| 摘要 |
The invention concerns a method which consists, for the analysis of an audio signal (x), in weighting samples of each frame of N samples through an analysis window of the Hamming, Hanning, Kaiser type or the like; calculating the audio signal spectrum by transforming each frame of weighted samples in the frequency domain; and in processing the spectrum of the audio signal to deliver synthesis parameters for a signal derived from an analysed audio signal. The successive frames for which complete sets of synthesis parameters are supplied advantageously have mutual overlaps of less than N/2 samples. During synthesis, the method consists in recovering the frames with an optional interpolation, and in reforming the signal by a frame overlapping sum, after having carried out an appropriate weighting of the samples. |
