Patent ID: 7082258

Claim:
An interleaving method for correcting short burst errors in a digital versatile disk (DVD), the method comprising the steps of: merging a plurality of error correction code (ECC) blocks, each having a predetermined size, in a horizontal direction, to form a merged ECC block; and storing the merged ECC block in a buffer in units of a predetermined number of rows and interleaving the ECC block in units of a predetermined number of bytes in accordance with a predetermined interleaving rule, wherein when interleaving is performed such that every two ECC blocks are merged in a horizontal direction to form a new ECC block and the merged ECC blocks are grouped in units of two lines for interleaving, the predetermined interleaving rule satisfies the following formulae: 1) when t=0, k=2m, where m=2t 2) when t=1, 2, . . . , 22, k=2m, where m=2t k=2(m−1)+94, where m=2t−1 3) when t=23, 24, . . . , 45, k=2(m−45)+1, where m=2t−1 k=2(m−46)+93, where m=2t 4) when t=46, 47, . . . , 68, k=2(m−92)+2, where m=2t k=2(m-91)+92, where m= 2 t- 1 5) when t=69, 70, . . . , 90, k=2(m−137)+3, where m=2t−1 k=2(m−138)+95, where m=2t 6) when t=91, k=2(m−137)+3, where m=2t−1. wherein reference symbol ‘t’ used in six equations of the above formulae, denotes a positive integer of greater than or equal to 91 inclusive of 0 , m is let to be the index assigned before interleaving and k is let to be the index assigned after interleaving.