Media monitoring using multiple types of signatures

An audience measurement meter associated with a media presentation device comprising:

• at least one processor;
• memory having stored thereon machine readable instructions that, when executed by the at least one processor, cause the audience measurement meter to perform a set of operations including:
• generating an initial sequence of monitored fingerprints at an initial sampling rate from initial sequentially sampled segments of a media signal corresponding to media presented by the media presentation device, wherein the initial sequentially sampled segments are separated in time by an initial sampling interval corresponding to the initial sampling rate;
• while generating the initial sequence of monitored fingerprints, measuring one or more characteristics of the media signal;
• determining, based on the measured one or more characteristics of the media signal, an adjusted sampling rate different from the initial sampling rate;
• generating a subsequent sequence of monitored fingerprints at the adjusted sampling rate from subsequent sequentially sampled segments of the media signal;
• and
• associating each given fingerprint of the subsequent sequence of monitored fingerprints with respective timestamps corresponding to the sampled segment of the media signal used to generate the given fingerprint.

A non-transitory computer readable medium comprising computer readable instructions that, when executed by at least one processor of a meter device, cause performance of:

• generating an initial sequence of monitored fingerprints at an initial sampling rate from initial sequentially sampled segments of a media signal corresponding to media presented by a media presentation device, wherein the initial sequentially sampled segments are separated in time by an initial sampling interval corresponding to the initial sampling rate;
• while generating the initial sequence of monitored fingerprints, measuring one or more characteristics of the media signal;
• determining, based on the measured one or more characteristics of the media signal, an adjusted sampling rate different from the initial sampling rate;
• generating a subsequent sequence of monitored fingerprints at the adjusted sampling rate from subsequent sequentially sampled segments of the media signal;
• and
• associating each given fingerprint of the subsequent sequence of monitored fingerprints with respective timestamps corresponding to the sampled segment of the media signal used to generate the given fingerprint.

A method comprising:

• generating an initial sequence of monitored fingerprints at an initial sampling rate from initial sequentially sampled segments of a media signal corresponding to media presented by a media presentation device, wherein the initial sequentially sampled segments are separated in time by an initial sampling interval corresponding to the initial sampling rate;
• while generating the initial sequence of monitored fingerprints, measuring one or more characteristics of the media signal;
• determining, based on the measured one or more characteristics of the media signal, an adjusted sampling rate different from the initial sampling rate;
• generating a subsequent sequence of monitored fingerprints at the adjusted sampling rate from subsequent sequentially sampled segments of the media signal;
• and
• associating each given fingerprint of the subsequent sequence of monitored fingerprints with respective timestamps corresponding to the sampled segment of the media signal used to generate the given fingerprint.