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71 条记录 (耗时 0.03 秒)

    Apparatus for recording and reproducing data on a disk
    2.
    发明授权
    Apparatus for recording and reproducing data on a disk 失效
    用于在盘上记录和再现数据的装置

    公开(公告)号：US5490126A

    公开(公告)日：1996-02-06

    申请号：US222578

    申请日：1994-04-04

    申请人： Shigeru Furumiya ,  Takeshi Nakajima ,  Yoshinari Takemura

    发明人： Shigeru Furumiya ,  Takeshi Nakajima ,  Yoshinari Takemura

    IPC分类号： G11B7/0045 ,  G11B7/005 ,  G11B7/125 ,  G11B20/10 ,  G11B3/90

    CPC分类号： G11B7/126 ,  G11B7/0045 ,  G11B7/00454 ,  G11B20/10194 ,  G11B7/005

    摘要： In an apparatus for recording data on a rewritable optical disk with a mark edge recording the occurrence of edge shift is compensated for. As a first power of a laser beam is greater than a second power, start and termination ends of each mark are produced by irradiation of the first power and a remaining intermediate portion of the mark is produced by irradiating the first and second powers alternately at equal intervals of a predetermined duration which is shorter than a period of a clock pulse. Also, the start and termination ends of the mark are specifically dislocated corresponding to a length of the mark and lengths of two neighbor spaces before and after the mark.

    摘要翻译： 在具有标记边缘记录的可重写光盘上记录数据的装置被补偿。 由于激光束的第一功率大于第二功率，因此通过照射第一功率产生每个标记的起始和终止端，并且通过以相等的方式交替地照射第一和第二功率来产生标记的剩余中间部分 预定持续时间的间隔比时钟脉冲的周期短。 此外，标记的开始和终止结束与标记之前和之后的两个相邻空格的标记长度和长度相对应地具体脱位。

    Method of recording and reproducing data on a disk
    3.
    发明授权
    Method of recording and reproducing data on a disk 失效
    在磁盘上记录和再现数据的方法

    公开(公告)号：US5636194A

    公开(公告)日：1997-06-03

    申请号：US536118

    申请日：1995-09-29

    申请人： Shigeru Furumiya ,  Takeshi Nakajima ,  Yoshinari Takemura

    发明人： Shigeru Furumiya ,  Takeshi Nakajima ,  Yoshinari Takemura

    IPC分类号： G11B7/0045 ,  G11B7/005 ,  G11B7/125 ,  G11B20/10 ,  G11B7/00

    CPC分类号： G11B7/126 ,  G11B7/0045 ,  G11B7/00454 ,  G11B20/10194 ,  G11B7/005

    摘要： In recording data on a rewritable optical disk with a mark edge recording method, the occurrence of edge shift is compensated for. As a first power of a laser beam is greater than a second power, start and termination ends of each mark are produced by irradiation of the first power and a remaining intermediate portion of the mark is produced by irradiating the first and second powers alternately at equal intervals of a predetermined duration which is shorter than a period of a clock pulse. Also, the start and termination ends of the mark are specifically dislocated corresponding to a length of the mark and lengths of two neighbor spaces before and after the mark.

    摘要翻译： 在利用标记边缘记录方法在可重写光盘上记录数据时，补偿边缘偏移的发生。 由于激光束的第一功率大于第二功率，因此通过照射第一功率产生每个标记的起始和终止端，并且通过以相等的方式交替地照射第一和第二功率来产生标记的剩余中间部分 预定持续时间的间隔比时钟脉冲的周期短。 此外，标记的开始和终止结束与标记之前和之后的两个相邻空格的标记长度和长度相对应地具体脱位。

    Method of maximum likelihood decoding and digital information playback apparatus
    4.
    发明授权
    Method of maximum likelihood decoding and digital information playback apparatus 失效
    最大似然解码方法和数字信息播放装置

