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32 条记录 (耗时 0.014 秒)

    Decoding method and system for doubly-encoded reed-solomon codes
    2.
    发明公开
    Decoding method and system for doubly-encoded reed-solomon codes 失效
    Dekodierungsverfahren und Systemfürdoppelt kodierte Reed-Solomon-Kodes。

    公开(公告)号：EP0140381A2

    公开(公告)日：1985-05-08

    申请号：EP84113116.2

    申请日：1984-10-31

    申请人： HITACHI, LTD.

    发明人： Okamoto, Hiroo ,  Kobayashi, Masaharu ,  Kimura, Hiroyuki ,  Noguchi, Takaharu ,  Arai, Takao

    IPC分类号： G11B20/18 ,  H03M13/00

    CPC分类号： G11B20/1809 ,  G06F11/10 ,  H03M13/29

    摘要： Disclosed is an error correction in reproducing a digital signal of a digital audio system or a PCM reproducing system.
    Code words such as doubly-encoded Reed-Solomon code comprise first code blocks including a plurality of information words arranged in a first arrangement and a plurality of first check words generated by a code having a Hamming distance of d, to said information words, and second code blocks including a plurality of information words arranged in a second arrangement and a plurality of first check words each having a plurality of information words and a plurality of first check words belonging to different one of said first blocks, and a plurality of second check words generated by a code having a Hamming distance of d 2 to said plurality of information words and said plurality of first check words, are decoded to correct errors. For such a doubly-encoded error correction code, at least error detection is effected in a first decoding and flags indicating decoding conditions are added. In a second decoding, error detection for the first code blocks and error correction for S 2 words at unknown locations and E flagged word erasure, where S 2 and E satisfy a relation of 2S 2 + E S d, - 1, are parallelly or sequestially are effected, and a combination of S 2 and E having a high correction capability and a low probability of mis-correction is selected from a plurality of correction results of error locations and the number of flags added at the first decoding, and the word errors are corrected based on the selected combination.

    摘要翻译： 公开了在再现数字音频系统或PCM再现系统的数字信号时的纠错。 诸如双重编码的里德 - 所罗门码之类的码字包括第一码块，包括以第一排列排列的多个信息字，以及由具有汉明距离d1的码与所述第一码生成的多个第一校验字 信息字和第二码块，其包括以第二配置排列的多个信息字以及多个第一检查字，每个具有多个信息字和属于所述第一块中的不同一个的多个第一校验字， 通过对所述多个信息字和所述多个第一检查词具有汉明距离d2的码产生的多个第二检查字进行解码以校正错误。 对于这种双重编码的纠错码，至少在第一解码中进行错误检测，并且添加指示解码条件的标志。 在第二解码中，第一代码块的错误检测和未知位置处的S2字的纠错和E标记的字擦除（其中S2和E满足2S2 + E <= d1-1）的关系是并行或隔离的 并且从错误位置的多个校正结果和在第一解码期间添加的标志数选择具有高校正能力和低错误概率的S2和E的组合，并且校正字错误 基于所选择的组合。

    Additional information embedding and detecting method and apparatus
    5.
    发明公开
    Additional information embedding and detecting method and apparatus 有权
    为附加信息集成和检测方法和装置，

    公开(公告)号：EP1032205A2

    公开(公告)日：2000-08-30

    申请号：EP00301352.1

    申请日：2000-02-21

    申请人： SONY CORPORATION ,  Hitachi, Ltd. ,  Pioneer Corporation

    发明人： Kohashi, Takashi ,  Ogino, Akira ,  Kimura, Hiroyuki ,  Yoshiura, Hiroshi ,  Moriyama, Yoshiaki ,  Sugaya, Kazumi

    IPC分类号： H04N5/92 ,  G09C5/00

    CPC分类号： G06T1/0071 ,  G06T1/005 ,  G06T2201/0052 ,  G06T2201/0065 ,  H04N5/913 ,  H04N2005/91335

    摘要： An apparatus and method for embedding additional information embeds plural pieces of additional information on a signal as electronic watermark information. In detail, plural pieces of additional information to be embedded on a signal are generated, the additional information is converted into electronic watermark information, the sizes of embedding parts for respective electronic watermark information are defined under control, and the electronic watermark information is embedded on the signal based on the control signal. Therefore, the additional information are embedded so that additional information having a higher significance degree can be more reliably and rapidly detected.

