TH30698A - Optical disc and drive device, optical disc - Google Patents

Abstract

The DC60 (28/05/46) optical disc uses land-based track format and a single-loop groove that allows precise adjustment of the track indentation. And reliable measurement of the point Change between land track and groove track. And the driving device for that purpose is revealed in this invention. The four physical address regions PID1, PID2, PID3, and PID4 are recorded with the title regions in such a way that PID1 and PID2 are 1/2 of the track distance towards the line. Around the outside of the disc From the center of the grooved track and PID3 and PID4 are 1/2 offset of the track distance towards the inner circumference of the disc. From the center of the grooved track and the physical address area, PID1-PID4 can be measured. By means of the signal Differs in radial directions The single-frequency VFO model area at the starting point of each PID is extended by PID1 and PID3, allowing tracking indentation to be corrected using aggregate signals and land-groove changeover measurements. By using the difference signal obtained from the indentation PID, optical disc using land track format and single loop groove. That makes it possible to correct the indentation of the track very accurately And reliable measurement of the transition point between land track and trench track. And driving equipment for that purpose It is revealed in this invention. Four physical address regions, PID1, PID2, PID3, and PID4 are recorded with the title region in such a way that PID1 and PID2 are 1/2 of the track distance to the outer circumference of the disc. From the center of the grooved track and PID3 and PID4 are 1/2 offset of the track distance towards the inner circumference of the disc. From the center of the grooved track And physical addressing area PID1-PID4 can be measured. By means of signaling, the difference in direction radius. The single-frequency VFO model area at the origin of each PID is extended by PID1 and PID3, allowing tracking indentation to be corrected using aggregate signals. And measurement of land-rut turning points Using the difference signal obtained from the indentation PID

Claims (5)

1.Optical disc with recording area Teeth consist of Substrate of a disc with a groove Surrounded and land between the furrows The film records the phase transition located in the data recording area to record information using the front and main edges of the recording mark produced by the restricted shift. In the reflections made on the film, the voiced phase transition records Laser beam of a specific wavelength (Formula) that is focused by The lens of the NA-specific opening and the single recording coil was formed by an alternating slit-log insertion connection equal to one disk circumference. And the land log track is equal to one disk circumference, with the p track distance p less than 2p ((formula) / NA) less than 2p. The log track contains an integer of the log sector at length. The log sector is sufficient to store the recorded data with the optical log sector. Disc is read-only and is an integer multiple of the length of the synchronized frame of the optical disc read-only, and each log sector contains Mirror area And the subject area that was pre-formatted with a doctor, the edge of which displays such information is address information. At the very least, the address information was recorded with the subject area modulated by modulation method at the length that was limited. Subject area contains Four times recorded PID physical address area containing VFO single frequency pattern region for the occurrence of syncing. Synchronize the clog signal And measure the time between AM address mark reconstruction for the night synchronization process during the repeating headline and initiating the Pid address area detection time to retain the address information of the discrepancy sensing area sector. IED address to store tolerance code, address and PA back for complete modulation. At the physical address area, the four PID regions are divided into PID1, PID2, PID3, and PID4, from PID here in the subject area where PID1 and PID2 are approximately p / 2 indent to the outer circumference or the outer circumference. In from the center of the track of the grooved log track and PID3 and PID4 are approximately p / 2 indent to the inner circumference or perimeter from the center of the grooved track track. The record mark in the VFO is longer than the shortest log mark of the modulation method, and the VFO length in PID1 and PID3 is long enough to enclose the edge of the recording mark sufficient to lock the synchronization. The VFO length in PID2 and PID4 will be long enough to enclose the margin of the log mark sufficient to reconfirm the recursive clock signal synchronization within the VFO and area. The VFO in PID1 and PID3 is sufficiently longer than the VFO region in PID2 and PID4. The AM address mark is longer than the longest log mark of the modulation method. The length of the log mark does not appear in the sequence of the Pid modulation bits, at least long enough to recognize the number of record sectors. That can store user data beyond the recording capability of optical media. The read-only disk above the IED is the length that allows for the reproducibility error in the address area.The PID can be measured with a tolerance measurement rate that is less than or equal to the specific rate behind the PA as the minimum required length. By modulation method And is the length that can make the log mark complete and the mirror area is longer than the longest log mark of modulation method 2. Optical disc As stated in claim 1, where the insertion distance p is 0.74 (formula) m, when the laser beam wavelength (formula) is 650 nm and the lens opening is 0.6, modulation method. It is a method to modulate at 8-bit data rate to 16-bit channels with the shortest recording mark to 3-bit, the longest recording channel to 11-bit, VFO channel to 36 bytes in PID1 and PID3 and 8. Byte in PID2 and PID4 mark, AM address is 3 byte, Pid is 4 byte, IED is 2 byte, back PA is 1 byte, and mirror area is 2 byte. 3. Optical drive device Disk for optical drive The disks specified in Clause 1, consist of Disc motor to rotate optical disc at a specific linear speed. Laser diode for laser beam formation of a specific wavelength (formula). A photodetector with a unique opening, NA, photodetector for measuring light reflected by an optical disk. A second iteration circuit to obtain a combined signal of all the light that strikes the photodetector and a second iteration circuit to obtain the direction difference signal radius from Light strikes on a photo detector where the speed of the disc motor is controlled to drive an optical disc at a specific linear speed. The laser beam of the wavelength (formula) is focused by the lens of the NA opening on the recording area through the disk substrate. The laser energy emitted is controlled at a specific rebuilding energy level during information reconstruction. The focused laser beam is focused at a specific position on the film, recording the phase shift by means of servo focus control perpendicular to the recording surface and track servo control by radius to The log track and the boundary between the groove log track and the land log track were measured on the basis of the difference signal obtained from a second iteration circuit. When the laser beam is scanning PID1, PID2, PID3 and PID4 4.Optical disk drive devices to drive the optical disc as described in Clause 1, which consists of Disc motor for rotating optical disc at specific linear speed. Laser diode for laser beam reproduction of a specific wavelength (formula). A photodetector with a unique aperture, NA, a photodetector to measure incident light from an optical disc. D to obtain the combined signal of all incident light on the photodetector and a second iteration circuit to obtain the direction difference signal radius from the incident light on the photodetector. The variable speed factor of the disk motor is controlled to drive optical disc at a specific linear speed. The laser beam of the wavelength (formula) is focused by the lens of the NA opening on the recording area through the disk substrate. The laser energy emitted is regulated at the energy level, reproduced only during information reconstruction. The focused laser beam is focused at a specific location on the film, recording a phase shift. By way of adjusting the focus servo control Perpendicular to the log surface and servo control of the radius track with the track record. And the tracking indentation is corrected to the basis of the combined signal obtained from the recursive cycle at one When the laser beam is scanning PID1, PID2, PID3 and PID4 5. Optical drive device Disk for optical drive Discs, as stated in claim 1, where the edge of the disc is measured by the radius of the difference signal.