Waveform reconstruction from non-uniform samples with application to speech coding

Summary form only given. For non-stationary signals, such as speech, we show that extrema are useful non-uniform samples for a compact reconstruction. We demonstrate the effectiveness of different interpolating functions for reconstructing the signal from the extrema. We also show that such a non-uniform sample based reconstruction scheme can be used for applications like speech coding. In this context, we explore the quantization properties of the extrema information and design a good quality speech coder at 12-13 kbps.