Abstract: With consideration of LI3G algorithm depending on initial codebook, a new LIBU initial codebook generation algorithm was dcvclopcd,on the basis of Greedy Tree Growing Algorithm (GTGA) and Most Dispcrscd Codewords in Initialization (MDCI) algorithm. A fundamental codebook was generated by GTGA first, and then an initial codebook was produced from the fundamental codebook by MDCI algorithm. The computation of this new algorithm is lower than usual Split algorithm, and the run time decreases too. Compared with these two basic algorithms, both the Distortion and Average Spectral Distortion are redueed.

Key words: Vector quantization, LBU algorithm, Greedy tree growing algorithm(UTUA)，Most dispersed codewords in initialization(MDCI) algorithm, Run time, Spectral distortion