Media channel identification with multi-match detection and disambiguation based on single-match

1. A method comprising:

determining, by a computing system, that a digital fingerprint of a first segment of media content being rendered by a media presentation device matches multiple reference fingerprints each corresponding with a different respective channel;

after determining that the digital fingerprint of the first segment matches the multiple reference fingerprints each corresponding with a different respective channel, performing by the computing system disambiguation based at least in part on a determination that a digital fingerprint of a second segment of the media content being rendered by the media presentation device matches a reference fingerprint corresponding with just a single channel, the disambiguation establishing that the media presentation device is receiving the media content on the single channel, wherein the first and second segments of the media content being rendered by the media presentation device are first and second respective time segments of the media content being rendered by the media presentation device, wherein the second time segment is before the first time segment; and

taking action by the computing system based on the establishing that the media presentation device is receiving the media content on the single channel.

2. The method of claim 1 , wherein the second segment of the media content being rendered by the media presentation device comprises content selected from the group consisting of commercial content and news programming.

3. The method of claim 1 , wherein the computing system is an entity other than the media presentation device, and wherein the digital fingerprints of the first and second segments of the media content being rendered by the media presentation device are generated by the media presentation device, the method further comprising:

receiving by the computing system, from the media presentation device, the digital fingerprints of the first and second segments of the media content being rendered by the media presentation device.

4. The method of claim 1 , wherein the multiple reference fingerprints are selected from a plurality of reference fingerprints in reference data, and wherein determining that the fingerprint of the first segment of the media content being rendered by the media presentation device matches the multiple reference fingerprints comprises:

comparing the digital fingerprint of the first segment of media content being rendered by the media presentation device with the plurality of reference fingerprints in the reference data, and

based on the comparing, determining that the digital fingerprint of the first segment of the media content being rendered by the media presentation device matches the multiple reference fingerprints.

5. The method of claim 1 , further comprising detecting and flagging a multi-match group comprising the multiple reference fingerprints,

wherein determining that the digital fingerprint of the first segment of the media content being rendered by the media presentation device matches the multiple reference fingerprints comprises determining that the digital fingerprint of the first segment of the media content being rendered by the media presentation device matches the reference fingerprints of the flagged multi-match group.

6. The method of claim 1 , further comprising making the determination that the digital fingerprint of the second segment of the media content being rendered by the media presentation device matches a reference fingerprint corresponding with just the single channel, wherein making the determination comprises:

comparing the digital fingerprint of the second segment of the media content being rendered by the media presentation device with at least each of reference fingerprint of the multiple reference fingerprints, and

based on the comparing, determining that the digital fingerprint of the second segment of the media content being rendered by the media presentation device matches just a single one of the multiple reference fingerprints.

7. The method of claim 1 , wherein the reference fingerprint corresponding with just the single channel comprises a reference fingerprint representing channel-distinguishing content specific to the single channel, the method further comprising:

making the determination that the digital fingerprint of the second segment of the media content being rendered by the media presentation device matches the reference fingerprint corresponding with just the single channel, wherein making the determination comprises comparing the digital fingerprint of the second segment of the media content being rendered by the media presentation device with the reference fingerprint representing the channel-distinguishing content.

8. The method of claim 1 , wherein taking action based on the establishing that the media presentation device is receiving the media content on the single channel comprises causing supplemental channel-specific content to be presented in conjunction with the media content being rendered by the media presentation device.

9. The method of claim 1 , carried out at least in part by the media presentation device.

10. The method of claim 1 , wherein taking action based on the establishing that the media presentation device is receiving the media content on the single channel comprises recording presentation of the single channel for use in a channel ratings system.

11. A method comprising:

comparing, by a computing system, (i) query digital fingerprint data representing sequential time segments of media content being rendered by a media presentation device with (ii) reference fingerprint data respectively for each of a plurality of known channels of media content;

based on the comparing with respect to a first one or more of the time segments of the media content being rendered by the media presentation device, detecting by the computing system a multi-match, where the media content rendered by the media presentation device matches multiple ones of the plurality of channels of media content;

based on the comparing with respect to a second one or more of the time segments of the media content being rendered by the media presentation device, detecting by the computing system a single-match, where the media content rendered by the media presentation device matches just a single one of the multiple channels of media content, wherein each of the second time one or more segments is before each of the first one or more time segments;

using by the computing system the detected single-match to disambiguate the detected multi-match, establishing that the single channel of media content is the channel carrying the media content being rendered by the media presentation device; and

taking action by the computing system based on the establishing that the single channel is the channel carrying the media content being rendered by the media presentation device.

12. The method of claim 11 , wherein the single-match is with respect to media content selected from the group consisting of commercial content and news programming.

13. The method of claim 11 , wherein taking action based on the establishing that the single channel is the channel carrying the media content being rendered by the media presentation device comprises causing supplemental channel-specific content to be presented in conjunction with the media content being rendered by the media presentation device.

14. The method of claim 11 , carried out at least in part by the media presentation device.

15. The method of claim 14 , further comprising the media presentation device accessing reference data for the multiple channels, to facilitate disambiguating the detected multi-match.

16. The method of claim 11 , wherein taking action based on the establishing that the single channel is the channel carrying the media content being rendered by the media presentation device comprises recording presentation of the single channel for use in a channel ratings system.

17. A system comprising:

a network communication interface;

a processing unit;

non-transitory data storage; and

program instructions stored in the non-transitory data storage and executable by the processing unit to carry out operations including:

receiving from a media presentation device, via the network communication interface, first digital fingerprint data representing first one or more segments of media content being rendered by the media presentation device,

determining that the received first digital fingerprint data matches multiple reference fingerprints each corresponding with a different respective channel,

after determining that the received first digital fingerprint data matches the multiple reference fingerprints each corresponding with a different respective channel, performing disambiguation based at least in part on an earlier determination that second digital fingerprint data representing second one or more segments of the media content being rendered by the media presentation device matches a reference fingerprint corresponding with just a single channel, the disambiguation establishing that the single channel carries the media content being rendered by the media presentation device, and

taking action based on the establishing that the single channel carries the media content being rendered by the media presentation device.

18. The system of claim 17 , wherein the second one or more segments of the media content being rendered by the media presentation device comprises media content selected from the group consisting of commercial content and news programming.

19. The system of claim 17 , wherein taking action based on the establishing that the single channel carries the media content being rendered by the media presentation device comprises causing supplemental channel-specific content to be presented in conjunction with the media content being rendered by the media presentation device.

20. The system of claim 17 , wherein taking action based on the establishing that the media presentation device is receiving the media content on the single channel comprises recording presentation of the single channel for use in a channel ratings system.