WO2002023883A3 - Watermarking in the time-frequency domain - Google Patents

Watermarking in the time-frequency domain Download PDF

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Publication number
WO2002023883A3
WO2002023883A3 PCT/US2001/028927 US0128927W WO0223883A3 WO 2002023883 A3 WO2002023883 A3 WO 2002023883A3 US 0128927 W US0128927 W US 0128927W WO 0223883 A3 WO0223883 A3 WO 0223883A3
Authority
WO
WIPO (PCT)
Prior art keywords
time
frequency domain
watermarking
media
signal
Prior art date
Application number
PCT/US2001/028927
Other languages
French (fr)
Other versions
WO2002023883A2 (en
Inventor
Brett T Hannigan
Kenneth L Levy
Original Assignee
Digimarc Corp
Brett T Hannigan
Kenneth L Levy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Digimarc Corp, Brett T Hannigan, Kenneth L Levy filed Critical Digimarc Corp
Priority to AU2001291004A priority Critical patent/AU2001291004A1/en
Publication of WO2002023883A2 publication Critical patent/WO2002023883A2/en
Publication of WO2002023883A3 publication Critical patent/WO2002023883A3/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • G06T1/0021—Image watermarking
    • G06T1/0028—Adaptive watermarking, e.g. Human Visual System [HVS]-based watermarking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/46—Embedding additional information in the video signal during the compression process
    • H04N19/467—Embedding additional information in the video signal during the compression process characterised by the embedded information being invisible, e.g. watermarking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/835—Generation of protective data, e.g. certificates
    • H04N21/8358—Generation of protective data, e.g. certificates involving watermark
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2201/00—General purpose image data processing
    • G06T2201/005—Image watermarking
    • G06T2201/0052—Embedding of the watermark in the frequency domain

Abstract

Methods and systems for time-frequency domain watermarking of media signals, such as audio and video signals. An encoding method divides the media signal into segments (Fig.4A, element 401), transforms each segment into a time-frequency representation (Fig.4A, element 403), and computes a time-frequency domain watermark signal based on the time frequency representation (Fig.4A, element 404). It then combines the time-frequency domain watermark signal with the media signal to produce a watermarked media signal (Fig.4A, element 405).
PCT/US2001/028927 2000-09-14 2001-09-13 Watermarking in the time-frequency domain WO2002023883A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001291004A AU2001291004A1 (en) 2000-09-14 2001-09-13 Watermarking in the time-frequency domain

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/661,900 US6674876B1 (en) 2000-09-14 2000-09-14 Watermarking in the time-frequency domain
US09/661,900 2000-09-14

Publications (2)

Publication Number Publication Date
WO2002023883A2 WO2002023883A2 (en) 2002-03-21
WO2002023883A3 true WO2002023883A3 (en) 2002-06-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/028927 WO2002023883A2 (en) 2000-09-14 2001-09-13 Watermarking in the time-frequency domain

Country Status (2)

Country Link
US (4) US6674876B1 (en)
WO (1) WO2002023883A2 (en)

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