公开(公告)号：US06463155B1

公开(公告)日：2002-10-08

申请号：US09219889

申请日：1998-12-24

申请人： Koichiro Akiyama ,  Toru Kambayashi ,  Shuichi Tsujimoto ,  Naoki Endoh

发明人： Koichiro Akiyama ,  Toru Kambayashi ,  Shuichi Tsujimoto ,  Naoki Endoh

IPC分类号： H04L908

CPC分类号： H04H20/28 ,  H04H60/15 ,  H04H60/16 ,  H04H60/23 ,  H04L9/0822 ,  H04L9/0891 ,  H04L2209/601 ,  H04L2209/603 ,  H04N7/165 ,  H04N21/2541

摘要： A conditional access broadcast system for realizing conditional access while maintaining the safety level is disclosed. A contract management device at a broadcast station side delivers a reception contract information containing at least a contract information for controlling decryption of encrypted contents information delivered from a broadcast station by broadcast and a reception device ID in correspondence, which is encrypted using a master key which is commonly provided with respect to all the broadcast reception devices. At each broadcast reception device, whether or not to give a channel key for decrypting the encrypted contents information to the decryption unit is controlled according to the contract information for own broadcast reception device which is acquired from the encrypted reception contract information.

摘要翻译： 公开了一种用于在保持安全等级的同时实现条件访问的条件访问广播系统。 广播站侧的合同管理装置向用户提供至少包含用于控制从广播站发送的加密内容信息的解密的对应信息和对应的接收装置ID的接收合同信息，使用主密钥加密 通常为所有广播接收设备提供。 在每个广播接收装置中，根据从加密的接收合同信息获取的自己的广播接收装置的合同信息来控制是否向解密单元提供用于解密加密的内容信息的频道密钥。

公开(公告)号：US5819103A

公开(公告)日：1998-10-06

申请号：US308549

申请日：1994-09-21

申请人： Naoki Endoh ,  Toshimitsu Kaneko ,  Shunichi Numazaki

发明人： Naoki Endoh ,  Toshimitsu Kaneko ,  Shunichi Numazaki

IPC分类号： G06F3/0481 ,  G06F15/00

CPC分类号： G06F3/0481

摘要： An information recording/reproducing apparatus includes a first processing unit, a link information generating unit, a link information storage unit, and a second processing unit. The first processing unit processes information constituted by a plurality of information units and subjected to a recording/reproducing operation. The link information generating unit generates link information representing the relationship between arbitrary information units of the information units constituting the information. The link information storage unit stores the link information generated by the link information generating unit. The second processing unit performs predetermined processing with respect to the link information when an information unit corresponding to the link information stored in the link information storage unit is processed by the first processing unit.

摘要翻译： 信息记录/再现装置包括第一处理单元，链接信息生成单元，链接信息存储单元和第二处理单元。 第一处理单元处理由多个信息单元构成并进行记录/再现操作的信息。 链接信息生成单元生成表示构成信息的信息单元的任意信息单元之间的关系的链接信息。 链接信息存储单元存储由链接信息生成单元生成的链接信息。 当与第一处理单元处理存储在链接信息存储单元中的链接信息相对应的信息单元时，第二处理单元对链接信息进行预定处理。

公开(公告)号：US5170388A

公开(公告)日：1992-12-08

申请号：US557094

申请日：1990-07-25

申请人： Naoki Endoh

发明人： Naoki Endoh

IPC分类号： H04N5/92 ,  H04N9/802

CPC分类号： H04N9/802 ,  H04N5/92

摘要： An image/audio information recording/reproduction apparatus has a first recording device for receiving a first electrical signal representing image information and recording the image information on a dynamic recording medium of a given type, a static recording medium of a given type for storing a second electrical signal digitally representing audio information accompanying the image information, and a second recording device which is electrically connected to the static recording medium. The second recording device determines a memory address in the static recording medium of audio information accompanying the image information in a manner corresponding to a recording position of the image information on the dynamic recording medium, and records the audio information in the static recording medium in accordance with the determined memory address. The static recording medium includes a non-volatile semiconductor memory, such as an electrically erasable programmable read only memory.

摘要翻译： 图像/音频信息记录/再现装置具有第一记录装置，用于接收表示图像信息的第一电信号并将图像信息记录在给定类型的动态记录介质上，给定类型的静态记录介质用于存储第二 数字地表示伴随图像信息的音频信息的电信号，以及电连接到静态记录介质的第二记录装置。 第二记录装置以与动态记录介质上的图像信息的记录位置相对应的方式确定伴随图像信息的音频信息的静态记录介质中的存储器地址，并将音频信息记录在静态记录介质中 与确定的内存地址。 静态记录介质包括非易失性半导体存储器，诸如电可擦除可编程只读存储器。

公开(公告)号：US5042037A

公开(公告)日：1991-08-20

申请号：US387792

申请日：1989-08-01

申请人： Naoki Endoh

发明人： Naoki Endoh

IPC分类号： G11B20/18 ,  H03M13/00

CPC分类号： G11B20/1809

摘要： In a digital data modulation circuit, a digital data block formed of k words, each of which includes m-bit binary data, is input to an error-correcting coding circuit which adds (n-k) check words to the input data block. The error-correcting coded data block is supplied to an arithmetic operation circuit, which calculates the number of "1" bits and the number of "0" bits to be included in the coded data block output from the error-correcting coding circuit so that the difference between the number of "0" bits and the number of "1" bits included in the coded data blocks which have been output from the error-correcting coding circuit approximates 0 and calculates one control word corresponding to the calculated number. The coded data block output from the error correcting coding circuit is supplied to a modulo-two adder which adds the control word to every word belonging to the coded data block.

公开(公告)号：US4553131A

公开(公告)日：1985-11-12

申请号：US594869

申请日：1984-03-29

申请人： Naoki Endoh

发明人： Naoki Endoh

IPC分类号： H03M7/14 ,  G11B20/14 ,  H04L25/49 ,  G11B5/09

CPC分类号： G11B20/1426

摘要： In an encode method in which a binary data stream is divided into data words each of three bits. Each of the data words is encoded into a binary code word of 9 bits. In the method, a code word to be encoded is encoded in consideration of a code word preceding the code word and two code words succeeding the code word. Then, one of the first two code bits in each code word and two of the last five code bits in the preceeding code word are inverted according to a pattern of code bits "0" and "1" in both the code words. As a result, consecutive 5 to 19 code bits "0" are arrayed between two adjacent code bits "1" in the code word stream.

摘要翻译： 在二进制数据流被分成三比特的数据字的编码方法中。 每个数据字被编码为9位的二进制码字。 在该方法中，考虑到代码字之前的代码字和代码字之后的两个代码字，对要编码的代码字进行编码。 然后，在两个代码字中，根据代码位“0”和“1”的模式，将每个代码字中的前两个代码位之一和前一代码字中最后五个代码位中的两个代码位之一反转。 结果，连续的5〜19个码位“0”被排列在码字流中的两个相邻码位“1”之间。