Content identifiers triggering corresponding responses

• US 20020032864A1
• Filed: 05/14/2001
• Published: 03/14/2002
• Est. Priority Date: 05/19/1999
• Status: Active Grant

• Current Assignee: Digimarc Corporation
• Original Assignee: Digimarc Corporation
• Inventors: Levy, Kenneth L., Rhoads, Geoffrey B.
• Granted Patent: US 7,185,201 B2
• Time in Patent Office: Days
• US Class Current: 713/176
• CPC Class Codes: G06Q 30/02 Marketing; Price estimation or determination; Fundraising
• CPC Class Codes: G06T 1/0028 Adaptive watermarking, e.g. Human Visual System [HVS]-based watermarking
• CPC Class Codes: G07D 7/0034 using watermarks
• CPC Class Codes: G10H 1/0041 in coded form
• CPC Class Codes: G10H 2240/041 File watermark, i.e. embedding a hidden code in an electrophonic musical instrument file or stream for identification or authentification purposes audio watermarking G10L19/018
• CPC Class Codes: G10H 2240/061 MP3, i.e. MPEG-1 or MPEG-2 Audio Layer III, lossy audio compression
• CPC Class Codes: G10H 2240/135 Library retrieval index, i.e. using an indexing scheme to efficiently retrieve a music piece
• CPC Class Codes: G10H 2250/311 Neural networks for electrophonic musical instruments or musical processing, e.g. for musical recognition or control, automatic composition or improvisation musical analysis G10H2210/031; neural networks G06N3/02
• CPC Class Codes: G10L 15/26 Speech to text systems G10L15/08 takes precedence
• CPC Class Codes: G11B 20/00007 Time or data compression or expansion audio compression based on psychoacoustics G10L19/00; data processing for reproducing audio data at different playback speeds G10L21/04; video compression H04N19/00; data compression per se H03M7/30
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00891 embedded in audio data
• CPC Class Codes: H04H 20/31 using in-band signals, e.g. subsonic or cue signal
• CPC Class Codes: H04N 1/00005 relating to image data
• CPC Class Codes: H04N 1/00037 Detecting, i.e. determining the occurrence of a predetermined state H04N1/00031 takes precedence
• CPC Class Codes: H04N 1/00973 from a remote device, e.g. receiving via the internet instructions input to a computer terminal
• CPC Class Codes: H04N 1/32144 embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
• CPC Class Codes: H04N 1/32229 with selective or adaptive application of the additional information, e.g. in selected regions of the image H04N1/32213 takes precedence

Abstract

Fingerprint data derived from audio or other content is used as an identifier, to trigger machine responses corresponding to the content. The fingerprint can be derived from the content, and also separately encoded in a file header. Digital watermarks can also be similarly used.

Claims

1. A method comprising:

obtaining fingerprint data from a file header associated with a file, the fingerprint data being associated with contents of the file;

checking the integrity of the fingerprint data;

if the check leaves doubt about the fingerprint data thus obtained, then recalculating fingerprint data from contents of the file; and

transmitting the fingerprint data to a database.

2. The method of claim 1 that includes:

accessing a database record corresponding to the transmitted fingerprint data, to obtain associated information; and

returning at least some of said associated information to a computer device from which the fingerprint data was transmitted.

3. The method of claim 1 in which the file contents comprise audio.

4. The method of claim 1 in which checking includes checking a digital signature.

5. The method of claim 1 in which the checking includes decrypting fingerprint data from the header and authenticating the decrypted data.

6. The method of claim 5 that includes applying an inverse modification to the fingerprint in the header prior to said decrypting.

7. The method of claim 1 that includes applying an inverse modification to the fingerprint in the header.

8. A method comprising:

obtaining watermark data from a file header associated with a file, the watermark data being associated with contents of the file;

checking the integrity of the watermark data;

if the check leaves doubt about the watermark data thus obtained, then detecting watermark data from contents of the file; and

transmitting the watermark data to a database.

9. The method of claim 8 that includes:

accessing a database record corresponding to the transmitted watermark data, to obtain associated information; and

returning at least some of said associated information to a computer device from which the watermark data was transmitted.

10. The method of claim 8 in which the file contents comprise audio.

11. The method of claim 8 in which checking includes checking a digital signature.

12. The method of claim 8 in which the checking includes decrypting watermark data from the header and authenticating the decrypted data.

13. The method of claim 12 that includes applying an inverse modification to the watermark in the header prior to said decrypting.

14. The method of claim 12 that includes applying an inverse modification to the watermark in the header.