INFORMATION DECENTRALIZATION SYSTEM FOR ONE-BIT AUDIO, TRANSMISSION SIGNAL GENERATING DEVICE AND RECEPTION SIGNAL PROCESSOR USED FOR THE SYSTEM, AND ONE-BIT AUDIO SIGNAL TRANSMITTING METHOD

摘要

PROBLEM TO BE SOLVED: To realize network secret communication of one-bit audio data by ensuring high security.;SOLUTION: For one-bit audio, a music/speech signal is represented by a one-bit series and respective signals are decentralized to a plurality of signals (D₁ to D₄) in d(=3)-bit frame representation. Although respective series data obtained as the result of the decentralization become long in bit length and are music/speech signals since they are one-bit series, a sound which is completely different from the original music/speech signal is reproduced when the signal is reproduced. Respective bits of the decentralized signals (D₁ to D₄) are ORed and the OR signal is divided into (d)-bit frames, in which addition is carried out to generate a new one-bit series of 1 generated when the sum exceeds a certain value (1.5), and 0 when not. This series is the original one-bit audio data (D).;COPYRIGHT: (C)2005,JPO&NCIPI