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1. 发明授权

EP0632445B1 Digital information recording-reproducing apparatus 失效
标题翻译：记录和数字信息再现装置
公开(公告)号：EP0632445B1
公开(公告)日：2002-01-23
申请号：EP94108652.2
申请日：1994-06-06
申请人： Hitachi, Ltd.
发明人： Amada, Nobutaka , Arai, Takao , Noguchi, Takaharu , Okamoto, Hiroo , Yamazaki, Shigeru
IPC分类号： G11B20/10 , G11B15/18 , G11B5/008 , G11B27/30 , H04N5/91 , G11B20/00 , G11B27/00 , H04N5/93
CPC分类号： 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

2. 发明公开

EP0554867A2 Magnetic recording/reproducing apparatus 失效
标题翻译：磁记录/重放装置
公开(公告)号：EP0554867A2
公开(公告)日：1993-08-11
申请号：EP93101737.0
申请日：1993-02-04
申请人： HITACHI, LTD.
发明人： Amada, Nobutaka , Nakagaki, Harushige , Arai, Takao , Noguchi, Takaharu
IPC分类号： G11B5/09 , H04N5/782 , G11B5/53 , G11B5/008 , G11B15/18 , H04N5/92
CPC分类号： H04N5/78263 , G11B5/00878 , G11B15/1875 , H04N5/926 , H04N9/7921 , H04N9/7973
摘要： A magnetic recording/reproducing apparatus is provided which includes a head structure compatible with a long-time play mode in handling either of two kinds of signals containing different amounts of information, such as a current digital picture signal and a high-definition (HD) digital picture signal in the rate of two to one at a constant number of revolutions of the drum by restricting an increase of the number of heads. In an aspect of the apparatus, four heads (1a, 1b, 2a, 2b) are arranged on the rotating drum equally 90° spaced, a fifth head (1c) of an opposite azimuth is mounted close to any of those heads, the number of drum revolutions is increased to twice larger than the normal number, the current digital picture signal is recorded and reproduced for each channel by using two heads, that is, the fifth head (1c) and a head positioned 180° opposite to the fifth head. On the other hand, the HD digital picture signal, containing twice as much information as the current digital picture signal, is recorded and reproduced for two channels by four heads (1a, 1b, 2a, 2b) equally 90° spaced, exclusive of the fifth head (1c). According to another aspect, eight heads (5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b) are arranged on the rotating drum equally 45° spaced, ninth and tenth heads (9a, 9b) of an opposite azimuth are mounted respectively close to any two heads (7a, 7b) 180° opposite to each other, and the normal number of drum revolutions is used. Under this condition, the current digital picture signal is recorded and reproduced for two channels by four heads (5a, 5b, 9a, 9b), equally 90° spaced, including the ninth and the tenth heads (9a, 9b), and the HD digital picture signal is recorded and reproduced for four channels by eight heads (5A, 5B, 6A, 6B, 7A, 7B, 8A, 8B), equally 45° spaced, exclusive of the ninth and the tenth heads (9a, 9b).
摘要翻译：提供了一种磁记录/再现设备，其包括在处理包含不同信息量的两种信号中的任何一种信号时（例如当前数字图像信号和高清晰度（HD）图像信号）的与长时间播放模式兼容的头结构，通过限制磁头数量的增加，在鼓的恒定转数下以2比1的速率产生数字图像信号。在该装置的一个方面，四个头（1a，1b，2a，2b）以90°等间隔设置在旋转鼓上，相反方位的第五头（1c）安装在这些头中的任一头附近，的鼓旋转增加到正常数量的两倍时，通过使用两个头，即第五头（1c）和与第五头相对180°定位的头，针对每个通道记录和再现当前数字图像信号。另一方面，包含两倍于当前数字图像信号的信息的HD数字图像信号被四个等间隔90°的头（1a，1b，2a，2b）记录和再现两个信道，不包括第五头（1c）。根据另一方面，八个头部（5a，5b，6a，6b，7a，7b，8a，8b）等间距地布置在旋转鼓轮45°上，相对方位角的第九和第十头部（9a，9b）分别靠近彼此相对180°的任意两个头部（7a，7b），并且使用正常数量的鼓轮旋转。在这种情况下，当前的数字图像信号被四个磁头（5a，5b，9a，9b）（包括第九和第十磁头（9a，9b）等间隔90°）记录和再现两个通道，HD 除了第九和第十读写头（9a，9b）之外，数字图像信号由八个读写头（5A，5B，6A，6B，7A，7B，8A，8B）记录和再现四个通道，等间隔45°。

