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    • 45. 发明授权
    • Information recording/reproducing apparatus for writing on and reading
from a rewritable optical disk have tracks divided into a plurality of
sectors
    • 用于在可重写光盘上写入和读取的信息记录/再现装置具有分成多个扇区的轨道
    • US5214626A
    • 1993-05-25
    • US753886
    • 1991-09-03
    • Isac SatohYoshihisa FukushimaYuji TakagiYasushi AzumataniHiroshi Hamasaka
    • Isac SatohYoshihisa FukushimaYuji TakagiYasushi AzumataniHiroshi Hamasaka
    • G11B7/085G11B7/0045G11B19/02G11B20/10
    • G11B19/02G11B20/10527G11B7/0045
    • An information recording/reproducing apparatus is suitable for writing on and reading from a rewritable optical disk signals having a time-based continuity attribute such as video signals and audio signals. The optical disk has a plurality of tracks each divided into sectors. The apparatus has a RAM for storing data externally supplied, and first and second address counters for generating addresses for writing into and reading from the RAM, respectively. The apparatus also has a track-jump detector circuit for detecting the occurrence of a track jump of an optical head while the head is writing on the disk. When a track jump is detected, a laser driving circuit stops actuating the head such that the writing operation is halted, and a track-jump address latch circuit stores an address of a track-jump occurring sector. Based on the address stored in the track-jump address latch circuit and a track address where the head is actually is, the head is returned to the sector where the track jump occurred. Then, under control of a CPU, the second address counter again generates addresses at which the RAM stores data which should have been written on the track-jump occurring sector from its leading position. Thus, even if a track jump occurs, information having a time-based continuity attribute is recorded without any data loss.
    • 信息记录/再现装置适用于写入和读取具有时间连续性属性(诸如视频信号和音频信号)的可重写光盘信号。 光盘具有分成扇区的多个轨迹。 该装置具有用于存储外部提供的数据的RAM,以及分别用于产生写入RAM和从RAM读取的地址的第一和第二地址计数器。 该装置还具有轨迹跳跃检测器电路,用于在磁头写入磁盘时检测光学头的轨道跳跃的发生。 当检测到磁道跳跃时,激光驱动电路停止启动磁头,使得写入操作停止,并且轨道跳转地址锁存电路存储轨道跳跃发生扇区的地址。 基于存储在轨道跳转地址锁存电路中的地址和磁头实际上的轨道地址,头部返回到发生轨道跳跃的扇区。 然后,在CPU的控制下,第二地址计数器再次产生地址,RAM将存储应该从其引导位置写入轨道跳跃发生扇区的数据。 因此,即使发生轨道跳跃,记录具有基于时间的连续性属性的信息,而没有任何数据丢失。
    • 50. 发明授权
    • Information device for providing fast data transfer with minimum overhead
    • 信息设备,以最小的开销提供快速的数据传输
    • US5566350A
    • 1996-10-15
    • US400284
    • 1995-03-03
    • Yuji TakagiIsao SatohYoshihisa FukushimaYasushi AzumataniHiroshi Hamasaka
    • Yuji TakagiIsao SatohYoshihisa FukushimaYasushi AzumataniHiroshi Hamasaka
    • G06F13/38G06F13/42
    • G06F13/4239
    • An information device which ensures fast data transfer between a RAM and an I/O channel, between an I/O channel and another I/O channel, or between a RAM and another RAM: comprises address decoder circuit which allows the CPU to gain simultaneous access to both the RAM and the I/O channel when the CPU accesses a data transfer area mapped for data transfer, and an inverter which assures that both the RAM and the I/O channel operate in a mutually opposite manner, either in one mode in which the RAM works in a read operation with the I/O channel in a write operation or vice versa in response to the access request of read/write from the CPU. By assuring that both the RAM and the I/O channel operate in a mutually opposite manner, in response to an access from the CPU, data transfer between the RAM and the I/O channel is completed in a single access from the CPU; thus, fast data transfer is achieved.
    • 确保RAM和I / O通道之间,I / O通道和另一个I / O通道之间或RAM与另一RAM之间的快速数据传输的信息设备包括地址解码器电路,其允许CPU同时获得 当CPU访问映射用于数据传输的数据传输区域时,访问RAM和I / O通道;以及逆变器,其确保RAM和I / O通道都以相互相反的方式工作,或者以一种模式 其中RAM响应于来自CPU的读/写访问请求,在写操作中以I / O通道进行读操作,反之亦然。 通过确保RAM和I / O通道都以相互相反的方式操作,响应于来自CPU的访问,RAM和I / O通道之间的数据传输在来自CPU的单个访问中完成; 从而实现快速的数据传输。