Implementation of GSM System Speech Coding Technology Using RPE-LTP Method

This document presents the implementation of GSM system speech coding technology using the RPE-LTP method. The approach includes comprehensive program code to complete this technical task. First, we introduce the fundamental principles and background knowledge of the RPE-LTP algorithm, detailing its operation through regular pulse excitation and long-term prediction components. Then, we provide a step-by-step implementation guide demonstrating how to apply this method for speech coding, including sample code segments showing frame segmentation, LPC analysis, and excitation vector quantization. The implementation covers key functions such as pre-emphasis filtering, autocorrelation calculation, and pitch period detection algorithms. Additionally, we include practical coding examples illustrating buffer management and parameter encoding procedures. Finally, we summarize the advantages and limitations of this method, along with suggestions for potential improvements and optimization directions. Through this documentation, readers will gain comprehensive understanding of the entire process and implementation steps for applying RPE-LTP methodology to GSM speech coding technology.