会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明授权
    • Light modulation method for forming a mark in magneto-optical recording
system
    • 用于在磁光记录系统中形成标记的光调制方法
    • US5457666A
    • 1995-10-10
    • US114062
    • 1993-08-31
    • Tsuyoshi TodaHiroshi IdeFumiyoshi KirinoTakeshi MaedaHiroyuki TsuchinagaToshimitsu KakuSeiichi MitaKazuo Shigematsu
    • Tsuyoshi TodaHiroshi IdeFumiyoshi KirinoTakeshi MaedaHiroyuki TsuchinagaToshimitsu KakuSeiichi MitaKazuo Shigematsu
    • G11B7/00G11B7/0045G11B7/0055G11B7/006G11B7/125G11B11/10G11B11/105G11B7/24
    • G11B7/126G11B11/10506G11B11/1053G11B7/0045G11B7/006
    • A magneto-optical disk recording control method using the mark length recording method wherein the marks and gap regions between marks are recorded on the surface of the disk by maintaining a constant temperature distribution during the recording. The laser is driven to a non-recording level in gap regions between marks that exceed a base recording level used for reproduction of the marks. When a mark is recorded, the laser power is increased to a recording power level and after the mark has been recorded, the laser power level is reduced to the base power level, followed by being raised to the gap recording level. Control of the laser is performed by superposing a plurality of pulse trains that are synchronized with respect to a clock having a cycle T. The pulse trains are derived from the code train to be recorded and have pulses with a duration that is an integral multiple of (1/2)T. If the pulse width of the recording code train exceeds 2T, then the laser is controlled to reach a first power level in accordance with pulses of a first pulse train, be reduced to the gap recording level and then raised to a second power level in accordance with a second recording pulse train to maintain the temperature distribution constant during the recording of the mark. For the recording of longer marks, the laser is controlled to vary between the second power level and the gap recording level.
    • 一种使用标记长度记录方法的磁光盘记录控制方法,其中通过在记录期间保持恒定的温度分布将标记之间的标记和间隙区域记录在盘的表面上。 在超过用于再现标记的基本记录水平的标记之间的间隙区域中激光被驱动到非记录水平。 当记录标记时,激光功率增加到记录功率水平,并且在记录标记之后,激光功率水平降低到基本功率水平,然后升高到间隙记录水平。 通过叠加相对于具有周期T的时钟同步的多个脉冲串来执行激光的控制。脉冲序列是从要被记录的代码序列导出的,具有持续时间为整数倍的脉冲 (1/2)T。 如果记录代码串的脉冲宽度超过2T,则根据第一脉冲序列的脉冲将激光器控制到达到第一功率电平,减小到间隙记录电平,然后依次升高到第二功率电平 具有第二记录脉冲串,以在记录记录期间保持温度分布恒定。 为了记录更长的标记,激光器被控制在第二功率电平和间隙记录电平之间变化。
    • 8. 发明授权
    • Information recording method and optical disk apparatus using same
    • 信息记录方法和使用其的光盘装置
    • US5333126A
    • 1994-07-26
    • US16897
    • 1993-02-12
    • Yasushi FukudaHiroshi IdeAtsushi SaitoTakeshi MaedaFumiyoshi KirinoTsuyoshi Toda
    • Yasushi FukudaHiroshi IdeAtsushi SaitoTakeshi MaedaFumiyoshi KirinoTsuyoshi Toda
    • G11B7/0045G11B20/12G11B20/14G11B27/30G11B5/76G11B5/09
    • G11B20/1217G11B20/1426G11B27/3027G11B7/0045G11B2220/20
    • When record marks are recorded on a recording medium while making a code symbol "1" of data by obtained coding write information according to a coding system having no DC free property correspond to every edge of the record marks, the recording is effected while inserting resynchronizing signals into the write information with a constant interval. For the resynchronizing signal either one selected between a first resynchronizing code pattern, in which the number of symbols "1" contained therein is even, and a second resynchronizing code pattern, in which the number of symbols "1" is odd, so that an accumulated charge obtained from the run length of the coded data approaches zero is used. Each of the first and the second resynchronizing code pattern contains at least a specified pattern, which doesn't meet the coding rule. The selection is effected by adding a run length switching code to the resynchronizing signal and by switching it to "0" or "1" depending on an output of a run length measuring circuit and a run length judging circuit. In this way it is possible to suppress fluctuations in the level of a reproduced signal obtained from the record marks recorded on the recording medium and to realize a stable data detection by using the original waveform detection method, by which the reproduced signal is converted into a binary signal by using a suitable slice level.
    • 当记录标记被记录在记录介质上时,通过根据不具有直流自由特性的编码系统获得的编码写入信息,使数据的代码符号“1”对应于记录标记的每个边缘,记录是在插入再同步 以恒定的间隔将信号写入信息。 对于再同步信号,其中在其中包含在其中的符号“1”的数量为偶数的第一重新同步码模式和符号“1”的数量为奇数的第二再同步码模式之间选择,使得 使用从编码数据的游程长度获得的累积电荷接近零。 第一和第二再同步代码模式中的每一个至少包含指定的模式,其不符合编码规则。 通过将游程长度切换码添加到重新同步信号并根据游程长度测量电路和游程长度判断电路的输出将其切换为“0”或“1”来进行选择。 以这种方式,可以抑制从记录在记录介质上的记录标记获得的再现信号的电平的波动,并且通过使用原始波形检测方法来实现稳定的数据检测,通过该原始波形检测方法将再现信号转换成 二进制信号通过使用合适的限幅电平。