Patents by Inventor Nobutaka Amada
Nobutaka Amada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6429985Abstract: A digital information recording apparatus having a first recording mode recording a first digital information signal of a first information rate on a magnetic tape and a second recording mode recording a second digital information signal of a second information rate on the magnetic tape. The apparatus includes a circuit which when the second information rate is less than 1/N times the first information rate (N is an integer ≧2), adds a dummy signal to the second digital information signal to make the recording rate of the second digital information signal substantially equal to the recording rate of the first digital information signal and a circuit which multiplexes identification signals for identifying the first and the second digital information signals or the first and the second recording rates on the first or the second digital information signal, for recording.Type: GrantFiled: May 9, 2001Date of Patent: August 6, 2002Assignee: Hitachi, Ltd.Inventors: Nobutaka Amada, Takaharu Noguchi, Takao Arai
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Publication number: 20020102096Abstract: An apparatus for recording and reproducing a digital video signal on and from a common recording medium by using the head configuration common to the conventional one while maintaining exchangeability with the current analog VTR. An analog video and audio signals are recorded and reproduced on and from an video track and an underlying deep-layer track, respectively, by means of magnetic heads and magnetic heads. On the other hand, a digital video and audio signal is recorded and reproduced on and from two adjacent tracks by means of the magnetic heads for analog audio recording. During reproduction, an identification signal generating circuit generates an identification signal for discriminating a recorded signal, and a control signal is PWM modulated with the identification signal and recorded on a control track by means of a magnetic head.Type: ApplicationFiled: December 13, 2001Publication date: August 1, 2002Applicant: Hitachi, Ltd.Inventors: Nobutaka Amada, Hitoaki Owashi, Takaharu Noguchi, Noriyuki Kumasaka, Hideo Zama
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Patent number: 6388831Abstract: The present invention relates to an information providing system. More particularly, this invention relates to an information management apparatus capable of reliable management of distributed information and an information providing system employing the same information management apparatus. The information management apparatus comprises a main information reproducing means for reproducing main information recorded in a given recording medium; and a reproduction management means for managing the main information reproducing means for reproducing the main information. The present invention provides a receiving means provided with a means for recording distributed information and control information limiting the number of main information reproducing cycles on a recording medium, and a main information reproducing means provided with a reproduction disabling means for limiting the reproduction of main information.Type: GrantFiled: August 22, 2000Date of Patent: May 14, 2002Assignee: Hitachi, Ltd.Inventors: Hiroaki Ono, Kiyoshi Kano, Hideo Nishijima, Takao Arai, Takaharu Noguchi, Nobutaka Amada, Hiroo Okamoto, Hitoaki Owashi, Keizo Nishimura, Nobuyuki Kaku, Shinya Fujimori
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Publication number: 20020051310Abstract: The present invention relates to an information providing system. More particularly, this invention relates to an information management apparatus capable of reliable management of distributed information and an information providing system employing the same information management apparatus. The information management apparatus comprises a main information reproducing means for reproducing main information recorded in a given recording medium; and a reproduction management means for managing the main information reproducing means for reproducing the main information. The present invention provides a receiving means provided with a means for recording distributed information and control information limiting the number of main information reproducing cycles on a recording medium, and a main information reproducing means provided with a reproduction disabling means for limiting the reproduction of main information.Type: ApplicationFiled: December 20, 2001Publication date: May 2, 2002Inventors: Hiroaki Ono, Kiyoshi Kano, Hideo Nishijima, Takao Arai, Takaharu Noguchi, Nobutaka Amada, Hiroo Okamoto, Hitoaki Owashi, Keizo Nishimura, Nobuyuki Kaku, Shinya Fujimori
