Abstract: When a vehicle moves into a radar prohibited area preset for the neighborhood of a facility that suffers adverse effects from radar waves, emission of radar waves is stopped, and a voice guidance such as “Radar monitoring is stopped” is sent to a speaker via a voice output unit. Moreover, during a period in which a vehicle is located in a radar prohibited area, an icon that indicates that a radar is being stopped, a mark that indicates an institution for which the radar prohibited area is set, and the scope of the radar prohibited area are displayed on a map image.

Abstract: When a vehicle moves into a radar prohibited area preset for the neighborhood of a facility that suffers adverse effects from radar waves, emission of radar waves is stopped, and a voice guidance such as “Radar monitoring is stopped” is sent to a speaker via a voice output unit. Moreover, during a period in which a vehicle is located in a radar prohibited area, an icon that indicates that a radar is being stopped, a mark that indicates an institution for which the radar prohibited area is set, and the scope of the radar prohibited area are displayed on a map image.

Abstract: A method for communication among mobile units and vehicular communication apparatus make it possible to automatically establish connection with a party who can provide required information on the basis of an environment or condition change of a driver or a vehicle or in response to a driver's request so as to permit communication with the party. An inter-vehicle communication apparatus of a vehicle acquires information from other mobile units through physical networks while it is moving or stopped, and registers, in a member table, mobile units satisfying predetermined conditions on the basis of the acquired information as the members of different virtual logic networks according to the conditions. In such a state, the inter-vehicle communication apparatus selects one virtual logic network from among a plurality of virtual logic networks on the basis of an environment or condition change of a driver or a vehicle or in response to a driver's request so as to permit communication with the party.

Abstract: Media for videophone communication, media for communication navigation, media for i-mode packet communication, and media for handling video data as streaming data are linked to a server so that the server can receive data from the media of each type. A user of data of different types of communication specifications performs communication by using an information terminal (e.g., in a vehicle) so as to simultaneously capture data of the different types from the server. The server converts the data of the different types into data in accordance with a single (e.g., H.323 or H.324) communication protocol, and adds codes to each type of data. The type of data is re-divided depending on a predetermined data amount for each data item, and numbers are sequentially added to the divided data segments. The divided data segments are rearranged and transmitted. The user performs a reverse process to restore the original data for use as an output.

Abstract: A method for communication among mobile units and vehicular communication apparatus make it possible to automatically establish connection with a party who can provide required information on the basis of an environment or condition change of a driver or a vehicle or in response to a driver's request so as to permit communication with the party. An inter-vehicle communication apparatus of a vehicle acquires information from other mobile units through physical networks while it is moving or stopped, and registers, in a member table, mobile units satisfying predetermined conditions on the basis of the acquired information as the members of different virtual logic networks according to the conditions. In such a state, the inter-vehicle communication apparatus selects one virtual logic network from among a plurality of virtual logic networks on the basis of an environment or condition change of a driver or a vehicle or in response to a driver's request so as to permit communication with the party.

Abstract: Media for videophone communication, media for communication navigation, media for i-mode packet communication, and media for handling video data as streaming data are linked to a server so that the server can receive data from the media of each type. A user of data of different types of communication specifications performs communication by using an information terminal (e.g., in a vehicle) so as to simultaneously capture data of the different types from the server. The server converts the data of the different types into data in accordance with a single (e.g., H.323 or H.324) communication protocol, and adds codes to each type of data. The type of data is re-divided depending on a predetermined data amount for each data item, and numbers are sequentially added to the divided data segments. The divided data segments are rearranged and transmitted. The user performs a reverse process to restore the original data for use as an output.

Abstract: A method and apparatus allows a data tuner to communicate information. An identifier of the frequency used to transmit the data may be transmitted by a control center to a receiver coupled to the data tuner to notify a user to tune to that frequency to receive the data. The data tuner may transmit a frequency identifier to the control center to instruct the control center which frequency to use to broadcast the data. This frequency may be the frequency to which a user is already tuned, or a frequency meeting certain criteria, such as one having reception exceeding a threshold amount. The data tuner may scan header information provided by several frequencies to identify a frequency meeting certain criteria. The data tuner may provide information to a control center using a transmitter coupled to the data tuner in response to requests for information received by the data tuner.

Abstract: A broadcast transmitting and receiving system includes a receiver having multiple tuners. A data tuner receives a data stream indicating the type of programming being broadcast by one or more stations. Based on information in the data stream, the frequency of operation of a sound tuner is adjusted to provide the user with a desired type of programming. Various modes of operation are provided, some employing a user interface and others being operable without user intervention.

Abstract: A magneto-optical disk according to the present invention has a transmission directory and a reception directory. An image to be transmitted is stored under the transmission directory as a single file, while a received image is stored under the reception directory as a single file. The operator designates a desired file stored under each of the directories for printing or transmission.

Abstract: A system for transmitting a main channel signal, a first subcarrier signal, and a second subcarrier signal includes a control signal generator for producing a control signal in response to the amplitude of the main channel signal and the first subcarrier signal, a modulator coupled to the control signal generator and generating the second subcarrier signal, a voltage controlled amplifier for providing the second subcarrier signal at an injection level that varies with the control signal, and a transmitter for transmitting the second subcarrier signal at the varying injection level.

