Media channel identification with video multi-match detection and disambiguation based on audio fingerprint

1. A method comprising:

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

responsive to at least determining that the digital video fingerprint matches the multiple reference video fingerprints each corresponding with a different respective channel, performing disambiguation by the computing system based at least in part on a determination that a digital audio fingerprint of the media content being rendered by the media presentation device matches a reference audio fingerprint corresponding with just a single channel of the channels with which the multiple reference video fingerprints correspond, the disambiguation establishing that the media presentation device is receiving the media content on the single channel; 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 media content being rendered by the media presentation device has a video track and an audio track, wherein the digital video fingerprint is a fingerprint of the video track and the digital audio fingerprint is a fingerprint of the audio track.

3. The method of claim 1 , wherein the digital audio fingerprint of the media content being rendered by the media presentation device represents at least a language track of the media content being rendered by the media presentation device.

4. The method of claim 1 , wherein the computing system is an entity other than the media presentation device, and wherein the digital video fingerprint and digital audio fingerprint are generated by the media presentation device, the method further comprising:

receiving by the computing system, from the media presentation device, the digital video fingerprint and the digital audio fingerprint.

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

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

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

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

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

7. The method of claim 6 , further comprising:

comparing reference audio fingerprints corresponding with the reference video fingerprints of the flagged multi-match group;

detecting, based on the comparing, a difference between the compared reference audio fingerprints; and

responsive to detecting the difference, further flagging the multi-match group to indicate that audio-fingerprint analysis could facilitate disambiguation,

wherein performing disambiguation based on the determination that the digital audio fingerprint of the media content being rendered by the media presentation device matches a reference audio fingerprint corresponding with just a single channel is further responsive to determining that the multi-match group is further flagged to indicate that audio-fingerprint analysis could facilitate disambiguation.

8. The method of claim 1 , wherein the computing system is an entity other than the media presentation device, the method further comprising:

responsive to at least determining that the digital video fingerprint matches the multiple reference video fingerprints each corresponding with a different respective channel, requesting and receiving by the computing system from the media presentation device the digital audio fingerprint of the media content being rendered by the media presentation device, to facilitate the performing of disambiguation based on the obtained digital audio fingerprint.

9. The method of claim 1 , further comprising:

responsive to at least determining that the digital video fingerprint matches the multiple reference fingerprints each corresponding with a different channel, generating reference audio fingerprints corresponding with the channels with which the multiple reference video fingerprints correspond, to facilitate the disambiguation.

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 causing supplemental channel-specific content to be presented in conjunction with the media content being rendered by the media presentation device.

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

12. 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.

13. A non-transitory computer readable medium having stored thereon instructions executable by a processing unit to carry out operations comprising:

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

responsive to at least determining that the digital video fingerprint matches the multiple reference video fingerprints each corresponding with a different respective channel, performing disambiguation based at least in part on a determination that a digital audio fingerprint of the media content being rendered by the media presentation device matches a reference audio fingerprint corresponding with just a single channel of the channels with which the multiple reference fingerprints correspond, the disambiguation establishing that the media presentation device is receiving the media content on the single channel; and

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

14. The non-transitory computer readable medium of claim 13 , wherein the digital audio fingerprint of the media content being rendered by the media presentation device represents at least a language track of the media content being rendered by the media presentation device.

15. The non-transitory computer readable medium of claim 13 , 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.

16. The non-transitory computer readable medium of claim 13 , 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.

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, a digital video fingerprint of media content being rendered by the media presentation device,

determining that the received digital video fingerprint matches reference video fingerprints corresponding with multiple channels,

receiving from the media presentation device, via the network communication interface, a digital audio fingerprint of the media content being rendered by the media presentation device,

using the received digital audio fingerprint to determine which of the multiple channels carries the media content being rendered by the media presentation device, wherein using the received digital audio fingerprint to determine which of the multiple channels carries the media content being rendered by the media presentation device comprises determining that the received digital audio fingerprint matches a reference audio fingerprint corresponding with just a single channel of the multiple channels, and

taking action based on the determined channel.

18. The system of claim 17 , wherein the operations further comprise:

responsive to at least determining that the received matches the reference video fingerprints corresponding with the multiple channels, sending to the media presentation device a request for the digital audio fingerprint of the media content being rendered by the media presentation device,

wherein receiving from the media presentation device the digital audio fingerprint of the media content being rendered by the media presentation device occurs in response to sending the request.

19. The system of claim 17 , wherein taking action based on the determined channel 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 determined channel comprises recording presentation of the determined channel for use in a channel ratings system.