由于在VOD系统中存放的数据都是一些视频流，我们分析了一种改进的RAID5技术——基于奇偶校验数据重构恢复的数据节点阵列RAID5。
Since the data stored in VOD system is a kind of video stream, we can use an improved RAID5 technology to improve the efficiency of data reconstructing operation in disk failure.
如果解码和编码是系统性的，那么所选子集就是奇偶校验位。
If the encoding and decoding are systematic then the selected subsets are of parity bits.
奇偶校验：加于一组二进制数字内的一个校验数元。它跟据系统逻辑，使总数为奇数或偶数。
Parity bit: a check bit added to a series of binary digits to make the total odd or even according to the logic of the system.
通过硬件上奇偶校验与软件上循环冗余校验（CRC）的实现，完成了系统的智能纠错功能；
The realization of intelligent correction is based on odd or even in hardware and CRC in software.
通过硬件上奇偶校验与软件上循环冗余校验（CRC）的实现，完成了系统的智能纠错功能；
The realization of intelligent correction is based on odd or even in hardware and CRC in software.
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