Title :
An improvement of LPC based on noise reduction using pitch synchronous addition
Author :
Kuroiwa, Yoshinobu ; Shimamura, Tetsuya
Author_Institution :
Dept. of Inf. & Comput. Sci., Saitama Univ., Urawa, Japan
Abstract :
In this paper, we propose a pitch synchronous addition method for LPC analysis by making use of the periodicity of speech. It is shown that the solution overcomes the difficulty involved with the technique of noise reduction compatible with the stability of the LPC filter obtained by subtracting the noise part from the autocorrelation function of speech. The relation between the pitch period of speech and the improvement in signal-to-noise ratio accomplished by the method is investigated. The simulation results show the effectiveness of the proposed method especially for high-pitched speech
Keywords :
interference suppression; linear predictive coding; noise; speech coding; stability; LPC analysis; LPC filter; SNR improvement; autocorrelation function; high-pitched speech; noise reduction; pitch period; pitch synchronous addition; signal-to-noise ratio; speech periodicity; Additive noise; Autocorrelation; Filters; Linear predictive coding; Noise reduction; Signal to noise ratio; Speech analysis; Speech enhancement; Stability; Working environment noise;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.778800
