Patent ID: 7876243

Claim:
A transmission device configured to transmit a transmission bit string which is an arrangement of a unit bit string of N bits which is a plurality of bits, said transmission device comprising: conversion means configured to convert the unit bit string into a converted bit string in accordance with a conversion table obtained by obtaining an error rate wherein a k′th bit out of said N bits is in error for a test pattern which is a bit pattern of N bits that can assume said unit bit string; obtaining an error expectancy which is an expectancy that a significant bit of the N bits in said unit bit string will err, for each of a plurality of bit patterns that an insignificant bit, which is a bit that is not significant, can assume of the N bits of said unit bit string, using said error rate of said test pattern wherein said significant bit of the N bits in said unit bit string is the k′th bit; and creating a conversion table that correlates said unit bit string and a converted bit string obtained by converting said insignificant bit of the unit bit string to a smallest error expectancy bit pattern which is a bit pattern that minimizes said error expectancy of said plurality of bit patterns; and transmission means configured to transmit said converted bit string.