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    • 6. 发明授权
    • Optical disk recording device using two modulated laser beams for
recording information data
    • 使用两个调制激光束记录信息数据的光盘记录装置
    • US5530688A
    • 1996-06-25
    • US332234
    • 1994-10-31
    • Jerry E. Hurst, Jr.Kurt A. RubinYenyu Hsieh
    • Jerry E. Hurst, Jr.Kurt A. RubinYenyu Hsieh
    • G11B7/0045G11B7/125G11B11/105G11B7/00
    • G11B7/126G11B11/1053G11B7/00454G11B7/127G11B7/0045
    • An optical disk data storage system uses two lasers to write data on the disk, preferably using pulse width modulation (PWM). The lasers direct two independently controllable laser beams to the disk to form two spots that are spaced apart a fixed distance along the data track. Each laser is independently controlled by a modulator that causes the laser to emit the laser beam in a highly pulsed manner. The two laser beams can be simultaneously and independently pulsed along a single track and each beam may be pulsed on any given write clock period and at any of several different power levels. The pulsed lasers write spots of substantially the same size on the disk. The PWM run lengths are recorded on the disk as marks comprising either a single isolated spot or a series of contiguous or overlapping spots. The pulsing of the two lasers is synchronously interleaved so that either adjacent marks (mark-interleaved writing) or adjacent mark edges (edge-interleaved writing) are alternately written by the two lasers. In this manner, an amount of time elapses between the writing of successive marks or mark edges, thereby significantly reducing the effect of thermal buildup by allowing time for the data layer in the optical disk to cool.
    • 光盘数据存储系统使用两个激光器来在盘上写数据,优选地使用脉宽调制(PWM)。 激光器将两个可独立控制的激光束引导到盘,以形成沿着数据轨道间隔开固定距离的两个点。 每个激光器由调制器独立控制,该调制器使得激光以高度脉冲的方式发射激光束。 两个激光束可以沿着单个轨道同时且独立地脉冲,并且每个波束可以在任何给定的写时钟周期和几个不同功率电平中的任一个处被脉冲。 脉冲激光器在盘上写入基本上相同尺寸的光斑。 PWM运行长度作为标记记录在磁盘上,标记包括单个孤立点或一系列连续或重叠的点。 两个激光器的脉冲同步交错,使得两个激光器交替地写入相邻标记(标记交错写入)或相邻标记边缘(边缘交错写入)。 以这种方式,在连续标记或标记边缘的写入之间经过一段时间,从而通过允许光盘中的数据层的时间冷却来显着减少热积累的影响。
    • 9. 发明授权
    • Viterbi detector with partial erasure compensation for read channels
    • 维特比检测器,对读通道进行部分擦除补偿
    • US06313963B1
    • 2001-11-06
    • US09385190
    • 1999-08-30
    • Yenyu Hsieh
    • Yenyu Hsieh
    • G11B509
    • G11B20/10055G11B5/012G11B5/09G11B20/10009G11B20/10037G11B20/10296
    • A system and method for partial erasure compensation for a read channel is disclosed. The method comprises receiving a signal at a first state, the first state having a branch extending to each of a plurality of possible next states, each branch corresponding to a target value, determining a partial erasure compensation for each of the target values corresponding to a branch between the first state and each of the possible next states based upon the first state and each of the possible next states, the partial erasure compensation being a function of an amplitude reduce by partial erasure, and modifying the target value with the determined partial erasure compensation.
    • 公开了一种用于读通道的部分擦除补偿的系统和方法。 该方法包括在第一状态下接收信号,第一状态具有延伸到多个可能的下一状态中的每一个的分支,每个分支对应于目标值,确定对应于一个目标值的每个目标值的部分擦除补偿 基于第一状态和每个可能的下一状态在第一状态和每个可能的下一状态之间分支,部分擦除补偿是通过部分擦除减小幅度的函数,并且利用所确定的部分擦除来修改目标值 补偿。