| 摘要 |
PROBLEM TO BE SOLVED: To define a frame of certain length, where a minimum number of frequency extraction components are obtained are obtained as an optimal frame, when a signal frequency component is extracted through a general harmonic analysis, and to decode a bit stream containing a frequency extraction component in an optimal frame. SOLUTION: A frame-setting circuit 1 sets the frame length of a waveform sample, which is generated by a waveform sample generating circuit 2 at the waveform sample generating circuit 2, on the basis header information. The waveform sample generating circuit 2 reads in the header information of the inputted bit stream and decodes signal frequency component in the frame of the inputted bit stream, through general harmonic analysis on the basis of header information. Successively, it is determined us to whether the decoded frequency component is the last frequency component, a decoding operation is continued until the decoding is the last frequency component, and a waveform sample which is the decoded result is outputted.
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