用LBG算法产生的码书，码书中的码向量在码书中的排列是无序的。

LBG vector quantization algorithm is used to create codebook traditionally, but the sequence is not in order.

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当发生盗版时，数据发行商不但可以追踪到叛逆者，而且可以通过更新用户的码向量来废除叛逆者的秘密钥的解密能力。

When the piracy occurring, the data supplier not only can trace the traitor but also can revoke the decryption ability of the traitor's private key by updating the code vectors of the users.

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针对LBG算法中初始码书生成存在盲目性的问题，提出了一种基于训练向量集合分量之间的相关性进行码向量分割的方法。

To alleviate the blindness of Linde-Buzo-Gray algorithm(LBG algorithm) while generating initial codebook, a new code word splitting method based on covariance of training vector is proposed.

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