Anthony P. van den Heuvel

Speech quality improvement for voice coders and synthesizers

A harmonic signal is created from a limited spectral representation of a voice signal. The harmonic signal is combined with the at least a portion of the limited delayed spectral signal to provide a reconstructed speech signal having perceptually improved audio quality.

A Basis for Setting Burn-in Yield Criteria

This simple, useful, and practical approach to assess the cost benefits from using burned-in plastic ICs assumes a simple approximation for early life failure during burn-in and predicts the failure rate of the residual parts on the basis of yield percentage. Because product applications, end-user environment, and device quality vary, the simplicity of this method is obtained at the cost of some rigor. Nonetheless, the results are useful and are consistent with measured data.