| 摘要 |
The present invention relates to encoding and decoding of digital audio data enabling change of reproducing speed without degradation of articulation of audio while being compatible with various digital contents. In the encoding, a pair of a sine component and a cosine component digitized are generated at each of preset discrete frequencies and, by use of these sine component and cosine component, each of amplitude information items of the sine component and the cosine component is extracted from digital audio data sampled at a predetermined sampling period. Then frame data consisting of pairs of amplitude information items of sine and cosine components extracted corresponding to the respective discrete frequencies is successively generated as part of encoded audio data. |
