Video fingerprinting to identify video content

1. A method of video fingerprinting, the method comprising:

transforming, using a processor, an electronic video signal;

computing, using the processor, statistics for video frames in the electronic video signal; and

forming, using the processor, a fingerprint of the video as a change in the statistics over the video frames, wherein a calibration signal is used to align the video before computing the fingerprint.

2. The method of claim 1 , wherein the calibration signal comprises an embedded digital watermark in the video.

3. A non-transitory computer-readable medium having instructions stored thereon that, if executed by a computing device, cause the computing device to perform operations comprising:

transforming an electronic video signal;

computing statistics for video frames in the electronic video signal; and

forming a fingerprint of the video as a change in the statistics over the video frames, wherein a calibration signal is used to align the video before computing the fingerprint.

4. The non-transitory computer-readable medium of claim 3 , wherein the calibration signal comprises an embedded digital watermark in the video.

5. An apparatus comprising a processor configured to:

transform an electronic video signal;

compute statistics for video frames in the electronic video signal; and

form a fingerprint of the video as a change in the statistics over the video frames, wherein a calibration signal is used to align the video before computing the fingerprint.

6. The apparatus of claim 5 , wherein the calibration signal comprises an embedded digital watermark in the video.

7. A method of video fingerprinting comprising:

computing, using a processor, statistics for video frames in electronic video signals of a video; and

forming, using the processor, a fingerprint of the video as a change in the statistics over the video frames, wherein the fingerprint serves to form an index used to look up identifying metadata for the video in a metadata database, wherein the identifying metadata is associated with the index in the metadata database, and wherein a calibration signal is used to align the video before forming the fingerprint.

8. The method of claim 7 , wherein the calibration signal comprises an embedded digital watermark in the video.

9. A method of video fingerprinting comprising:

computing, using a processor, values representing motion between different portions of an electronic video signal; and

forming, using the processor, a fingerprint to identify the electronic video signal utilizing data associated with at least the values, wherein the fingerprint provides an index used to look up identifying metadata for the video in a metadata database, wherein the identifying metadata is associated with the index in the metadata database, and wherein a calibration signal is used to align the electronic video before forming the fingerprint.

10. The method of claim 9 , wherein the calibration signal comprises an embedded digital watermark in the electronic video.

11. A method of video fingerprinting comprising:

computing, using a processor, values associated with luminance for a first video portion in an electronic video signal;

computing, using the processor, values associated with luminance for a second video portion in the electronic video signal;

determining, using the processor, changes in luminance between the first video portion and the second video portion; and

forming, using the processor, a fingerprint to identify the electronic video signal based at least in part on data associated with the changes, wherein the fingerprint provides an index used to look up identifying metadata for the video in a metadata database, wherein the identifying metadata is associated with the index in the metadata database, and wherein a calibration signal is used to align the electronic video before forming the fingerprint.

12. The method of claim 11 , wherein the calibration signal comprises an embedded digital watermark in the electronic video signal.