FIG. 13 is an illustration of a reference audio signal edited to swap two adjacent segments, resulting in a target audio signal. As shown in FIG. 13, bar 1302 shows which portions of the reference signal match which portions of the target signal. Bar 1310 shows the interval within which the swap edit occurs. Bar 1320 shows where the systems described herein identify a swap edit.

FIG. 14 is an illustration of segments of a pair of audio signals that are part of a longest common subsequence and that are not part of a longest common subsequence. As shown in FIG. 14, the set of edits includes several substitutions that fall outside of the longest common subsequence (“Out of Subsequence”).

FIG. 15 is an illustration of identifying where credit sequences start and end in two respective episodes of a show series. As shown in FIG. 15, the credit sequences start at different times in the two respective episodes. However, because they are the only significant content overlap between the two episodes, they represent the longest contiguous common subsequence (appearing in FIG. 15 as a long diagonal line). Systems described herein may therefore use the techniques described herein to identify credit sequences in episodes and mark them accordingly (e.g., to assist post-production teams to focus resources and/or to perform automated tasks such as adding a “skip credits” functionality to apply to the correct time window. Systems described herein may apply the techniques described herein to video signals and/or to audio signals to identify credit sequences.