System for embedding data

Patent metadata

Field	Value
Publication number	US-9639910-B2
Application number	US-201514605123-A
Country	US
Kind code	B2
Filing date	Jan 26, 2015
Priority date	Nov 16, 2006
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A method and system including receiving marking information, determining, at least in part, based on the marking 0 information, a plurality of color element additives, adding the plurality of color element additives to at least one color element of a video frame, wherein the at least one color element includes a color element R, a color element G, and a color element B. Related methods and systems are also described.

First claim

What is claimed is:

1. A method implemented on a content rendering device, the method comprising:
at a marking information receiver, receiving a unique device identifier comprising information identifying the content rendering device, the information identifying the content rendering device comprising marking information;
at a determiner, determining a plurality of color element additives for a video frame, the determining comprising, at least in part, deriving harmonic functions based on the marking information, wherein the determining the plurality of color element additives comprises, at least in part:
determining:

R
⁡

(
t
)

=

A
*

sin
⁡

(

2
⁢

π
⁡

(

f
R

+
a

)

τ

⁢

(

t
+

ϕ
R

)

)

G
⁡

(
t
)

=

A
*

sin
⁡

(

2
⁢

π
⁡

(

f
G

+
a

)

τ

⁢

(

t
+

ϕ
G

)

)

B
⁡

(
t
)

=

A
*

sin
⁡

(

2
⁢

π
⁡

(

f
B

+
a

)

τ

⁢

(

t
+

ϕ
B

)

)

,

wherein:
variable A denotes a wave amplitude,
variable t denotes the video frame,
variable f R , variable f G , and variable f B are each one of a plurality of values determined based, at least in part, on the marking information,
variable τ denotes a base wavelength,
variable φ denotes a wave phase,
constant a denotes a base frequency; and
each of R(t), G(t), and B(t) denotes one of the plurality of color element additives;

at a color element adder, adding at least one of the plurality of color element additives to at least one color element of the video frame to apply a watermark to the video frame,
wherein the at least one color element comprises a color element R, a color element G, and a color element B.

2. The method according to claim 1 and wherein the marking information comprises one of:
a copyright mark; and
access rights data.

3. The method according to claim 2 and wherein the access rights data comprise playback/copying permission.

4. The method according to claim 1 and wherein the at least one color element comprises a Red-Green-Blue color element.

5. The method according to claim 1 and wherein the at least one color element comprises a chrominance/luminance color element.

6. The method according to claim 5 and wherein the chrominance/luminance color element comprises one of:
a YCbCr chrominance/luminance color element;
a YPbPr chrominance/luminance color element;
a YDbDr chrominance/luminance color element; and
a xvYCC chrominance/luminance color element.

7. The method according to claim 1 and wherein R(t), G(t), and B(t) are each rounded to an integer value.

8. The method according to claim 1 and wherein each of the values denoted by the variable f R , the variable f G , and the variable f B comprises a binary value.

9. The method according to claim 1 and wherein A comprises at least one of:
a value sufficiently low as to not substantially cause a change in color intensity;
a value sufficiently high as to be substantially distinct upon detection, such that A comprises a value noticeable above

Assignees

• Nds Ltd
• Cisco Tech Inc

Inventors

• Geyzel Zeev
• Dorrendorf Leonid

Classifications

• G06T1/0028 Primary

  Adaptive watermarking, e.g. Human Visual System [HVS]-based watermarking · CPC title

• G06T1/0085

  Time domain based watermarking, e.g. watermarks spread over several images · CPC title

• G06T1/0021 Primary

  Image watermarking · CPC title

• G06T7/408

  Physics · mapped topic

• G06T7/90

  Determination of colour characteristics · CPC title