Video memory device capable of simultaneously reading a pluralit

Details Video memory device capable of simultaneously reading a pluralit Video memory device capable of simultaneously reading a pluralit

1987-10-02

1988-05-24

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, 358160, H04N 514, H04N 714

Patent

active

047469790

ABSTRACT:
On achieving a special effect on a television screen, a succession of picture elements is supplied to a video memory device comprising a plurality of memory units which are periodically and successively loaded with the picture elements by a write-in controller during a write-in operation and which are simultaneously accessed by a read-out controller to concurrently read a plurality of the picture elements out of the memory units, respectively. The write-in controller indicates a memory address numbered in common to the memory units until consecutive ones of the picture elements are delivered to all of the memory units and, thereafter, changes the address to another one. The read-out controller simultaneously delivers either a set of common-numbered memory addresses to the respective memory units or a set of the common-numbered memory addresses and adjacent memory addresses to the common-numbered addresses.

REFERENCES:
patent: 3366739 (1968-01-01), Parkinson
patent: 4148070 (1979-04-01), Taylor
patent: 4292652 (1981-09-01), Yumde
patent: 4455572 (1984-06-01), Malden
patent: 4485402 (1984-11-01), Searby
patent: 4567506 (1986-01-01), Shinoda

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