Patent ID: 9003443
Filing Date: 2015-04-07
Classification: H04N

Abstract:
1. A method of operation of at least one device in a content delivery system, the method comprising: monitoring an audio channel for subaudible tones associated with respective ones of at least some of a plurality of media content segments on the audio channel, by the at least one device; in response to at least some of the subaudible tones, causing at least one of a modifying or an adding of metadata to a delivery of the media content segment associated with the respective subaudible tone, by the at least one device; and providing the metadata to an advertisement injection system located relatively downstream of the at least one device which causes the advertisement injection system to pass the respective content segment without modification of any attributes thereof, by the at least one device, wherein responsive to an absence of the provided metadata the advertisement injection system modifies at least one attribute of the respective content segment.