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讨论了一种VOD业务的实现方案，提出了用指纹识别和加解扰相结合的方法来提高VOD系统的安全性，并给出了指纹识别算法和算法基于数字信号处理器和可编程逻辑器件的硬件实现。
A scheme of VOD service is discussed. The method of combining fingerprinting and descrambling is proposed to improve the security of VOD system. The algorithm and algorithm of fingerprinting are given. Based on digital signal processor and programmable logic device Hardware implementation.