Hitachi, Ltd.

Other

Samsung Electronics Co., Ltd.

Fipa Frohwitter Intellectual Property Ag

Nobutaka Amada

Takao Arai

Takaharu Noguchi

Hiroo Okamoto

Hitoaki Owashi

Hideo Nishijima

Hiroaki Ono

Keizo Nishimura

Shigeru Yamazaki

Toshifumi Takeuchi

Nobuyuki Kaku

Kiyoshi Kano

Shinya Fujimori

Kyoichi Hosokawa

Harushige Nakagaki

Yasunori Ohara

Masaharu Kobayashi

Shigeki Inoue

Hideo Zama

Hiroaki Tachibana

Takeo Ohkouchi

Akira Saitou

Kazuhiko Yoshizawa

Noriyuki Kumasaka

Naozumi Sugimura

Kuniaki Miura

Kouji Minabe

Kouji Kaniwa

Tohru Sampei

Yuji Hatanaka

Hiroya Abe

Yasufumi Yumde

Hiroyuki Hayakawa

Hiroyuki Kimura

Hideaki Suzuki

Seiichi Saito

Susumu Yoshida

Manabu Sasamoto

Masaki Noda

Hiroaki Takahashi

Keiro Shinkawa

Yoshimi Iso

Tsutomu Noda

Kuniaki Hirayama

Akinori Maeda

Tatsuo Baba

Masami Nishida

Yasufumi Yunde

Yoshio Yamada

Kouei Usuda

Akira Abeta

A digital information recording-reproducing apparatus which records and reproduces a digital information signal transmitted together with an additional information includes a discriminator which discriminates a type of the digital information signal based on the additional information, a recorder which generates control information based on the additional information, adds the control information to the digital information signal, and records the digital information signal having the control information added thereto, a reproducer which reproduces the recorded digital information signal recorded by the recorder, and a controller which controls reproduction based on the control information. When the discriminator discriminates the type of the digital information signal as being a specific type and the digital information signal is recorded by the recorder, the reproducer reproduces the digital information signal.

Digital information recording-reproducing apparatus

An information management apparatus capable of reliable management of distributed information and an information providing system employing the same information management apparatus has a main information reproducing system for reproducing main information recorded in a given recording medium; and a reproduction management system for managing the main information reproducing system for reproducing the main information. A receiver is provided with a unit for recording distributed information and control information limiting the number of main information reproducing cycles on a recording medium, and a main information reproducing system provided with a reproduction disabling function for limiting the reproduction of main information.

Information management apparatus

An image recording and reproducing apparatus can record and reproduce both 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 causes the user to set the state.

Image recording and reproducing apparatus

A digital information recording-reproducing apparatus for recording 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.

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.

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.

In a digital information recording and reproducing apparatus of a rotary magnetic head type for selecting and recording a plurality of digital information signals having different transmission rates and for selectively reproducing the recorded signal, a high-rate digital information signal and a low-rate digital information signal are inputted for selection of either one thereof to be converted by a recording-system encoder into two channels of recording signals. When recording the high-rate signal, the rotary drum is turned at a rotation speed and the magnetic tape is fed at a feed speed (V ) to conduct 4-track azimuth recording of the signals for each rotation of the rotary drum by the first to fourth magnetic heads. To record the low-rate signal, the rotary drum is turned at a rotation speed substantially equal to the first rotation speed and the magnetic tape is fed at a feed speed almost equal to (V /N) so as to achieve 4-track azimuth recording of record signals compressed on a time axis to 1/N of the original signals for every N rotations of the rotary drum by the magnetic heads. A reproducing system receives two channels of signals reproduced by the first to fourth magnetic heads and conducts for the signals such processes reverse to those of the encoding process of the recording system.

Apparatus for recording and reproducing digital information signals of different transmission rates

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 &gE;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.

Digital information recording apparatus and digital information recording and reproducing apparatus

An object of the present invention is to provide a digital signal recording method and a digital signal recording apparatus, capable of readily producing a signal used to reproduce in a trick play mode from a digital compression video signal. The above-described object of the present invention may be achieved by such a digital video signal recording method for recording a first compression frame signal compressed without using a correlation between frames, and a digital compression video signal having preselected bytes of a packet format constituted by a second compression frame signal compressed with using the correlation between the frames, in which a third signal made of a packet containing the first compression frame signal is produced, and then is recorded in combination with the packet of the digital compression signal.

Digital video signal recording/reproducing method and apparatus

Apparatus and method for limiting the reproduction of main information

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.

Communication system for encrypted data and apparatus for selectively recording and reproducing received analog signal and received digital signal

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.

Magnetic recording and/or reproducing apparatus

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.

Video signal recording and reproducing apparatus compatible with analog and digital video signal recording and reproducing

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. Further, before information is superimposed on an analog image signal, a signal conforming in phase to a reference signal of a digital signal is produced in a servo circuit and a reference signal of an analog image signal is supplied to an analog OSD circuit during superimposition of information. At the same time, a reference signal used in the servo circuit is changed over to the reference signal produced in the servo circuit. Thus, the user's operation is simplified.

Growing community of inventors

Yokohama, Japan

Nobutaka Amada