Patent ID: 7949071
Filing Date: 2011-05-24
Classification: G11B

Abstract:
1. An information transmission system for generating a transmission signal by superposing sub-information on main information, the system comprising: a first encoder configured to encode main information; a second encoder configured to encode sub-information; a first modulator configured to modulate a carrier based on an output of the first encoder; a duplicating module configured to duplicate an output of the second encoder to generate encoded sub-information units, each of the units comprising data units; a shuffling module configured to shuffle an order of the data units, which form the encoded sub-information units generated by the duplicating module, based on a value unique to encoding units of the second encoder; and a second modulator configured to amplitude-modulate the output of the first encoder based on the encoded sub-information units in which the order of the data units is shuffled, wherein the second modulator is configured to amplitude-modulate with σ/(μ×(2