④ 矢量量化编码(Vector Quantization Coding)在量化时对数据分组，一组数据构成一个 矢量，然后以矢量为单位，逐个矢量进行量化，称矢量量化。
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At last, the adaptive vector quantization coding based on the DCT spectrum main orientation mentioned above is developed.
最后本文探讨了一种将基于结构特征的自适应分块与矢量量化相结合的编码方法。
This method connects fractal and vector quantization coding together, during the process of decoding, the only need to check the codebook and to transform the contrast.
由于该方法把分形和矢量量化编码结合起来，因此解码时只需查找码书，并仅进行对比度变换。
The work can be mainly divided into two aspects: lattice vector quantization in vector quantization coding for images and the lifting realization of the quincunx directional filter banks.
所做工作主要有两方面：一是矢量量化编码中的格型矢量量化，另一个是梅花型方向滤波器的提升实现。
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