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    • 1. 发明授权
    • Apparatus for reproducing recorded data comprising interleaved clusters
and cluster linking sectors
    • 用于再现包括交织的簇和簇链接扇区的记录数据的装置
    • US5363362A
    • 1994-11-08
    • US48359
    • 1993-04-15
    • Yasuaki MaedaRyo AndoHideo ObataHideki NagashimaTadao YoshidaKazuhiko FujiieHirotoshi FujisawaHiroshi Mukawa
    • Yasuaki MaedaRyo AndoHideo ObataHideki NagashimaTadao YoshidaKazuhiko FujiieHirotoshi FujisawaHiroshi Mukawa
    • G11B20/12G11B7/013G11B20/00G11B20/10G11B27/00G11B27/10G11B27/30G11B27/34G11B5/09
    • G11B20/00007G11B20/10527G11B27/005G11B27/3027G11B27/34G11B7/013G11B2020/1277G11B2220/2525G11B2220/2545G11B2220/255G11B27/3063
    • There is provided a disc recording apparatus for recording digital data by an optical unit in such a manner that time compressed digital data are arranged into a plurality of clusters at an interval of a predetermined number of sectors, a cluster-linking sector having a length longer than an interleaving length is provided at each linking part of each cluster, and the digital data are subsequently interleaved and recorded on a disc-shaped recording medium so that interleaving at the time of data recording on the cluster-by-cluster basis is within the range of the cluster-linking sector. There is also provided a disc reproducing apparatus for reproducing digital data by an optical unit in which playback data are obtained by reproducing record data recorded on a disc-shaped recording medium in such a manner that a cluster-linking sector longer than an interleaving length is provided in a linking section of each cluster composed of a predetermined number of sectors, the resulting data is interleaved and recorded on the disc-shaped recording medium, and the playback data are deinterleaved and freed or the cluster-linking sectors so as to be stored transiently in a storage unit. Playback data are written in the storage unit when the data volume of playback data stored in the storage unit becomes smaller than a predetermined volume to maintain a readout space in the storage unit which is in excess of the predetermined data volume. In this manner, data may be read out continuously from the storage unit at a predetermined rate without interrupting the reproducing operation at the cluster-linking sector of the data recorded on the medium.
    • 提供了一种用于以光学单元记录数字数据的盘记录装置,使得时间压缩的数字数据以预定数量的扇区的间隔被布置成多个簇,具有长度更长的簇连接扇区 比在每个簇的每个链接部分处提供交织长度,并且数字数据随后被交织并记录在盘形记录介质上,使得在逐个簇的基础上的数据记录时的交织在 集群链接部门的范围。 还提供了一种用于通过光学单元再现数字数据的盘再现装置,其中通过以记录在盘形记录介质上的记录数据来再现数据,使得长于交织长度的簇链接扇区 提供在由预定数量的扇区组成的每个簇的链接部分中,所得到的数据被交织并记录在盘形记录介质上,并且重放数据被去交织和释放,或者聚类链接扇区被存储 暂时在存储单元中。 当存储在存储单元中的重放数据的数据量变得小于预定的音量时,将重放数据写入存储单元,以保持存储单元中超出预定数据量的读出空间。 以这种方式,可以以预定的速率从存储单元以连续的数据读取数据,而不会中断记录在介质上的数据的聚类链接扇区的再现操作。
    • 9. 发明申请
    • Frequency output circuit
    • 频率输出电路
    • US20050237095A1
    • 2005-10-27
    • US11107905
    • 2005-04-18
    • Ryo Ando
    • Ryo Ando
    • H03K19/003G01F15/00G01F15/06H03F3/45H03K17/16H03K19/0175H03K3/017
    • H03F3/45085G01F15/00G01F15/068H03F2200/114H03F2203/45674H03F2203/45686
    • Unwanted electromagnetic waves are eliminated in a frequency output circuit comprising an open-collector output terminal whereby radio noise can be reduced. A frequency output circuit 10 comprises an open-collector transistor Q4 with an open-collector output terminal connected to a pull-up resistor Rf connected to an external power supply Vex. A current limiting circuit 16 limits a current through the output terminal such that a high potential and a low potential of the output waveform of a frequency signal outputted by an output circuit 12 are smoothly switched. The current limiting circuit 16 is formed by a differential pair circuit of transistors Q1 and Q2 each with a resistor provided in the emitter thereof, and a current mirror circuit comprising an open-collector transistor, for example.
    • 在包括集电极开路输出端子的频率输出电路中消除了不需要的电磁波,从而可以降低无线电噪声。 频率输出电路10包括开集电极晶体管Q 4,集电极输出端连接到连接到外部电源Vex的上拉电阻Rf。 限流电路16限制通过输出端子的电流,使得输出电路12输出的频率信号的输出波形的高电位和低电位平滑地切换。 电流限制电路16由晶体管Q 1和Q 2的差分对电路形成,每个晶体管Q 1和Q 2都具有设置在其发射极中的电阻器,以及包括集电极晶体管的电流镜电路。
    • 10. 发明申请
    • Defect-signal generating circuit and optical disk reproducing device having the same
    • 缺陷信号发生电路和具有该缺陷信号产生电路的光盘再现装置
    • US20050185550A1
    • 2005-08-25
    • US11057339
    • 2005-02-11
    • Takeshi YamaguchiRyo Ando
    • Takeshi YamaguchiRyo Ando
    • G11B7/005G11B20/10
    • G11B20/10203
    • An optical disk reproducing device has a defect-signal generating circuit including a peak-holding-signal generating circuit for generating a peak-hold signal based on an RF signal read from a recording medium, an intermediate-signal generating circuit for generating an intermediate signal based on the peak-hold signal, a signal-level adjusting circuit for generating a threshold signal based on the intermediate signal, a threshold-signal adjusting circuit for adjusting the level of the threshold signal, and a comparator for generating a defect signal based on the peak-hold signal and threshold signal. The threshold-signal adjusting circuit includes at least one of: a first adjusting circuit for raising the threshold signal in the event the peak-hold signal falls below the threshold signal due to the peak-hold signal and the threshold signal being reversed; and a second adjusting circuit for lowering the threshold signal in the event the peak-hold signal exceeds the threshold signal, due to the reversal.
    • 光盘再现装置具有缺陷信号发生电路,该缺陷信号产生电路包括:峰值保持信号产生电路,用于根据从记录介质读取的RF信号产生峰值保持信号;产生中间信号的中间信号产生电路 基于所述峰值保持信号,生成基于所述中间信号的阈值信号的信号电平调整电路,用于调整所述阈值信号的电平的阈值信号调整电路,以及基于 峰值保持信号和阈值信号。 阈值信号调整电路包括以下至少一个:第一调整电路,用于在峰值保持信号由于峰值保持信号和阈值信号反相而在阈值信号下降的情况下提升阈值信号; 以及第二调整电路,用于在峰值保持信号超过阈值信号的情况下,由于反转而降低阈值信号。