| 摘要 |
AN OPTICAL RECORDING MEDIUM HAVING A READ-ONLY STORAGE AREA AND A WRITABLE STORAGE AREA AND A RECORDING/ REPRODUCING APPARATUS AND METHOD THEREOF. THE OPTICAL RECORDING MEDIUM IS A HYBRID DISC HAVING BOTH THE READ-ONLY STORAGE AREA(44), WHICH IS SUITABLE FOR MASS PRODUCTION OF INFORMATION HAVING THE SAME CONTENTS, AND THE WRITABLE STORAGE AREA (50) ON WHICH DATA CAN BE RECORDED , UPDATED OR ADDED AT A USER'S OPTION. THE READ-ONLY STORAGE AREA HAS A STRUCTURE THAT IS COMPLETELY COMPATIBLE WITH A DIGITAL VERSATILE DISC READ ONLY MEMORY (DVD-ROM) SPECIFICATION, AND THE WRITABLE STORAGE AREA IS COMPATIBLE WITH THE RECORDING/REPRODUCING CHARACTERISTICS OF WRITABLE DVD SPECIFICATION SO THAT AN EXHISTING REPRODUCING-ONLY APPARATUS CAN READ INFORMATION FROM THE READ-ONLY STORAGE AREA, AND DATA CAN BE RECORDED IN THE WRITABLE STORAGE AREA USING AN APPARATUS OBTAINED BY MINIMALLY CHANGING AN EXISTING RECORDING/REPRODUCING APPARATUS WHILE MAINTAINING THE PHYSICAL RECORDING CHARACTERISTICS OF THE EXISTING RECORDING/REPRODUCING APPARATUS.FIGURE 4
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