系统内冗余或重复数据的度量，表明存储和潜在性能问题效率低下。
1 FDR = 2.222 SC
1 SC = 0.45 FDR
例子:
将15 频级冗余转换为源编码冗余：
15 FDR = 33.333 SC
| 频级冗余 | 源编码冗余 |
|---|---|
| 0.01 FDR | 0.022 SC |
| 0.1 FDR | 0.222 SC |
| 1 FDR | 2.222 SC |
| 2 FDR | 4.444 SC |
| 3 FDR | 6.667 SC |
| 5 FDR | 11.111 SC |
| 10 FDR | 22.222 SC |
| 20 FDR | 44.444 SC |
| 30 FDR | 66.667 SC |
| 40 FDR | 88.889 SC |
| 50 FDR | 111.111 SC |
| 60 FDR | 133.333 SC |
| 70 FDR | 155.556 SC |
| 80 FDR | 177.778 SC |
| 90 FDR | 200 SC |
| 100 FDR | 222.222 SC |
| 250 FDR | 555.556 SC |
| 500 FDR | 1,111.111 SC |
| 750 FDR | 1,666.667 SC |
| 1000 FDR | 2,222.222 SC |
| 10000 FDR | 22,222.222 SC |
| 100000 FDR | 222,222.222 SC |
规则