Abstract: Portable information recording/play-back arrangements, wherein a controller judges whether a mode, controlling a first recording/play-back module and second recording/play-back module, is an imaging mode or a dubbing mode, and wherein when the controller judges that the mode is the imaging mode, the controller controls so that the imaging module and the first or second recording/play-back module operate on battery or a power supply from an external power source; and when the controller judges that the mode is the dubbing mode and the first and second recording/play-back module operate on the power supply from the external power source, the controller controls so that the dubbing operation is permitted.

Abstract: Portable information recording/play-back arrangements, wherein a controller judges whether a mode, controlling a first recording/play-back module and second recording/play-back module, is an imaging mode or a dubbing mode, and wherein when the controller judges that the mode is the imaging mode, the controller controls so that the imaging module and the first or second recording/play-back module operate on battery or a power supply from an external power source; and when the controller judges that the mode is the dubbing mode and the first and second recording/play-back module operate on the power supply from the external power source, the controller controls so that the dubbing operation is permitted.

Abstract: Portable information recording/play-back arrangements, wherein a controller judges whether a mode, controlling a first recording/play-back module and second recording/play-back module, is an imaging mode or a dubbing mode, and wherein when the controller judges that the mode is the imaging mode, the controller controls so that the imaging module and the first or second recording/play-back module operate on battery or a power supply from an external power source; and when the controller judges that the mode is the dubbing mode and the first and second recording/play-back module operate on the power supply from the external power source, the controller controls so that the dubbing operation is permitted.

Abstract: Portable information recording/play-back arrangements, wherein a controller judges whether a mode, controlling a first recording/play-back module and second recording/play-back module, is an imaging mode or a dubbing mode, and wherein when the controller judges that the mode is the imaging mode, the controller controls so that the imaging module and the first or second recording/play-back module operate on battery or a power supply from an external power source; and when the controller judges that the mode is the dubbing mode and the first and second recording/play-back module operate on the power supply from the external power source, the controller controls so that the dubbing operation is permitted.

Abstract: Portable information recording/play-back arrangements, wherein a controller judges whether a mode, controlling a first recording/play-back module and second recording/play-back module, is an imaging mode or a dubbing mode, and wherein when the controller judges that the mode is the imaging mode, the controller controls so that the imaging module and the first or second recording/play-back module operate on battery or a power supply from an external power source; and when the controller judges that the mode is the dubbing mode and the first and second recording/play-back module operate on the power supply from the external power source, the controller controls so that the dubbing operation is permitted.

Abstract: A disk device is arranged to select an appropriate rotation control method according to a kind of an optical disk, a recording format or a recording method so that a recording operation for a certain amount of information may be completed as fast as possible, even if a waiting time takes place until the rotation is set. The disk device includes a unit for selecting the rotation control method for recording a certain amount of information more efficiently and rapidly in light of time according to a kind of an optical disk, a recording format or a recording method. The selected rotation control method is executed to control the rotation of the optical disk when recording information on the disk.

Abstract: It is possible to save power in an HDD/optical disc combination camera. During a normal recording operated by a battery, only the hard disk is operated and operation of the optical drive is stopped. Alternatively, only the optical drive is operated and the operation of the hard disk is stopped. During dubbing, both of the HDD and the optical drive are operated when performing play-back/display during the dubbing and a large current is consumed. Accordingly, the operation is permitted only by external power supply. In the case of dubbing not performing play-back/display, the battery remaining amount is checked and dubbing is permitted only if the amount is equal to or greater than a threshold value.

Abstract: A first video file managed by a first directory having a DVD standard and a second video file which has High-resolution are recorded on optical disc. Reference information in order to refer to said second video data is recorded in said first video file. This makes it possible to store video data by a different compression method on the standard DVD disc as well as standard DVD video data.

Abstract: There is provided an information recording apparatus that can record information, such as video or the like, without interruption even while replacing an exchangeable power supply. A power supply in addition to the exchangeable power supply is provided in this information recording apparatus, and thereby the information recording apparatus provided with a unit that records information, such as video or the like, even while replacing the exchangeable power supply, can be provided, thus allowing information recording to be continued without interrupting to record information, and allowing for information recording that is convenient to users.

Abstract: It is possible to save power in an HDD/optical disc combination camera. During a normal recording operated by a battery, only the hard disk is operated and operation of the optical drive is stopped. Alternatively, only the optical drive is operated and the operation of the hard disk is stopped. During dubbing, both of the HDD and the optical drive are operated when performing play-back/display during the dubbing and a large current is consumed. Accordingly, the operation is permitted only by external power supply. In the case of dubbing not performing play-back/display, the battery remaining amount is checked and dubbing is permitted only if the amount is equal to or greater than a threshold value.