3. 发明授权

EP0183186B1 Apparatus for recording and reproducing video signal and digital signal other than video signal 失效
标题翻译：用于记录和再现视频信号和数字信号以外的视频信号的装置
公开(公告)号：EP0183186B1
公开(公告)日：1991-08-14
申请号：EP85114778.5
申请日：1985-11-21
申请人： HITACHI, LTD.
发明人： Noguchi, Takaharu , Kimura, Hiroyuki , Kobayashi, Masaharu 331, Hitachi-Hachimanyama Apt. , Yunde, Yasufumi , Arai, Takao , Amada, Nobutaka , Miura, Kuniaki
IPC分类号： H04N9/83 , H04N5/92
CPC分类号： H04N9/802 , H04N5/78213 , H04N9/7933 , H04N9/8233 , H04N9/8355

4. 发明公开

EP0206203A3 Modulator/demodulator for offset quadrature differential phase-shift keying 失效
标题翻译：偏移量调制器/解调器差分相位切换键控
公开(公告)号：EP0206203A3
公开(公告)日：1988-11-23
申请号：EP86108197
申请日：1986-06-16
申请人： HITACHI, LTD.
发明人： Amada, Nobutaka , Noguchi, Takaharu , Kimura, Hiroyuki , Kobayashi, Masaharu , Arai, Takao , Yumde, Yasufumi , Miura, Kuniaki
IPC分类号： H04L27/18 , G11B20/10
CPC分类号： H04L27/2082 , G11B20/10 , H04L27/227
摘要： In an offset quadrature differential PSK modulator, input digital data is first converted by a serial-parallel converter into a first signal Xk and a second signal Yk (in which k is an integer) corresponding to even and odd bits of the digital data respectively with code change points thereof having a mutual deviation of one half data period and, after conversion by differential coders into data Pk = Xk ⊕ Pk-1 and Qk = Yk ⊕ Qk-1 (in which ⊕ means exclusive ORed), such converted data are fed to a quadrature modulator which balanced-modulates two quadrature carriers having a π/2 phase difference from each other by the data Pk and Qk. The output signal of the offset quadrature differential PSK modulator is sent to a transmission channel or memory means. And in an offset quadrature differential PSK demodulator, the signal received from the transmission channel or memory means is fed to a coherent detector, which then phase-detects the signal by two quadrature carriers having a π/2 phase difference from each other, and first and second detection outputs obtained therefrom are decoded by differential decoders and subsequently are fed to a parallel-serial converter, where the former digital data corresponding respectively to the even and odd bits are restored.

5. 发明公开

EP0183186A3 Apparatus for recording and reproducing video signal and digital signal other than video signal 失效
标题翻译：用于记录和再现视频信号和数字信号以外的视频信号的装置
公开(公告)号：EP0183186A3
公开(公告)日：1988-01-20
申请号：EP85114778
申请日：1985-11-21
申请人： HITACHI, LTD.
发明人： Noguchi, Takaharu , Kimura, Hiroyuki , Kobayashi, Masaharu 331, Hitachi-Hachimanyama Apt. , Yunde, Yasufumi , Arai, Takao , Miura, Kuniaki , Amada, Nobutaka
IPC分类号： H04N09/83 , H04N05/92
CPC分类号： H04N9/802 , H04N5/78213 , H04N9/7933 , H04N9/8233 , H04N9/8355
摘要： In a recording and reproducing apparatus wherein a video signal and an audio signal are recorded on the same recording track, a signal subjected to a quadrature differential PSK modulation with PCM audio signal is generated as an audio recording signal. The audio recording signal is disposed between occupied bands of FM luminance signal and down converted chrominance signal in a video recording signal and also recorded on a track where the video recording signal is to be recorded.

