公开(公告)号：US5706385A

公开(公告)日：1998-01-06

申请号：US351649

申请日：1994-12-07

申请人： Hideaki Suzuki ,  Susumu Yoshida ,  Nobutaka Amada ,  Toshifumi Takeuchi ,  Takao Arai

发明人： Hideaki Suzuki ,  Susumu Yoshida ,  Nobutaka Amada ,  Toshifumi Takeuchi ,  Takao Arai

IPC分类号： H04N5/782 ,  H04N5/7826 ,  H04N5/783 ,  H04N5/913 ,  H04N9/79 ,  H04N9/797 ,  H04N9/802 ,  H04N9/804 ,  H04N9/83 ,  H04N9/87 ,  H04N15/226 ,  H04N5/11 ,  H04N9/99

CPC分类号： H04N5/78263 ,  H04N9/7973 ,  H04N9/802 ,  H04N9/8042 ,  H04N9/83 ,  H04N2005/91364 ,  H04N5/78213 ,  H04N5/783 ,  H04N5/913 ,  H04N9/7904 ,  H04N9/87

摘要： A rotary head type magnetic recording and reproducing apparatus for recording and reproducing an analog wide-band video signal, audio signal and compressed digital signal on the same recording medium. The modulated analog wide-band video signal or the narrow-band-converted compressed digital signal is recorded on two video tracks adjacent to each other on a magnetic tape by magnetic heads on a rotary drum.

摘要翻译： 用于在相同记录介质上记录和再现模拟宽带视频信号，音频信号和压缩数字信号的旋转磁头式磁记录和再现装置。 经调制的模拟宽带视频信号或窄带转换的压缩数字信号通过旋转磁鼓上的磁头在磁带上彼此相邻的两个视频轨道上记录。

公开(公告)号：US06219320B1

公开(公告)日：2001-04-17

申请号：US09048987

申请日：1998-03-27

申请人： Nobutaka Amada ,  Toshifumi Takeuchi ,  Takao Arai

发明人： Nobutaka Amada ,  Toshifumi Takeuchi ,  Takao Arai

IPC分类号： G11B700

CPC分类号： G11B20/10046 ,  G11B7/005 ,  G11B20/10009 ,  G11B20/10527 ,  G11B20/1426

摘要： An optical disk medium to which a digital information signal modulated by using a run length limited code in which the minimum run length is d is recorded. The digital information signal is recorded at a bit rate Fb satisfying the equation Fb=K·d·Fm, wherein a cut-off frequency in frequency response of said optical disk medium is Fm, and a value of a coefficient K regarding recording density is larger than 1.

摘要翻译： 记录通过使用其中最小游程长度为d的游程长度受限码调制的数字信息信号的光盘介质。 以符合式Fb = KdFm的比特率Fb记录数字信息信号，其中所述光盘介质的频率响应中的截止频率为Fm，关于记录密度的系数K的值大于1 。

公开(公告)号：US5602816A

公开(公告)日：1997-02-11

申请号：US517584

申请日：1995-08-22

申请人： Nobutaka Amada ,  Toshifumi Takeuchi ,  Takao Arai

发明人： Nobutaka Amada ,  Toshifumi Takeuchi ,  Takao Arai

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B20/10 ,  G11B20/14 ,  G11B27/36

CPC分类号： G11B20/10046 ,  G11B20/10009 ,  G11B20/10527 ,  G11B20/1426 ,  G11B7/005

摘要： An object of the present invention is to increase the recording density of digital information signal in a recording medium without changing parameters of the recording medium and a RLL code. To accomplish the object, the present invention has a frequency response of the equalizer set so that an overall transmission frequency characteristic H(f) of the RLL coder, the recording medium, and the equalizer to an impulse becomes the one given by an equation below ##EQU1## where Fm denotes a cut-off frequency of the recording medium.

摘要翻译： 本发明的目的是提高记录介质中的数字信息信号的记录密度，而不改变记录介质的参数和RLL代码。 为了实现该目的，本发明具有均衡器组的频率响应，使得RLL编码器，记录介质和与脉冲的均衡器的总体传输频率特性H（f）成为由下面的等式给出的 其中Fm表示记录介质的截止频率。

公开(公告)号：US5414567A

公开(公告)日：1995-05-09

申请号：US625822

申请日：1990-12-11

申请人： Nobutaka Amada ,  Toshifumi Takeuchi ,  Akira Abeta ,  Takao Arai ,  Kouei Usuda

发明人： Nobutaka Amada ,  Toshifumi Takeuchi ,  Akira Abeta ,  Takao Arai ,  Kouei Usuda

IPC分类号： G11B5/02 ,  G11B20/10 ,  H04N5/782 ,  H04N9/802 ,  H04N9/835 ,  H04N5/78

CPC分类号： H04N9/835 ,  G11B20/10 ,  H04N5/78213 ,  H04N9/802

摘要： A magnetic recording method and apparatus which performs a quadrature phase shift keying operation on a digital information signal, superimposes a high frequency bias signal on the performed signal, records the resulting signal into a deep portion of a magnetic layer of a magnetic tape with a first rotational head, and records a video signal in a surface portion of the magnetic layer above a track formed by the former recording, with a second rotational head which is different in azimuth angle from the first rotational head, the frequency of the high frequency bias signal being set to a value which is about four times as high as the carrier frequency of the quadrature phase shift keyed digital information signal, thereby eliminating a 5th-order distortion component due to cross modulation of the high frequency bias signal and the carrier frequency.

