Lloyd-Max's Algorithm Implementation in Speech Coding Algorithm Based on Forward Adaptive Technique

In this paper a detail analysis of speech coding algorithm based on forward adaptive technique is carried out. We consider an algorithm that works on frame-by-frame basis, where a frame consists of a certain number of speech samples. Buffering frame-by-frame an estimation of the gain defined as squared root of the frame variance is enabled. The information about the gain (side information) and the code book of a nonadaptive quantizer, which is designed for the unit variance case of the input signal, are further used when designing an adaptive quantizer. In such a way better quantizer adaptation to the varying input statistics is provided. Observe that the goal of this paper is to investigate the preference that for the wide range of variance change could be achieved when implementing in the forward adaptive speech coding algorithm, the recently developed effective method for the Lloyd

• Type: Journal
• Year: 2008
• Where: INFORMATICALT
• Authors: Jelena Nikolic, Zoran Peric
• Keywords: Algorithm, INFORMATICALT 2008, Quantizer, Unit Variance Case