Composite video frame store

Details Composite video frame store Composite video frame store

1989-01-03

1990-04-24

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 13, 358160, H04N 964, H04N 591

Patent

active

049204076

ABSTRACT:
Apparatus stores a composite video frame including synchronization signals, color burst signals, and analog signals. The synchronization signals, color burst signals and analog signals of a video frame are sampled and digitized by circuitry: Two addressable memories are provided. An input register coupled to first and second memories buffers a plurality of digitized samples. An output register coupled to said first and second memories buffers the outputs of the memories. Address circuits provide sequential addressed to the memories for each cycle. During a write cycle, control means provide control signals for enabling the input register to buffer the samples and alternately write enabling the memories to store said samples. During a read cycle, control signals are provided for alternately read enabling the second memories to output the samples and to enable the output register to buffer the output. A circuit converts the output into analog.

REFERENCES:
patent: 4220965 (1980-09-01), Heitmann et al.
patent: 4485402 (1984-11-01), Searby
patent: 4602275 (1986-07-01), Smith et al.
patent: 4667222 (1987-05-01), McCoy
patent: 4746979 (1988-05-01), Kashigi

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