Abstract: In a disk apparatus capable of quickly recording a certain amount of information without waiting until a rotation is stabilized, a rotation control method is selected based upon the sort of optical disk, the recording format, the recording method, and the like for quickly recording a certain amount of information in a higher efficiency in view of a temporal aspect. Then, the disk apparatus records information on the optical disk, while the disk apparatus controls a rotation of the optical disk in accordance with the selected rotation control method.

Abstract: A disk device is arranged to select an appropriate rotation control method according to a kind of an optical disk, a recording format or a recording method so that a recording operation for a certain amount of information may be completed as fast as possible, even if a waiting time takes place until the rotation is set. The disk device includes a unit for selecting the rotation control method for recording a certain amount of information more efficiently and rapidly in light of time according to a kind of an optical disk, a recording format or a recording method. The selected rotation control method is executed to control the rotation of the optical disk when recording information on the disk.

Abstract: A first video file managed by a first directory having a DVD standard and a second video file which has High-resolution are recorded on optical disc. Reference information in order to refer to said second video data is recorded in said first video file. This makes it possible to store video data by a different compression method on the standard DVD disc as well as standard DVD video data.

Abstract: A first video file managed by a first directory having a DVD standard and a second video file which has High-resolution are recorded on optical disc. Reference information in order to refer to said second video data is recorded in said first video file. This makes it possible to store video data by a different compression method on the standard DVD disc as well as standard DVD video data.

Abstract: A recording medium having a data management structure capable of efficiently determining whether or not an outline image representing the outline of an original image and character information representing additional contents are added, and an motion-picture voice recording/reproducing apparatus for improving a retrieving operation factor of the recorded original image by generating and outputting the outline image from the original image even when the outline image is not added. Recording position information of images representing an outline of motion-picture and a voice signal, recording position information of character information representing additional contents relating to the motion-picture and voice signals, and/or information representing that the images representing the outline or the character information is not set by a user or by a system, are recorded to, and reproduced from, the recording medium.

Abstract: An optical recording/reproducing method employs a recording laser beam having a first output and a first wavelength, and a reproducing laser beam having a second output lower than the first output and a second wavelength shorter than the first wavelength. A disk-like recording medium is irradiated with the recording and reproducing laser beams by use of an objective lens having an NA of about 0.55 so that a small mark equal to or smaller than about one fourth of a spot size optically defined from the wavelength of the recording laser beam and the NA of the objective lens is formed on the recording medium by a recording characteristic of the recording medium and a shielding plate provided in an optical system for irradiation with the laser beam. Two-dimensional recording is performed as a recording system to arrange marks at lattice points of a two-dimensional lattice which extend in a track direction and a track radius direction.

Abstract: There is disclosed a harmonic modulation device of waveguide type including a semiconductor laser, a waveguide for generating a nonlinear optical harmonic of the semiconductor laser by keeping phase matching, means for leading an optical beam of the semiconductor laser to the waveguide, electrodes disposed on the waveguide, and means for modulating a refractive index of the waveguide electro-optically to modulate a phase matching condition and thereby modulate an intensity of the harmonic.

Abstract: An optical recording/reproducing method employs a recording laser beam having a first output and a first wavelength, and a reproducing laser beam having a second output lower than the first output and a second wavelength shorter than the first wavelength. A disk-like recording medium is irradiated with the recording and reproducing laser beams by use of an objective lens having an NA of about 0.55 so that a small mark equal to or smaller than about one fourth of a spot size optically defined from the wavelength of the recording laser beam and the NA of the objective lens is formed on the recording medium by a recording characteristic of the recording medium and a shielding plate provided in an optical system for irradiation with the laser beam. Two-dimensional recording is performed as a recording system to arrange marks at lattice points of a two-dimensional lattice which extend in a track direction and a track radius direction.

Abstract: An optical head apparatus for recording and reproducing data to and from optical disks, the apparatus boosting recording density by use of an objective lens with a higher numerical aperture (NA) than ever. A phase plate is added to the pupil position of the objective lens or to a position close thereto. The phase plate arrangement provides a deeper focal length, reduces the adverse effects of aberration and eliminates the need for a tilt servo mechanism despite the use of the objective lens having a greater numerical aperture than before.