Optimization methods for the insertion, projection, and detection of digital watermarks in digital data

• US 7,647,503 B2
• Filed: 09/07/2007
• Issued: 01/12/2010
• Est. Priority Date: 07/02/1996
• Status: Expired due to Fees

• Current Assignee: Wistaria Trading Inc.
• Original Assignee: Wistaria Trading Inc.
• Inventors: Moskowitz, Scott A.
• Primary Examiner(s): SMITHERS, MATTHEW
• Application Number:
  US11/899,661
• Publication Number:
  US 20070300073A1
• Time in Patent Office: 858 Days
• Field of Search: 713/176, 380/28
• US Class Current: 713/176
• CPC Class Codes: G06T 1/0028 Adaptive watermarking, e.g. Human Visual System [HVS]-based watermarking
• CPC Class Codes: G06T 2201/0064 for copy protection or copy management, e.g. CGMS, copy only once, one-time copy

Abstract

Disclosed herein are methods and systems for encoding digital watermarks into content signals. Also disclosed are systems and methods for detecting and/or verifying digital watermarks in content signals. According to one embodiment, a system for encoding of digital watermark information includes: a window identifier for identifying a sample window in the signal; an interval calculator for determining a quantization interval of the sample window; and a sampler for normalizing the sample window to provide normalized samples. Other methods and systems for encoding/decoding digital watermarks are also disclosed.

Claims

1. A system for digital watermark encode/decode operations, comprising:

a CODEC database comprising a plurality of CODECs; and

a processor which encodes at least one watermark using at least one CODEC from the CODEC database wherein the processor encodes a plurality of watermarks using at least two CODECs from the CODEC database, and wherein the processor stores each of the CODECs to the watermarking key wherein the processor generates a hash value for information regarding the CODEC used to encode the plurality of watermarks and attaches the hash value to the watermark.