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 LDPC = 1.429 BEC
1 BEC = 0.7 LDPC
例子:
将15 LDPC代码冗余转换为向后误差校正：
15 LDPC = 21.429 BEC
| LDPC代码冗余 | 向后误差校正 |
|---|---|
| 0.01 LDPC | 0.014 BEC |
| 0.1 LDPC | 0.143 BEC |
| 1 LDPC | 1.429 BEC |
| 2 LDPC | 2.857 BEC |
| 3 LDPC | 4.286 BEC |
| 5 LDPC | 7.143 BEC |
| 10 LDPC | 14.286 BEC |
| 20 LDPC | 28.571 BEC |
| 30 LDPC | 42.857 BEC |
| 40 LDPC | 57.143 BEC |
| 50 LDPC | 71.429 BEC |
| 60 LDPC | 85.714 BEC |
| 70 LDPC | 100 BEC |
| 80 LDPC | 114.286 BEC |
| 90 LDPC | 128.571 BEC |
| 100 LDPC | 142.857 BEC |
| 250 LDPC | 357.143 BEC |
| 500 LDPC | 714.286 BEC |
| 750 LDPC | 1,071.429 BEC |
| 1000 LDPC | 1,428.571 BEC |
| 10000 LDPC | 14,285.714 BEC |
| 100000 LDPC | 142,857.143 BEC |
规则