Eugene T Lin

US Patent:

6912658, Jun 28, 2005

Filed:

Aug 21, 1998

Appl. No.:

09/485759

Inventors:

Jordan J. Glogau - Nanuet NY, US
Raymond B. Wolfgang - Exton PA, US
Eugene Ted Lin - West Lafayette IN, US

Assignee:

Purdue Research Foundation - West Lafayette IN

International Classification:

H04L009/00

US Classification:

713176, 380 43

Abstract:

A method of data hiding includes providing a message (), providing an encrypting sequence (), and generating an encrypted message () based on the message and the encrypting sequence. A carrier signal () that conveys information unrelated to the encrypted message is provided, and the encrypted message is embedded () into the carrier signal by performing an exclusive-OR of the encrypted message with a first portion of the carrier signal.

US Patent:

7567721, Jul 28, 2009

Filed:

Aug 6, 2003

Appl. No.:

10/636505

Inventors:

Adnan M. Alattar - Tigard OR, US
Eugene T. Lin - West Lafayette IN, US
Mehmet Celik - Rochester NY, US

Assignee:

Digimarc Corporation - Beaverton OR

International Classification:

G06K 9/00
G06K 9/36
G06K 9/46
G06K 9/64

US Classification:

382248, 382100, 382239, 382278

Abstract:

Methods for embedding digital watermarks in compressed video include perceptual adapting a digital watermark in predicted and non-predicted data based on block activity derived from the compressed video stream, embedding in predicted objects in a video stream having separately compressed video objects, and bit rate control of watermarked video.

US Patent:

7840005, Nov 23, 2010

Filed:

Jan 20, 2005

Appl. No.:

11/040168

Inventors:

Edward J. Delp - West Lafayette IN, US
Eugene T. Lin - West Lafayette IN, US

Assignee:

Digimarc Corporation - Beaverton OR

International Classification:

H04N 7/167

US Classification:

380201, 380205, 380221, 382100, 382202, 382239, 382269, 713176

Abstract:

A method for synchronization of a media signal computes features of the media signal and determines redundancy of the features to establish synchronization. The synchronization method is adapted for both temporal and spatial synchronization. For spatial synchronization, spatial redundancy is used to detect geometric distortion of a signal using an autocorrelation method to detect peaks caused by the redundancy of features of the signal. These peaks are then analyzed with a histogram method to detect rotation and scaling of the host media signal. The spatial synchronization process is applied for both intra-coded frames of video (I-frames) as well as still images.

US Patent:

7886151, Feb 8, 2011

Filed:

Jan 21, 2003

Appl. No.:

10/349322

Inventors:

Edward J. Delp - West Lafayette IN, US
Eugene T. Lin - Herndon VA, US

Assignee:

Purdue Research Foundation - West Lafayette IN

International Classification:

H04L 9/32

US Classification:

713176, 380 43, 380201, 382190, 382282

Abstract:

A protocol for temporal synchronization of media signals with temporal components is used for digital watermarking and other applications. The synchronization protocol achieves initial synchronization by finding an initial synchronization key through analysis of a temporal media signal stream. It then uses features of the stream and a queue of one or more keys from previous frames to derive subsequent keys to maintain synchronization. If synchronization is lost due to channel errors or attacks, for example, the protocol uses the initial synchronization key to re-establish synchronization. In digital watermarking applications, the synchronization protocol is agnostic to the watermark embedding and reading functions.

US Patent:

8370635, Feb 5, 2013

Filed:

Nov 22, 2010

Appl. No.:

12/951843

Inventors:

Edward J. Delp - West Lafayette IN, US
Eugene T. Lin - West Lafayette IN, US

Assignee:

Purdue Research Foundation - West Lafayette IN

International Classification:

H04L 9/32

US Classification:

713176, 380 43, 380201, 382100, 382190, 382282

Abstract:

A method for synchronization of a digital watermark generates a digital watermark based on feature extraction and a key generator. The synchronization method is adapted for both temporal and spatial synchronization. Statistical features of the watermarked signal along with key generators are used to compute keys used to detect embedded digital watermarks that vary over time or space. For spatial synchronization, spatial redundancy is used to detect geometric distortion of a signal in which the watermark is embedded using an autocorrelation method to detect peaks caused by the redundancy of the watermark structure. These peaks are then analyzed with a histogram method to detect rotation and scaling of the host media signal. The spatial synchronization process is applied to watermarks for both intra-coded frames of video (I-frames) as well as still images.

US Patent:

8638978, Jan 28, 2014

Filed:

Jul 28, 2009

Appl. No.:

12/510983

Inventors:

Adnan M. Alattar - Tigard OR, US
Eugene T. Lin - West Lafayette IN, US
Mehmet U. Celik - Rochester NY, US

Assignee:

Digimarc Corporation - Beaverton OR

International Classification:

G06K 9/00

US Classification:

382100, 382235, 382253

Abstract:

Methods for embedding digital watermarks in compressed video include perceptual adapting a digital watermark in predicted and non-predicted data based on block activity derived from the compressed video stream, embedding in predicted objects in a video stream having separately compressed video objects, and bit rate control of watermarked video.