A rate-determination algorithm for variable-rate speech coder

In this paper, an efficient ratedetermination algorithm (RDA) is presented. This proposed RDA algorithm has been developed in order to reduce the bit rate needed to quantize the spectral parameters of the existing coders. This technique uses a combination between voice activity detection based on voice-unvoice classification of speech frames and rate-determination mechanism. The proposed algorithm has been simulated and tested. The results show that the proposed RDA offers a moderate quality speech with a high improvement in the average data rate.