In Digital video broadcasting for digital transmission for satellite applications, a powerful FEC (Forward Error Correction) sub-system is needed. FEC is based on LDPC (Low-Density Parity Check) codes concatenated with BCH (Bose Chaudhuri Hocquenghem) codes, allowing Quasi Error Free operation close to the Shannon limit.
Irregular parity check matrix
Minimum sum algorithm
Soft decision decoding
BCH decoder corrects up to t errors where t = 10 or 12