Television memory system

Details Television memory system Television memory system

1984-03-19

1986-07-22

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 21R, H04N 1120, H04N 964

Patent

active

046022759

ABSTRACT:
A memory system for a television receiver is disclosed. The memory system contains an array of addressable memory cells, each row of which can contain one line of sampled video signals. The number of rows in the array is greater than the number of lines in a frame. Apparatus is included in the memory system for simultaneously writing more than one line of samples into the memory, for simultaneously reading more than one line of samples from the memory, or for both. Simultaneous access to multiple lines allows the reading and writing of multiple corresponding lines of samples from both the current and the prior frame. The row addresses that are used to store the lines of samples for a frame are not the same for each frame, rather the lines of each new frame are stored in rows with lesser addresses than the rows used for the prior frame. This introduces a backward scrolling of the stored image from frame to frame which avoids overwriting data to be used in time-domain or spatial-domain filtering done directly from memory.

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P. M. Kogge, Architecture of Pipelined Computers, McGraw-Hill Book Company, pp. 39-44.

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