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Patent number: 6363210Abstract: A communication system has an analog signal broadcasting station for transmitting an analog signal, a digital signal broadcasting station for transmitting a digital signal and a receiving unit for receiving the analog signal from the analog signal broadcasting station and the digital signal from the digital signal broadcasting station. The receiving unit has a recording and reproducing unit for selectively recording one of received analog and digital signals. The recording and reproducing unit has heads for analog signal each having a predetermined azimuth angle and operative to record an analog signal and heads for digital signal each having an azimuth angle larger than that of the analog signal head and operative to record a digital signal, and performs selective recording and reproduction of the analog signal and the digital signal on and from a recording medium.Type: GrantFiled: March 17, 1999Date of Patent: March 26, 2002Assignee: Hitachi, Ltd.Inventors: Hitoaki Owashi, Takaharu Noguchi, Hiroo Okamoto, Kyoichi Hosokawa, Kazuhiko Yoshizawa, Nobutaka Amada, Naozumi Sugimura, Hiroaki Tachibana, Hiroyuki Hayakawa
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Patent number: 6349012Abstract: A magnetic recording and/or reproducing apparatus has compatibility with a conventional analog signal recording/reproducing VTR and can realize an operation mode in which a digital signal is recorded and/or reproduced. During N-times long time recording, the travel speed of a magnetic recording medium is set to 1/N of that during normal recording to perform recording every N scanning operations of a rotary head and during N-times long time reproduction, the travel speed of the magnetic recording medium is set to 1/N of that during normal recording and the travel of the magnetic recording medium is controlled such that the level of a reproduction signal reproduced every N scanning operations of the rotary head at a predetermined timing is maximized so as to reproduce a reproduction signal at that timing.Type: GrantFiled: February 1, 1999Date of Patent: February 19, 2002Assignee: Hitachi, Ltd.Inventors: Hiroo Okamoto, Nobutaka Amada, Hideo Nishijima, Shigeru Yamazaki
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Patent number: 6339676Abstract: An apparatus for recording and reproducing a digital video signal on and from a common recording medium by using the head configuration common to the conventional one while maintaining exchangeability with the current analog VTR. An analog video and audio signals are recorded and reproduced on and from an video track and an underlying deep-layer track, respectively, by means of magnetic heads and magnetic heads. On the other hand, a digital video and audio signal is recorded and reproduced on and from two adjacent tracks by means of the magnetic heads for analog audio recording. During reproduction, an identification signal generating circuit generates an identification signal for discriminating a recorded signal, and a control signal is PWM modulated with the identification signal and recorded on a control track by means of a magnetic head.Type: GrantFiled: April 19, 2000Date of Patent: January 15, 2002Assignee: Hitachi, Ltd.Inventors: Nobutaka Amada, Hitoaki Owashi, Takaharu Noguchi, Noriyuki Kumasaka, Hideo Zama
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Publication number: 20010043415Abstract: A digital information recording-reproducing apparatus for recording and reproducing a digital information signal which includes a recording circuit for recording the digital information signal together with control information, and a reproducing circuit for detecting the recorded control information at a time the recorded digital information signal is to be reproduced, and reproducing the recorded digital information signal only if the detected control information satisfies a predetermined condition.Type: ApplicationFiled: June 19, 2001Publication date: November 22, 2001Inventors: Nobutaka Amada, Takao Arai, Takaharu Noguchi, Hiroo Okamoto, Shigeru Yamazaki
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Publication number: 20010038741Abstract: An image recording and reproducing apparatus can record and reproduce both of a digital signal and an analog signal. Operations of a broadcast receiving apparatus and a recording and reproducing apparatus are integrated and superimposition of information on an analog image is realized during recording and reproduction of a digital signal. The broadcast receiving apparatus and the recording and reproducing apparatus communicate with each other to be able to set and obtain states of the opposite apparatus, so that one of the apparatus notifies information of the other apparatus to a user and causes the user to set the information in a picture having the same form as a picture used to notify a state of one apparatus to the user and to cause the user to set the state.Type: ApplicationFiled: July 16, 2001Publication date: November 8, 2001Inventors: Yasunori Ohara, Akira Saitou, Takeo Ohkouchi, Hiroo Okamoto, Nobutaka Amada
