Abstract: The present disclosure relates to a gas injection stabilization device and comprises: a fixed volume part having a first gas space with a fixed volume; at least one variable volume part which is in communication with the fixed volume part, and which has a volume that varies due to a gas introduced to and discharged from the fixed volume part, and which has a second gas space connected to the first gas space; a gas supply part which is connected to the fixed volume part and receives a supply of a gas from an external gas supply device; and a gas discharge part which is connected to the fixed volume part and discharges a gas to an external surgical space.

Abstract: An optical recording medium storing information for regarding data in the current sector as data in a linking loss area, and an apparatus and method providing linking data. The data link method includes dividing an error correction code block having a predetermined size into a plurality of sectors and checking data type identification information which indicates whether or not data in each sector is linking data; and replacing main data of a sector with predetermined data according to the result of checking the data type identification information. According to the above method, data type information is checked to determine whether or not to replace main data of the current sector with dummy data. By doing so, error occurrence of the prior art can be prevented and block error correction is carried out more effectively.

Abstract: An apparatus and method detecting synchronization of address in pre-groove (ADIP), allowing an optical storage device to write data to an accurate location of a disc includes a bit synchronization detecting unit and a word synchronization detecting unit. The bit synchronization detecting unit determines synchronization of bits of the ADIP to be in a bit synchronization locked state when synchronization of raw bits is detected within a bit synchronization window having a first predetermined period a first predetermined number of consecutive times. The word synchronization detecting unit determines synchronization of words of the ADIP to be in a word synchronization locked state when synchronization of raw words is detected within a word synchronization window having a second predetermined period the first predetermined number of consecutive times.

Abstract: An apparatus and method to detect an LPP sync signal on an optical storage medium include a frame sync bit detection unit detecting frame sync bits from the LPP sync signal on the optical storage medium and a sync detection unit determining whether continuity exists in the detection of the frame sync bits and detecting a 6-bit sector sync or a 3-bit sector sync using a 6-bit long window or a 3-bit long window, respectively, in response to a result of the determination. The apparatus further includes a sync detection result output unit outputting a sector sync detection period when continuity exists in the detection of frame sync bits and in the detection of the 3-bit sector sync or 6-bit sector sync and counting a sync detection signal and a new sync detection period when a sector sync signal is detected by the sync detection unit.

Abstract: A disk recording apparatus and method therefore including a boundary violation detector to determine whether a violation of a block boundary occurs on a disk by determining a phase difference between a block boundary signal and an encoding block synchronous signal.

Abstract: An optical recording medium storing information for regarding data in the current sector as data in a linking loss area, and an apparatus and method providing linking data. The data link method includes dividing an error correction code block having a predetermined size into a plurality of sectors and checking data type identification information which indicates whether or not data in each sector is linking data; and replacing main data of a sector with predetermined data according to the result of checking the data type identification information. According to the above method, data type information is checked to determine whether or not to replace main data of the current sector with dummy data. By doing so, error occurrence of the prior art can be prevented and block error correction is carried out more effectively.

Abstract: An apparatus for detecting and correcting a relative address on an optical storage medium, includes a relative address detector which reads relative addresses recorded on the optical storage medium, a relative address continuity detector which checks whether the number of continuances between the relative addresses output from the relative address detector is at least a predetermined number N, and a relative address corrector which forcibly corrects a current relative address that is not consecutive to a previous relative address and outputs the corrected relative address, after the relative address continuity detector determines that the number of continuances between the relative addresses is at least the predetermined number N.

Abstract: A block synchronization detection apparatus and method. Block synchronization for discriminating one error correction code (ECC) block from another is detected, even when a first sector of the ECC block is not detected in a system having a decoder that decodes an ECC in units of ECC blocks. The block synchronization detection apparatus includes an operator performing an operation on a predetermined last sector number, an n-th sector number, and an (n?1)-th sector number contained in a block, based on a predetermined operation relation; and a comparator comparing a result of the operation output from the operator with a predetermined threshold value and outputting the result of the comparison as a block synchronization signal.

Abstract: An optical recording medium storing information for regarding data in the current sector as data in a linking loss area, and an apparatus and method providing linking data. The data link method includes dividing an error correction code block having a predetermined size into a plurality of sectors and checking data type identification information which indicates whether or not data in each sector is linking data; and replacing main data of a sector with predetermined data according to the result of checking the data type identification information. According to the above method, data type information is checked to determine whether or not to replace main data of the current sector with dummy data. By doing so, error occurrence of the prior art can be prevented and block error correction is carried out more effectively.

Abstract: An apparatus which records/reproduces data with respect to an optical recording medium, includes a data processing unit which detects a phase difference between a phase reference signal and a groove wobble signal detected from the optical recording medium, and compensates for the phase difference and performs a signal processing to record data on or reproduce data from the optical recording medium in response to the phase difference being equal to or greater than a predetermined reference value. By detecting a phase difference between a phase reference signal and a wobble signal and compensating for the phase difference, a recording of data on and a reproducing of data from the optical recording medium can be more accurately performed.

