专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP0675655A3 Method and system for transsion/reception of encrypted digital signal 失效
标题翻译：用于发送/接收加密的数字信号的方法和装置。
公开(公告)号：EP0675655A3
公开(公告)日：1997-09-24
申请号：EP95104480.9
申请日：1995-03-27
申请人： HITACHI, LTD.
发明人： Amada, Nobutaka , Yamazaki, Shigeru , Noguchi, Takaharu , Nishijima,Hideo , Ono, Hiroaki , Okamoto, Hiroo , Owashi, Hitoaki , Arai, Takao , Hatanaka, Yuji , Saito, Seiichi
IPC分类号： H04N7/52
CPC分类号： H04N7/52 , H04N5/9261 , H04N5/937
摘要： A digital information signal transmitting/receiving method and system having a transmitter (100) for transmitting an encrypted digital information signal and a plurality of receivers (200) for receiving the encrypted digital information signal from the transmitter (100). The transmitter (100) simultaneously distributes a plurality of identification codes associated with the receivers (200) ahead of the digital information signal. Then, the digital information signal is distributed to the receivers. The receivers (200) detect particular, or their own, identification codes from the plurality of identification signals assigned to the receivers (200). The received encrypted digital information signal is decrypted into the original information on the basis of the particular identification codes associated with the corresponding receivers or the recorders (300). Either the receivers (200) or the recorders (300) generate an information request signal. The transmitter (100) is responsive to this information request signal to add to the digital information signal identification signals for identifying the receivers (200) or the recorders (300) which generated the information request signal. The recorders (300) control the received information signal to be recorded in response to the identification signals received by the receivers (200).

2. 发明公开

EP0735536A2 Digital signal recording method and apparatus 失效
标题翻译： Verfahren undGerätzur Aufnahme von Digitalsignalen
公开(公告)号：EP0735536A2
公开(公告)日：1996-10-02
申请号：EP96104729.7
申请日：1996-03-25
申请人： HITACHI, LTD.
发明人： Okamoto, Hiroo , Hosokawa, Kyoichi , Owashi, Hitoaki , Noguchi, Takaharu
IPC分类号： G11B20/10 , G11B20/18 , H04N9/804
CPC分类号： H04N5/9261 , G11B20/10009 , G11B20/1833
摘要： A digital signal recording method and apparatus for recording a digital signal on a recording medium (111) by dividing the digital signal at intervals of a certain byte number, adding to each of the divided signals a synchronizing signal, a control signal including block address information, and an error detection and correction code to form signal blocks, and precoding each of the signal blocks in order to detect a partial response. Before the precode processing, the digital signal and the error detection and correction code are scrambled (303) on the basis of the control signal, and the control signal is inverted (301).
摘要翻译：一种数字信号记录方法和装置，用于通过以某个字节数的间隔划分数字信号将数字信号记录在记录介质上，将每个分割信号加到同步信号，包括块地址信息的控制信号以及用于形成信号块的错误检测和校正码，并且对每个信号块进行预编码以便检测部分响应。在预编码处理之前，数字信号和错误检测和校正码根据控制信号进行加扰（303），控制信号反转（301）。

3. 发明授权

EP0077567B1 Modulator-demodulator for obtaining and demodulating frequency-modulated signal 失效
标题翻译：用于获取和调制频率调制信号的调制解调器
公开(公告)号：EP0077567B1
公开(公告)日：1992-01-08
申请号：EP82109642.7
申请日：1982-10-19
申请人： Hitachi, Ltd.
发明人： Ito, Shigeyuki , Watatani, Yoshizumi , Owashi, Hitoaki
IPC分类号： H03C3/00 , H03D3/24 , H04N5/92
CPC分类号： H03D3/241 , H03C3/00 , H04N9/802

4. 发明公开

EP0138164A3 Method and apparatus for sampling and processing a video signal 失效
标题翻译：用于采样和处理视频信号的方法和装置
公开(公告)号：EP0138164A3
公开(公告)日：1988-01-13
申请号：EP84111904
申请日：1984-10-04
申请人： HITACHI, LTD.
发明人： Furuhata, Takashi , Owashi, Hitoaki , Hibi, Michio
IPC分类号： H04N05/91 , H04N05/95 , H04N09/89 , H04N05/93
CPC分类号： H04N5/932 , H04N9/896
摘要： Method and apparatus for sampling, quantizing and processing a video signal having a time base fluctuation with sampling clock pulses produced from an oscillator (14). A horizontal synchronous signal is separated from the video signal by a separator (12). The oscillator (14) is instantaneously phase-synchronized with the horizontal synchronous signal, so that the oscillator produces sampling clock pulses having the same time base fluctuation as the video signal. An oscillating frequency of the oscillator is stabilized by phase-comparing the sampling clock pulses with a reference signal from a crystal oscillator and controlling the oscillating frequency in response to a phase error signal thereof during a vertical blanking period of the video signal.

