Abstract: Method for assigning a spare area in a rewritable optical recording medium is disclosed, in which a supplementary spare area is assigned as necessary if an enlargement of the spare area is required. The present method includes (1) determining an allowable size of the supplementary spare area, and (2) assigning the supplementary spare area in variable increments within the allowable size determined in (1).

Abstract: A defect area management method of an optical recording medium is disclosed. The present method is capable of managing a defective areas by storing information of defective blocks in the user block upon formatting as well as information of defective replacement blocks by extension of the user area by slipping.

Abstract: A method and device for searching a first available good spare block from an optical recording medium is disclosed. In the present invention, a first good block in a spare area is determined to be the first available spare block when there is at least one entry to a SDL without an entry of a replacement block assignment. Therefore, the present invention prevents searching a wrong replacement block when SDL entries without replacement block assignment are present.

Abstract: A rewritable optical medium and a method of managing its defect area is disclosed. The DMA condition or initially assignable spare area size in the present invention is determined based upon the interrelation between the spare area size and the DMA condition. Namely, the PDL entry condition among the DMA condition is determined to allow a minimum spare area for linear replacement in the initially assignable spare area after slipping replacement during formatting to facilitate management of the defect area of a rewritable optical medium. The present invention also discloses a method of controlling the recording/playback of optical media with the same format and different sizes, thereby improving the system performance.

Abstract: A spare area management method of an optical recording medium is disclosed. The spare area management method utilizes an identification information to indicate whether a primary spare area is full or a supplementary spare area has been assigned or extended, as necessary. Also, the present spare area management method improves the performance of the driver by replacing a defect block with a spare block nearer to the defect block.

Abstract: A rewritable optical recording medium and a method of assigning a spare area in the rewritable optical recording medium is disclosed. In the present invention, a primary spare area of optical discs, which have the same disc size and track pitch but different initial user sizes, are assigned to have a same size, thereby improving the compatibility the discs.

Abstract: A method for formatting an optical recording medium facilitates realtime recording. A continuity of the user area data is secured regardless of the manner of initializing by conducting slipping such that the user area is continuous. The method maintains a continuous user area during slipping replacement on an optical disk having the spare area assigned to the inner circumference, an optical disk having the spare area assigned to the outer circumference, and an optical disk having the spare area assigned both to the inner and the outer circumferences.

Abstract: A spare area management method of an optical recording medium is disclosed. The spare area management method utilizes an identification information to indicate whether a primary spare area is full or a supplementary spare area has been assigned or extended, as necessary. Also, the present spare area management method improves the performance of the driver by replacing a defect block with a spare block nearer to the defect block.

Abstract: Method for formatting, and managing a defective area of, a rewritable optical recording medium when a secondary defect list (SDL) is converted into a primary defect list (PDL) without certification by converting only sector numbers of first sectors of the defective blocks listed on the SDL into the PDL. If the defective sector thus listed of the PDL is encountered during writing/reading thereafter, a block (=16 sectors) containing the defective sector is subjected to slipping replacement.

Abstract: Method for recording/reproducing a data to/from a rewritable optical recording medium, including the steps of (1) conducting data writing/reading to/from a defective block if the defective block is encountered during a realtime writing/reading, and (2) conducting data writing/reading to/from a replacement block of the defective block if the defective block is encountered during a non-realtime writing/reading, whereby simplifying interface between the host and the optical disk recording/reproducing device, particularly in realtime writing/reproducing, that permits to reduce a burden on the host.

Abstract: Disclosed is an apparatus for controlling eccentricity in a photo-record player and a control method thereof. A relative eccentric quantity is found from a TE signal (or, tracking driving voltage) induced per one revolution of disc ‘on track’and an eccentricity phase to be controlled is found from a periodicity of TE (or, tracking driving voltage) per one revolution of disc. A suitable compensating value for the relation between the found eccentricity quantity and phase is generated by taking FG representing a period of revolution as a reference. Then, the compensating value is used for an eccentricity control ‘on track’, or driving the tracking actuator on ‘seek’. Therefore, the present invention reduces a seek location error due to the eccentricity on ‘seek’, thereby enabling to increase a seek performance.

Abstract: A method of formatting a rewritable optical recording medium includes registering defective blocks in a primary defect lists (PDL) and performing a slipping replacement corresponding to the number of PDL registrations, determining whether an error has occurred in the slipping replacement, and if it is determined that the error has occurred in the slipping replacement, adjusting a recording capacity of the optical recording medium by checking the number of un-slipped PDLs and reducing the recording capacity by the number of un-slipped PDLs. As a result, even if the error has occurred in the slipping replacement due to insufficient spare area, the PDL registration is still maintained without formatting error, thereby causing the optical recording medium to be usable.

Abstract: A contour enhancement method and circuit for adaptively enhancing a contour component of a luminance signal. In the method, a coring operation is performed with respect to the contour component. For the coring operation, a coring value is used which is adjusted according to characteristics of the contour component detected from an input luminance signal. The cored contour component is amplified by a predetermined gain, and the level of the gain-controlled contour component is limited to a predetermined threshold value to output a level-limited contour component. The level-limited contour component is then added to the input luminance signal to become a contour-enhanced luminance signal.

Abstract: A device and method for detecting a motion vector of an image. The device comprises a horizontal edge extractor, a one-line accumulator, a delay register, a vertical line memory, a sign decision memory, a vertical correlation arithmetic unit, a horizontal edge extractor, a first horizontal line memory, a second horizontal line memory, a comparator, and a horizontal correlation arithmetic unit. Directional edges are used to enhance the accuracy of a motion vector. Since correlation values are calculated as soon as a scan is completed for a field image, it is possible to detect a motion vector at high speed. The device realizes a simple circuit by economizing memory.

Abstract: An apparatus for deciding DCT block classes in a DVCR includes a scanning section for scanning AC coefficients among coefficients of respective DCT blocks, an absolute-value getting section for taking absolute values of the AC coefficients, a maximum value detecting section for obtaining the maximum values of respective DCT blocks from outputs of the absolute-value getting section, a minimum value detecting section for obtaining the minimum values from the maximum values of the DCT blocks obtained by the maximum value detecting section, and a deciding section for comparing outputs of the minimum value detecting section as threshold values with outputs of maximum value detecting section to decide the classes with respect to the DCT blocks.

Abstract: An edge detection apparatus and method for an image processing system are disclosed. The apparatus comprises a conversion means for converting input pixel data into tri-state valves, a matching means for obtaining inner products of tri-state valves and prespecified edge patterns and a decision means for determining the pixel data to be an edge when the pixel data is equal to the tri-state values. The edge detection apparatus can remove noise without an additional low pass filters, simplify the hardware and do real time process.