A 1.44Kbps Vocoder Based on LSP

摘要

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