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123 条记录 (耗时 0.03 秒)

    Disk reproducing apparatus capable of increasing speed of access to disks recorded at constant linear velocity
    1.
    发明授权
    Disk reproducing apparatus capable of increasing speed of access to disks recorded at constant linear velocity 失效
    能够提高以恒定线速度记录的光盘访问速度的磁盘重放装置

    公开(公告)号：US5528574A

    公开(公告)日：1996-06-18

    申请号：US357978

    申请日：1994-12-16

    申请人： Toshifumi Takeuchi ,  Shigeki Inoue ,  Akio Fukushima ,  Takao Arai ,  Yutaka Nagai

    发明人： Toshifumi Takeuchi ,  Shigeki Inoue ,  Akio Fukushima ,  Takao Arai ,  Yutaka Nagai

    IPC分类号： G11B7/005 ,  G11B19/02 ,  G11B19/247 ,  G11B19/28 ,  G11B20/10 ,  G11B7/00

    CPC分类号： G11B19/247 ,  G11B19/02 ,  G11B19/28 ,  G11B20/10 ,  G11B7/005

    摘要： An optical disk reproducing apparatus for reproducing at a high access-speed an optical disk on which data has been recorded at a constant linear velocity (CLV) includes a control circuit for controlling reading of the disk recorded at a CLV to be rotated at a constant angular velocity (CAV), and a processor for changing the frequency of a reference clock to determine the processing timing of the reproduced digital signal in accordance with a transmission speed of the digital information signal picked up from the disk. A motor for driving the disk can be rotated at a constant revolution rate upon access to the disk, and thus it is possible to remove one of the factors for determining the access time in the conventional CLV type reproduction system, or the time for controlling the motor to rotate for a constant linear velocity in accordance with the position of the optical pickup.

    摘要翻译： 一种用于以高速存取速度再现数据以恒定线速度（CLV）记录的光盘的光盘重放装置包括控制电路，该控制电路用于控制在CLV处记录的磁盘的读数以使其以恒定的速度旋转 角速度（CAV）和用于改变参考时钟的频率的处理器，以根据从盘拾取的数字信息信号的传输速度确定再现的数字信号的处理定时。 用于驱动盘的电动机可以在进入盘时以恒定的转速旋转，因此可以去除用于确定常规CLV类型再现系统中的存取时间的因素之一，或者控制该时间 电机根据光学拾取器的位置旋转恒定的线速度。

    PCM signal recording method and apparatus for recording four-channel data to be compatible with two-channel data
    6.
    发明授权
    PCM signal recording method and apparatus for recording four-channel data to be compatible with two-channel data 失效
    用于记录四通道数据以与双通道数据兼容的PCM信号记录方法和装置

    公开(公告)号：US5247396A

    公开(公告)日：1993-09-21

    申请号：US350402

    申请日：1989-05-11

    申请人： Yutaka Nagai ,  Toshifumi Takeuchi

    发明人： Yutaka Nagai ,  Toshifumi Takeuchi

    IPC分类号： G11B20/00 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18

    CPC分类号： G11B20/00992 ,  G11B20/00007 ,  G11B20/10527 ,  G11B20/1208 ,  G11B20/1809 ,  G11B20/1211 ,  G11B2020/10546 ,  G11B2020/1087 ,  G11B2220/90 ,  G11B2220/913

    摘要： A PCM signal recording/reproducing apparatus includes write means for writing data on a recording medium, a data detecting circuit for detecting data from the recording medium, a temporary storage unit for storing temporarily the data to be recorded on the recording medium or the data reproduced from the recording medium, an error correcting circuit for correcting error of the data through cooperation with the storage unit and a switching circuit for changing over a first mode in which first data of two channels each having a sampling frequency of 48 KHz and a quantization bit number of n are recorded/reproduced with a second mode in which second data of two channels each having a sampling frequency of 32 KHz and a quantization bit number of n are recorded/reproduced in accordance with a recording format having a data location for the input data and dummy data location for dummy data to be added to the input data. Upon recording/reproduction of data of four channels including data of main two channels each having a sampling frequency of 32 KHz and a quantization number bits of n and two-sub-channels, recording/reproduction mode is changed over to the second mode in which the main two channel data are disposed at a data location on the recording format through the storage unit, while the input sub-two-channel data are disposed at the location for the dummy data on the recording format through a second block address control circuit.

    摘要翻译： PCM信号记录/再现装置包括用于在记录介质上写入数据的写入装置，用于从记录介质检测数据的数据检测电路，临时存储单元，用于临时存储要记录在记录介质上的数据或再现的数据 从记录介质，通过与存储单元协作来校正数据误差的纠错电路和用于切换第一模式的切换电路，其中每个采样频率为48KHz的两个通道的第一数据和量化位 根据具有用于输入的数据位置的记录格式来记录/再现以第二模式记录/再现n个数，其中每个具有32KHz的采样频率和n的量化位数的两个通道的第二数据被记录/再现 用于将要添加到输入数据的虚拟数据的数据和虚拟数据位置。 在记录/再现包括每个采样频率为32KHz的主要两个信道和n个和两个子信道的量化数位的四个信道的数据时，将记录/再现模式切换到第二模式，其中 主二通道数据通过存储单元设置在记录格式的数据位置，而输入的二通道数据通过第二块地址控制电路设置在记录格式上的伪数据的位置。

    Digital watermark image processing method
    10.
    发明授权
    Digital watermark image processing method 有权
    数字水印图像处理方法

    公开(公告)号：US06584210B1

    公开(公告)日：2003-06-24

    申请号：US09274103

    申请日：1999-03-23

    申请人： Jun′ichi Taguchi ,  Hiroshi Yoshiura ,  Isao Echizen ,  Akira Maeda ,  Takao Arai ,  Toshifumi Takeuchi

    发明人： Jun′ichi Taguchi ,  Hiroshi Yoshiura ,  Isao Echizen ,  Akira Maeda ,  Takao Arai ,  Toshifumi Takeuchi

    IPC分类号： G06K900

    CPC分类号： G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0081 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32235 ,  H04N1/32251

    摘要： An image processing apparatus having an adding unit to add information by changing a data value of image data and a detecting unit to detect the information added to the image data. In a digital watermark image processing method in the image processing apparatus, filter passage image data is formed by performing an image filtering process to original image data, watermark core image data is formed by performing a process to obtain a difference between the filter passage image data and the original image data, change amount image data is formed by performing a process to obtain a value to change the data value of the image data on the basis of the watermark core image data and desired information to be added, and watermark inserted image data is formed by performing a process to add the original image data and the change amount image data.

    摘要翻译： 一种图像处理装置，具有通过改变图像数据的数据值来添加信息的添加单元和检测附加到图像数据的信息的检测单元。 在图像处理装置中的数字水印图像处理方法中，通过对原始图像数据进行图像滤波处理来形成滤波器通过图像数据，通过执行获得滤波器通过图像数据之间的差异的处理来形成水印核心图像数据 并且通过执行基于水印核心图像数据和期望的要添加的信息来获得改变图像数据的数据值的处理来形成原始图像数据，改变量图像数据，以及水印插入图像数据 通过执行添加原始图像数据和变化量​​图像数据的处理来形成。