摘要翻译： 对数字信息信号执行正交相移键控操作的磁记录方法和装置，在所执行的信号上叠加高频偏置信号，将所得到的信号记录在磁带的磁性层的深部，第一 旋转头，并且利用与第一旋转头的方位角不同的第二旋转头将磁性层的表面部分中的视频信号记录在由前一记录形成的轨道上，高频偏置信号的频率 被设置为正交相移键控数字信息信号的载波频率的约四倍的值，从而消除由于高频偏置信号和载波频率的交叉调制引起的5阶失真分量。

公开(公告)号：US5777966A

公开(公告)日：1998-07-07

申请号：US848560

申请日：1997-04-28

申请人： Nobutaka Amada ,  Toshifumi Takeuchi ,  Takao Arai

发明人： Nobutaka Amada ,  Toshifumi Takeuchi ,  Takao Arai

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B20/10 ,  G11B20/14

CPC分类号： G11B20/10046 ,  G11B20/10009 ,  G11B20/10527 ,  G11B20/1426 ,  G11B7/005

摘要： An object of the present invention is to increase the recording density of digital information signal in a recording medium without changing parameters of the recording medium and a RLL code. To accomplish the object, the present invention has a frequency response of the equalizer set so that an overall transmission frequency characteristic H(f) of the RLL coder, the recording medium, and the equalizer to an impulse becomes the one given by an equation below ##EQU1## where Fm denotes a cut-off frequency of the recording medium.

摘要翻译： 本发明的目的是提高记录介质中的数字信息信号的记录密度，而不改变记录介质的参数和RLL代码。 为了实现该目的，本发明具有均衡器组的频率响应，使得RLL编码器，记录介质和与脉冲的均衡器的总体传输频率特性H（f）成为由下面的等式给出的 其中Fm表示记录介质的截止频率。

公开(公告)号：US5650989A

公开(公告)日：1997-07-22

申请号：US692091

申请日：1996-08-07

申请人： Nobutaka Amada ,  Toshifumi Takeuchi ,  Takao Arai

发明人： Nobutaka Amada ,  Toshifumi Takeuchi ,  Takao Arai

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B20/10 ,  G11B20/14

CPC分类号： G11B20/10046 ,  G11B20/10009 ,  G11B20/10527 ,  G11B20/1426 ,  G11B7/005

摘要： An object of the present invention is to increase the recording density of digital information signal in a recording medium without changing parameters of the recording medium and a RLL code. To accomplish the object, the present invention has a frequency response of the equalizer set so that an overall transmission frequency characteristic H(f) of the RLL coder, the recording medium, and the equalizer to an impulse becomes the one given by an equation below ##EQU1## where Fm denotes a cut-off frequency of the recording medium.

摘要翻译： 本发明的目的是提高记录介质中的数字信息信号的记录密度，而不改变记录介质的参数和RLL代码。 为了实现该目的，本发明具有均衡器组的频率响应，使得RLL编码器，记录介质和与脉冲的均衡器的总体传输频率特性H（f）成为由下面的等式给出的 其中Fm表示记录介质的截止频率。

公开(公告)号：US08311219B2

公开(公告)日：2012-11-13

申请号：US13307110

申请日：2011-11-30

申请人： Osamu Kawamae ,  Toshifumi Takeuchi ,  Hiroyuki Kimura ,  Takao Arai ,  Hiroshi Yoshiura

发明人： Osamu Kawamae ,  Toshifumi Takeuchi ,  Hiroyuki Kimura ,  Takao Arai ,  Hiroshi Yoshiura

IPC分类号： H04L9/16

CPC分类号： H04N21/4367 ,  G11B20/00086 ,  G11B20/00188 ,  G11B20/00195 ,  G11B20/0021 ,  G11B20/00224 ,  G11B20/00304 ,  G11B20/00449 ,  G11B20/00739 ,  G11B20/00753 ,  G11B20/00768 ,  G11B20/00884 ,  H04K1/00 ,  H04L9/32 ,  H04L2209/603 ,  H04N5/765 ,  H04N5/77 ,  H04N5/775 ,  H04N5/781 ,  H04N5/85 ,  H04N5/913 ,  H04N9/8042 ,  H04N21/4405 ,  H04N2005/91328 ,  H04N2005/91335 ,  H04N2005/91364

摘要： An authentication method for use in sending/receiving data between a coded data output apparatus for outputting coded data having a water mark, and a recording apparatus for recording data onto a recording medium, the method including: deciding a type of the recording medium used by the recording apparatus; based on a result of the deciding, selecting, from a plurality of authentication methods, an authentication method corresponding to the type of the recording medium, and conducting authentication between the coded data output apparatus and the recording apparatus, using the authentication method; sending/receiving data between the coded data output apparatus and the recording apparatus after conducting the authentication; and in a case where the coded data has the water mark, detecting the water mark by the coded data output apparatus, wherein the data exchanged between the coded data output apparatus and the recording apparatus is scrambled by a scrambling method corresponding to the type the recording medium.

