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Method and apparatus for content item signature matching

A content item, signature matching technology, applied in the direction of selective content distribution, program/content distribution protection, data processing applications, etc., can solve the problems of increasing system cost and complexity, insufficient improvement, etc., to improve signature matching operation, improve Search speed, effect of shortening search time

Inactive Publication Date: 2007-05-02
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0017] While pruning does improve search speed, the improvement is not enough
Additionally, pruning increases system cost and complexity, since for each entry the distances to all anchors need to be stored

Method used

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  • Method and apparatus for content item signature matching

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Embodiment Construction

[0058] The following description focuses on embodiments of the present invention that are applicable to fingerprint matching of audiovisual content items, but it should be understood that the present invention is not limited to this application, but can be used in many other applications, including watermark matching.

[0059] Fig. 1 shows an apparatus for content item signature matching according to an embodiment of the present invention.

[0060] The device 101 comprises a database 103 which stores fingerprints for a plurality of items of audiovisual content. As a particular example, a database may store fingerprints for a large number of music clips (like MP3 encoded songs). In a particular embodiment, a database stores fingerprints and associated data for each content item. Any suitable associated data may be stored, and in a particular embodiment, the database stores at least the song title, artist, length, which album the song is from, and associated album art.

[0061...

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Abstract

An apparatus for content item signature matching comprises a database ( 103 ) which has signatures for a plurality of content items. A likelihood processor ( 105 ) determines a match likelihood indication for the content items where the match likelihood indication is indicative of a likelihood of a match between the content item and an unknown signature. An interface ( 111 ) receives a query signature associated with a content item and in response a search processor ( 113 ) searches the database ( 103 ) for a matching signature to the query signature. The search processor ( 113 ) is operable to search the database in response to the match likelihood indication of the plurality of content items. In particular the database ( 103 ) may be ordered in order of decreasing probability of a match and the search processor ( 113 ) may search the database in this order. Hence, the probability of an early match is increased and the average search time is reduced.

Description

technical field [0001] The present invention relates to methods and apparatus for content item signature matching, particularly but not limited to finding matching fingerprints in a database. Background technique [0002] Illegal distribution of copyrighted material deprives the copyright owner of the legal copyright to that material and generates revenue for the provider of the illegally distributed material, thereby condoning the continued illegal distribution. Where delivery is facilitated, for example, over the Internet, content material that requires copyright protection, such as artwork or other material with limited distribution rights, is susceptible to illegal distribution on a large scale. [0003] In particular, content items, such as music or video items, currently attract numerous unauthorized distributions and copies. This is due in part to the increasing availability and feasibility of distribution and copying made possible by new technologies. For example, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/00G06F17/30G06F21/10H04N7/173
CPCH04N7/17318H04N21/23109G06F17/30858H04N21/44008G06F17/30825H04N21/6582H04N21/4627G06F21/10G06F16/7328G06F16/71H04N21/8358G06Q50/10
Inventor J·C·奥斯特韦恩M·巴比里
Owner KONINK PHILIPS ELECTRONICS NV
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