MDS Codes
Block codes that achieve equality in Singleton bound are called MDS (maximum distance separable) codes. Examples of such codes include codes that have only one codeword (minimum distance n), codes that use the whole of (minimum distance 1), codes with a single parity symbol (minimum distance 2) and their dual codes. These are often called trivial MDS codes.
In the case of binary alphabets, only trivial MDS codes exist.
Examples of non-trivial MDS codes include Reed-Solomon codes and their extended versions.
Read more about this topic: Singleton Bound
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