METHODS FOR IMPROVED MODULATION OF VIDEO SIGNALS

• US 20060209209A1
• Filed: 05/15/2006
• Published: 09/21/2006
• Est. Priority Date: 10/20/2003
• Status: Active Grant

• Current Assignee: Advocado, Inc.
• Original Assignee: Koplar Interactive Systems International, LLC
• Inventors: Barsoum, Yousri H., Koplar, Edward J., Reynolds, Michael C.
• Granted Patent: US 7,586,542 B2
• Time in Patent Office: Days
• US Class Current: 348/473
• CPC Class Codes: H04N 7/025 Systems for the transmission of digital non-picture data, e.g. of text during the active part of a television frame transmission of digital non-picture data during the vertical blanking interval only H04N7/088
• CPC Class Codes: H04N 7/08 Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band , e.g. by time division H04N7/007 takes precedence

Abstract

A method for modulating a video signal. Frames of a plurality of frames are selected for modulation. A first magnitude alternation pattern is designated for each of a first area of a field of the selected frames. A second magnitude alternation pattern is designated for each of a second area of the field of the selected frames. The intensity of a plurality of pixels of a plurality of scan lines of the field of the selected frames is altered as designated by either the first magnitude alternation pattern or the second magnitude alternation pattern.

Claims

1. A method for modulating a video signal comprising:

selecting frames of a plurality of frames for modulation;

designating a first magnitude alternation pattern for each of one or more transition areas between subfields of a field of the selected frames;

designating a second magnitude alternation pattern for each of the subfields of the field of the selected frames, wherein the first magnitude alternation pattern is not the same pattern as the second magnitude alternation pattern; and

altering intensity of a plurality of pixels of a plurality of scan lines of the field of the selected frames as designated by either the first magnitude alternation pattern or the second magnitude alternation pattern.

2. The method of claim 1, wherein the first magnitude alternation pattern includes altering the intensity of the pixels by a first magnitude adjustment and the second magnitude alternation pattern includes altering the intensity of the pixels by a second magnitude adjustment, wherein the first magnitude adjustment is less than the second magnitude adjustment.

3. The method of claim 1, wherein the first magnitude alternation pattern includes a phased-in intensity alteration pattern.

4. The method of claim 1, wherein the first magnitude alternation pattern includes a phased-out intensity alteration pattern.

5. The method of claim 1, wherein the first magnitude alternation pattern includes a morphed pattern.

6. The method of claim 1, wherein the field includes an original field.

7. The method of claim 1, further comprising selecting a series of intensity multiplies.

8. The method of claim 7, wherein altering intensity of a plurality of pixels includes for each intensity multiplier, altering intensity of a plurality of pixels of a plurality of scan lines of the field of the selected frames as adjusted by the intensity multiplier and designated by either the first magnitude alternation pattern or the second magnitude alternation pattern.

9. An encoding system comprising:

a source; and

an encoder configured to;

obtain a video signal from a source, the video signal comprising a plurality of frames, each of the plurality of frames each comprising a plurality of scan lines, each of the plurality of scan lines comprising a plurality of pixels, each of the plurality of pixels comprising an intensity,

select frames of the plurality of frames for modulation,

designate a first magnitude alternation pattern for each of one or more transition areas between subfields of a field of the selected frames,

designate a second magnitude alternation pattern for each of the subfields of the field of the selected frames, wherein the first magnitude alternation pattern is not the same pattern as the second magnitude alternation pattern, and

alter the intensity of the plurality of pixels of the plurality of scan lines of the field of the selected frames as designated by either the first magnitude alternation pattern or the second magnitude alternation pattern.

10. A method for modulating a video signal comprising:

selecting frames of a plurality of frames for modulation;

determining locations of edges in a plurality of scan lines of a field for each selected frame;

designating a first magnitude adjustment for the locations of edges;

designating a second magnitude adjustment for a remainder portion of the field for each selected frame, wherein the first magnitude adjustment is not the same value as the second magnitude adjustment; and

altering the intensity of the plurality of pixels of the plurality of scan lines of the field of the selected frames as designated by either the first magnitude adjustment or the second magnitude adjustment.

11. The method of claim 10, wherein the first magnitude adjustment is greater than the second magnitude adjustment.

12. The method of claim 10, wherein the designating a first magnitude adjustment includes designating a higher magnitude adjustment for locations of edges having a sharp edge and designating a lower magnitude adjustment for locations of edges not having a sharp edge.

13. The method of claim 10, wherein the field includes an interlaced field.

14. The method of claim 10, further comprising selecting a series of intensity multiplies.

15. The method of claim 14, wherein altering intensity of a plurality of pixels includes for each intensity multiplier, altering the intensity of the plurality of pixels of the plurality of scan lines of the field of the selected frames as designated by either the first magnitude adjustment adjusted by the intensity multiplier or the second magnitude adjustment adjusted by the intensity multiplier.

16. An encoding system comprising:

a source; and

an encoder configured to;

obtain a video signal from a source, the video signal comprising a plurality of frames, each of the plurality of frames each comprising a plurality of scan lines, each of the plurality of scan lines comprising a plurality of pixels, each of the plurality of pixels comprising an intensity,

select frames of the plurality of frames for modulation;

determining locations of edges in the plurality of scan lines of a field for each selected frame,

designate a first magnitude adjustment for the locations of edges;

designate a second magnitude adjustment for a remainder portion of the field for each selected frame, wherein the first magnitude adjustment is not the same value as the second magnitude adjustment, and

alter the intensity of the plurality of pixels of the plurality of scan lines of the field of the selected frames as designated by either the first magnitude adjustment or the second magnitude adjustment.

17. A method for modulating a video signal comprising:

selecting a series of intensity multipliers;

selecting frames of a plurality of frames for modulation;

associating each intensity multiplier of the series of intensity multipliers with one or more frames from the selected frames; and

for each intensity multiplier, altering the intensity of the plurality of pixels of the plurality of scan lines of a field of the selected frames at a magnitude adjusted by the intensity multiplier.

18. The method of claim 17, wherein the series of intensity multipliers includes a first series of increasing intensity multipliers and a second series of decreasing intensity multipliers.

19. The method of claim 18, further comprising applying the first series of increasing intensity multipliers to even scan lines of the plurality of scan lines.

20. The method of claim 19, further comprising applying the second series of decreasing intensity multipliers to odd scan lines of the plurality of scan lines.

21. An encoding system comprising:

a source; and

an encoder configured to;

obtain a video signal from a source, the video signal comprising a plurality of frames, each of the plurality of frames each comprising a plurality of scan lines, each of the plurality of scan lines comprising a plurality of pixels, each of the plurality of pixels comprising an intensity,

select a series of intensity multipliers,

select frames of the plurality of frames for modulation;

associate each intensity multiplier of the series of intensity multipliers with one or more frames from the selected frames, and

for each intensity multiplier, altering the intensity of the plurality of pixels of the plurality of scan lines of a field of the selected frames at a magnitude adjusted by the intensity multiplier.