| 摘要 |
A method and apparatus for automatically identifying the format of a sector in an optical storage device. Information on an optical disc is separated into data and subcode streams. The type of optical data is identified, and a first signal is generated to represent the type. Next, if the type is CD-ROM, the mode is identified, and a second signal is generated to represent the mode. Thirdly, if the mode is Mode-2 CD-ROM, the form is identified, and a third signal is generated to represent the form. A single signal may also be used to represent the type, mode, and form. In a CD embodiment, the type is identified by polling a type indicator bit, the mode is identified by polling the mode indicator bits, and the form is identified by comparing a first set of subheader bytes to a second set of subheader bytes, and polling a form indicator bit.
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