Multiformat television switcher

Details Multiformat television switcher Multiformat television switcher

1993-05-03

1994-06-28

Groody, James J.

Television

Image signal processing circuitry specific to television

Switching

348556, 348445, H04N 546, H04N 5268

Patent

active

053251318

ABSTRACT:
A mulltiformat television switcher adds an up-converter, a down-converter and an auxiliary selector to an existing master control switcher to provide the ability to provide both a standard format output video signal (NTSC, PAL, SECAM, etc.) and a HDTV format output video signal corresponding to a selected input video signal from a plurality of input video sources which include both standard and HDTV formats. The master control switcher provides a selected one of the standard format input video signals to a standard format input of the auxiliary selector and to the up-converter, and provides a control signal to the auxiliary selector. The HDTV format input video signals and the HDTV format video signal output from the up-converter are applied to HDTV inputs of the auxiliary selector. The auxiliary selector provides an HDTV format output video signal, selected from the HDTV inputs, and a corresponding standard format output video signal, selected from the standard format inputs, according to the video signal source selected by an operator at the master control switcher. A down-converter converts the HDTV format output video signal to a standard format video signal that is applied to other standard format inputs of the auxiliary selector. When the operator selects the video signal source, it is either up-converted or down-converted as necessary and output in both formats by the auxiliary selector.

REFERENCES:
patent: 4743958 (1988-05-01), Bannister et al.
patent: 4748496 (1988-05-01), Drary et al.
patent: 4800426 (1989-01-01), Glenn
patent: 5218436 (1993-06-01), Sugiyama et al.

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