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Graphics Interchange Format  |  1996-06-19  |  62KB  |  546x336  |  4-bit (16 colors)
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OCR: CD-ROM SECTOR FORMAT One CD Frame (588 bits) Sync Subcode | Packing 12 data 4 error byte bytes correction 12 data 4 error bytes bytes correction bytes 27 bits 14 bits) 13 bits] (204 bits) (68 bits) (204 bits] 168 bits) (Not to scale) 12 x 14-bit bytes + 12 x 3-bit packing 204 bits 1 Sector - 1 block = 98 frames of 588 bits per frame "Pecking" is 3 bits added between 1 4-bit words to remove residual D.C. FIGURE 2: A CD-ROM track is subdivided into a series of sectors, or blocks, that are read af o constant speed. Each block contains 98 frames in which 33 bytes (24 data bytes, eight error correction byles, and one subcode byte) are embedded. There are 2,353 dola bytes per block.