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21.发明授权Information signal reproducing apparatus and information signal reproducing method 失效重放信息信号和方法装置重放信息信号
公开(公告)号：EP0710956B1
公开(公告)日：2000-02-09
申请号：EP95118698.0
申请日：1989-10-31
申请人： Hitachi, Ltd.
发明人： Saito, Seiichi , Takeuchi, Toshifumi , Nakamura, Masafumi, Hachimanyama , Shiokawa, Junji, Keimeiryo 405, 850, Maiokacho, , Kawamae, Osamu
CPC分类号： G11B20/1813 , G11B20/10527 , G11B20/1208 , G11B20/1809 , G11B27/3027 , G11B2020/10537 , G11B2220/90
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公开(公告)号：EP0854483A3
公开(公告)日：1998-12-16
申请号：EP98100814.7
申请日：1998-01-19
申请人： Hitachi, Ltd.
CPC分类号： G11B20/1813 , G11B2020/183 , H04N5/9262 , H04N5/945
摘要： A quick retry operation is possible by outputting an error flag pertaining to a sector after error correction processing of digital data. When an output of an error detection flag unit for a correction block indicates the existence of an uncorrectable error, the sectors are checked to see if the sectors corresponding to retrieved data include any error or not based on output from a sector error flag register B. When the sectors are judged as error, signals are retrieved again from a storage medium, re-stored in a memory, and an error correction processing is repeated again. The data such as that of P pictures or B pictures of MPEG which can be reproduced even with errors are output even when the error detection flag unit indicates the existence of the uncorrectable error. It enables identification of the sectors with the errors and simplifies the following operations pertaining to the error at a data receiving side by outputting the error flag along with the data.
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公开(公告)号：EP0729153A2
公开(公告)日：1996-08-28
申请号：EP96101933.8
申请日：1996-02-09
申请人： HITACHI, LTD.
发明人： Hirabayashi, Masayuki , Suzuki, Hideaki , Nakamura, Masafumi , Nagai, Yutaka , Takeuchi, Toshifumi
CPC分类号： G11B20/00007 , G11B7/00745 , G11B20/1251 , G11B27/005 , G11B27/105 , G11B27/3027 , G11B27/329 , G11B2220/20 , H04N5/783 , H04N5/85 , H04N9/8042 , H04N9/8205
摘要： An optical disk recording thereon compressed moving picture data and an optical disk reproduction apparatus each capable of easily effecting trick play such as high speed reproduction and a retrieval operation at a high speed. Additional information necessary for trick play is recorded in an arbitrary area of an optical disk such as a TOC (Table of Contents) or a leading sector (sector 0) of the disk, and a sector address is added to each sector. To conduct trick play, an I picture, a P picture and a B picture contained in a GOP layer inside a bit stream of compressed image data are extracted and reproduced in accordance with a reproduction speed by looking up a trick play table.
摘要翻译： 一种在其上记录压缩的运动图像数据的光盘和一种光盘再现设备，每个设备都能够容易地实现高速再现和高速检索操作等特技播放。 特技播放所需的附加信息被记录在光盘的任意区域，例如磁盘的TOC（内容表）或前导扇区（扇区0），扇区地址被添加到每个扇区。 为了进行特技播放，通过查找特技播放表，根据再现速度提取压缩图像数据的位流内的GOP层中包含的I图像，P图像和B图像，并再现它们。
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24.发明公开Digital signal reproduction devices, integrated circuits for use therewith, and digital signal reproduction methods 失效装置，用于再现数字信号，集成电路为此，和方法，用于再现数字信号。
公开(公告)号：EP0597372A3
公开(公告)日：1996-05-15
申请号：EP93117802.4
申请日：1993-11-03
申请人： HITACHI, LTD.
