Abstract: A method and arrangement remembers a last-played position of a recorded medium by associating an identification number with the medium and storing therewith in memory a last-play position of the medium. The identification number of the recorded medium is analyzed after re-insertion of the medium into the player and play is resumed at the last-play position when the identification number corresponds with the identification number previously stored in memory.

Abstract: An optical disc includes a plurality of recording layers, each layer having a lead-in area, a data area, and a lead-out area. A dedicated-reproducing area having a disc-related information zone, and a rewritable area are provided in at least one of the lead-in and lead-out areas of the optical disc. Accordingly, a reliability of a data recording/reproducing with respect to the optical disc is improved.

Abstract: An electronic device incorporates a linear voltage regulator circuit which includes an external pass transistor that does not rely on internal compensation, provides high gain, and exhibits reduce silicon area and power requirements. Circuits according to the present invention provide sufficient bandwidth with an error amplifier and drive capability to keep any secondary poles sufficiently far from the unity gain bandwidth (UGB) while maintaining good power supply rejection.

Abstract: Disclosed is a music jukebox which is configured for storing a music library therein. The music jukebox includes a housing, audio input structure on the housing for receiving audio signals, audio output structure on the housing for outputting audio signals, and a data storage structure in the housing for storing audio signals. The music jukebox is configured such that a music library of sound tracks is storable in the data storage structure. The music jukebox includes means for selecting a sound track from the music library stored in the data storage structure to play through the audio output structure, and the housing includes a display thereon which identifies sound tracks in the music library. Preferably, the music jukebox is configured such that the sound tracks stored in the data storage structure are editable before being played through the audio output structure.

Abstract: An adaptive recording control method and apparatus independently controlling the power levels of a first pulse, a multi-pulse, and a last pulse. The adaptive recording control method of an optical recording medium, according to which a mark is formed using a multiple pulse train comprising a first pulse, a multi-pulse having a reference power level, and a last pulse, and the power levels of the first and last pulses are controlled in comparison with a reference power level of the multi-pulse depending on a correlation between a mark and a space between successive marks, setting the power level of the first pulse depending on the correlation between the mark and the space; setting the power level of the last pulse depending on the correlation between the mark and the space; and driving a recording unit by the multiple pulse train having the set power levels of the first and last pulses.

Abstract: An apparatus for receiving digital information including a receiver which receives the digital information that has digital video information bit-compressed by a first compression system, digital audio information bit-compressed by a second compression system, and error-detection information added to both the digital video information and the digital audio information. There is also provided a demodulator which demodulates the digital information received by the receiver, an error detector which detects an error of digital information demodulated by the demodulator by use of the error-detection information, a first expander which bit-expands video information among the digital information error detected by the error detector corresponding system, and a second expander which bit-expands audio information among the digital information error detected by the error detector corresponding to the second compression system.

Abstract: A data storage device has multiple storage media surfaces and corresponding heads, each storage media surface includes multiple regions, and each head is for recording on and playback of information from a corresponding storage media surface. A method of defining a storage format for the storage media surfaces includes reading data from each region on each storage media surface with the corresponding head, measuring a record/playback performance of each head for each region on each corresponding storage media surface based on the data read from the regions, and selecting a track density for each region on each storage media surface based on the measured record/playback performance of the corresponding head for the region.

Abstract: An assembly and method for recording and/or reading high-density data includes a phase change media, an antenna placed adjacent the phase change media, and a source of electromagnetic radiation.

Abstract: A perpendicular magnetic recording medium for thermo-magnetic printing has an ultra-high recording density and is resistant to thermal decay of magnetization. An intermediate layer of the medium is provided between a first recording layer using a low-noise Co alloy ferromagnetic substance and a second recording layer using a ferrimagnetic substance (e.g., a rare-earth element-transition metal compound) having a compensation temperature below an operation ambient temperature. A magnetic field is applied thereto to form a magnetization pattern on the first recording layer. It is then heated-up to be printed onto the second recording layer, which has a higher coercivity at the ambient temperature, and a recording field is suitably set to form a magnetization pattern only on the first recording layer. The magnetization pattern is printed from the first recording layer to the second recording layer.

Abstract: Prior to a main record, a trial write of data in an optical disc is performed in accordance with the characteristics between a record velocity and an optimum record power (Steps S2 to S4). The quality of a signal reproduced from the trial-written data is measured (Step S5). It is judged from the measured quality of the reproduced signal whether the predetermined velocity is a recordable velocity satisfying the characteristics between the record velocity and the optimum record power (Step 5). The main record is executed in accordance with the judgment result.

