Identification of digital data sequences

• US 20050273612A1
• Filed: 06/26/2003
• Published: 12/08/2005
• Est. Priority Date: 07/26/2002
• Status: Abandoned Application

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Bruekers, Alphons Antonius Maria Lambertus, Van Der Veen, Minne
• Application Number:
  US10/521,848
• Publication Number:
  US 20050273612A1
• Time in Patent Office: Days
• US Class Current: 713/176
• CPC Class Codes: G06T 1/0021 Image watermarking
• CPC Class Codes: G10L 19/018 Audio watermarking, i.e. embedding inaudible data in the audio signal
• CPC Class Codes: G10L 25/48 specially adapted for particular use
• CPC Class Codes: G11B 20/00884 involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm

Abstract

Identification of a digital media sequence is performed by an encoding and a decoding process. A sequence is received and its digital fingerprint is computed. A database lookup based on the fingerprint produces one or more matches that all resemble the computed fingerprint to a certain degree. If there is more than one match, at least one attempt is made to detect a watermark in the sequence. If a watermark is found, at least part of the watermark is extracted and used to select one of the matches among the sequences that resemble the media sequence to be identified.

Claims

1. A method for identifying a first digital data sequence, comprising:

calculating a first digital fingerprint based on at least part of the first sequence,

comparing the first fingerprint with at least a second fingerprint associated with at least a second digital data sequence,

depending on a result of the comparison, comparing at least one digital watermark associated with the respective first and second data sequences and thereby establishing an identity of the first data sequence.

2. A method according to claim 1, further comprising:

calculating the at least one digital watermark, where the calculation is dependent on information contained in the first fingerprint.

3. A method according to claim 1, further comprising:

calculating the at least one digital watermark, where the calculation is dependent on information resulting from the comparison between the first fingerprint and the second fingerprint.

7. A computer program including software instructions for controlling a computer to perform a method according to claim 1.

4. A system for identifying a first digital data sequence, comprising means for:

calculating a first digital fingerprint based on at least part of the first sequence,

comparing the first fingerprint with at least a second fingerprint associated with at least a second digital data sequence,

depending on a result of the comparison, comparing at least one digital watermark associated with the respective first and second data sequences and thereby establishing an identity of the first data sequence.

5. A system according to claim 4, further comprising means for:

calculating the at least one digital watermark, where the calculation is dependent on information contained in the first fingerprint.

6. A system according to claim 4, further comprising means for:

calculating the at least one digital watermark, where the calculation is dependent on information resulting from the comparison between the first fingerprint and the second fingerprint.

8. A method for enabling identification of a first digital data sequence, comprising:

calculating a first digital fingerprint based on at least part of the first sequence,

comparing the first fingerprint with at least a second fingerprint associated with at least a second digital data sequence,

depending on a result of the comparison, storing at least one digital watermark associated with the first data sequence, thereby providing information enabling identification of the first data sequence.

9. A method according to claim 8, further comprising:

calculating the at least one digital watermark, where the calculation is dependent on information contained in the first fingerprint.

10. A method according to claim 8, further comprising:

calculating the at least one digital watermark, where the calculation is dependent on information resulting from the comparison between the first fingerprint and the second fingerprint.

14. A computer program including software instructions for controlling a computer to perform a method according to claim 8.

11. A system for enabling identification of a first digital data sequence, comprising means for:

calculating a first digital fingerprint based on at least part of the first sequence,

comparing the first fingerprint with at least a second fingerprint associated with at least a second digital data sequence,

depending on a result of the comparison, storing at least one digital watermark associated with the first data sequence, thereby providing information enabling identification of the first data sequence.

12. A system according to claim 11, further comprising means for:

calculating the at least one digital watermark, where the calculation is dependent on information contained in the first fingerprint.

13. A system according to claim 11, further comprising means for:

calculating the at least one digital watermark, where the calculation is dependent on information resulting from the comparison between the first fingerprint and the second fingerprint.