Digital video frame recorder with video display test pattern sig

Details Digital video frame recorder with video display test pattern sig Digital video frame recorder with video display test pattern sig

1990-04-10

1991-10-08

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 10, H04N 1700

Patent

active

050559281

ABSTRACT:
A digital video frame recorder which includes an internal video display test pattern signal generator constructed substantially from already existing circuitry and hardware. A microprocessor and read only memor ("ROM") and/or random access memory ("RAM") used for performing preprogrammed self-diagnostic testing upon the digital video frame recorder are additionally programmed so that the user can selectively enable the internal video display test pattern signal generator. The internally generated video display test pattern signal data is stored within the frame memory in memory locations not normally used for storage of externally sourced video data. The internally generated video display test pattern signal data can be generated by sequentially reading out preprogrammed video display test pattern signal data directly from the ROM or RAM, or by having the microprocessor execute preprogrammed instructions stored in the ROM or RAM and thereby compute the video display test pattern signal data directly.

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patent: 4554663 (1985-11-01), Pham van Cang
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patent: 4893925 (1990-01-01), Sweeney et al.
patent: 4956707 (1990-09-01), Oakley et al.

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