Coding for tolerance and detection of skew in parallel asynchronous communications

We provide a new definition for the concept of skew in parallel asynchronou s communications introduced in [2]. The new definition extends and strength ens previously known results on skew. We give necessary and sufficient cond itions for codes that can tolerate a certain amount of skew under the new d efinition. We also extend the results to codes that can tolerate a certain amount of skew-and detect a larger amount of skew when the tolerating thres hold is exceeded.