Patent ID: 11956486
Assignee: THE NIELSEN COMPANY (US), LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A system comprising:
a processor;
a memory;
instructions stored in the memory, the instructions to cause the processor to:
generate a signature of audio obtained from a media device during a time period;
determine whether the generated signature matches at least one reference signature;
determine an on/off state of the media device based on a gain level applied by an automatic gain controller during collection of the audio;
credit the media device with presenting media during the time period in response to the generated signature matching the at least one reference signature and the on/off state determined for the media device being an on state; and
credit the media device with presenting media during the time period in response to the generated signature matching the at least one reference signature and the on/off state determined for the media device being an off state.