Method and device for correcting code and character error by using detected error position

Provide a method and system for using an error correction Cl / PI word by the EFM / EFM + decoder error location detected. The channel decoding and error correction method comprising: (a) the code set path; (b) demodulated channel data symbols by using the channel code is determined, generating demodulated data includes information data symbols and deletion flag; and ( c) using the error location indicated by the deletion flag, and performs error in the information data symbols demodulated data - erasure correction. The channel decoding and error correction system comprising: a channel decoder, a memory and a decoding unit.