Method and device for generating and detecting a fingerprint functioning as a trigger marker in a multimedia signal
A device is configured to perform a method that detects a trigger marker for an action corresponding to a segment of a multimedia signal. A fingerprint is generated based on the segment of the multimedia signal at a trigger time point. The generated fingerprint is stored in a database and communicated to the device. During playback of the multimedia signal, fingerprints of segments of the multimedia signal are generated and matched against fingerprints in the database. When a match is found, one or more associated actions for the segment are retrieved by the device. The trigger time point may be determined as a time point near or at the segment of the multimedia signal with the matched fingerprint. In this way, trigger markers for actions may be enabled without modifying the multimedia signal.
1. A method comprising:
receiving, by a signal receiver of a media playback device, a first media stream;
playing back, on a display associated with the media playback device, the first media stream;
determining, by a processor of the media playback device, a trigger fingerprint from a segment of the first media stream, wherein the trigger fingerprint is a representation of features of the segment;
matching the trigger fingerprint to a reference fingerprint, wherein the reference fingerprint is stored in a database of reference fingerprints and is associated with a reference action, and wherein the reference action:
is associated with a time point indicating when, in the first media stream, the reference action is to be performed; and
instructs the media playback device to replace playback of the first media stream with playback of a second media stream; and
responsive to matching the trigger fingerprint to the reference fingerprint, playing back, on the display associated with the media playback device, the second media stream in place of the first media stream.
2. The method of claim 1 , wherein the playing back of the second media stream in place of the first media stream occurs at the time point.
3. The method of claim 1 , wherein the trigger fingerprint is one of a plurality of trigger fingerprints determined from respective segments of the first media stream.
4. The method of claim 1 , further comprising:
before determining the trigger fingerprint, receiving, by the media playback device, a plurality of reference fingerprints that includes the matched reference fingerprint.
5. The method of claim 4 , further comprising:
storing the received reference fingerprints at the media playback device for comparison with the trigger fingerprint.
6. The method of claim 5 , further comprising:
receiving, by the media playback device, for each of the received reference fingerprints, representations of one or more actions with which the received reference fingerprint is associated; and
storing each of the received representations in association with its respectively associated reference fingerprint.
7. A method comprising:
receiving, by a signal receiver of a computing system, a first media stream;
determining, by a processor of the computing system, a reference fingerprint from a segment of the first media stream, the reference fingerprint associated with a reference action that is associated with a time point that indicates when, in the first media stream, the reference action is to be performed; and
transmitting, by the processor of the computing system, the reference fingerprint and the reference action to a media playback device, wherein reception of the reference fingerprint and the reference action result in the media playback device:
matching the reference fingerprint to a trigger fingerprint, wherein the trigger fingerprint was generated by the media playback device during playback of the segment of the first media stream, and wherein the trigger fingerprint is a representation of features of the segment of the first media stream; and
performing the reference action, wherein performance of the reference action causes the media playback device to play back a second media stream in place of the first media stream.
8. The method of claim 7 , wherein the playing back of the second media stream in place of the first media stream occurs at the time point.
9. The method of claim 7 , wherein the trigger fingerprint is one of a plurality of trigger fingerprints determined from respective segments of the first media stream.
10. The method of claim 7 , further comprising:
before determining the trigger fingerprint, transmitting, to the media playback device, a plurality of reference fingerprints that includes the matched reference fingerprint.
11. The method of claim 10 , wherein:
storage of the transmitted reference fingerprints at the media playback device for comparison with the trigger fingerprint results.
12. The method of claim 10 , further comprising:
transmitting, to the media playback device, for each of the transmitted reference fingerprints, representations of one or more actions with which the transmitted reference fingerprint is associated.
13. A media playback device comprising:
a memory that stores instructions;
a database that stores reference fingerprints and reference actions;
a media signal receiver configured to receive a first media stream;
one or more processors configured by the instructions to perform operations comprising:
playing back, on a display, the first media stream;
determining a trigger fingerprint from a segment of the first media stream,
wherein the trigger fingerprint is a representation of features of the segment;
matching the trigger fingerprint to a reference fingerprint stored in the database, wherein the reference fingerprint is associated with a reference action, and wherein the reference action:
is associated with a time point indicating when, in the first media stream, the reference action is to be performed; and
instructs the media playback device to replace playback of the first media stream with playback of a second media stream; and
responsive to matching the trigger fingerprint to the reference fingerprint, playing back, on the display, the second media stream in place of the first media stream.
14. The media playback device of claim 13 , wherein the playing back of the second media stream in place of the first media stream occurs at the time point.
15. The media playback device of claim 13 , wherein the trigger fingerprint is one of a plurality of trigger fingerprints determined from respective segments of the first media stream.
16. The media playback device of claim 13 , wherein the operations further comprise:
before determining the trigger fingerprint, receiving, by the media playback device a plurality of reference fingerprints that includes the matched reference fingerprint.
17. The media playback device of claim 16 , wherein the operations further comprise:
storing the received reference fingerprints at the media playback device for comparison with the trigger fingerprint.
18. The media playback device of claim 17 , wherein the operations further comprise:
receiving, by the media playback device, for each of the received reference fingerprints, representations of one or more actions with which the received reference fingerprint is associated; and
storing each of the received representations in association with its respectively associated reference fingerprint.