5. 发明公开

EP1534020A2 Method/apparatus for receiving and/or reproducing digital signal 失效
标题翻译：为数字信号的接收和/或再现方法和装置
公开(公告)号：EP1534020A2
公开(公告)日：2005-05-25
申请号：EP05003744.9
申请日：1996-04-24
申请人： Hitachi, Ltd.
发明人： Owashi, Hitoaki , Okamoto, Hiroo , Hosokawa, Kyoichi , Noguchi, Takaharu
IPC分类号： H04N9/804
CPC分类号： H04N5/85 , G11B20/0084 , H04B7/18523 , H04N5/4401 , H04N5/77 , H04N5/913 , H04N7/165 , H04N9/8042 , H04N21/234318 , H04N21/2543 , H04N21/4147 , H04N21/4305 , H04N21/4307 , H04N21/4331 , H04N21/4334 , H04N21/4345 , H04N21/4367 , H04N21/43853 , H04N21/4405 , H04N21/44204 , H04N21/4623 , H04N21/47208 , H04N21/8355 , H04N21/8547 , H04N2005/91364
摘要： An apparatus (52) is provided for receiving (210) a digital signal comprising a plurality of time-division multiplexed digital programs (160-163) with discrimination information and quide information describing the contents of said plurality of programs. The apparatus includes a program selector (230) for selecting a program from the plurality of programs based on the discrimination information, data former (290) which forms guide information regarding the selected program from the received guide information and output means (203) connected to a recording/recording device (53) which outputs the selected program with its related guide information.
摘要翻译：一种装置（52）被设置用于接收（210）的数字信号，其包括的时分多路复用数字节目与辨别信息和quide信息描述的节目，所述多个中的内容有多个（160-163）。该设备包括用于基于所述识别信息从程序多元选择程序的程序选择器（230），数据前（290），其形成引导信息关于所选择的从所接收的引导信息和输出装置（203），连接到节目记录/记录装置（53）所选择节目与它的相关信息引导输出。

6. 发明公开

EP0740478A2 Method and apparatus for receiving and/or reproducing digital signals 无效
标题翻译：用于接收和/或重放数字信号的方法和装置
公开(公告)号：EP0740478A2
公开(公告)日：1996-10-30
申请号：EP96106436.7
申请日：1996-04-24
申请人： HITACHI, LTD.
发明人： Owashi, Hitoaki , Okamoto, Hiroo , Hosokawa, Kyoichi , Noguchi, Takaharu
IPC分类号： H04N9/804
CPC分类号： H04N5/85 , G11B20/0084 , H04B7/18523 , H04N5/4401 , H04N5/77 , H04N5/913 , H04N7/165 , H04N9/8042 , H04N21/234318 , H04N21/2543 , H04N21/4147 , H04N21/4305 , H04N21/4307 , H04N21/4331 , H04N21/4334 , H04N21/4345 , H04N21/4367 , H04N21/43853 , H04N21/4405 , H04N21/44204 , H04N21/4623 , H04N21/47208 , H04N21/8355 , H04N21/8547 , H04N2005/91364
摘要： A method and apparatus is provided for receiving and/or reproducing a digital signal, capable of efficiently recording a compressed, packeted digital signal (170-173) and inhibiting a copy thereof. An input packet signal is added (Fig. 9) with a time stamp indicating a relative time of an arrival of the packet, and the packet signals of digital information with the added time stamps are recorded at reduced intervals (Fig. 8(3)) therebetween. In reproducing, a packet interval adjusting circuit (Fig. 11) restores the original packet intervals in accordance with the time stamps, and then a time stamp change circuit (Fig. 9) changes at least one bit of the time stamp and thereafter outputs the digital information.
摘要翻译：提供了一种用于接收和/或重放数字信号的，能够记录一个压缩的高效，包装的数字信号（170-173）和它们的复制抑制的方法和装置。输入分组信号的3加入（图9）与时间戳指示该分组的到达的相对时间，和数字信息与所添加的时间戳的分组信号在降低的间隔（记录图8（））之间存在。再现，数据包间隔调整电路（图11）中恢复雅舞蹈原始数据包间隔与所述时间戳，然后时间戳改变电路（图9）改变的时间戳中的至少一个比特，然后输出该数字信息。

