On an information record medium (1), information is optically recorded and reproduced while a servo control is performed with respect to the information record medium by a push-pull method. The information record medium is provided with a record I reproduction area (DA) having a groove track (2), which is wobbled an...

A recording medium which exhibits good recording/reproducinq characteristic"s that make the recording medium usabJe in an optical recording/reproducing apparatus using a short-wavelength laser, while including a reflective film containing an aluminum al1oy which excels in view of the cost and handling, and a method of...

An information providing system that can provide information in a shorter downloading period. The information providing system includes a terminal device capable of reading information data recorded in a storage medium that has recorded incomplete information data. The incomplete information data from prepared...

A speaker device that even when being relatively thin and compact, realizes reduction of generation of abnormal noise by contact between a lead wire and another member, reduction of breakage of lead wire and reduction of deterioration of sound quality. The speaker device is one comprising magnetic circuit (2) provided...

The present invention is to provide a speaker magnetic circuit which, even if small in its thickness, can reduce an occurrence of magnetic flux leakage so as to obtain a sufficient magnetic flux density in a magnetic gap, particularly in a position where a voice coil is supported. The speaker magnetic circuit (11) com...

A speaker device is configured to be flat but capable of producing a large sound. The speaker device includes a magnetic circuit (40) having a magnetic gap (40G) which is disposed in a direction different from a vibration direction of a diaphragm (2), a voice coil supporting part (6) having a voice coil vibrating al...

To provide a thin speaker device a voice coil itself is made thin and vibration of the voice coil is efficiently transmitted to a diaphragm. The voice coil is used for a speaker device in which the vibration in one axial direction of the voice coil is transmitted to the diaphragm via a rigid vibration direction conver...

A thin bidirectional speaker device, which includes a driving part free from an adverse effect due to heat, is provided. The speaker device includes; a pair of diaphragms 101 , 10 2 disposed opposite each other, a frame 12 configured to vibratably support an outer periphery of the diaphragm in the vibration d...

A flat speaker device capable of emitting loud reproduced sound with a relatively simple configuration is provided. The speaker device includes a diaphragm, a frame supporting the diaphragm vibratably in the vibration direction, a magnetic circuit disposed in the frame, and a driving member for driving the diaphragm. ...

A focus servo device is for focusing a light irradiated from a light source onto a recording medium surface via an objective lens. Assuming that a wavelength of the light is λ , a numerical aperature of the objective lens is NA, an average run length period of the recording medium normalized by λ / NA is RL, the track...

An optical disc (1) is provided with a disc substrate (110); an information track (102, G) formed on the disc substrate spirally or coaxially around a center of the disc substrate, on which an information signal including a physical sector number is to be recorded; and a guide track (102, L) adjacent to the informatio...

An information recording medium has recorded thereon a plurality of sets of still image information to be continuously played back in the form called a slide show audio information to be played back in synchronization with the still image information. Also recorded on the information recording medium is playback con...

An optical recording medium having a track on which data has been previously recorded, comprising on the track a plurality of.data block regions each of which includes main data of a block which is divided into a predetermined number of main data pieces, each of which has data for identifying the main data, and linkin...

An information recording medium (100) contains: a series of content information including an image portion which can be a background image; button information (301) for defining a button menu enabling operation associated with the content information to be displayed during reproduction of content information; and play...

Provided is an information recording apparatus which, in a state Where the content of moving picture image information, etc. can be prevented from being indvertently recognized by the user due to inadvertent presentation to the user of a relevant representative picture image, enables recording the respe...

An information recording medium (100) is provided with a user data area (108) for recording therein record data; a plurality of temporary defect management areas (104, 105) for temporarily recording therein defect management information (120) which is a basis of defect management for a defect in the data area; and a...

A system controller is provided so as to record the second disk type information having the same content as that of the first disk type information, which is recorded in a DVD-R in advance, in a DVD-R in which the first disk type information is recorded as well as to record the record information in the DVD-R and...

An information recording medium includes an object data file for storing object data as a series of content information such as video information and audio information and play list information file for storing play list information defining a reproduction sequence on play list basis. Furthermore, the medium include...

An information recording medium comprising: a first recording layer to record therein first information which is at least one portion of record information; and one or a plurality of second recording layers, which are disposed on said first recording layer, to record therein second information which is at least ano...

An information recording medium contains version information indicating to which version of the recording specification the information recording medium corresponds. Moreover, the medium contains standard recording condition information for recording information at standard speed and high-speed recording condition i...

An information reproduction device (200) comprises display means (353) for displaying a main image and a sub-image of a first type, the display of which can be started at a desired reproduction time, storage means (355, 360) for storing the identification number of the sub-image, first control means (354, 359) for d...

When direction-converting the vibration of a voice coil and efficiently transmit the vibration of the voice coil to a diaphragm, generation of abnormal noise or damage to the voice coil due to contact is restrained by properly restricting the vibration of the voice coil. A diaphragm 10, a static part 100 vibratably ...

A temporary defect management area (14) is arranged between a control information recording area (12) and a data area (11) of a write once recording medium (10). Before finalizing the recording medium (10), defect management information is temporarily recorded in the temporary defect management area (14). When perfo...

On a write-once-type recording medium 10, there are provided' a definite defect management area 13 to definitely record 5 therein defect management information; and a plurality of temporary defect management areas 14A, 14B, and 14C to temporarily record therein the defect management information. If the recording ...

A write once type recording medium (10) is provided with a data area (11) ro record threrin record data; and a plurality of management areas in which a plurality of types of management information for managing the record data and index information for indicating newest management information can be recorded a plural...

A series of content information, menu information to be displayed with the content information during reproduction, and play list information specifying the reproduction sequence of the content information in units of items that constitute the content information and that can be accessed during reproduction are reco...

An optical disc (1) is provided with a disc substrate (110), an information track (102, G) formed on the disc substrate spirally or coaxially around a center of the disc substrate, on which an information signal including a physical sector number is to be recorded; and a guide track (102,L) adjacent to the informa...

A disc has a physical factor changing a shape or a reflection coefficient in a tangential direction of a record track. A tracking control apparatus (l00) for the disc is provided with: a detecting device (5) Having a first detector (5a), a second detector (5b) disposed adjacent to the first detector in a rad...

A recordable optical disc (100) is provided with a disc substrate (110); a record track (.102) formed on the disc substrate spirally or coaxially around a center of the disc substrate; and an emboss pit formed in a predetermined zone on the disc substrate in correlation with predetermined data, which is reco...

The present invention provides an information recording methodand an information recording apparatus, which are capable of recordingreproduction controlling information in information recording mediumsuch as DVD. An operation portion designates a division timing in theaudio informatio...

[Problem to be solved] The object of the present invention to provide aninformation recording apparatus or the like capable of effectively securing thecopyright on the record information by making a sharp distinction between arecoding medium in which the private record information is record...

This invention comprises an optical disc (1) provided with a recordable area (R1A, 1A) having aninformation track (102, G) in which an information signal is to be recorded, a first emboss areain which first emboss pits array are formed and a second emboss area in which second embosspits arr...