Encoding apparatus and method, recording medium, and decoding apparatus and method

摘要

A first codec-based warning message generator 151 generates a warning message by a first. A first codec-based silent fixed pattern generator 152 generates a first codec-based silent fixed pattern. A second codec encode block 154 encodes an input signal by a second codec. A code string generator 155 generates a synthetic code string by synthesizing outputs from the above components in an encoding frame having a predetermined length being a unit of encoding.