7. 发明公开

EP0675655A2 Method and system for transsion/reception of encrypted digital signal 失效
标题翻译：用于发送/接收加密的数字信号的方法和装置。
公开(公告)号：EP0675655A2
公开(公告)日：1995-10-04
申请号：EP95104480.9
申请日：1995-03-27
申请人： HITACHI, LTD.
发明人： Amada, Nobutaka , Yamazaki, Shigeru , Noguchi, Takaharu , Nishijima,Hideo , Ono, Hiroaki , Okamoto, Hiroo , Owashi, Hitoaki , Arai, Takao , Hatanaka, Yuji , Saito, Seiichi
IPC分类号： H04N7/52
CPC分类号： H04N7/52 , H04N5/9261 , H04N5/937
摘要： A digital information signal transmitting/receiving method and system having a transmitter (100) for transmitting an encrypted digital information signal and a plurality of receivers (200) for receiving the encrypted digital information signal from the transmitter (100). The transmitter (100) simultaneously distributes a plurality of identification codes associated with the receivers (200) ahead of the digital information signal. Then, the digital information signal is distributed to the receivers. The receivers (200) detect particular, or their own, identification codes from the plurality of identification signals assigned to the receivers (200). The received encrypted digital information signal is decrypted into the original information on the basis of the particular identification codes associated with the corresponding receivers or the recorders (300). Either the receivers (200) or the recorders (300) generate an information request signal. The transmitter (100) is responsive to this information request signal to add to the digital information signal identification signals for identifying the receivers (200) or the recorders (300) which generated the information request signal. The recorders (300) control the received information signal to be recorded in response to the identification signals received by the receivers (200).
摘要翻译：的数字信息信号发送/接收方法和具有用于发送到加密的数字信息信号的发射器（100）和接收器，用于从发送器（100）接收加密的数字信息信号中的多个（200）系统。发射机（100）同时分配的与所述接收器（200）前方的数字信息信号的相关联的识别码的多元性。然后，数字信息信号被分发到接收器。接收器（200）检测特定的，或自己的，识别代码从分配给所述接收器（200）识别信号的多元性。所接收到的加密的数字信息信号被解密成与相应的接收器或记录器（300）相关联的特定识别码的基础上，原始信息。任一接收器（200）或记录器（300），以产生信息请求信号。发射机（100）响应于该信息请求信号添加到数字信息信号的识别信号用于识别所述接收器（200）或所生成的信息请求信号记录器（300）。记录器（300）控制所述接收的信息信号被记录在响应于由所述接收器（200）接收到的识别信号。

8. 发明授权

EP0421486B1 Skew error correction circuit for video signal reproducing apparatus 失效
标题翻译： Skewfehlerkorrekturschaltung用于视频信号再现装置。
公开(公告)号：EP0421486B1
公开(公告)日：1995-05-03
申请号：EP90121106.0
申请日：1985-06-25
申请人： HITACHI, LTD.
发明人： Furuhata, Takashi , Owashi, Hitoaki , Hibi, Michio
IPC分类号： H04N9/89 , H04N5/93
CPC分类号： H04N9/896 , H04N5/932

9. 发明公开

EP0168834A2 Video signal recording and reproducing method and apparatus 失效
标题翻译：用于记录和再现视频信号的方法和装置。
公开(公告)号：EP0168834A2
公开(公告)日：1986-01-22
申请号：EP85108996.1
申请日：1985-07-18
申请人： HITACHI, LTD.
发明人： Yoshioka, Atsushi , Furuhata, Takashi , Owashi, Hitoaki , Mouri, Katsuo
IPC分类号： H04N5/92
CPC分类号： H04N9/896 , H04N5/78266 , H04N5/92
摘要： In a rotary magnetic head helical scan type video tape recorder using a segment recording system, a video signal of one vertical scanning period is divided into n video signal blocks (V), where n is an integer equal to or larger than 2, and a redundant period (V-BLK) having a predetermined period is inserted into the video signal blocks (V) in a recording mode. Each of the video signal blocks (V) has a number of horizontal scanning lines equal or smaller than N/n, where N is the number of the horizontal scanning lines in a field of the video signal. In a reproducing mode, a time axis error of reproduced series of the video signal blocks (V) is corrected at least during the redundant periods (V-BLK). Then, the corrected blocks are converted into the original video signal.

10. 发明公开

EP0077567A2 Modulator-demodulator for obtaining and demodulating frequency-modulated signal 失效
标题翻译：调制器 - 解调器，用于产生和解调频率调制信号。
公开(公告)号：EP0077567A2
公开(公告)日：1983-04-27
申请号：EP82109642.7
申请日：1982-10-19
申请人： Hitachi, Ltd.
发明人： Ito, Shigeyuki , Watatani, Yoshizumi , Owashi, Hitoaki
IPC分类号： H03C3/00 , H03D3/24 , H04N5/92
CPC分类号： H03D3/241 , H03C3/00 , H04N9/802
摘要： modulator-demodulator suited to record an audio signal in a recording medium in the form of a frequency-modulated signal and to demodulate the frequency-modulated signal is disclosed. It includes a voltage-controlled oscillator (4,4', 4a, 4b), a switching circuit (28, 28', 28a, 28b) for changing one of two input frequency-modulated signals toward a control input of the voltage-controlled oscillator, and a phase detector (10) for detecting a difference in phase between the frequency-modulated signal reproduced from the recording medium and the output signal of the voltage-controlled oscillator. In a recording operation, an input audio signal is supplied to a control signal input terminal of the voltage-controlled oscillator (VCO) through the switching circuit, and the VCO acts as a modulator for carrying out frequency modulation. In a reproducing operation, the output signal of the phase detector is supplied to the control signal input terminal of the VCO through the switching circuit to form a demodulator having a phase locked loop configuration, and the frequency-modulated signal reproduced from the recording medium is demodulated by the demodulator. A single VCO is used as the VCO for forming the modulator in the recording operation, and is used as the VCO for forming the demodulator having the phase locked loop configuration in the reproducing operation.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式