WRITABLE RECORDING MEDIUM, IDENTIFICATION INFORMATION RECORDING METHOD, INFORMATION RECORDING DEVICE, IDENTIFICATION INFORMATION REPRODUCTION METHOD, AND INFORMATION REPRODUCTION DEVICE

摘要

An information playback method and apparatus that includes reading first identification information from an auxiliary recording region of a recording medium, including the auxiliary recording region in which writing of content data is prohibited and a main storing region in which the content data can be written and reading second identification information from the main recording region. When first identification information is read from the auxiliary recording region and second identification information is read from the main recording region, comparing the first identification information with the second identification information, and outputting the content data read from the main recording region when the first identification information corresponds to the second identification information. When first identification information is not read from the auxiliary recording region or second identification information is not read from the main recording region, outputting the content data read from the main recording region.