Deriving multiple identifiers from multimedia content

A method comprising:

• using a configured multi-purpose electronic processor, deriving first information from audio elements of an audio signal;
• using a configured multi-purpose electronic processor, deriving second information from data representing picture elements of a video signal that is associated with the audio signal;
• and
• utilizing the first information or the second information in a content filtering process, said content filtering process utilizes a recognition unit or device to sample content being distributed on a network, and controls further distribution of the content in the network based at least in part on the first information or the second information.

An apparatus comprising:

• electronic memory;
• and
• a multi-purpose electronic processor configured for:
• deriving first information from audio elements of an audio signal;
• deriving second information from data representing picture elements of a video signal that is associated with the audio signal;
• and
• utilizing the first information or the second information in a content filtering process to control distribution of content in the network based at least in part on the first information or the second information.