ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, ENCODING PROGRAM, DECODING METHOD, AND DECODING PROGRAM

摘要

A data predicted value generating unit (210) generates a predicted value (data predicted value) for source data (101) to be encoded on the basis of a history of the source data (101), which is floating point data. A data predicted value smoothing unit (221) aligns the exponent of the data predicted value with the exponent of the source data (101) and adjusts the significand of the data predicted value. A first residual generating unit (222) generates a new residual (a first residual) between the source data and the smoothed data predicted value. A first residual predicted value generating unit (223) generates a predicted value for the first residual (first residual predicted value) on the basis of a history of the first residual. A second residual generating unit (224) generates a residual (a second residual) between the first residual and the first residual predicted value. A residual encoding unit (230) encodes the second residual to generate the encoded data (102).