    公开(公告)号：US5719843A

    公开(公告)日：1998-02-17

    申请号：US668178

    申请日：1996-06-21

    申请人： Takeshi Nakajima ,  Shigeru Furumiya ,  Yoshinari Takemura ,  Kenji Koishi

    发明人： Takeshi Nakajima ,  Shigeru Furumiya ,  Yoshinari Takemura ,  Kenji Koishi

    IPC分类号： G11B20/10 ,  H03M13/41 ,  G11B7/00

    CPC分类号： G11B20/10148 ,  G11B20/10009 ,  H03M13/41 ,  H03M13/4107 ,  H03M13/6331 ,  H03M13/6343

    摘要： A digital information playback apparatus comprises A/D converter that converts a playback signal into digital data, a maximum likelihood decoder that decodes the quantized data output from the A/D converter to obtain the original digital information, and a timing signal extractor that generates a sampling clock used in the A/D converter, and wherein the maximum likelihood decoder detects the response characteristic of the record/playback system and obtains level fluctuations contained in the playback signal, based on the survival path obtained as a maximum likelihood decoding result, to control the expected multilevel equalized values used in the maximum likelihood decoder, the timing signal extractor obtains level fluctuations, based on the survival path obtained as a maximum likelihood decoding result, and obtains the component of the level fluctuations due to phase shifts of the sampling clock of the VCO to control the phase of the sampling clock of the VCO.

    摘要翻译： 一种数字信息播放装置，包括将重放信号转换为数字数据的A / D转换器，对从A / D转换器输出的量化数据进行解码以获得原始数字信息的最大似然解码器，以及生成 在A / D转换器中使用的采样时钟，其中最大似然解码器基于作为最大似然解码结果获得的生存路径，检测记录/重放系统的响应特性并获得包含在重放信号中的电平波动， 控制在最大似然解码器中使用的期望的多级均衡值，定时信号提取器基于作为最大似然解码结果获得的存活路径获得电平波动，并且获得由于采样时钟的相移引起的电平波动的分量 的VCO来控制VCO的采样时钟的相位。

    Optical disk and optical disk reproduction apparatus
    6.
    发明授权
    Optical disk and optical disk reproduction apparatus 失效
    光盘和光盘再生装置

    公开(公告)号：US5809007A

    公开(公告)日：1998-09-15

    申请号：US729748

    申请日：1996-10-07

    申请人： Yoshinari Takemura ,  Shunji Ohara ,  Takashi Ishida ,  Yoshito Aoki ,  Shigeru Furumiya ,  Toyoji Gushima

    发明人： Yoshinari Takemura ,  Shunji Ohara ,  Takashi Ishida ,  Yoshito Aoki ,  Shigeru Furumiya ,  Toyoji Gushima

    IPC分类号： G11B23/36 ,  G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B20/12

    CPC分类号： G11B7/00745

    摘要： An optical disk of the present invention has one or more recording tracks formed concentrically or spirally on the disk to which data signals are recorded by forming different-length marks and spaces on the tracks. An ID signal combining marks and spaces of two or more predetermined lengths approximately equal to the length of the marks and spaces forming the data signals is recorded to the recording tracks within a predetermined disk area, thus creating the ID signal by aligning the marks and spaces in the radial direction and recording the aligned marks and spaces to adjacent tracks in a predetermined radial disk area. Also, a reproduction apparatus for reproducing signals from the optical disk is disclosed.

    摘要翻译： 本发明的光盘具有通过在轨道上形成不同长度的标记和间隔而同时或螺旋地形成在盘上的一个或多个记录轨道，数据信号被记录在该盘上。 将形成数据信号的标记和间隔的长度大致相等的两个或更多个预定长度的标记和间隔的ID信号记录在预定的磁盘区域内的记录磁道上，从而通过对准标记和空格 在径向方向上并将对准的标记和间隔记录在预定的径向盘区域中的相邻轨迹上。 另外，公开了一种从光盘重放信号的再生装置。