6. 发明公开

EP0222386A2 Method and apparatus for PCM recording and reproducing audio signal 失效
标题翻译：方法和装置用于记录和再现的PCM音频信号。
公开(公告)号：EP0222386A2
公开(公告)日：1987-05-20
申请号：EP86115708.9
申请日：1986-11-12
申请人： HITACHI, LTD.
发明人： Arai, Takao , Kobayashi, Masaharu , Amada, Nobutaka , Yumde, Yasufumi , Takahashi, Hiroaki
IPC分类号： G11B20/18 , G11B20/10
CPC分类号： H04N5/928 , G11B20/10527 , G11B20/1809 , G11B2020/1087
摘要： A PCM audio signal recording and reproducing apparatus samples an audio signal accompanying with a video signal, converts it to a PCM signal, adds an error detection correction data to a predetermined number of PCM data, forms a data frame by those signals, modulates it in accordance with a predetermined modulation system, and records the audio signal together with the video signal or singly on a record medium by using a rotary head type scanner. A digital signal processing circuit having a memory of a predetermined capacity is provided, and the number of digital data to be recorded in one data frame is varied in accordance with a difference between the number of input data of the digital audio signal to the digital signal processing circuit and the number of output data supplied to the record medium for recording. In the recording mode, the PCM audio signal is sectioned into blocks, a data block address signal is added to each block to indicate a relative order to other blocks and complete in one track, certain number of blocks are combined to form a block set for processing signals, and an identification signal completing in the block and an interleave block address signal for indicating a relative order to other blocks are added to each block.

7. 发明公开

EP0964397A3 Digital information recording-reproducing apparatus 失效
标题翻译：数字信息记录重放装置
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
申请人： Hitachi, Ltd.
发明人： Amada, Nobutaka , Arai, Takao , Noguchi, Takaharu
IPC分类号： G11B20/00
CPC分类号： 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
摘要： 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.

8. 发明授权

EP0718825B1 Video signal recording apparatus and video signal recording and reproducing apparatus 失效
标题翻译：一种视频记录和再现装置
公开(公告)号：EP0718825B1
公开(公告)日：2001-03-14
申请号：EP95119989.2
申请日：1995-12-18
申请人： Hitachi, Ltd.
发明人： Amada, Nobutaka , Owashi, Hitoaki , Noguchi, Takaharu , Kumasaka, Noriyuki , Zama, Hideo
IPC分类号： G11B5/008 , G11B15/12 , G11B15/18 , G11B15/467 , G11B15/02 , H04N5/782 , H04N9/79
CPC分类号： H04N5/78213 , G11B5/0086 , G11B5/00878 , G11B15/02 , G11B15/125 , G11B15/1875 , G11B15/4671 , G11B15/4672 , G11B15/4731 , H04N5/78266 , H04N9/7921 , H04N9/8042 , H04N9/83

9. 发明公开

EP0814619A3 Magnetic recording and reproducing control apparatus 失效
标题翻译：磁记录和重放控制装置
公开(公告)号：EP0814619A3
公开(公告)日：1999-05-12
申请号：EP97109678.9
申请日：1997-06-13
申请人： HITACHI, LTD.
发明人： Hatanaka, Yuji , Ohara, Yasunori , Tachibana, Hiroaki , Yamada, Yoshio , Amada, Nobutaka , Okamoto, Hiroo
IPC分类号： H04N9/82
CPC分类号： H04N21/4147 , H04N5/9262 , H04N21/236 , H04N21/434
摘要： A magnetic recording and reproducing apparatus includes an input circuit (2, 9) for inputting the digital signal, an identification information addition circuit (16, 27) for adding recording identification information indicative of recording identification for the digital signal input through the input circuit, a recording circuit (17) for recoding the digital signal with the recording identification information on the recoding medium, a reproducing circuit (20, 21) for reproducing the content of the recording medium, an identification information detecting portion (22) for detecting the identification information from a reproduced signal (91) reproduced by the reproducing circuit for ouputting an identification information detection signal (114) indicative of detection of the identification information, a storage circuit (23) for storing the reproduced signal, a time stamp detection circuit (82) for detecting the time stamp from the reproduced signal stored in the storage circuit, an output control circuit (26) for generating a timing for reading the reproduced signal from the storage circuit on the basis of the time stamp detected by the time stamp detection circuit, a reset circuit (27) for resetting the output control circuit in response to at least the identification information detection signal, and an output circuit (21) for outputting the reproduced signal read from the storage circuit, the identification information addition circuit adding the recording identification information to the digital signal for a given period where the recording circuit initiating recording on the recording medium, and the reset circuit resetting the at least the control circuit upon detection of the recording identification information from the identification information detecting circuit.

10. 发明授权

EP0222386B1 Method and apparatus for PCM recording and reproducing audio signal 失效
标题翻译： PCM记录和再现音频信号的方法和装置
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
申请人： HITACHI, LTD.
发明人： Arai, Takao , Kobayashi, Masaharu , Amada, Nobutaka , Yumde, Yasufumi , Takahashi, Hiroaki
IPC分类号： G11B20/18 , G11B20/10
CPC分类号： H04N5/928 , G11B20/10527 , G11B20/1809 , G11B2020/1087

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