Content-modification system with transmission delay-based feature

A non-transitory computer-readable storage medium, having stored thereon program instructions that, upon execution by a processor, cause performance of a set of operations comprising:

• receiving, by a fingerprint-matching server, query fingerprint data representing content received by a content-presentation device;
• determining, by the fingerprint-matching server, a content-transmission delay between a content-distribution system and the content-presentation device;
• based on historical content consumption data for the content-presentation device, determining, by the fingerprint-matching server, a type of content historically received by the content-presentation device;
• using, by the fingerprint-matching server, at least the determined content-transmission delay and the determined type of content as a basis to select, from among a plurality of reference fingerprint data sets, a reference fingerprint data set that mapping data maps to the determined content-transmission delay and the determined type of content;
• detecting, by the fingerprint-matching server, a match between the query fingerprint data and at least a portion of reference fingerprint data in the selected reference fingerprint data set, wherein the at least a portion of reference fingerprint data in the selected reference fingerprint data set corresponds with a channel;
• based on the match, identifying, by the fingerprint-matching server, the channel as being the one on which the content-presentation device is receiving content;
• and
• responsive to detecting the match, causing, by the fingerprint-matching server, the content-presentation device to perform a content-modification operation in connection with a content-modification opportunity identified on the identified channel.

A fingerprint-matching server comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium, having stored thereon program instructions that, upon execution by the processor, cause performance of a set of operations comprising:
• receiving query fingerprint data representing content received by a content-presentation device;
• determining a content-transmission delay between a content-distribution system and the content-presentation device;
• based on historical content consumption data for the content-presentation device, determining a type of content historically received by the content-presentation device;
• using at least the determined content-transmission delay and the determined type of content as a basis to select, from among a plurality of reference fingerprint data sets, a reference fingerprint data set that mapping data maps to the determined content-transmission delay and the determined type of content;
• detecting a match between the query fingerprint data and at least a portion of reference fingerprint data in the selected reference fingerprint data set, wherein the at least a portion of reference fingerprint data in the selected reference fingerprint data set corresponds with a channel;
• based on the match, identifying, by the fingerprint-matching server, the channel as being the one on which the content-presentation device is receiving content;
• and
• responsive to detecting the match, causing, by the fingerprint-matching server, the content-presentation device to perform a content-modification operation in connection with a content-modification opportunity identified on the identified channel.