    Optical disk system
    7.
    发明授权
    Optical disk system 失效
    光盘系统

    公开(公告)号：US5400315A

    公开(公告)日：1995-03-21

    申请号：US165560

    申请日：1993-12-13

    申请人： Kenji Koishi ,  Yoshinari Takemura ,  Shigeru Furumiya

    发明人： Kenji Koishi ,  Yoshinari Takemura ,  Shigeru Furumiya

    IPC分类号： H04N5/85 ,  G11B7/00 ,  G11B7/004 ,  G11B20/10 ,  H04N5/92 ,  H04N9/79 ,  H04N9/82

    CPC分类号： H04N9/8216 ,  H04N9/7904

    摘要： An analog-to-digital converter executes analog-to-digital conversion of a first analog video signal at a predetermined sampling frequency "fs". A time base converter converts a time base of an output signal from the analog-to-digital converter at a predetermined time base conversion frequency "ftci". A digital output signal from the time base converter is converted into a corresponding second analog video signal in response to a clock signal of a frequency corresponding to the frequency "ftci". The second analog video signal is converted into an FM video signal recorded on a video region of an optical disk. A binary audio digital signal is converted into a multi-level form digital audio signal. The binary audio digital signal has a data rate corresponding to the frequency "ftci". The multi-level form digital audio signal has a data rate "ftci/n" and 2.sup.n discrete amplitude levels where "n" denotes a predetermined integer. The multi-level form digital audio signal is converted into a corresponding analog audio signal in response to the clock signal of the frequency corresponding to the frequency "ftci". The analog audio signal is converted into an FM audio signal recorded on an audio region of the optical disk. A data signal generator generates a digital data signal at a data rate "ftci/m" where "m" denotes a predetermined integer. The digital data signal is converted into a corresponding analog data signal in response to the clock signal of the frequency corresponding to the frequency "ftci". The analog data signal is converted into an FM data signal recorded on a data region of the optical disk.

    摘要翻译： 模数转换器以预定的采样频率“fs”执行第一模拟视频信号的模数转换。 时基转换器以预定的时基转换频率“ftci”转换来自模数转换器的输出信号的时基。 响应于与频率“ftci”对应的频率的时钟信号，来自时基转换器的数字输出信号被转换成对应的第二模拟视频信号。 第二模拟视频信号被转换成记录在光盘的视频区域上的FM视频信号。 二进制音频数字信号被转换为多电平形式的数字音频信号。 二进制音频数字信号具有对应于频率“ftci”的数据速率。 多级形式数字音频信号具有数据速率“ftci / n”和2n个离散幅度电平，其中“n”表示预定的整数。 响应于对应于频率“ftci”的频率的时钟信号，多级形式的数字音频信号被转换成相应的模拟音频信号。 模拟音频信号被转换成记录在光盘的音频区域上的FM音频信号。 数据信号发生器以数据速率“ftci / m”生成数字数据信号，其中“m”表示预定的整数。 响应于对应于频率“ftci”的频率的时钟信号，将数字数据信号转换成对应的模拟数据信号。 模拟数据信号被转换成记录在光盘的数据区域上的FM数据信号。

    Synchronous clock generator and time-base error corrector
    8.
    发明授权
    Synchronous clock generator and time-base error corrector 失效
    同步时钟发生器和时基误差校正器

    公开(公告)号：US5298998A

    公开(公告)日：1994-03-29

    申请号：US982373

    申请日：1992-11-25

    申请人： Shigeru Furumiya ,  Yoshinari Takemura

    发明人： Shigeru Furumiya ,  Yoshinari Takemura

    IPC分类号： H04L7/033 ,  H04N5/06 ,  H04N5/932 ,  H04N5/945 ,  H04N5/956 ,  H04N5/04

    CPC分类号： H04N5/932 ,  H04N5/945

    摘要： In a clock generator circuit, a zero hold circuit produces from a fixed clock signal a zero hold clock signal which is in phase with an external sync signal. A phase comparator circuit produces phase difference data indicating the phase difference between the external sync signal and an internal sync signal. A counter cleared by the external sync signal counts pulses of the zero hold clock signal to obtain count data. A memory receiving the phase difference data and the count data as its address input produces the internal sync signal when the count data is smaller than the number of pulses in one cycle of the external sync signal having no time-base variations, and a phase control signal determined by the phase difference data and the count data. A phase shifter shifts the phase of the zero hold clock according to the phase control signal to obtain a modified clock signal synchronized with the external sync signal.

    摘要翻译： 在时钟发生器电路中，零保持电路从固定时钟信号产生与外部同步信号同相的零保持时钟信号。 相位比较器电路产生指示外部同步信号和内部同步信号之间的相位差的相位差数据。 由外部同步信号清零的计数器对零保持时钟信号的脉冲进行计数以获得计数数据。 当计数数据小于没有时基偏差的外部同步信号的一个周期中的脉冲数时，接收相位差数据和计数数据作为其地址输入的存储器产生内部同步信号，并且相位控制 由相位差数据和计数数据确定的信号。 移相器根据相位控制信号移位零保持时钟的相位，以获得与外部同步信号同步的修改的时钟信号。