发明人： Takeuchi, Toshifumi , Kimura, Izumi, Daiichi Kaneyoshi Haitsu 309 , Kawamae, Osamu , Obata, Shinichi , Tadokoro, Hiroshi , Nagai, Yutaka
CPC分类号： G11B20/18 , G11B20/10 , G11B20/1403 , G11B20/1866 , G11B20/1876 , G11B27/36
摘要： A digital signal reproduction device including a data strobe circuit high in margin against noise and rapid in recovery from dropout of data and a digital signal reproduction method performed in such device. The digital signal reproduction device includes a pair of data strobe circuits (4, 5) and a switching circuit (3) for selecting one of the outputs of the pair of data strobe circuits, and a circuit (1, 2) for generating from the received signal a signal to control the switching circuit (3). The data strobe circuits (4, 5) ensure high reliability of the received signal against noise and a short time from dropout of the received signal to acquisition of a reproduction clock. The data strobe circuit (4 or 5) is selectable which is suitable for the reproduction state of the reproduced signal.
摘要翻译： 的数字信号再现装置，其包括在对噪声和在从数据的脱落，在这种设备中执行的数字信号再现方法恢复快速高裕度的数据选通电路。 该数字信号再现装置包括一对数据选通电路（4,5）和开关电路（3），用于选择所述一对数据选通电路的输出中的一个，和一个电路（1,2），用于从产生 接收到的信号的信号来控制开关电路（3）。 数据选通电路（4，5）确保防止噪声的接收信号，并从接收到的信号以获取一个再现时钟的脱落短时间内的高可靠性。 数据选通电路（4或5）是可选择的所有其适合于再现信号的再现状态。
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公开(公告)号：EP0658052A3
公开(公告)日：1995-10-18
申请号：EP94119441.7
申请日：1994-12-08
申请人： HITACHI, LTD.
CPC分类号： H04N5/78263 , H04N5/78213 , H04N5/783 , H04N5/913 , H04N9/7904 , H04N9/7973 , H04N9/802 , H04N9/8042 , H04N9/83 , H04N9/87 , H04N2005/91364
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 (301) by magnetic heads (301a, 301b and 302a, 302b) on a rotary drum (300). In another arrangement in which the audio signals multiplexed in frequency are recorded on the audio track adjacent to the video tracks on the magnetic tape (310) by the magnetic heads (303a, 303b) and the decision circuit (264), by utilizing the signal reproduced from the audio track, determines whether the signal recorded on the video tracks is analog or digital, the input analog wide-band video signal is divided into signals of two channels by the recording-system analog signal processing circuit (57), those signals are recorded on the magnetic tape (60) in multi-track recording by a pair of magnetic heads (62a, 62b) and another pair of magnetic heads (62, 62d), the input audio signals are modulated by the FM modulator (15) and the QPSK modulator (16), and recorded in a deep-layer portion of another track between the video tracks. A compressed digital digital signal received by the antenna (1) is added with error correction codes by the recording-system digital signal processing circuit (5), and is modulated by the 16QAM modulator (6) so that the spectral components of the compressed digital signal does not enter the audio signal frequency band, and is recorded on said audio track superposed but in a deeper-layer portion of the tape by yet another pair of magnetic heads (64a, 64b).
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公开(公告)号：EP0854483B1
公开(公告)日：2007-11-21
申请号：EP98100814.7
申请日：1998-01-19
申请人： Hitachi, Ltd.
CPC分类号： G11B20/1813 , G11B2020/183 , H04N5/9262 , H04N5/945
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公开(公告)号：EP1006730A3
公开(公告)日：2004-12-08
申请号：EP99123774.4
申请日：1999-11-30
发明人： Yoshiura, Hiroshi , Echizen, Isao , Arai, Takao , Kimura, Hiroyuki , Takeuchi, Toshifumi , Moriyama, Yoshiaki, c/o Sogo Kenkyusho , Sugaya, Kazumi, c/o Sogo Kenkyusho , Ogino, Akira
IPC分类号： H04N7/26
CPC分类号： G06T1/0085 , G06T1/0028 , G06T2201/0065 , H04N19/467 , H04N19/51 , H04N19/61 , H04N21/23892 , H04N21/8358
摘要： A watermark information embedding method, and apparatus, capable of suppressing the quality degradation of contents and increasing the survivability of embedded information. When embedding watermark information in moving picture data formed of a plurality of still picture frames arranged in time series, a motion vector representing a property specific to moving picture is detected (22, 224) for each of image blocks generated by dividing a target frame. According to a motion quantity, a pixel change factor specifying rule (32, 320) is selected (23) for each block. Out of pixels permitted to be changed in luminance depending upon the state of an image in each block representing a property specific to still picture, as many pixels as a number specified by the selected rule (33) are selected (24). Luminance change processing for forming watermark information is conducted (25) on the selected pixels.
