Pioneer Electronic Corporation

Junichi Nishida

Toshiyuki Kimura

Hitoshi Sato

Fumio Endo

Akira Hayama

Kiyoshi Furukawa

Kenji Kaneko

Toshiharu Baba

Masahiko Sakaguchi

Morio Araki

Takeharu Arakawa

Kenichi Nobe

Jun Shinohara

Michihiro Kaneko

Yasushiro Ayukai

Tessho Ishida

Hitoshi Kaneko

Tatsuya Okamoto

Yoichi Yamazaki

Motoki Ishiguro

An audio disk/memory disk player. At the time of playing a disk, TOC information in a lead-in area will be read out first after loading of the disk is complete. The player determines whether the disk to be played is an audio disk (CD) or a memory disk (CD-ROM) based on identifying information in the TOC information. If the disk is the memory disk, the operation goes directly to a pause mode so that upon reception of a read command transition to the searching for a designated address is promptly executed to quickly read out the desired data. Only when the disk being played is the audio disk, the audio system is changed to the audio disk from another source, thus permitting a user to view a map while listening to the previous source. When playing for an area having a series of group information recorded is complete in special play mode, the mode is quickly changed to the pause mode in the case of the memory disk to wait for the read command, thus ensuring quick reading of designated map data. If the disk discrimination result indicates the memory disk, a muting process is performed to inhibit a sound generation from a loudspeaker. If in this case there are operation commands originating from erroneous confirmation by the user, at least one of the commands is ignored.

Disk player having automatic control based upon audio disk or memory disk determination

A method and system for deriving a travel distance of an object which travels. As one aspect, a travel velocity of the object producing a pulse signal in response to travel of the object on the basis of a number of pulses of the pulse signal per unit time is calculated, and a plurality of unit travel distances corresponding to a plurality of travel states of the object every travel state are calculated. The plurality of travel states are different from each other and the unit travel distance is a travel distance per pulse calculated by dividing the calculated travel velocity by the number of the pulses of the pulse signal per unit time. And the plurality of calculated unit travel distances are memorized individually, from the plurality of memorized unit travel distances, the unit travel distance corresponding to the travel state of the object which is under travel is selected, and the travel distance of the object on the basis of the selected unit travel distance and the pulse signal is derived.

Method and system for deriving travel distance of vehicle

A disk selection control device for a multidisk player, in which disk content identifying information and TOC information of the disks are preliminarily stored correspondingly with each other, and the disk content identifying information and disk holding position information of the disks are stored correspondingly with each other according to the TOC information when it is read-out. By inputting the disk content identifying information, the disk holding position information corresponding to the input disk content identifying information can be obtained from the above correspondency therebetween to thereby select a desired disk.

Disk selection control device for multidisk player

A method of processing information of a recording disc among a plurality of recording discs having different standards or recording formats, includes the steps of: selecting and exchanging an objective recording disc to be reproduced among the plurality of recording discs; executing a recording information reproducing operation on the basis of an application program of the selected objective recording disc; and selecting and exchanging the objective recording disc only with respect to the recording discs, having the standard or recording format reproducible by the application program, among the plurality of recording discs after executing the recording information reproducing operation.

Method of processing information of recording disc and apparatus for

A navigation device includes measurement unit for measuring a current position of a vehicle and generating a current position data, route collection unit for generating route data on the basis of the current position data, place name extraction unit for extracting place name information with a predetermined interval from a map information in accordance with the current position data, storage unit for storing the route data and the place name information, the stored route data comprising a plurality of block route data each sectioned by the place name information, edit unit for editing the block route data stored in the storage unit, and display unit for extracting the route data from the storage unit and displaying the extracted route data together with the map information.

Navigation device

A map display apparatus for displaying a wide area map and an enlarged map is disclosed. When a display mode is shifted from the mode of displaying the enlarged map to the mode of displaying the wide area map, a cursor frame is displayed on a position on a parent screen corresponding to the divided area which has been displayed in an enlarged manner just before the shift of the display mode, so that the position on the parent screen of the area which has been displayed in the enlarged manner so far can be easily discriminated.

Map display apparatus

A display apparatus for a multidisk player including a memory for storing data of titles and disk kinds for a plurality of disks, and a controller for reading all the stored data and displaying the title and the disk kind of each disk on a display in accordance with the read data. Accordingly, a user can acknowledge the content of each disk at a glance without actually playing the disks. Furthermore, the user can conveniently distinguish an audio disk from a ROM disk and select a desired one of these disks.

Multidisk player including a display that indicates titles and kinds of

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Kawagoe, Japan

Junichi Nishida