Encoding in two chrominance directions

• US 8,660,298 B2
• Filed: 06/12/2012
• Issued: 02/25/2014
• Est. Priority Date: 12/17/2008
• Status: Active Grant

• Current Assignee: Digimarc Corporation
• Original Assignee: Digimarc Corporation
• Inventors: Reed, Alastair M.
• Primary Examiner(s): GORADIA, SHEFALI DINESH
• Application Number:
  US13/494,849
• Publication Number:
  US 20130148714A1
• Time in Patent Office: 623 Days
• Field of Search: 382/100, 382162-167
• US Class Current: 382/100
• CPC Class Codes: G06T 1/0021 Image watermarking
• CPC Class Codes: G06T 1/005 Robust watermarking, e.g. average attack or collusion attack resistant
• CPC Class Codes: G06T 2201/0052 Embedding of the watermark in the frequency domain
• CPC Class Codes: G06T 2201/0065 Extraction of an embedded watermark; Reliable detection
• CPC Class Codes: G06T 2207/10024 Color image
• CPC Class Codes: G06T 2207/20224 Image subtraction
• CPC Class Codes: G06T 7/90 Determination of colour characteristics
• CPC Class Codes: H04B 1/3833 Hand-held transceivers
• CPC Class Codes: H04N 9/68 for controlling the amplitude of colour signals, e.g. automatic chroma control circuits H04N9/71, H04N9/73 take precedence; camera processing pipelines for controlling the colour saturation of colour signals H04N23/86

Abstract

The present disclosure relates generally signal processing. One claim recites an apparatus comprising: memory for storing a color video signal comprising first data and second data; and a processor. The processor is programmed for: modifying first color information and second color information of the first data by encoding a signal in the first color information such that the signal includes a first signal polarity, and encoding the signal in the second color information such that signal includes a second signal polarity that is inversely related to the first signal polarity, and modifying first color information and second color information of the second data by encoding the signal in the first color information such that signal includes the second signal polarity, and encoding the signal in the second color information such that the signal includes the first signal polarity. Of course, different combinations and claims are provided too.

Claims

1. An apparatus comprising:

memory for storing a color video signal comprising first data and second data;

a processor programmed for;

modifying first color information and second color information of the first data by encoding a signal in the first color information such that the signal includes a first signal polarity, and encoding the signal in the second color information such that signal includes a second signal polarity that is inversely related to the first signal polarity,

modifying first color information and second color information of the second data by encoding the signal in the first color information such that signal includes the second signal polarity, and encoding the signal in the second color information such that the signal includes the first signal polarity.

2. The apparatus of claim 1 in which encoding the signal utilizes digital watermark embedding.

3. The apparatus of claim 1 in which the signal—

once encoded in the first data and in the second data—

is imperceptible to a human observer as the video is rendered in real time.

4. The apparatus of claim 1 in which the first data comprises a first frame and the second data comprise a second frame.

5. The apparatus of claim 4 in which the first frame and the second frame are not adjacent frames.