    摘要翻译： 用于嵌入附加信息的设备和方法嵌入的信号作为电子水印信息的多条附加信息。 详细地说，的多条附加信息要被嵌入的信号中产生，所述另外的信息被转换成电子水印信息，嵌入用于respectivement电子水印信息的部分的尺寸被控制之下定义的，并且该电子水印信息被嵌入上 基于所述控制信号的信号。 因此，象具有较高重要程度可以更可靠和迅速地检测到的附加信息的附加信息被嵌入。

    Recording/reproducing method and apparatus, processing apparatus, and recording medium for video signal having copy control information
    9.
    发明公开
    Recording/reproducing method and apparatus, processing apparatus, and recording medium for video signal having copy control information 有权
    记录/再现方法和设备，处理设备和用于具有复制控制信息的视频信号的记录介质

    公开(公告)号：EP0903736A3

    公开(公告)日：1999-09-29

    申请号：EP98307255.4

    申请日：1998-09-08

    申请人： HITACHI, LTD.

    发明人： Kimura, Hiroyuki ,  Arai, Takao ,  Takeuchi, Toshifumi

    IPC分类号： G11B20/00 ,  H04N5/913

    CPC分类号： G06T1/0028 ,  G11B20/00086 ,  G11B20/00768 ,  G11B20/00884 ,  H04N5/913 ,  H04N2005/91328 ,  H04N2005/91335

    摘要： Electronic watermark information obtained by changing a luminance value of a luminance signal in a video signal and a copy generation management signal (CGMS signal) inserted into an area out of a scan region of the video signal are recorded into a recording medium. A reproducing apparatus comprises an electronic watermark information detecting circuit, a CGMS signal detecting circuit, a control circuit to which detected electronic watermark information and CGMS signal are supplied, and a video signal processing circuit controlled by an output of the control circuit. When the electronic watermark information and the CGMS signal have a rational relation, the video signal processing circuit is controlled to output the video signal.

    摘要翻译： 通过改变视频信号中的亮度信号的亮度值而获得的电子水印信息和插入到视频信号的扫描区域之外的区域中的复制代管理信号（CGMS信号）被记录到记录介质中。 一种再现设备包括电子水印信息检测电路，CGMS信号检测电路，被提供检测到的电子水印信息和CGMS信号的控制电路，以及由控制电路的输出控制的视频信号处理电路。 当电子水印信息和CGMS信号具有合理的关系时，控制视频信号处理电路输出视频信号。

    Recording/reproducing method and apparatus, processing apparatus, and recording medium for video signal having copy control information
    10.
    发明公开
    Recording/reproducing method and apparatus, processing apparatus, and recording medium for video signal having copy control information 有权
    一种记录/再现方法和装置，处理装置，和用于与复制控制信息的视频信号记录介质

    公开(公告)号：EP0903736A2

    公开(公告)日：1999-03-24

    申请号：EP98307255.4

    申请日：1998-09-08

    申请人： HITACHI, LTD.

    发明人： Kimura, Hiroyuki ,  Arai, Takao ,  Takeuchi, Toshifumi

    IPC分类号： G11B20/00 ,  H04N5/913

    CPC分类号： G06T1/0028 ,  G11B20/00086 ,  G11B20/00768 ,  G11B20/00884 ,  H04N5/913 ,  H04N2005/91328 ,  H04N2005/91335

    摘要： Electronic watermark information obtained by changing a luminance value of a luminance signal in a video signal and a copy generation management signal (CGMS signal) inserted into an area out of a scan region of the video signal are recorded into a recording medium. A reproducing apparatus comprises an electronic watermark information detecting circuit, a CGMS signal detecting circuit, a control circuit to which detected electronic watermark information and CGMS signal are supplied, and a video signal processing circuit controlled by an output of the control circuit. When the electronic watermark information and the CGMS signal have a rational relation, the video signal processing circuit is controlled to output the video signal.

    摘要翻译： 通过改变视频信号和亮度信号在区域插入到出视频信号的扫描区域的复制产生管理信号（CGMS信号）的亮度值而获得的电子水印信息被记录到记录介质中。 电子水印信息检测电路的再现设备包括：，一个CGMS信号检测电路，一控制电路，其检测的电子水印信息和CGMS信号被提供，并且通过在所述控制电路的输出控制的视频信号处理电路。 当电子水印信息和CGMS信号具有合理的关系，视频信号处理电路被控制以输出视频信号。