Patent ID: 6895173

Claim:
A combined DVD (Digital Video Disk)/CD (Compact Disk) data processor to process a pulse stream of data from a DVD or a CD, comprising: a demodulator to EFM+ demodulate the pulse stream in a DVD mode, and EFM demodulate the pulse stream in a CD mode, to generate demodulated data; a single ECC (error checking and correction) decoder to error-correct the demodulated data according to a predetermined code length and error correction range, the predetermined code length and error correction range having different values in the DVD and CD modes, to generate error corrected data; and a memory to store the error corrected data from said ECC decoder, wherein said memory comprises a first memory map including a plurality of blocks of the error corrected data each having a first fixed number of bytes in the DVD mode, and a second memory map including a plurality of frames of the error corrected data each having a second fixed number of bytes in the CD mode.