Method and system for enhanced modulation of video signals
View Patent ↗A method, apparatus and system for signal modulation. A plurality of pixels are selected in a pattern such that a first pixel group of the plurality of pixels is unpaired with a second pixel group of the plurality of pixels throughout the pattern in a portion of a video signal. The intensity of the plurality of the pixels is altered at a constant magnitude in the portion of the video signal pursuant to the pattern in a substantially invisible way.
1. A method for signal modulation comprising:
selecting a plurality of pixels within one or more frames of a video signal in a pattern such that a first pixel group of the plurality of pixels is unpaired with a second pixel group of the plurality of pixels throughout the pattern; and
determining adjustment amounts to the first pixel group and the second pixel group according to at least one signal hiding technique; and
altering intensity of the first pixel group and the second pixel group according to the adjustment amounts.
2. The method of claim 1 , wherein determining adjustment amounts to the first pixel group according to at least one signal hiding technique includes:
determining adjustment amounts to a plurality of pixels for a first pixel group by selecting a largest adjustment value for each of the plurality of pixels determined by at least two signal hiding techniques.
3. The method of claim 1 , wherein altering intensity of the plurality of the pixels of the first pixel group and the second pixel group according to the adjustment amounts includes:
altering intensity of the plurality of the pixels of the first pixel group and the second pixel group according to a random or pseudo-random portion of the adjustment amounts.
4. A method for signal modulation comprising:
selecting a plurality of pixels in a pattern such that a first pixel group of the plurality of pixels is unpaired with a second pixel group of the plurality of pixels throughout the pattern in a portion of a video signal; and
altering intensity of the plurality of the pixels at a constant magnitude in the portion of the video signal pursuant to the pattern in a substantially invisible way.
5. The method of claim 4 , further comprising selecting a varied pattern of high and low changes as a pattern.
6. The method of claim 4 , wherein altering luminance of a plurality of the pixels includes at least one of selectively adding or removing luminance to the plurality of pixels.
7. The method of claim 4 , further comprising selecting a pattern wherein the first group of the plurality of pixels are not in a high/low configuration with the second group of the plurality of pixels.
8. The method of claim 4 , further comprising receiving a video signal from a signal source.
9. The method of claim 4 , wherein the video signal includes an analog video signal.
10. The method of claim 4 , wherein the portions include one or more frames of the video signal.
11. The method of claim 10 , wherein the one or more frames of the video signal includes one or more consecutive frames of the video signal.
12. The method of claim 4 , wherein the portions include a field of one or more frames of the video signal.
13. The method of claim 11 , wherein the field of the one or more frames includes a same field of the one or more frames.
14. The method of claim 4 , further comprising providing the video signal including a carrier signal to a broadcast source.
15. The method of claim 4 , further comprising providing a resulting modulated video signal to a broadcast source.
16. The method of claim 4 , further comprising selecting an irregular configuration as a pattern.
17. The method of claim 4 , wherein the pattern creates an amount of high/low and low/high changes in the field that makes an intensity alteration to the plurality of pixels detectible.
18. The method of claim 4 , wherein the pattern creates an amount of line to line differences with a plurality of pairs of adjacent scan lines in the field that makes an intensity alteration to the plurality of pixels detectible.
19. The method of claim 4 , further comprising selecting a pseudorandom pattern as a pattern.
20. The method of claim 1 , wherein the first pixel group includes selection of a first number of scan lines of a field and the second pixel group includes a second number of scan lines of the field that is different than the first number of scan lines.
21. An encoding system comprising:
a signal source; and
an encoder configured to:
receive a video signal from the signal source,
designate a pixel group in a field of one or more frames of the video signal in a pattern such that the plurality of scan lines are not paired throughout the field, and
alter intensity of a plurality of the pixels of the designated pixel group at a constant magnitude pursuant to the pattern in a substantially invisible way.
22. The system of claim 21 , wherein the pixel group includes a plurality of scan lines.
23. An encoding apparatus comprising:
a processor; and
software means on the processor operative for:
selecting a plurality of scan lines in a field of one or more frames in a pattern such that the plurality of scan lines are not paired throughout the field, and
altering luminance of a plurality of the pixels of the plurality of scan lines at a constant magnitude pursuant to the pattern in a substantially invisible way.
24. An encoding apparatus comprising:
means for selecting a plurality of scan lines in a field of one or more frames in a pattern such that the plurality of scan lines are not paired throughout the field; and
means for altering luminance of a plurality of the pixels of the plurality of scan lines at a constant magnitude pursuant to the pattern in a substantially invisible way.
25. A tangible medium comprising:
a plurality of frames; and
a plurality of scan lines of a field of at least one of the plurality of frames comprising a plurality of pixels with substantially invisible luminance adjustments according to a pattern where the plurality of scan lines are not paired throughout the field, wherein luminance of the plurality of the pixels of the plurality of scan lines is adjusted at a constant magnitude.
26. An encoding system comprising:
an encoder; and
a broadcast source, the broadcast source receiving a modulated video signal from the encoder, the video signal comprising:
a plurality of frames, and
a plurality of scan lines of a field of at least one of the plurality of frames comprising a plurality of pixels with substantially invisible luminance adjustments according to a pattern where the plurality of scan lines are not paired throughout the field, wherein luminance of the plurality of the pixels of the plurality of scan lines is adjusted at a constant magnitude.