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    • 12. 发明授权
    • Apparatus for multi-channel dividing, recording and reproducing a video
signal
    • 多通道分配,记录和再现视频信号的装置
    • US5162922A
    • 1992-11-10
    • US596329
    • 1990-10-15
    • Yoshinari TakemuraShigeru FurumiyaHiromu Kitaura
    • Yoshinari TakemuraShigeru FurumiyaHiromu Kitaura
    • H04N5/76H04N5/04H04N5/85H04N5/92H04N7/015H04N9/797H04N9/877
    • H04N9/7973H04N5/85H04N9/877
    • A video disc is produced from a master video disc which has recorded therein a video signal including a synchronous signals occurring periodically and divided into plural channels by the cycle of the synchronous signals. The plural channel signals are recorded on a group of plural tracks, respectively. In the case of reproducing the video disc, the plural channel signals are reproduced from the group of plural tracks, respectively. Synchronous signals are detected from the reproduced signals. The reproduced channel signals in a period of the synchronous signal are stored in plural memories based on the synchronous signals detected. The stored plural channel signals are continuously reproduced by successively reading from the memories of channels by switching at synchronous intervals. The signal bandwidth of the channels becomes 1/n of the original video signal by recording and reproducing the video signal by dividing it into plural channels(n channels) in such manner. Therefore, even when the shortest recording wavelength is the same, the linear velocity is reduced by 1/n.
    • 从主视频盘产生视频盘,其中记录有包含周期性发生的同步信号的视频信号,并通过同步信号的周期被划分为多个信道。 多个信道信号分别记录在一组多个磁道上。 在再现视频盘的情况下,分别从多个磁道组再现多个声道信号。 从再现信号中检测同步信号。 基于检测到的同步信号,将同步信号的周期中的再生信道信号存储在多个存储器中。 所存储的多个信道信号通过以同步间隔切换从信道的存储器连续地读出来连续再现。 通过以这种方式将视频信号分成多个信道(n个信道)来记录和再现视频信号,信道的信号带宽变为原始视频信号的1 / n。 因此,即使最短记录波长相同,线速度也减少1 / n。
    • 15. 发明授权
    • Disc reproducing method and apparatus with multiple heads
    • 具有多个磁头的磁盘重放方法和装置
    • US5488593A
    • 1996-01-30
    • US165055
    • 1993-12-10
    • Shigeru FurumiyaYoshinari Takemura
    • Shigeru FurumiyaYoshinari Takemura
    • G11B5/09G11B7/00G11B7/005G11B7/14G11B19/28G11B20/10G11B20/12G11B20/14
    • G11B20/1258G11B20/10
    • A disc reproducing apparatus for reproducing data stored on plural disc surfaces at a constant linear density comprises: plural heads for reproducing the data on the plural disc surfaces at the same time respectively; a controller for controlling positions of the heads such that a total data rate of data reproduced form the plural heads is constant, each of the disc surfaces being divided into N circumference zones; N signal processing circuits, having N processing speeds corresponding to N data rates corresponding to the N circumference zones, for processing the reproduced data respectively; a switch for supplying the reproduced data to the N signal processing circuits such that data reproduced by each of the plural heads is supplied to any of the N signal processing circuits suitable for the data rate of the supplied data thereto; and a combining circuit for combining the processed data signals from the N signal processing circuits into a combined serial data signal of which data rate corresponds to the total of data rates. A disc reproducing method of reproducing data stored on a plurality of disc surfaces at a constant linear density using N signal processing circuits and the switch is also disclosed.