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Publication number: 20010028520Abstract: A digital information recording apparatus having a first recording mode recording a first digital information signal of a first information rate on a magnetic tape and a second recording mode recording a second digital information signal of a second information rate on the magnetic tape. The apparatus includes a circuit which when the second information rate is less than 1/N times the first information rate (N is an integer ≧2), adds a dummy signal to the second digital information signal to make the recording rate of the second digital information signal substantially equal to the recording rate of the first digital information signal and a circuit which multiplexes identification signals for identifying the first and the second digital information signals or the first and the second recording rates on the first or the second digital information signal, for recording.Type: ApplicationFiled: May 9, 2001Publication date: October 11, 2001Inventors: Nobutaka Amada, Takaharu Noguchi, Takao Arai
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Patent number: 6292618Abstract: An image recording and reproducing apparatus can record and reproduce both of a digital signal and an analog signal. Operations of a broadcast receiving apparatus and a recording and reproducing apparatus are integrated and superimposition of information on an analog image is realized during recording and reproduction of a digital signal. The broadcast receiving apparatus and the recording and reproducing apparatus communicate with each other to be able to set and obtain states of the opposite apparatus, so that one of the apparatus notifies information of the other apparatus to a user and causes the user to set the information in a picture having the same form as a picture used to notify a state of one apparatus to the user and to cause the user to set the state.Type: GrantFiled: March 9, 1998Date of Patent: September 18, 2001Assignee: Hitachi, Ltd.Inventors: Yasunori Ohara, Akira Saitou, Takeo Ohkouchi, Hiroo Okamoto, Nobutaka Amada
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Patent number: 6249639Abstract: A digital information recording-reproducing apparatus for recording and reproducing a digital information signal which includes a recording circuit for recording the digital information signal together with control information, and a reproducing circuit for detecting the recorded control information at a time the recorded digital information signal is to be reproduced, and reproducing the recorded digital information signal only if the detected control information satisfies a predetermined condition.Type: GrantFiled: February 25, 1999Date of Patent: June 19, 2001Assignee: Hitachi, Ltd.Inventors: Nobutaka Amada, Takao Arai, Takaharu Noguchi, Hiroo Okamoto, Shigeru Yamazaki
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Patent number: 6219320Abstract: An optical disk medium to which a digital information signal modulated by using a run length limited code in which the minimum run length is d is recorded. The digital information signal is recorded at a bit rate Fb satisfying the equation Fb=K·d·Fm, wherein a cut-off frequency in frequency response of said optical disk medium is Fm, and a value of a coefficient K regarding recording density is larger than 1.Type: GrantFiled: March 27, 1998Date of Patent: April 17, 2001Assignee: Hitachi, Ltd.Inventors: Nobutaka Amada, Toshifumi Takeuchi, Takao Arai
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Patent number: 6204985Abstract: The present invention relates to an information providing system. More particularly, this invention relates to an information management apparatus capable of reliable management of distributed information and an information providing system employing the same information management apparatus. The information management apparatus comprises a main information reproducing means for reproducing main information recorded in a given recording medium; and a reproduction management means for managing the main information reproducing means for reproducing the main information. The present invention provides a receiving means provided with a means for recording distributed information and control information limiting the number of main information reproducing cycles on a recording medium, and a main information reproducing means provided with a reproduction disabling means for limiting the reproduction of main information.Type: GrantFiled: January 14, 2000Date of Patent: March 20, 2001Assignee: Hitachi, Ltd.Inventors: Hiroaki Ono, Kiyoshi Kano, Hideo Nishijima, Takao Arai, Takaharu Noguchi, Nobutaka Amada, Hiroo Okamoto, Hitoaki Owashi, Keizo Nishimura, Nobuyuki Kaku, Shinya Fujimori
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Patent number: 6195499Abstract: A magnetic recording and/or reproducing apparatus having a plurality of recording/reproducing modes, such as a long-time recording/reproducing mode and a high rate recording/reproducing mode for digital signals, is intended to form an ideal recording pattern for any head configuration.Type: GrantFiled: September 20, 1999Date of Patent: February 27, 2001Assignee: Hitachi, Ltd.Inventors: Nobutaka Amada, Hiroo Okamoto, Hideo Nishijima, Hideo Zama, Kuniaki Hirayama
