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54.Redundancy冗余比特是以一定规则产生的一些多余度码元,使原来不相关的信号序列中的码元,通过这些多余度码元变为相关(编码)。冗余度即为这些多余度码元占信息码元中的比例。CD唱片中的冗余度(含同步比特)为30.6%。
54. Redundancy Redundancy bits are extra redundancy symbols that are generated by a certain rule, so that the symbols in the original unrelated signal sequence become related (coded) through these redundancy symbols. Redundancy is the proportion of these extra-degree symbols in the information symbols. The redundancy in the CD record (with sync bits) is 30.6%.