Patent ID: 9177596
Filing Date: 2015-11-03
Classification: G11B,H03M,H04L

Abstract:
1. A decoding device which decodes digital information based on a detected signal obtained from a medium having predetermined frequency characteristics, the decoding device comprising: a first decoding unit which calculates a difference between a detected signal that is obtained when the digital information subjected to error correction coding in accordance with a predetermined error correction encoding system and also subjected to modulation encoding in accordance with a predetermined modulation system is passed through the medium and expectation signals that are obtained when arbitrary pattern signals are passed through the medium, and which outputs a pattern signal for which the calculated difference is smallest as a first decoded signal; a first demodulating unit which demodulates the first decoded signal in accordance with the modulation system to generate a first demodulated signal; a first error correcting unit which performs error correction on the first demodulated signal in accordance with the error correction encoding system to generate a first digital signal; and a re-modulating unit which re-modulates the first digital signal in accordance with the modulation system to generate a re-modulated signal; an interference canceling unit which extracts, using the re-modulated signal, from states of 2 a second decoding unit which generates a second decoded signal by calculating a difference integrated value in the K bit width range between the 2 a second demodulating unit which demodulates the second decoded signal in accordance with the modulation system to generate a second demodulated signal; and a second error correcting unit which performs error correction on the second demodulated signal in accordance with the error correction encoding system to generate a second digital signal.