Frame period timing generator for raster scan

Details Frame period timing generator for raster scan Frame period timing generator for raster scan

1980-04-11

1981-07-21

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 19, 358149, 364900, 307265, 307269, 328 58, 328 63, H04N 506, H04N 946, G06F 104, H03K 504, H03K 513

Patent

active

042801389

ABSTRACT:
A high frequency, high resolution programmable timing signal generator provides periodic timing signals during a time period which is long with respect to the time resolution of the generator. The timing signal generator which is particularly applicable for generation of the composite sync signal (and numerous related signals) for a video television signal, includes a small, high speed random access memory wherein each word corresponds to a timing state and each output bit provides a sync video related signal. Other memory bit outputs operate in conjunction with control and timing circuitry to sequentially address the memory while permitting the memory to remain in a given state for predetermined time durations and to cyclically repeat selected state sequences. Memory word compaction is thus facilitated to permit the use of small, fast memories to provide precision implementation of complex timing functions over relatively long frame period intervals with wide flexibility.

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