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公开(公告)号：EP0901274B1
公开(公告)日：2004-04-07
申请号：EP98116500.4
申请日：1998-09-01
申请人： Hitachi, Ltd.
发明人： Yoshiura, Hiroshi , Echizen, Isao , Taguchi, Junichi , Maeda, Akira , Arai, Takao , Takeuchi, Toshifumi
CPC分类号： H04N19/00 , G06T1/0028 , G06T1/005 , G06T1/0071 , G06T2201/0051 , H04N1/32203 , H04N1/32208 , H04N1/32229 , H04N1/32251 , H04N1/32288 , H04N19/467 , H04N21/23892 , H04N21/8358
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29.发明公开Optical disk and optical disk reproduction apparatus 失效Optische Platte und optischesPlattenwiedergabegerät
公开(公告)号：EP0930618A3
公开(公告)日：2002-08-28
申请号：EP99108514.3
申请日：1996-02-09
申请人： Hitachi, Ltd.
发明人： Hirabayashi, Masayuki , Suzuki, Hideaki , Nakamura, Masafumi , Nagai, Yutaka , Takeuchi, Toshifumi
CPC分类号： G11B20/00007 , G11B7/00745 , G11B20/1251 , G11B27/005 , G11B27/105 , G11B27/3027 , G11B27/329 , G11B2220/20 , H04N5/783 , H04N5/85 , H04N9/8042 , H04N9/8205
摘要： An optical disk recording thereon compressed moving picture data and an optical disk reproduction apparatus each capable of easily effecting trick play such as high speed reproduction and a retrieval operation at a high speed. Additional information necessary for trick play is recorded in an arbitrary area of an optical disk such as a TOC (Table of Contents) or a leading sector (sector 0) of the disk, and a sector address is added to each sector. To conduct trick play, an I picture, a P picture and a B picture contained in a GOP layer inside a bit stream of compressed image data are extracted and reproduced in accordance with a reproduction speed by looking up a trick play table.
摘要翻译： 一种包括压缩运动图像数据的光盘和能够以高速轻松实现高速再现和检索操作的特技播放的光盘再现装置。 特殊播放所需的附加信息被记录在诸如TOC（目录）或盘的前导扇区（扇区0）的光盘的任意区域中，并且扇区地址被添加到每个扇区。 为了进行特技播放，通过查找特技播放表，根据再现速度提取并再现包含在压缩图像数据的比特流内的GOP层中的I图像，P图像和B图像。
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公开(公告)号：EP0729153B1
公开(公告)日：2001-11-14
申请号：EP96101933.8
申请日：1996-02-09
申请人： Hitachi, Ltd.
发明人： Hirabayashi, Masayuki , Suzuki, Hideaki , Nakamura, Masafumi , Nagai, Yutaka , Takeuchi, Toshifumi
IPC分类号： G11B27/32 , G11B20/12 , G11B21/08 , G11B27/10 , G11B27/30 , G11B19/02 , G11B7/00 , H04N5/85 , H04N5/926 , H04N9/804
CPC分类号： G11B20/00007 , G11B7/00745 , G11B20/1251 , G11B27/005 , G11B27/105 , G11B27/3027 , G11B27/329 , G11B2220/20 , H04N5/783 , H04N5/85 , H04N9/8042 , H04N9/8205
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