Decoding system and method for electronic non-volatile computer storage apparatus

A method, comprising:

• waiting for at least one decoding iteration;
• after said at least one decoding iteration, calculating a bit-based input log-likelihood ratio for each bit based on a confidence value for a cell containing said each bit;
• and
• providing the calculated bit-based input log-likelihood ratio for each bit to a decoder of an electronic non-volatile computer storage apparatus for a subsequent decoding iteration.

An electronic non-volatile computer storage apparatus, comprising:

• an encoder configured to encode data written to the electronic non-volatile computer storage apparatus;
• a storage module configured to store encoded data from the encoder;
• a log-likelihood ratio handler configured to provide an input log-likelihood ratio to a decoder, wherein the input log-likelihood ratio is at least one of:
• a uniform input log-likelihood ratio for all bits calculated based on a ratio of an estimated raw bit error rate (BER) to (1−BER) for a particular data unit, and
• a bit-based input log-likelihood ratio for each bit calculated based on a confidence value for a cell containing said each bit;
• and
• the decoder configured to decode the encoded data at least partially based on the input log-likelihood ratio from the log-likelihood ratio handler.