Abstract: An apparatus for detecting and correcting a relative address on an optical storage medium, includes a relative address detector which reads relative addresses recorded on the optical storage medium, a relative address continuity detector which checks whether the number of continuances between the relative addresses output from the relative address detector is at least a predetermined number N, and a relative address corrector which forcibly corrects a current relative address that is not consecutive to a previous relative address and outputs the corrected relative address, after the relative address continuity detector determines that the number of continuances between the relative addresses is at least the predetermined number N.

Abstract: A method of overwriting data in a linking loss area. The method includes the operations of (a) determining whether or not the first sector of a block in which it is desired for data to be recorded is a linking loss area, and if it is determined that the first sector is a linking loss area, reading the previous block; (b) modifying data type identification information of the last sector of the previous block after completing reading the previous block; and (c) recording data in blocks starting from the previous block. According to this method, based on determination of whether or not the first sector of the block in which it is desirable to record data is a linking loss area, data is recorded in the blocks starting from the current block or from the previous block so as to prevent errors in reproducing. By doing so, the method improves error correction effects.

Abstract: An apparatus and method detecting synchronization of address in pre-groove (ADIP), allowing an optical storage device to write data to an accurate location of a disc includes a bit synchronization detecting unit and a word synchronization detecting unit. The bit synchronization detecting unit determines synchronization of bits of the ADIP to be in a bit synchronization locked state when synchronization of raw bits is detected within a bit synchronization window having a first predetermined period a first predetermined number of consecutive times. The word synchronization detecting unit determines synchronization of words of the ADIP to be in a word synchronization locked state when synchronization of raw words is detected within a word synchronization window having a second predetermined period the first predetermined number of consecutive times.

Abstract: A block synchronization detection apparatus and method. Block synchronization for discriminating one error correction code (ECC) block from another is detected, even when a first sector of the ECC block is not detected in a system having a decoder that decodes an ECC in units of ECC blocks. The block synchronization detection apparatus includes an operator performing an operation on a predetermined last sector number, an n-th sector number, and an (n−1)-th sector number contained in a block, based on a predetermined operation relation; and a comparator comparing a result of the operation output from the operator with a predetermined threshold value and outputting the result of the comparison as a block synchronization signal.

Abstract: A circuit and a method of preventing errors in recording. The circuit includes a first detector to generate a detection pulse by determining whether or not a counted value, which is obtained by counting a cycle of an input wobble signal based on a system clock signal, is in the permissible range of a constant write rate. The circuit further includes a second detector to generate a recording control signal to allow or prohibit a record operation after determining whether the detection pulse meets a predetermined lock condition or a predetermined unlock condition. The circuit prevents errors in recording prevents errors in reproduction data caused by errors in recording, by prohibiting recording if the rotation speed of a disc is not at a desired constant rate in an optical recording and/or reproducing apparatus in which data can be reproduced at a constant or a variable rate and must be recorded at a constant rate. Thus, data can be stably recorded, thereby enhancing recording quality.

Abstract: An apparatus and method are provided receiving wobble signals indicative of a wobble pattern formed on an optical medium. A wobble lock/unlock detector detects whether the wobble signals exist during a wobble window period and generates wobble lock/unlock signals indicative thereof. A wobble defect detector counts the wobble window signals in response to the wobble lock/unlock signals indicating that the wobble signals do not exist during the wobble window period, detects a wobble defect in response to the counted wobble window signals satisfying a defect decision condition, and outputs a defect detection signal indicative thereof.

Abstract: A method protecting a header region formed in an optical disc when a signal is written on the optical disc and an apparatus therefor. The method protecting a header region of an optical disc write apparatus comprises detecting the header region from an RF signal detected from the optical disc through a pick up, generating a write clock, generating a write control signal whose state is inverted after the lapse of a predetermined clock by counting the write clock, generating a write stop signal when the write control signal is generated in the header region detected in the detecting of the header region, and controlling the intensity of the write laser beam corresponding to the write control signal. The generating of the write stop signal comprises feeding the write control signal back to the generating of the write control signal to control the write control signal.

Abstract: An apparatus and method to detect an LPP sync signal on an optical storage medium include a frame sync bit detection unit detecting frame sync bits from the LPP sync signal on the optical storage medium and a sync detection unit determining whether continuity exists in the detection of the frame sync bits and detecting a 6-bit sector sync or a 3-bit sector sync using a 6-bit long window or a 3-bit long window, respectively, in response to a result of the determination. The apparatus further includes a sync detection result output unit outputting a sector sync detection period when continuity exists in the detection of frame sync bits and in the detection of the 3-bit sector sync or 6-bit sector sync and counting a sync detection signal and a new sync detection period when a sector sync signal is detected by the sync detection unit.

Abstract: An apparatus which records/reproduces data with respect to an optical recording medium, includes a data processing unit which detects a phase difference between a phase reference signal and a groove wobble signal detected from the optical recording medium, and compensates for the phase difference and performs a signal processing to record data on or reproduce data from the optical recording medium in response to the phase difference being equal to or greater than a predetermined reference value. By detecting a phase difference between a phase reference signal and a wobble signal and compensating for the phase difference, a recording of data on and a reproducing of data from the optical recording medium can be more accurately performed.

Abstract: A disk recording apparatus and method therefore including a boundary violation detector to determine whether a violation of a block boundary occurs on a disk by determining a phase difference between a block boundary signal and an encoding block synchronous signal.