| 摘要 |
A device for forming omitted samples by extrapolation in a transmitted signal having non-uniform, grouped samples representing a short-time stationary signal such as speech. The grouped samples are passed through a series of delay circuits. Fourier transformation of the samples is performed to form omitted samples which are inserted in the signal between the grouped samples. The Fourier transformation is used to select multiplication coefficients which are multiplied by the sample amplitudes, with the products of the multiplication being summed to form the omitted samples. In one embodiment the extrapolation is performed in both carry forward and carry back circuits.
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