    • 用于以恒定线密度再现存储在多个盘表面上的数据的盘再现装置包括:分别同时再现多个盘表面上的数据的多个头; 控制器,用于控制头部的位置,使得从多个头部再现的数据的总数据速率是恒定的,每个盘表面被分成N个圆周区域; N个信号处理电路,具有对应于N个周边区域的N个数据速率的N个处理速度,分别用于处理再现数据; 用于将再现数据提供给N个信号处理电路的开关,使得由多个磁头中的每一个重放的数据被提供给适合于所提供数据的数据速率的N个信号处理电路中的任何一个; 以及组合电路,用于将来自N个信号处理电路的经处理的数据信号组合成数据速率对应于数据速率总和的组合串行数据信号。 还公开了使用N个信号处理电路和开关以恒定的线密度再现存储在多个盘表面上的数据的盘再现方法。
    • 16. 发明授权
    • Synchronous signal generator for the muse signal
    • 同步信号发生器用于muse信号
    • US5148276A
    • 1992-09-15
    • US620194
    • 1990-11-30
    • Shigeru FurumiyaYoshinari TakemuraHiromu Kitaura
    • Shigeru FurumiyaYoshinari TakemuraHiromu Kitaura
    • H04N5/08H03L7/087H03L7/091H03L7/199H04L7/04H04N5/10H04N7/015
    • H03L7/199H03L7/087H04N5/10H03L7/091
    • A synchronous signal generator for use with the MUSE signal in the MUSE system which is a high definition television systems. A PLL circuit including a phase comparator and a voltage-controlled oscillator and a counter, is used to generate a system clock synchronized with an external clock. A frame synchronizing signal detected through a frame sychronization detection circuit from an inputted digital MUSE signal frame-resets the counter through a window circuit. The frame synchronization is established at an accuracy of a set range of the window circuit. Also, in this case, if the sychronization deviates on a clock by clock basis, a sampling phase error from a phase error computing circuit is monitored by a comparator circuit so that a deviation in the synchronization can be detected. When the synchronization deviates, by horizonally resetting the counter, the clock synchronization can be established. By effecting the three steps noted above, the synchronous signal generation for the digital MUSE signal can be properly achieved. Also, by combining an arrangement noted above with a conventional synchronous signal for an analog MUSE signal, a synchronous signal generator for both a digital MUSE signal and an analog MUSE signal can be provided.
    • 同步信号发生器,用于MUSE系统中的MUSE信号,该系统是高分辨率电视系统。 包括相位比较器和压控振荡器以及计数器的PLL电路用于产生与外部时钟同步的系统时钟。 通过帧同步检测电路从输入的数字MUSE信号帧检测的帧同步信号通过窗口电路复位计数器。 在窗口电路的设定范围的精度下建立帧同步。 此外,在这种情况下,如果同步在时钟上基于时钟偏移,则由比较器电路监视来自相位误差计算电路的采样相位误差,从而可以检测到同步偏差。 当同步偏离时,通过水平重置计数器,可以建立时钟同步。 通过进行上述三个步骤,可以适当地实现数字MUSE信号的同步信号产生。 此外,通过将上述装置与用于模拟MUSE信号的常规同步信号组合,可以提供用于数字MUSE信号和模拟MUSE信号的同步信号发生器。
    • 17. 发明授权
    • Optical information recording/reproducing method and optical information recording/reproducing apparatus
    • 光信息记录/再现方法和光信息记录/再现装置
    • US06510116B1
    • 2003-01-21
    • US09493102
    • 2000-01-28
    • Naoyasu MiyagawaTakashi IshidaJunichi MinaminoKenji KoishiShigeru Furumiya
    • Naoyasu MiyagawaTakashi IshidaJunichi MinaminoKenji KoishiShigeru Furumiya
    • G11B509
    • G11B7/00456G11B7/00736G11B7/24085G11B20/10009G11B20/10481G11B2020/1275G11B2220/2537
    • When data is reproduced by an apparatus which is different from an apparatus used for recording the data, the fluctuation of edge positions of the reproducing data increases, making reproduction incompatible, and the present invention solves this problem. The present invention comprises reproducing learning means 13 and 24 for switching a frequency characteristic of the reproducing system, which detects the changes of the local optical constant, to a predetermined frequency characteristic, and recording learning means 20 for correcting the start edge or end edge position of the recording pulse for each combination of length of a mark block and length of the preceding or subsequent space, so that the edge position of the binarized reproducing data comes to a desired position, and since the frequency characteristic of the reproducing system is unified before learning the edge shift amount caused by the thermal interference between marks, the length of the recorded marks and spaces can always be constant, which improves the reproducing compatibility among reproducing apparatuses.
    • 当通过与用于记录数据的装置不同的装置再现数据时,再现数据的边缘位置的波动增加,使得再现不兼容,并且本发明解决了这个问题。 本发明包括用于将检测局部光学常数的变化的再现系统的频率特性切换到预定频率特性的再现学习装置13和24,以及用于校正起始边缘或结束边缘位置的记录学习装置20 对于标记块的长度和前一或后续空格的长度的每个组合的记录脉冲,使得二值化再现数据的边缘位置到达期望位置,并且由于再现系统的频率特性在 学习由标记之间的热干扰引起的边缘偏移量,记录的标记和间隔的长度总是恒定的,这提高了再现装置之间的再现兼容性。