Systems and methods for gathering research data

A method to monitor presentation of media, the method comprising:

• determining, with a processor, first frequency-domain data from time-domain audio data corresponding to the media, the first frequency-domain data comprising first frequency band values associated with respective first frequency bands;
• combining, with the processor, respective ones of the first frequency band values associated with contiguous groups of the first frequency bands to determine second frequency-domain data comprising second frequency band values associated with respective second frequency bands;
• processing, with the processor, the first frequency-domain data to obtain a code included in an audio portion of the media;
• and
• processing, with the processor, the second frequency-domain data to obtain a signature representative of the audio portion of the media.

A tangible machine readable storage device or storage disk comprising machine readable instructions which, when executed, cause a machine to at least:

• determine first frequency-domain data from time-domain audio data corresponding to a presentation of media, the first frequency-domain data comprising first frequency band values associated with respective first frequency bands;
• combine respective ones of the first frequency band values associated with contiguous groups of the first frequency bands to determine second frequency-domain data comprising second frequency band values associated with respective second frequency bands;
• process the first frequency-domain data to obtain a code included in an audio portion of the media;
• and
• process the second frequency-domain data to obtain a signature representative of the audio portion of the media.

An apparatus comprising:

• a processor to:
• determine first frequency-domain data from time-domain audio data corresponding to a presentation of media, the first frequency-domain data comprising first frequency band values associated with respective first frequency bands;
• combine respective ones of the first frequency band values associated with contiguous groups of the first frequency bands to determine second frequency-domain data comprising second frequency band values associated with respective second frequency bands;
• process the first frequency-domain data to obtain a code included in an audio portion of the media;
• and
• process the second frequency-domain data to obtain a signature representative of the audio portion of the media;
• and
• a memory to store the code and the signature.