Method and apparatus for automatic calibration of analog video c

Details Method and apparatus for automatic calibration of analog video c Method and apparatus for automatic calibration of analog video c

1996-09-30

2000-09-26

Lee, Michael H.

Television

Image signal processing circuitry specific to television

Special effects

348587, 348180, H04N 974, H04N 575

Patent

active

061248975

ABSTRACT:
An improved technique for mixing picture signals directed at a monitor screen. Two analog video signals (such as an analog VGA input and an analog RGB signal produced in response to a stored digital still or moving image) may be multiplexed in analog form. An analog chromakey mixer detects a background color in the first video signal (such as the analog VGA input), and replaces the portion of that first video signal with the second video signal. The time delays of the first video signal and the second video signal may be adjusted so that they reach the monitor screen (by means of an a multiplexer output) at the same time. An alignment detector may attempt to align two known signals (such as a VGA sync signal and a signal generated for this purpose), and may adjust a set of time delays in the analog chromakey mixer until the time difference between the first and second video signals falls below a threshold.

REFERENCES:
patent: 3908080 (1975-09-01), Broadbent
patent: 3986204 (1976-10-01), Smith
patent: 4122490 (1978-10-01), Lish
patent: 4394650 (1983-07-01), Long et al.
patent: 4425581 (1984-01-01), Schweppe et al.
patent: 4498098 (1985-02-01), Stell
patent: 4523227 (1985-06-01), Hurst
patent: 4528561 (1985-07-01), Kitamura
patent: 4580165 (1986-04-01), Patton et al.
patent: 4587633 (1986-05-01), Wang et al.
patent: 4626837 (1986-12-01), Priestly
patent: 4675612 (1987-06-01), Adams et al.
patent: 4680622 (1987-07-01), Barnes et al.
patent: 4684936 (1987-08-01), Brown et al.
patent: 4713621 (1987-12-01), Nakamura et al.
patent: 4757310 (1988-07-01), Katsura et al.
patent: 4811084 (1989-03-01), Belmares-Sarabia et al.
patent: 4811205 (1989-03-01), Normington et al.
patent: 4814879 (1991-03-01), McNeeley
patent: 4823260 (1989-04-01), Imel et al.
patent: 4827344 (1989-05-01), Astle et al.
patent: 4829366 (1989-05-01), Penney
patent: 4876600 (1989-10-01), Pietzsch et al.
patent: 4876660 (1989-10-01), Owen et al.
patent: 4891631 (1990-01-01), Fredlund et al.
patent: 4905189 (1990-02-01), Brunolli
patent: 4907086 (1990-03-01), Truong
patent: 4947257 (1990-08-01), Fernandez et al.
patent: 4947342 (1990-08-01), Katsura et al.
patent: 4951229 (1990-08-01), DiNicola et al.
patent: 4994912 (1991-02-01), Lumelsky et al.
patent: 5027212 (1991-06-01), Marlton et al.
patent: 5046023 (1991-09-01), Katsura et al.
patent: 5065346 (1991-11-01), Kawai et al.
patent: 5097257 (1992-03-01), Clough et al.
patent: 5099331 (1992-03-01), Truong
patent: 5111292 (1992-05-01), Kuriacose et al.
patent: 5111409 (1992-05-01), Gasper et al.
patent: 5138307 (1992-08-01), Tatsumi
patent: 5142380 (1992-08-01), Sakagami et al.
patent: 5151875 (1992-09-01), Sato
patent: 5157716 (1992-10-01), Naddor et al.
patent: 5168356 (1992-12-01), Acampora et al.
patent: 5185665 (1993-02-01), Okura et al.
patent: 5208745 (1993-05-01), Quentin et al.
patent: 5218431 (1993-06-01), Gleicher et al.
patent: 5220312 (1993-06-01), Lumelsky et al.
patent: 5243447 (1993-09-01), Bodenkamp et al.
patent: 5289276 (1994-02-01), Siracusa et al.
patent: 5398075 (1995-03-01), Freytag et al.
patent: 5402147 (1995-03-01), Chen et al.
patent: 5406306 (1995-04-01), Siann et al.
patent: 5528309 (1996-06-01), Nguyen
patent: 5719511 (1998-02-01), Le Cornec et al.
patent: 5832120 (1998-11-01), Prabhakar et al.
Brunhoff, T. "VEX Provides Mechanism for Integrating Graphics and Video"; Computer Technology Review, Nov. 10, 1990, No. 1, pp. 107-111.
Tsai Y T: "Color Image Compression for Single-Chip Cameras" IEEE Transactions on Electron Devices, vol. 38, No. 5, May 1, 1991, pp. 1226-1232, XP000200683, see abstract; figures 1,6.

Affiliated with

Also associated with

Rating

Method and apparatus for automatic calibration of analog video c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for automatic calibration of analog video c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for automatic calibration of analog video c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2104366