Method, Apparatus, Program and Recording Medium for Long-Term Prediction Coding and Long-Term Prediction Decoding

摘要

A method and apparatus multiplies a past sample a time lag tau older than a current sample by a quantized multiplier rho' 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 if the multiplier rho' is smaller than 0.2 or if information about the previous frame is unavailable, or codes the time lag using a variable-length coder if rho' is not smaller than 0.2. A multiplier rho is coded by a multiplier coder and the multiplier rho' obtained by decoding the multiplier rho is outputted. The process is performed for each frame.