Abstract: An information processing method and system in which coded or incomplete information is transmitted through a space or through a predetermined transmission line and is received by a user. A program or data needed to demodulate the information is read out from a recording medium, and the received information is demodulated using the read out program or data.

Abstract: A magnetic head drive device is provided with a magnetic head for generating a magnetic field, a pair of switching elements for switching a current flow direction in the magnetic head, and auxiliary coils respectively connected serially to the switching elements. The current in the magnetic head is controlled by on/off operations of the paired switching elements so as to generate a magnetic field modulated according to an information signal to be recorded. Additional switching elements are serially connected to the auxiliary coils, respectively. In magnetic field modulation recording, the additional switching elements are maintained in the on-state while the modulated magnetic field is generated by the on/off operations of the paired switching elements.

Abstract: A broadcast system includes a device to compare program material to be transmitted with a database of known material, and to transmit along with the program material data corresponding to that program material. A corresponding receiving system stores the data in memory and displays, at the selection of the user, the data corresponding to the program material. The user selectively stores the data on a magnetic recording card for electronic coupon or other uses. Various modes of operation are selectable by the user, and the data may be used as electronic coupons, or to control attached equipment, or to sound alarms, or for other applications. Broadcast of the associated data commences earlier than that of the program material so that such data are available for display on a receiver when the program material is first received. The receiver is connectable to remote terminals for the collection of information relating to a user's pattern of storing and accessing the broadcast data.

Abstract: A magneto-optical recording method is disclosed. A first recording domain is formed by the application of light having a predetermined energy level to a magneto-optical recording medium. A portion of the first recording domain is erased to thereby form a second recording domain having a crescent shape by the application of light having an energy level less than the predetermined energy level subsequent to the application of the light having the predetermined energy level.

Abstract: A magnetic field generator includes a base, a plurality of magnetic field generating cores formed on the base, magnetic field generating coils respectively wound around the plurality of magnetic field generating cores, a magnetic material member being disposed between adjacent twos of the plurality of magnetic field generating cores, and a drive device for driving the magnetic field generating coils. Also, a magneto-optical recording apparatus includes an optical head for irradiating a light beam to a magneto-optical recording medium and the magnetic field generator. The magnetic field generator can set the maximum modulation frequency at a higher value while ensuring a scope of the effective vertical magnetic field sufficiently and efficiently, to thereby permit multi-recording.

Abstract: Disclosed is a magneto-optical recording apparatus for recording an information signal on or for erasing an information signal from magneto-optical recording media by irradiating the magneto-optical recording media with a beam of light while applying a magnetic field thereto. The magneto-optical recording apparatus includes, as a magnetic field application device, a composite magnetic head which includes a first magnetic head capable of modulating a generated magnetic field in accordance with an information signal, and a second magnetic head capable of generating a constant magnetic field which is not associated with the information signal and capable of switching the direction of the constant magnetic field. This provides a magneto-optical recording apparatus which can use magneto-optical recording media for both light modulation type recording and magnetic field modulation type recording, and which ensures overwriting without increasing the overall size of the apparatus.

Abstract: A magneto-optical recording method employs a magneto-optical recording medium having a first magnetic layer which exhibits a low coercive force at room temperature and a high Curie temperature and a second magnetic layer which is exchange-coupled to the first magnetic layer and which exhibits a higher coercive force and a lower Curie temperature as compared with those of the first magnetic layer. A magnetic field modulated in accordance with information to be recorded is applied to the magneto-optical recording medium while irradiating it with a light beam of a constant intensity so as to record the information. The recorded information is simultaneously confirmed by using a reflected light of this light beam.

Abstract: A magnetooptical recording/reproducing apparatus is provided with a device for determinating a power of a light beam which is emitted from a light source. In the apparatus, the light beam is irradiated on a magnetooptical recording medium while a magnetic field modulated according to a recording signal is applied to a portion on which the light beam is being irradiated. Light reflected from the medium upon the irradiation of the light beam thereto is detected by a detector, the output from which is used to reproduce the recording signal. The amplitude of the recording signal is detected from the reproduction signal. The power of the light beam to be emitted from the light source is determined on the basis of the detected amplitude of the recording signal.

Abstract: In a magneto-optic recording method and apparatus, an optical head irradiates a magneto-optic recording medium with a light beam, a magnetic head applies a modulated magnetic field to the recording medium to record a signal on the recording medium, a drive circuit supplies a drive signal to the magnetic head, a reference signal generating device causes the drive circuit to generate a reference signal having a predetermined duty, a reproducing device reproduces the signal recorded on the recording medium, a detection circuit detects a duty of a reproduced signal and a control circuit controls the drive signal such that the duty of the signal recorded on the basis of the reference signal and detected by the detection circuit becomes close to the predetermined duty.

Abstract: There is disclosed a magnetic field generating device for use in a magnetooptical recording apparatus of a magnetic field modulation method. The device includes a planar spiral coil, of which coil pitch is smaller in the peripheral area than that in the central area thereof, thus realizing a relatively wide area of magnetic field of uniform intensity, with a low inductance. Because of the planar structure, the device can be positioned very close to the recording medium, and can achieve the high speed switching required in the magnetic field modulation method, without a large power source.