泛欧GSM 13kb／s RPE—LTP编译码算法探讨

作者在文章中探讨了数字移动通信标准中的一种优选编码方案－ＧＳＭ １３ｋｂ／ｓ ＲＰＥ－ＬＴＰ编译码方案，又着重研究其算法，计算反射系数的协方差斜格算法和自相关法窗函数的选取。该方案用Ｃ程序实现且采用实际录制的语言与正弦信号进行测试，性能与原方案基本相同。最后用ＴＭＳ３２０Ｃ２５高性能硬件仿真实现。

On the Encoding and Decoding Algorithm of the Pan Eurogean GSM 13kb/s RPE LTP

While discussing why the code rate of 13kb/s is employed in the encoding and decoding of RPE LTP and is an optimum encoding scheme in the stardards of the digital mobile communication, the author also studies the encoding and decoding of the GSM 13kb/s RPE LTP algorithm and has worked out relevant algorithms and coefficients. This scheme is realized by Program C and tested by speech recorded in actral life and by sine signals. The performance of this scheme is largely identically to that of the original scheme. At last the paper realizes the RPE LTP fixed point algorithm with C25 assembler langnage on TMS320 C25 development board.