A Robust Adaptive Quantizer with Extended Dynamic Range

A modified algorithm for an adaptive quantizer is proposed. The algorithm is of the backward estimating type and no additional information needs to be transmitted to the receiver. An analysis in terms of central step size behavior and mistracking caused by transmission errors is presented. In addition, the signal-to-distortion ratio is estimated by computer simulations. It is shown by an example that the new algorithm can result in a system with an extended dynamic range and the same approximate transmission error performance as a conventional robust algorithm.