Low cost progressive scan television with special features

Details Low cost progressive scan television with special features Low cost progressive scan television with special features

1996-04-19

2001-11-20

Lee, Michael H. (Department: 2614)

Television

Format conversion

Line doublers type

C348S452000

Reexamination Certificate

active

06320620

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to television systems, more particularly for progressively scanned, digital televisions.
2. Background of the Invention
Broadcast television signals typically arrive at the receiver in interlaced format. That is, each video frame to be displayed arrives as two fields. The first field contains either the even-numbered lines or the odd-numbered lines. The second field contains the opposite set of lines.
The television displays the frames such that the viewer cannot really tell that they are two fields. However, recent innovations in the broadcast television area have started to do progressive scanning. In progressive scanning (proscan), the interlaced fields are combined before display, and the entire frame is displayed. In a cathode-ray tube (CRT) television, this means that the electron gun or guns that scan the picture do so with the entire frame of data rather than scanning either the even or odd lines first, then following with the opposite lines.
In some embodiments of television systems, no CRT is used. These televisions use arrays of individually controllable elements, such as liquid crystal devices, or digital micromirror devices. etc. (LCDs or DMDs, respectively). Because there is no scanning gun in these systems, they will typically have to de-interlace the fields before display, then put the entire frame onto the activation circuitry for the array of individual elements.
This can cause problems by raising the system cost and requiring higher level circuitry to perform these functions. Without the ability to implement proscan, however, the other advantages of using spatial light modulators, including completely digital television (digital from input to output) and sharper pictures with better resolution, become overshadowed by the high cost.
A method is needed, therefore, to allow system using spatial light modulators to convert from interlaced to proscan without a sharp increase in the system cost.
SUMMARY OF THE INVENTION
A television system that receives interlaced signals is disclosed. The system receives the interlaced signals then converts them to progressively scanned data using one of several processing methods, depending upon the configuration of the system purchased. The configurations vary in cost, but can be easily upgraded to include the more expensive processing methods.
It is an advantage of the system in that if offers one system to a wide range of purchasers, making manufacture simpler yet can reach more consumers.
It is an advantage of the system in that it includes all of the necessary processing power to implement the more complex methods of interlaced to progressive scan conversion, thereby making upgrades easier to install.


REFERENCES:
patent: 4215397 (1980-07-01), Hom
patent: 5027201 (1991-06-01), Bernard
patent: 5051826 (1991-09-01), Ishii et al.
patent: 5192946 (1993-03-01), Thompson et al.
patent: 5260786 (1993-11-01), Kawashima et al.
patent: 5291280 (1994-03-01), Faroudja et al.
patent: 5386237 (1995-01-01), Knee
patent: 5398071 (1995-03-01), Gove et al.
patent: 0 415 325 A3 (1991-03-01), None
patent: 0 444 947 A3 (1991-09-01), None
Vishal Markandey, et al., “Motion Adaptive Deinterlacer for DMD (Digital Micromirror Device) Based Digital Television,”IEEE Transactions On Consumer Electronics, vol. 40, No. 3, Aug. 1994, pp. 735-741.
Gove, et al., “High Definition Display System Based On Degital Micromirror Device”, Oct. 26-28, 1994.
Markandey, et al., “Motion Adaptive Deinterlacer for DMD (Digital Micromirror Device) Based Degital Television”, Jun. 21-23, 1994.

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