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Patent number: 6104862Abstract: An apparatus for recording and reproducing a digital video signal on and from a common recording medium by using the head configuration common to the conventional one while maintaining exchangeability with the current analog VTR. An analog video and audio signals are recorded and reproduced on and from an video track and an underlying deep-layer track, respectively, by means of magnetic heads and magnetic heads. On the other hand, a digital video and audio signal is recorded and reproduced on and from two adjacent tracks by means of the magnetic heads for analog audio recording. During reproduction, an identification signal generating circuit generates an identification signal for discriminating a recorded signal, and a control signal is PWM modulated with the identification signal and recorded on a control track by means of a magnetic head.Type: GrantFiled: December 7, 1995Date of Patent: August 15, 2000Assignee: Hitachi, Ltd.Inventors: Nobutaka Amada, Hitoaki Owashi, Takaharu Noguchi, Noriyuki Kumasaka, Hideo Zama
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Patent number: 6085023Abstract: A magnetic recording and reproducing apparatus includes an input circuit for inputting the digital signal, an identification information addition circuit for adding recording identification information indicative of recording identification for the digital signal input through the input circuit, a recording circuit for recoding the digital signal with the recording identification information on the recoding medium, a reproducing circuit for reproducing the content of the recording medium, an identification information detecting portion for detecting the identification information from a reproduced signal reproduced by the reproducing circuit for ouputting an identification information detection signal indicative of detection of the identification information, a storage circuit for storing the reproduced signal, a time stamp detection circuit for detecting the time stamp from the reproduced signal stored in the storage circuit, an output control circuit for generating a timing for reading the reproduced signalType: GrantFiled: June 23, 1997Date of Patent: July 4, 2000Assignee: Hitachi, Ltd.Inventors: Yuji Hatanaka, Yasunori Ohara, Hiroaki Tachibana, Yoshio Yamada, Nobutaka Amada, Hiroo Okamoto
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Patent number: 6031677Abstract: The present invention relates to an information providing system. More particularly, this invention relates to an information management apparatus capable of reliable management of distributed information and an information providing system employing the same information management apparatus. The information management apparatus comprises a main information reproducing means for reproducing main information recorded in a given recording medium; and a reproduction management means for managing the main information reproducing means for reproducing the main information. The present invention provides a receiving means provided with a means for recording distributed information and control information limiting the number of main information reproducing cycles on a recording medium, and a main information reproducing means provided with a reproduction disabling means for limiting the reproduction of main information.Type: GrantFiled: July 30, 1998Date of Patent: February 29, 2000Assignee: Hitachi, Ltd.Inventors: Hiroaki Ono, Kiyoshi Kano, Hideo Nishijima, Takao Arai, Takaharu Noguchi, Nobutaka Amada, Hiroo Okamoto, Hitoaki Owashi, Keizo Nishimura, Nobuyuki Kaku, Shinya Fujimori
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Patent number: 5930274Abstract: An information recording and reproduction apparatus for recording and reproducing the information supplied through the transmission line is capable of protecting the copyright by limiting the reproduction of the recorded information. A main information signal supplied through the transmission line and a deadline signal attached to the main information signal and representing the reproduction deadline of the main information signal are recorded and reproduced by a recording device and a reproduction device respectively. A temporal information signal representing the date and time is acquired. The deadline signal reproduced is compared with the temporal information signal acquired. The reproduction output of the main information signal is cut off in accordance with the comparison signal produced by the comparison. In the case where the temporal information has passed the deadline, the reproduction output of the main information signal is cut off.Type: GrantFiled: August 27, 1997Date of Patent: July 27, 1999Assignee: Hitachi, Ltd.Inventors: Kouji Kaniwa, Hideo Nishijima, Nobutaka Amada, Hiroo Okamoto, Takaharu Noguchi, Hiroaki Ono, Hitoaki Owashi, Takao Arai, Hiroya Abe, Kouji Minabe
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Patent number: 5912969Abstract: An apparatus comprising a transmission system for transmitting an information signal, and a reception system including an information receiving unit for receiving the information signal, and an information recording/reproducing unit for recording/reproducing the received information signal on/from a recording medium.Type: GrantFiled: December 18, 1997Date of Patent: June 15, 1999Assignee: Hitachi, Ltd.Inventors: Manabu Sasamoto, Nobutaka Amada, Takao Arai, Takaharu Noguchi, Hitoaki Owashi, Hideo Nishijima, Hiroaki Ono, Hiroo Okamoto