Patent ID: 7802165

Claim:
A decoder system that decodes a data signal formed by encoding a first data string by redundancy encoding, interleaving the encoded data string, performing a second level of encoding on the interleaved data string to form an encoded signal, modulating a wave using the encoded signal to form a modulated wave, and transmitting the modulated wave over a data communication path, the system including: a demodulation unit operative to receive the modulated wave transmitted over the data communication path and demodulate the modulated wave to form demodulated data; a first decoder unit operative to receive the demodulated data, decode the second level of encoding and output a decoded signal and a first error indication signal indicative of the presence of errors in the decoded signal; a de-interleaving unit operative to de-interleave the decoded signal to form a de-interleaved signal; an identifier unit operative to receive the first error indication signal, and, from the first error indication signal, produce a second error indication signal indicative of the presence of errors in the de-interleaved signal; and a redundancy decoder that employs the de-interleaved signal and the second error indication signal to perform redundancy decoding.