Title :
Fast pitch modelling for CS-ACELP coder using fermat number transforms
Author :
Madre, G. ; Baghious, E.H. ; Azou, Stephane ; Burel, G.
Author_Institution :
Laboratoire d´´Electronique et Syst. de Telecommun., CNRS, Brest, France
Abstract :
This paper presents a double improvements to reduce the speech coding complexity of the pitch prediction in a code-excited linear prediction (CELP) coder. First, the pitch analysis structure is modified. A new fast pitch modelling by linear-filtering (PMF) procedure will determine the adaptive and stochastic codebook contributions of the excitation signal. Afterwards, an efficient implementation of the PMF-CELP coding is proposed by using number theoretic transforms which can significantly reduce the algorithm computation complexity.
Keywords :
computational complexity; filtering theory; linear predictive coding; speech coding; transform coding; transforms; CS-ACELP coder; Fermat number transforms; algorithm computation complexity; code-excited linear prediction coder; codebook contributions; linear-filtering procedure; number theoretic transforms; pitch analysis structure; pitch modelling; Digital arithmetic; Discrete Fourier transforms; Fourier transforms; Predictive models; Signal analysis; Signal synthesis; Speech analysis; Speech coding; Speech synthesis; Stochastic processes;
Conference_Titel :
Signal Processing and Information Technology, 2003. ISSPIT 2003. Proceedings of the 3rd IEEE International Symposium on
Print_ISBN :
0-7803-8292-7
DOI :
10.1109/ISSPIT.2003.1341233
