Patent ID: 7092335
Filing Date: 2006-08-15
Classification: G06F,G11B

Abstract:
1. A data recording method for use in a rewritable phase change type optical recording medium having a phase change type recording layer on its substrate and having a first read only area and a rewritable area of the same multilayer structure in its information recording area, wherein the optical recording medium includes data and address information in the first read only area and the rewritable area include basic data units having the same logical structure, auxiliary data capable of distinguishing between read only data and rewritable data is provided in a basic data or in a data unit formed by a plurality of basic data units, whereby a groove is formed in the rewritable area to have a wobble made so that a center line thereof shows a predetermined amplitude with respect to a recording/readout optical beam scanning direction, and the data in the first read only area is obtained by a plurality of pre-pits rows made on the substrate, while a center line of a pre-pits row in the first read only area has a wobble to show an amplitude substantially equal to the amplitude of the groove with respect to the optical beam scanning direction, and consecutive address information is given by the wobble of the groove and the wobble of the center line of the pre-pits row, and a carrier frequency due to the wobble of the groove and the wobble of the center line of the pre-pits row is frequency-modulated or phase-modulated with digital information to provide the auxiliary data, identification information representative of an optical recording medium having a first read only area, said identification information is written in a specified area of the optical recording medium in order to make the recording system recognize a rewritable type medium in which the phase change type recording medium partially has the first read only area, and the identification information is previously written on the substrate of the specified area of the optical recording medium as data such as pre-pits or wobbles, and at least a starting address of the first read only area is previously written on the substrate of the specified area of the optical recording medium as data such as pre-pits or wobbles, wherein the data recording method, comprising: first recognizing step for getting the identification information of the optical recording medium and recognizing that the medium is a rewritable phase change type optical disc having a first read only area; a program executing step for gaining access to the first read only area recognized by the first recognizing step to acquire data of an application program for executing the contents of the application program; an information inputting step for inputting required information in accordance with the application program executed by the program executing step; and a first recording step for recording the required information inputted through the information inputting step, wherein the first recording step comprising: a second recognizing step for recognizing the auxiliary data in an area to be recorded; and a second recording step for recording the required information of the first recording step, when the area is the rewritable area, while sending an error message to move to another area, when the area is the first read only area.