An improved method for-AMR-WB speech codec

摘要：

　　an improved method is proposed to skip the look-ahead period in this paper.The improved method uses the autocorrelation algorithm to calculate the Linear Prediction (LP) coefficients and then the LP coefficients are employed to extrapolate new samples for replacing the look-ahcad samples.To evaluate the quality of this method,perceptual evaluation of speech quality (PESQ) and the A/B listening test method are designed for the objective evaluation and subjective evaluation.The reconstructed quality of the modified method is near to the original AMR codec,at the same time,the delay of the improved method is lower 5ms than the original method.

关键词： AMR speech codec autocorrelation look-ahead Linear Prediction

作者: Chunling Zhang Shenghui Zhao Hongyuan Xiao Jing Wang Jingming Kuang

作者单位: School of Information and Electronics, Beijing Institute of Technology, Beijing, 100081, China

会议类型: 国际会议

会议名称: 2012 2nd International Conference on Computer and Information Applications(ICCIA2012)(2012第二届计算机和信息应用国际会议)

会议地点: 太原

会议语种:英文

页码: 490-493

在线出版日期: 2012-12-08（万方平台首次上网日期，不代表论文的发表时间）