A 1.44 kbps vocoder based on LSP
Tianyi Jiang, Yongming Li, Hongyi Chen · 2002
This paper presents a simple and efficient speech coding algorithm based on traditional LPC vocoder. By employing a dynamic smoothing method to optimize the pitch detector and split vector quantization to quantize the LSP parameters, a high level of speech quality and intelligibility is achieved at 1.44 kbps. Because of the low computational complexity and high coding efficiency, it is one of the best algorithms suitable for ASIC design.