改进的子帧矢量量化

Improved sub-frame vector quantization

提出了一种新的子帧划分方法 四叉树分裂法 .并对LBG算法中初始码书的分裂方法进行了修正 .模拟实验结果表明 ,在相同的压缩比的情况下 ,信噪比要优于传统的矢量量化 (VQ)和子帧矢量量化 (SVQ) 。

A new dividing method named four tree for Sub-frame is proposed, also a modification of the LBG algorithm is given. The result of simulation experiment shows that the reconstructed image is better than those traditional SVQ and VQ in PSNR and perception.