摘要翻译： 一种用于在用于输出具有水印的编码数据的编码数据输出装置和用于将数据记录到记录介质上的记录装置之间发送/接收数据的认证方法，所述方法包括：确定使用的记录介质的类型， 记录装置; 基于从多种认证方法中选择与记录介质的种类相对应的认证方法，使用认证方法进行编码数据输出装置与记录装置之间的认证的结果; 在进行认证之后，在编码数据输出装置与记录装置之间发送/接收数据; 并且在编码数据具有水印的情况下，通过编码数据输出装置检测水印，其中在编码数据输出装置和记录装置之间交换的数据通过与记录类型相对应的加扰方法进行加扰 中。

公开(公告)号：US07779256B2

公开(公告)日：2010-08-17

申请号：US11968883

申请日：2008-01-03

申请人： Osamu Kawamae ,  Toshifumi Takeuchi ,  Hiroyuki Kimura ,  Takao Arai ,  Hiroshi Yoshiura

发明人： Osamu Kawamae ,  Toshifumi Takeuchi ,  Hiroyuki Kimura ,  Takao Arai ,  Hiroshi Yoshiura

IPC分类号： H04L9/16

CPC分类号： H04N21/4367 ,  G11B20/00086 ,  G11B20/00188 ,  G11B20/00195 ,  G11B20/0021 ,  G11B20/00224 ,  G11B20/00304 ,  G11B20/00449 ,  G11B20/00739 ,  G11B20/00753 ,  G11B20/00768 ,  G11B20/00884 ,  H04K1/00 ,  H04L9/32 ,  H04L2209/603 ,  H04N5/765 ,  H04N5/77 ,  H04N5/775 ,  H04N5/781 ,  H04N5/85 ,  H04N5/913 ,  H04N9/8042 ,  H04N21/4405 ,  H04N2005/91328 ,  H04N2005/91335 ,  H04N2005/91364

摘要： A data reproducing method for a plurality of devices, for sending and receiving data by authenticating the plurality of devices with each other, said data reproducing method including: selecting, from a plurality of descrambling methods, a scrambling method corresponding to a type of said data, executing authentication by an authenticating method corresponding to the selected descrambling method, where the authenticating method is selected from a plurality of authenticating methods, and reproducing said data.

摘要翻译： 一种用于多个设备的数据再现方法，用于通过彼此认证多个设备来发送和接收数据，所述数据再现方法包括：从多个解扰方法中选择与所述数据类型相对应的加扰方法 通过与选择的解扰方法相对应的认证方法执行认证，其中从多种认证方法中选择认证方法，并再现所述数据。

公开(公告)号：USRE40312E1

公开(公告)日：2008-05-13

申请号：US10785864

申请日：2004-02-25

申请人： Tadashi Kojima ,  Koichi Hirayama ,  Hisashi Yamada ,  Yoshiaki Moriyama ,  Fumihiko Yokogawa ,  Takao Arai ,  Toshifumi Takeuchi ,  Shinichi Tanaka ,  Akira Kurahashi ,  Toshiyuki Shimada

发明人： Tadashi Kojima ,  Koichi Hirayama ,  Hisashi Yamada ,  Yoshiaki Moriyama ,  Fumihiko Yokogawa ,  Takao Arai ,  Toshifumi Takeuchi ,  Shinichi Tanaka ,  Akira Kurahashi ,  Toshiyuki Shimada

IPC分类号： H04B14/04

CPC分类号： H03M5/145 ,  G11B20/1426 ,  H04L7/041 ,  H04L25/4906

摘要： A transmitting method of digital data whereby information data can be reproduced at a high precision. In order to retain digital data in sectors comprising a plurality of sync frames and sequentially transmit, the sync frame is comprised of the sync signal and the run length limited code which satisfies the limitations of the minimum run length and the maximum run length, and the sync signal includes the sync pattern constituted by a bit pattern of a run length that is longer than the maximum run length by only 3T and addition bit patterns which are arranged before and after the bit pattern and each of which has a urn length that is longer than the minimum run length. The sync signal includes a specific code which indicates a position in the sector and which enables the DC control to be performed.

摘要翻译： 数字数据的发送方法，可以高精度地再现信息数据。 为了在包括多个同步帧的扇区中保留数字数据并顺序地发送，同步帧包括满足最小游程长度和最大游程长度的限制的同步信号和游程长度限制码，并且 同步信号包括由游程长度比最大游程长度仅3T的位模式构成的同步模式，以及排列在位模式之前和之后的相加位模式，并且每个模式的urn长度为 长于最小游程长度。 同步信号包括指示扇区中的位置并且能够执行DC控制的特定代码。

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。