LONG-TERM PREDICTION ENCODING METHOD, LONG-TERM PREDICTION DECODING METHOD, DEVICES THEREOF, PROGRAM THEREOF, AND RECORDING MEDIUM

摘要

The present invention multiplies a past sample a time lag τ older than a current sample by a quantized multiplier ρ' on a frame by frame basis, subtracts the multiplication result from the current sample, codes the subtraction result, and codes the time lag using a fixed-length coder 35 if the multiplier ρ' is smaller than 0.2 or if information about the previous frame is unavailable, or codes the time lag using a variable-length coder 34 if ρ' is not smaller than 0.2. A multiplier ρ is coded by a multiplier coder 22 and the quantized multiplier ρ' obtained by decoding the multiplier ρ is outputted. The process is performed for each frame.