Media monitoring using multiple types of signatures

A media monitoring method comprising:

• in response to determining that a media signature of a first type reported by a device meter matched a reference signature of the first type associated with first reference media, sending, by executing an instruction with a processor, a first indication to the device meter to indicate that media monitored by the device meter corresponds to the first reference media, and sending, by executing an instruction with a processor, a set of reference signatures of a second type associated with the first reference media to the device meter;
• receiving a second indication from the device meter indicating that the media monitored by the device meter no longer corresponds to the first reference media;
• and
• in response to receiving the second indication, processing, with the processor, subsequent media signatures of the first type reported by the device meter to identify the media being monitored by the device meter.

A non-transitory computer readable medium comprising computer readable instructions that, when executed by a processor, cause the processor to at least:

• in response to determining that a media signature of a first type reported by a device meter matched a reference signature of the first type associated with first reference media, send a first indication to the device meter to indicate that media monitored by the device meter corresponds to the first reference media, and send a set of reference signatures of a second type associated with the first reference media to the device meter;
• receive a second indication from the device meter indicating that the media monitored by the device meter no longer corresponds to the first reference media;
• and
• in response to receiving the second indication, process subsequent media signatures of the first type reported by the device meter to identify the media being monitored by the device meter.