aberration of an optical system can be reduced by driving an aberration correction element in real-time.

    摘要翻译: 由光源发射并由光盘反射的返回光束被半反射镜分离,并以全息图分隔和偏转成通过第一区域的光束和通过第二区域的光束。 通过第一区域的光束被多个光电检测器接收,并且通过比较所得到的信号来检测像差。 基于像差检测,可以通过实时驱动像差校正元件来减小光学系统的像差。

    Optical disc having oscillating lands and grooves
    38.
    发明授权
    Optical disc having oscillating lands and grooves 有权
    具有振荡台和槽的光盘

    公开(公告)号:US06373815B1

    公开(公告)日:2002-04-16

    申请号:US09400537

    申请日:1999-09-21

    IPC分类号: G11B700

    摘要: In an optical disc, an ID field contains a plurality of address information, and is preliminarily recorded in convex and concave signals, and is composed of two sets offset by about ½ track pitch toward the internal or external track direction adjacent to the guide track, an information recording field is composed of grooves and lands oscillating at a single frequency in the radial direction, and the grooves and lands alternate in every revolution of the guide track. When w bits of information are included in one period of oscillation, an information unrecorded field between the ID field and information recording field is arranged to have a length of w/10 bits or more and/or w bits or less, and therefore, when recording continuous information data such as video data, it is possible to record continuously by generating a clock securely from the oscillating signal, and moreover, the format efficiency is improved, so that a format of a larger capacity is achieved.

    摘要翻译: 在光盘中,ID字段包含多个地址信息,并且预先记录在凸和凹信号中,并且由邻近导轨的内部或外部轨道方向偏移大约1/2道距的两组组成, 信息记录区域由在径向上以单个频率振荡的凹槽和平台组成,并且凹槽和平台在导轨的每转一圈中交替。 当信息的w位被包括在一个振荡周期中时,ID字段和信息记录字段之间的信息未记录字段被布置为具有w / 10位或更多个和/或w位或更少的长度,因此,当 记录诸如视频数据的连续信息数据,可以通过从振荡信号安全地产生时钟来连续记录,此外,提高格式效率,从而实现更大容量的格式。

    Optical disc having oscillating land and grooves
    39.
    发明授权
    Optical disc having oscillating land and grooves 有权
    具有振荡台和凹槽的光盘

    公开(公告)号:US6167022A

    公开(公告)日:2000-12-26

    申请号:US400538

    申请日:1999-09-21

    摘要: One or more optical discs, each having a ROM field having information with a length of at least one track formed in convex and concave pit rows, and a rewritable field capable of rewriting the information with a length of at least one track, an information unrecorded field having a length of at least one track located between the ROM field and rewritable field, the rewritable field having a spiral or concentric guide track oscillating in a radial direction, the ROM field having spiral or concentric convex and concave pit rows, and at least a part field at the rewritable field side of the information unrecorded field has a transition field having a spiral or concentric guide track oscillating in the radial direction continuously or intermittently and a track pitch To of the ROM field and a track pitch Tw between grooves and lands of the rewritable field have values such that To>Tw.

    摘要翻译: 一个或多个光盘,每个光盘具有ROM领域,其具有形成在凸凹槽行中的至少一个轨道的长度的信息,以及能够重写具有至少一个轨道长度的信息的可重写字段,未记录的信息 具有位于ROM场和可重写场之间的至少一个轨道的长度的场,所述可重写场具有沿径向方向振荡的螺旋或同心导轨,所述ROM场具有螺旋或同心的凸凹坑行,并且至少 在信息未记录场的可重写场侧的部分场具有连续或间歇地沿径向振荡的螺旋或同心导轨的过渡场和ROM场的轨道间距To和凹槽和脊的轨道间距Tw 的可重写字段具有值To to Tw。

    Code conversion method and apparatus, code recording medium, code
recording apparatus and code reproducing apparatus
    40.
    发明授权
    Code conversion method and apparatus, code recording medium, code recording apparatus and code reproducing apparatus 失效
    代码转换方法和装置,代码记录介质,代码记录装置和代码再现装置

    公开(公告)号:US5898394A

    公开(公告)日:1999-04-27

    申请号:US900436

    申请日:1997-07-25

    摘要: A code conversion method and apparatus is provided for scrambling and modulating data. The method and apparatus includes scrambling an input main data unit based on any of plural types of pseudo-random number sequences, and modulating the scrambled main data unit based on any of plural types of modulation data. An output main data unit is produced from the modulated main data unit, and a calculated value representing a difference between a number of 0 bits and a number of 1 bits included in the output main data unit is obtained. Any of the modulation data is then selected dependent upon the calculated value. The method and apparatus further includes determining whether or not a variation of the calculated value has exceeded a predetermined threshold, newly selecting another pseudo-random number sequence used for the step of scrambling if it is determined that the variation of the calculated value has exceeded the predetermined threshold value, and re-scrambling the input main data unit based on the newly selected pseudo-random number sequence.

    摘要翻译: 提供了用于对数据进行加扰和调制的代码转换方法和装置。 所述方法和装置包括基于多种类型的伪随机数序列中的任何一种对输入主数据单元进行加扰,并且基于多种类型的调制数据中的任何一种调制加扰的主数据单元。 从调制主数据单元产生输出主数据单元,得到表示输出主数据单元中包含的0位数与1位数之间的差的计算值。 然后根据计算值选择任何调制数据。 所述方法和装置还包括:确定计算值的变化是否已经超过预定阈值,如果确定计算值的变化已经超过所述阈值,则新选择用于加扰步骤的另一伪随机数序列 基于新选择的伪随机数序列重新加扰输入主数据单元。