Abstract: A tool attachable to a spindle of a machine tool in the same way as an ordinary tool, capable of being driven without connecting with an external power supply etc., giving a higher rotational speed than that of the spindle of the machine tool without supplying electric power from the outside, and able to be changed automatically, provided with a machining tool for machining a workpiece, a motor for driving the machining tool, a generator for generating electric power to drive the motor by the rotation of the spindle, and a breaker for breaking a supply line of electric current from the generator to the motor when electric current over a predetermined value flows in the supply line.

Abstract: A ridge waveguide having a recessed ridge forming an isolated tip at a terminal end of the waveguide's aperture efficiently couples light into a spot adjacent to the tip in a medium below the terminal end of the waveguide which is significantly smaller than the light's wavelength. The waveguide is used to heat a recording medium via the small spot for heat assisted recording or to pattern substrates by photolithography with line width exposures that are significantly smaller than the wavelength of light. The body of the waveguide may also be recessed away from the medium in an area surrounding the waveguide's aperture to further confine the energy emerging from the waveguide to the small spot adjacent the tip in the medium.

Abstract: A method of recording data optically to an optical disk having a plurality of sectors, in which each sector has a region to be recorded with data, the data is recorded in units of blocks, and the block includes a predetermined number of sectors and is a data unit including error correction codes. In recording data related to a content by dividing and recording the data in a plurality of sectors continuously, dummy data to be used for extracting a clock in PLL for data reproduction is recorded on a region adjacent before a sector from which data recording is started. The data related to the contents is recorded on sectors following the region recorded with the dummy data.

Abstract: A data processing method of a virtual optical disk applied in an optical disk system is provided. The method includes steps as follows: Firstly a sound source determining procedure is executed. If the sound source is not from a virtual optical disk, a pre-processing and a buffer playing process are executed, and also a state changing process is executed while the buffer playing process is executed. According to a result of the state changing process, one of the following three steps is executed: the sound source determining procedure, the pre-processing procedure, and an idle determining procedure. If the system is not idling when executing the idle determining procedure, the buffer playing process is thus executed. Otherwise, a state assessment process is then executed. In accordance with the state assessment process, a storage capacity planning procedure, a write process or the state changing process is then executed.

Abstract: A method for determining a maximum number of attempted retry operations when a read error occurs in an optical disk device. The method includes the steps of receiving an RF signal from a pickup of the optical disk device, detecting an envelope of the RF signal, asserting a defect signal when a level of the envelope is lower than a predetermined threshold, generating interrupt pulses during the assertion of the defect signal, and determining the maximum number of attempted retry operations using the interrupt pulses.

Abstract: A transmitting apparatus and method for transmitting a digital signal in which a time-base compressor compresses the digital signal, a bit compressor compresses the time-base compressed signal from the time-base so that a transmission rate of the time-base compressed signal from the time-base compressor is higher than a transmission rate of the bit-compressed signal from the bit-compressor, and a transmitter transmits the bit compressed signal.

Abstract: A storage medium stores information on a plurality of tracks formed thereon, each of the tracks being divided into a plurality of sectors. The storage medium includes a physically formed sector beginning identifier provided at a leading portion of each sector, and an information storing portion. The information storing portion, another sector address portion at the trailing end of the information storing portion, includes at least one sector address portion at a leading end of the information storing portion, another sector address portion at the trailing end of the information storing portion, and a data portion provided between the two sector address portions.

Abstract: A pattern dependent write equalization method is disclosed. The method includes identifying a trait of a data pattern in a stream of write data. A characteristic of a write equalization signal is then defined according to the identified trait for the data pattern.

Abstract: An apparatus is provided for reproducing optical disks. An optical head irradiates linearly polarized light onto an optical disk. A change of a polarization orientation of light that is transmitted or reflected from the optical disk is detected in accordance with a recording signal on the optical disk. The apparatus moves the optical head into a pre-determined portion of the optical disk where write-once information is stored, and reproduces the write-once information after detecting a change of a polarization orientation of light that is transmitted or reflected from the pre-determined portion.

Abstract: In carrying out PWM-recording on optical disks, RESYNC BYTES including a bit compensation part, RESYNC detection part, and bit synchronization part are periodically inserted in the recorded data code stream. After encoding and at the time of decoding, RESYNC BYTES are detected by detection of the RESYNC detection part. The decoder is initialized by detecting the position of the bit synchronization part, and decoding is performed satisfactorily free from error. With this configuration, even for synchronization bytes having a comparatively long portion of consecutive code values, bit resynchronization is enabled free from mis-detection caused by peak shift. Even with the recording and reproducing characteristics with an un-symmetrical unerased area of the mark and space parts, the RESYNC detection part is fixed to either mark or space and RESYNC BYTES with little influence on an unerased area can be realized.