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 = 1.176 CC
1 CC = 0.85 FDR
例子:
将15 频级冗余转换为卷积代码冗余：
15 FDR = 17.647 CC
| 频级冗余 | 卷积代码冗余 |
|---|---|
| 0.01 FDR | 0.012 CC |
| 0.1 FDR | 0.118 CC |
| 1 FDR | 1.176 CC |
| 2 FDR | 2.353 CC |
| 3 FDR | 3.529 CC |
| 5 FDR | 5.882 CC |
| 10 FDR | 11.765 CC |
| 20 FDR | 23.529 CC |
| 30 FDR | 35.294 CC |
| 40 FDR | 47.059 CC |
| 50 FDR | 58.824 CC |
| 60 FDR | 70.588 CC |
| 70 FDR | 82.353 CC |
| 80 FDR | 94.118 CC |
| 90 FDR | 105.882 CC |
| 100 FDR | 117.647 CC |
| 250 FDR | 294.118 CC |
| 500 FDR | 588.235 CC |
| 750 FDR | 882.353 CC |
| 1000 FDR | 1,176.471 CC |
| 10000 FDR | 11,764.706 CC |
| 100000 FDR | 117,647.059 CC |
规则