Abstract: This paper presents a high quality variable-rate speech coding at 2.4kbps,1.2kbps and 800bps based on the algorithm of Multi-Band Excitation (MBE).

• 本文以多带激励声码器为模型，采用了多种技术去降低编码速率和改善音质.；我们利用动态规划算法对基音周期进行平滑，去除了声码器中常有的音调噪声