ECC/EDC算法理论：4字节检错码EDC：CD-ROM扇区中，有一个4字节共32位的EDC字域，它就是用来存放CRC码。



CD-ROM的CRC校验码生成多项式是32阶的,P(x) = (x16+x15+x2+1)(x16+x2+x+1)。



计算CRC码时用的数据块是从扇区的开头到用户数据区结束为止的数据字节，以Mode1为例，



即字节0—2063共2064个字节。将数据加上4个字节0，然后除多项式，得到的余数为校验码。

-ECC/EDC algorithm theory: 4-byte error detection code EDC: CD-ROM sector, there is a 4-byte word of 32-bit EDC domain, it is used to store CRC code. CD-ROM of the CRC checksum generation is 32-order polynomial, P (x) = (x16+ x15+ x2+1) (x16+ x2+ x+1). CRC codes used in the calculation when the data block from the sector at the beginning of the end of the user data area of data bytes to Mode1, for example, that a total of 2064 bytes 0-2063 bytes. Data plus 4 bytes of 0, and then addition to polynomials, I get the number of checksum.