Reducing signature matching uncertainty in media monitoring systems

At least one non-transitory computer readable medium comprising computer readable instructions that, when executed, cause at least one processor to at least:

• compare first groups of monitored signatures from a sequence of monitored signatures representative of monitored media with second groups of reference signatures from respective sequences of reference signatures representative of corresponding different reference media to determine a first sequence of signature match results for an observation period, the first groups and the second groups to have a first size corresponding to a first number of signatures;
• detect a discontinuity in the first sequence of signature match results;
• and
• in response to the discontinuity, compare third groups of monitored signatures from the sequence of monitored signatures with fourth groups of reference signatures from the respective sequences of reference signatures to determine a second sequence of signature match results for the observation period, the third groups and the fourth groups to have a second size corresponding to a second number of signatures greater than the first number of signatures.

A method to perform signature comparison, the method comprising:

• comparing, by executing an instruction with at least one processor, first groups of monitored signatures from a sequence of monitored signatures representative of monitored media with second groups of reference signatures from respective sequences of reference signatures representative of corresponding different reference media to determine a first sequence of signature match results for an observation period, the first groups and the second groups to have a first size corresponding to a first number of signatures;
• detecting a discontinuity in the first sequence of signature match results;
• and
• comparing, by executing an instruction with at least one processor, and in response to the discontinuity, third groups of monitored signatures from the sequence of monitored signatures with fourth groups of reference signatures from the respective sequences of reference signatures to determine a second sequence of signature match results for the observation period, the third groups and the fourth groups to have a second size corresponding to a second number of signatures greater than the first number of signatures.