Apparatus for routing digital video image data

Details Apparatus for routing digital video image data Apparatus for routing digital video image data

1991-06-21

1993-06-22

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358160, 358183, 34082503, H04N 5262

Patent

active

052219690

ABSTRACT:
A plurality n of digital video data streams are individually latched into respective input latches 11.sub.1 to 11.sub.n by a first clock signal LPClk. Two out of n select signals are applied by a selector 16 to enable inputs 14 of the input latches 11.sub.1 to 11.sub.n to select alternate half clock cycles of latched video data and to output such video data to a common bus 19 which supplies two output latches 20 and 21 latched respectively by an antiphase clock signal FLPClk and the signal LPClk so that one of the selected streams is latched into latch 20 as foreground and the other into latch 21 as background. Further latches 31 and 32, and 33 and 34, may be employed to bring the foreground and background streams into relative synchronism.

REFERENCES:
patent: 4599721 (1986-07-01), Murray
patent: 4626912 (1986-12-01), Wilkinson
patent: 4716460 (1987-12-01), Benson et al.
patent: 4974083 (1990-11-01), Bloomfield et al.
patent: 5070449 (1991-12-01), Dawson et al.
Savant et al., Electronic Circuit Design, 1987, p. 740.
Mano, Digital Logic and Computer Design, 1979, pp. 175-177.

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