计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (33): 159-161.

• 数据库、信号与信息处理 • 上一篇    下一篇

LPC-10e到MELP语音编码转换

陈 峰,吴玉成   

  1. 重庆大学 通信工程学院,重庆 400044
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-11-21 发布日期:2011-11-21

LPC-10e to MELP speech transcoding

CHEN Feng,WU Yucheng   

  1. College of Communication Engineering,Chongqing University,Chongqing 400044,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-11-21 Published:2011-11-21

摘要: 针对在采用LPC-10e和MELP两种不同的语音编码算法标准的通信系统中实现相互通信,提出一种从LPC-10e语音编码到MELP语音编码的参数直接转换方案,实现LPC-10e语音编码的基音周期、清浊音判决参数等转换成MELP语音编码相应参数。仿真结果表明,参数直接转换方案不仅提高了合成语音质量,而且降低了15%左右的编码运算量。

关键词: 线性预测, 语音编码, 编码转换

Abstract: In order to realize the intercommunication between systems which are based on LPC-10e and MELP speech coding algorithm,the transformation of speech coding data stream based LPC-10e to MELP can be realized by using the direct parameter transcoding.Direct conversion of LPC-10e speech coding pitch,voicing parameter into MELP corresponding parameters is achieved.The results show that,the method proposed not only improves the synthetic speech quality,but also reduces about 15% computational cost.

Key words: Linear Predictive Coding(LPC), speech coding, transcoding