Patent ID: 8576910

Claim:
A parameter selection method of selecting parameters for variable length coding of prediction residuals of time-series signals in a certain discrete time segment, comprising: (A) a step of designating a positive second-segment parameter that corresponds to a monotonically non-decreasing function value of an average amplitude of prediction residuals in a time segment including a second segment as a parameter for variable length coding of prediction residuals in the second segment, a first segment being an earliest time segment included in the discrete time segment, and the second segment being a time segment subsequent to the first segment; and (B) a step of designating a value that corresponds to a monotonically non-decreasing function value of a sum of the second-segment parameter and a positive additional value that corresponds to an index representing prediction effectiveness of time-series signals in the time segment including the second segment as a parameter for variable length coding of a prediction residual at a certain discrete time in the first segment.