Aspect ratio-improved television system compatible with conventi

Details Aspect ratio-improved television system compatible with conventi Aspect ratio-improved television system compatible with conventi

1989-10-02

1992-01-28

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358180, H04N 704

Patent

active

050847651

ABSTRACT:
In a wide-aspect television system, apparatus is provided for producing a source television signal for a wide aspect television screen, which source signal has the same horizontal and vertical synchronizing frequencies, but fewer effective scanning lines than a conventional television system. The wideaspect television system further includes apparatus for expanding the time base of the mentioned source television signal in the horizontal direction by a predetermined ratio. Further included is an apparatus for receiving a time base-expanded television signal produced by the expanding apparatus for arranging video information of both side areas of a time base-expanded television signal into top and bottom added scanning lines. A remaining area of the time base-expanded television signal substracted by both mentioned side areas have a horizontal scanning period substantially equal to a horizontal scanning period of the conventional television system. The total effective scanning lines of the source television signal and the top and bottom added scanning lines substantially corresponds to the total effective scanning lines of the conventional television system.

REFERENCES:
patent: 4551754 (1985-11-01), Meise et al.
patent: 4556906 (1985-12-01), Dischert et al.
patent: 4748496 (1988-05-01), Drury et al.
patent: 4864405 (1989-09-01), Chambers
"6-MHz Single-Channel HDTV Systems"; Schreiber at MIT; Ottawa HDTV Symposium; Oct. '87; pp. 1-7.

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