Simulation of Conjugate Structure Algebraic Code Excited Linear Prediction Speech Coder
Keywords:
8 kbps algorithm, codebook search, CS-ACELPAbstract
The CS-ACELP is a speech coder that is based on the linear prediction coding technique. It gives us the bit rate reduced to up to 8kbps and at the same time reduces the computational complexity of speech search described in ITU recommendation G.729. This codec is used for compression of speech signal. The idea behind this algorithm is to predict the next coming signals by the means of linear prediction. For his it uses fixed codebook and adaptive codebook. The quality of speech delivered by this coder is equivalent to 32 kbps ADPCM. The processes responsible for achieving reduction in bit rate are: sending less number of bits for no voice detection and carrying out conditional search in fixed codebook.
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