Reduction of Complexity for Estimating the Open Loop Pitch of the CS-ACELP Codec
Abhijit Maidamwar1, D.Marotakar2, Manisha Khorgade3, Swati Sorte4

1Abhijit Maidamwar, ETC Department, RTMNU University/ RGCER, Nagpur, India.
2Swati Sorte, ETC Department , RTMNU University/RGCER, Nagpur , India.
3D.Marotkar, ETC Department, RTMNU University/RGCER, Nagpur, India.
4Manisha Khorgade, ETC Department, RTMNU University/ RGCER, Nagpur, India.
Manuscript received on April 05, 2013. | Revised Manuscript received on April 28, 2013. | Manuscript published on May 05, 2013. | PP: 96-98 | Volume-3, Issue-2, May 2013. | Retrieval Number: B1445053213/2013©BEIESP
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Abstract: G.729 or Conjugate structure algebraic CELP is a audio voice codec that compresses speech signal based on model characteristics of human voice. This paper deals with the reduction of the computational complexity for estimating the open loop pitch of the CS-ACELP codec, described in ITU recommendation G.729. For reduction in computation of open loop pitch analysis using Matlab 7.4, the weighted delta-LSP function is used. This depth first tree search is also used in G.729 for reducing the search complexity with minimum effort. In experimental study of our paper we are showing the comparing graphical result of Open Loop Pitch in Matlab 7.4, we are trying to prove that our proposed method save the computational time for calculation of open loop pitch.
Keywords: Open loop pitch analysis of G.729, Graphical result of open loop pitch, A-CELP, bit allocation of 8 kbps in G.729.