Method and apparatus for selection of content from a stream of data
View Patent ↗A main stream contains successive content elements of video and/or audio information that encode video and/or audio information at a first data rate. A computation circuit ( 144 ) computes main fingerprints from the successive content elements. A reference stream is received having a second data rate lower than the first data rate. The reference stream defines a sequence of the reference fingerprints. A comparator unit ( 144 ) compares the main fingerprints with the reference fingerprints. The main stream is monitored for the presence of inserted content elements between original content elements, where the original content elements have main fingerprints that match successive reference fingerprints and the inserted content elements have main fingerprints that do not match reference fingerprints. Rendering of inserted content elements to be skipped. In an embodiment when more than one content element matches only one is rendered. In another embodiment matching is used to control zapping to or from the main stream. In another embodiment matching is used to control linking of separately received mark-up information such as subtitles to points in the main stream.
1. An apparatus comprising:
a processor configured by a comparator unit to:
receive a main datastream and a reference datastream,
the main datastream including main content elements intermixed with inserted content elements,
the reference datastream having a different data rate than the main datastream and including reference fingerprints of the main content elements of the main datastream;
compute main fingerprints from at least some of the main content elements included in the main datastream; and
a control unit configured to select the main content elements from the main datastream based on a comparison of the main fingerprints to the reference fingerprints.
2. The apparatus of claim 1 , wherein:
the reference datastream includes no fingerprints of the inserted content elements that are included in the main datastream.
3. The apparatus of claim 2 , wherein:
the control unit is configured to cause a channel selector to skip the main datastream during a channel change in response to the reference datastream including no fingerprints of the inserted content elements.
4. The apparatus of claim 1 , wherein:
the main fingerprints match the reference fingerprints; and
the control unit is configured to include the main content elements in a rendering of the main datastream in response to the main fingerprints matching the reference fingerprints.
5. The apparatus of claim 1 , wherein:
the main fingerprints mismatch the reference fingerprints; and
the control unit is configured to exclude the main content elements from a rendering of the main datastream in response to the main fingerprints mismatching the reference fingerprints.
6. The apparatus of claim 1 , wherein:
the comparator unit configures the processor to detect duplicate main fingerprints that match one of the reference fingerprints,
one of the duplicate main fingerprints being computed from a main content element among the main content elements;
the control unit is configured to exclude the main content element from a rendering of the main datastream in response to the detecting of the duplicate main fingerprints.
7. The apparatus of claim 1 further comprising:
a channel selection unit configured to switch a rendering of the main datastream to render a further datastream in response to a determination that the main fingerprints mismatch the reference fingerprints.
8. The apparatus of claim 7 , wherein:
the channel selection unit is configured to restore the rendering of the main datastream in response to a further determination that further main fingerprints match further reference fingerprints.
9. The apparatus of claim 1 , wherein:
the main fingerprints match the reference fingerprints; and the apparatus further comprises
a storage device configured to store the main content elements as a data-reduced version of the main datastream without the inserted content elements.
10. The apparatus of claim 1 , wherein:
the reference datastream further contains mark-up information along with the low resolution versions of the main content elements;
the main fingerprints match the reference fingerprints; and the apparatus further comprises:
a storage device configured to store the received mark-up information with links that correlate the mark-up information to the main content elements.
11. The apparatus of claim 10 , wherein:
the mark-up information includes at least one of sub-title, an alternative language channel, a menu, or a chapter marker.
12. The apparatus of claim 1 , wherein:
the comparator unit configures the processor to receive the main datastream and the reference datastream from mutually different distribution media.
13. The apparatus of claim 1 , wherein:
the main content elements include segments of a motion picture; and
the inserted content elements include commercials.
14. A method comprising:
receiving a main datastream and a reference datastream,
the main datastream including main content elements intermixed with inserted content elements,
the reference datastream having a different data rate than the main datastream and including reference fingerprints of the main content elements of the main datastream;
using a processor, computing main fingerprints from at least some of the main content elements included in the main datastream; and
select the main content elements from the main datastream based on a comparison of the main fingerprints to the reference fingerprints.
15. The method of claim 14 , wherein:
the reference datastream contains no fingerprints of the inserted content elements contained in the main datastream.
16. The method of claim 14 , wherein:
the selecting of the main content elements is based on a determination that the main fingerprints match the reference fingerprints; and the method further comprises
including the main content elements in a rendering of the main datastream in response to the main fingerprints matching the reference fingerprints.
17. The method of claim 14 , wherein:
the selecting of the main content elements is based on a determination that the main fingerprints mismatch the reference fingerprints; and the method further comprises
excluding the main content elements from a rendering of the main datastream in response to the main fingerprints mismatching the reference fingerprints.
18. The method of claim 14 , wherein:
detecting duplicate main fingerprints that match one of the reference fingerprints,
one of the duplicate main fingerprints being computed from a main content element among the main content elements;
excluding the main content element from a rendering of the main datastream in response to the detecting of the duplicate main fingerprints.
19. The method of claim 14 , wherein:
switching a rendering of the main datastream to render a further datastream in response to a determination that the main fingerprints mismatch the reference fingerprints.
20. The method of claim 19 , wherein:
restoring the rendering of the main datastream in response to a further determination that further main fingerprints match further reference fingerprints.
21. The method of claim 14 , wherein:
the selecting of the main content elements is based on a determination that the main fingerprints match the reference fingerprints; and the method further comprises
storing the main content elements as a data-reduced version of the main datastream without the inserted content elements.
22. The method of claim 14 , wherein:
the reference datastream further contains mark-up information along with the low resolution versions of the main content elements;
the selecting of the main content elements is based on a determination that the main fingerprints match the reference fingerprints; and the method further comprises:
storing the received mark-up information with links that correlate the mark-up information to the main content elements.
23. A non-transitory machine-readable storage medium comprising instructions that, when executed by one or more processors of a machine, cause the machine to perform operations comprising:
receiving a main datastream and a reference datastream,
the main datastream including main content elements intermixed with inserted content elements,
the reference datastream having a different data rate than the main datastream and including reference fingerprints of the main content elements of the main datastream;
computing main fingerprints from at least some of the main content elements included in the main datastream; and
selecting the main content elements from the main datastream based on a comparison of the main fingerprints to the reference fingerprints.
24. An apparatus comprising:
a processor configured by a comparator unit to:
receive a main datastream and a reference datastream,
the main datastream including main content elements intermixed with inserted content elements,
the reference datastream including low resolution versions of the main content elements of the main datastream;
compute main fingerprints from at least some of the main content elements; and
compute reference fingerprints from at least some of the low resolution versions of the main content elements; and
a control unit configured to select the main content elements from the main datastream based on whether the main fingerprints match the reference fingerprints computed from the low resolution versions contained in the reference datastream.
25. The apparatus of claim 24 , wherein:
the main fingerprints mismatch the reference fingerprints; and
the control unit is configured to exclude the main content elements from a rendering of the main datastream in response to the main fingerprints mismatching the reference fingerprints.
26. The apparatus of claim 24 , wherein:
the comparator unit configures the processor to detect duplicate main fingerprints that match one of the reference fingerprints,
one of the duplicate main fingerprints being computed from a main content element among the main content elements; and
the control unit is configured to exclude the main content element from a rendering of the main datastream in response to the detecting of the duplicate main fingerprints.
27. The apparatus of claim 24 further comprising:
a channel selection unit configured to switch a rendering of the main datastream to render a further datastream in response to a determination that the main fingerprints mismatch the reference fingerprints.
28. The apparatus of claim 24 , wherein:
the reference datastream contains no low resolution versions of the inserted content elements included in the main datastream.