公开(公告)号：EP1443510B1

公开(公告)日：2012-08-01

申请号：EP04008723.1

申请日：1999-04-13

Applicant: Hitachi Ltd.

Inventor： Kawamae, Osamu ,  Takeuchi, Toshifumi c/o Hitachi, Ltd. ,  Kimura, Hiroyuki ,  Arai, Takao ,  Yoshiura, Hiroshi

IPC: G11B20/00 ,  G11B20/12 ,  G11B27/10 ,  H04N5/913 ,  G06F21/00

CPC classification number: 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

公开(公告)号：EP0964397A3

公开(公告)日：2007-12-19

申请号：EP99111941.3

申请日：1994-06-06

Applicant: Hitachi, Ltd.

Inventor： Amada, Nobutaka ,  Arai, Takao ,  Noguchi, Takaharu

IPC: G11B20/00

CPC classification number: G11B20/0071 ,  G11B5/00813 ,  G11B15/1875 ,  G11B20/00007 ,  G11B20/00086 ,  G11B20/00188 ,  G11B20/0021 ,  G11B20/00246 ,  G11B20/00557 ,  G11B20/00695 ,  G11B20/0084 ,  G11B27/3027 ,  G11B27/3036 ,  G11B2220/90 ,  H04N5/765 ,  H04N5/78263 ,  H04N5/919 ,  H04N5/9201 ,  H04N5/9261 ,  H04N5/9265

Abstract: A digital information recording-reproducing apparatus is disclosed, in which the recording means records a digital information signal and a control code. The reproducing means detects the control code when the digital information signal is reproduced, and only outputs the digital information signal if the detected control code satifies a predetermined condition. The control code may specify the data type, a time period, or user or apparatus identifier. The control code may include information for decrypting an encrypted digital information signal.

公开(公告)号：EP0901102B1

公开(公告)日：2004-11-24

申请号：EP98116571.5

申请日：1998-09-02

Applicant: Hitachi, Ltd.

Inventor： Echizen, Isao ,  Yoshiura, Hiroshi ,  Nakamura, Masafumi ,  Arai, Takao ,  Takeuchi, Toshifumi

IPC: G06T1/00

CPC classification number: G06T1/0021 ,  G06T2201/0051 ,  G06T2201/0061 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32229 ,  H04N1/32251 ,  H04N2201/3233 ,  H04N2201/327

公开(公告)号：EP0779623A3

公开(公告)日：2001-02-28

申请号：EP96119545.0

申请日：1996-12-05

Applicant: KABUSHIKI KAISHA TOSHIBA ,  PIONEER ELECTRONIC CORPORATION ,  Hitachi, Ltd. ,  MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

Inventor： Kojima, Tadashi ,  Hirayama, Koichi ,  Yamada, Hisashi ,  Moriyama, Yoshiaki, Corp. Res. and Dev. Lab. ,  Yokogawa, Fumihiko, Corp. Res. and Dev. Lab. ,  Arai, Takao ,  Takeuchi, Toshifumi ,  Tanaka, Shinichi ,  Kurahashi, Akira ,  Shimada, Toshiyuki

IPC: G11B20/14

CPC classification number: H03M5/145 ,  G11B20/1426 ,  H04L7/041 ,  H04L25/4906

Abstract: 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 run 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.

公开(公告)号：EP0901282A2

公开(公告)日：1999-03-10

申请号：EP98306484.1

申请日：1998-08-14

Applicant: HITACHI, LTD.

Inventor： Kimura, Hiroyuki ,  Arai, Takao ,  Takeuchi, Toshifumi ,  Yoshiura, Hiroshi, 102 Berugureisu-miyazakidai

IPC: H04N5/913

CPC classification number: G06T1/005 ,  G06T1/0085 ,  G06T2201/0065 ,  H04N5/913 ,  H04N21/23892 ,  H04N21/8358 ,  H04N2005/91335

Abstract: At recording of a video signal, with electronic watermark information being embedded therein, on a recording medium, a reference signal which is formed differently from the watermark information is inserted to the video signal. At reproduction of the video signal, the luminance of the watermark information is modified based on the reference signal.

Abstract translation: 在视频信号的记录，具有电子水印信息被嵌入其中，在记录介质上，这是从水印信息不同地形成的参考信号的所有被插入到视频信号上。 在视频信号的再现时，水印信息的亮度被修改基于所述参考信号。

公开(公告)号：EP0901276A2

公开(公告)日：1999-03-10

申请号：EP98306973.3

申请日：1998-09-01

Applicant: HITACHI, LTD.

