Patent ID: 7747431

Claim:
A code conversion method of receiving a first code string to convert the first code string into a second code string, and to output the same, the method comprising: generating a decoded signal from the first code string in accordance with a decoding method; and judging whether the decoded signal is an audio signal or a non-audio signal by using information contained in the undecoded first code string, and encoding the decoded signal in accordance with an encoding method on the basis of the judgment to generate a second code string, wherein the generating step includes an audio decoding step and a non-audio decoding step; the audio decoding step comprises receiving a first code corresponding to an audio parameter contained in the first code string when the information corresponds to an audio section, and decoding an audio signal from the first code by the decoding method, and outputting the decoded audio signal as the decoded signal; and the non-audio decoding step comprises receiving a second code corresponding to a non-audio parameter contained in the first code when the information corresponds to a non-audio section, decoding a non-audio signal from the first code by the decoding method, and outputting the decoded non-audio signal as the decoded signal.