Extensions
CD-ROM XA is an extension of the Yellow Book standard for CD-ROMs that combines compressed audio, video and computer data, allowing all to be accessed simultaneously. It was intended as a bridge between CD-ROM and CD-i (Green Book) and was developed by Sony and Philips. "XA" stands for eXtended Architecture.
CD-DA sector types:
- Audio (2352): Data (2352). Raw data, no ECC; used for audio.
CD-ROM sector types:
- Mode 1 (2048): Sync (12), Address (3), Mode (1), Data (2048), EDC (4), reserved (8), ECC (276). 2048 bytes of user data with error correction; usually used for computer data.
- Mode 2 (2336): Sync (12), Address (3), Mode (1), Data (2336). 2336 bytes of user data, no ECC; usually used for compressed audio, video or picture.
CD-ROM XA defines two forms of Mode 2 sectors:
- Mode 2 Form 1 (2048): Sync (12), Address (3), Mode (1), Subheader (8), Data (2048), EDC (4), ECC (276). 2048 bytes of user data, ECC, can interleave with Mode 2 Form 2 sectors; used for data.
- Mode 2 Form 2 (2324): Sync (12), Address (3), Mode (1), Subheader (8), Data (2324), EDC (4). 2324 bytes of user data, error detection, can interleave with Mode 2 Form 1 sectors; used for audio/video data.
Read more about this topic: CD-ROM XA
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