Inventor： Kawamae, Osamu ,  Takeuchi, Toshifumi ,  Yoshiura, Hiroshi ,  Arai, Takao

IPC: H04N1/32

CPC classification number: H04N1/32149 ,  G06T1/0071 ,  H03M13/13 ,  H03M13/6306 ,  H04L1/0045 ,  H04L1/08 ,  H04N1/32288 ,  H04N19/467 ,  H04N2201/3284

Abstract: In a data transmission method for information data containing additional information data therewith, comprising, at a transmitter side, following steps:

adding error correction codes for correcting error to said additional information data;
embedding said additional information data added with said error correction codes into the information data by plural times, repetitively; and
transmitting the information data embedded with the repetitive additional information data therein, and comprising, at a receiver side, following steps:
receiving the transmitted information data embedded with the repetitive additional information data therein;
detecting the repetitive additional information data embedded from said transmitted information data received;
determining said additional information data on a basis of a majority rule when receiving said information data; and
correcting error with using the error correction codes received and determined when said additional information data contains error(s) therein.

Abstract translation: 在用于包含附加信息数据用有，包括，在发射机侧的信息数据的数据传输方法，步骤如下：将纠错码用于校正错误的所述附加信息数据; 所述嵌入了所述纠错码插入通过多次，重复的信息数据增加附加信息数据; 和发射嵌有附加信息的重复数据。其中，该信息数据包括，在接收机侧，下列步骤：接收嵌入有在其中的附加信息重复的数据的反式mitted信息数据; 检测从所述接收的反式mitted信息数据的重复附加嵌入式信息数据; 确定性采矿多数所述规则的基础上的附加信息数据。当接收所述信息数据; 以及使用接收到的和确定性开采的纠错码，当所述附加信息数据的纠错包含错误（多个）在其中。

公开(公告)号：EP0501430A3

公开(公告)日：1995-03-22

申请号：EP92103200.9

申请日：1992-02-25

Applicant: HITACHI, LTD.

Inventor： Nagai, Yutaka ,  Takeuchi, Toshifumi ,  Arai, Takao ,  Okamoto, Hiroo ,  Noguchi, Takaharu ,  Itoh, Shigeyuki

IPC: G11B27/30 ,  G11B20/10 ,  G11B20/12

CPC classification number: G11B27/3027 ,  G11B20/10527 ,  G11B20/1208 ,  G11B2020/1087 ,  G11B2220/90

Abstract: A recording method is provided for a video tape recording apparatus having modes for recording PCM audio signals in a plurality of transmission rates. Index codes (104) for a video signal, which enable a search reproduction and so on, are recorded on a video tape in a constant transmission rate irrespective of the transmission rate of a PCM audio signal to be recorded. Further, an amble pattern (501) at the same frequency as the transmission rate of the PCM audio signal is recorded immediately behind the PCM signal recording area (102). A reproducing apparatus may be provided only with an index detecting circuit (603) corresponding to the constant transmission rate.

Abstract translation: 为具有用于以多种传输速率记录PCM音频信号的模式的录像带记录装置提供了一种记录方法。 无论要记录的PCM音频信号的传输速率如何，用于视频信号的索引代码（104）都能以恒定的传输速率记录在录像带上，这使得能够进行搜索重放等。 此外，与PCM音频信号的传输速率相同的频率上的缓存模式（501）被记录在PCM信号记录区（102）的正后方。 再现设备可以仅设置有对应于恒定传输速率的索引检测电路（603）。

公开(公告)号：EP0222386B1

公开(公告)日：1992-07-22

申请号：EP86115708.9

申请日：1986-11-12

Applicant: HITACHI, LTD.

Inventor： Arai, Takao ,  Kobayashi, Masaharu ,  Amada, Nobutaka ,  Yumde, Yasufumi ,  Takahashi, Hiroaki

IPC: G11B20/18 ,  G11B20/10

CPC classification number: H04N5/928 ,  G11B20/10527 ,  G11B20/1809 ,  G11B2020/1087

公开(公告)号：EP0140381B1

公开(公告)日：1991-03-06

申请号：EP84113116.2

申请日：1984-10-31

Applicant: HITACHI, LTD.

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

IPC: G11B20/18 ,  H03M13/00

CPC classification number: G11B20/1809 ,  G06F11/10 ,  H03M13/29

公开(公告)号：EP0217152A3

公开(公告)日：1988-11-17

申请号：EP86112070

申请日：1986-09-01

Applicant: HITACHI, LTD.

Inventor： Yoshioka, Atsushi ,  Miura, Kuniaki ,  Kotani, Kazunori ,  Masuda, Michio ,  Yumde, Yasufumi ,  Arai, Takao

IPC: H04N09/80

CPC classification number: H04N9/7921 ,  H04N9/825 ,  H04N9/8355

Abstract: Disclosed is a VTR of the helical scan type having a plurality of rotary magnetic heads (38 to 43). This VTR can select one of a first and a second signal recording forms which are different from each other, and record signals on a magnetic tape (44, 60). In the first recording form, a frequency-modulated video signal including a luminance signal and a color signal and a frequency-modulated sound signal are recorded on the same track so as to be superimposed one on the other. In the second signal recording form, a frequency-modulated luminance signal and a frequency-modulated color signal are recorded separately on tracks adjacent to each other. This VTR has compatibility with respect to the record- ingireproducing of two different signals.