The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 1988
Filed:
Feb. 10, 1987
John W Richards, Chilbolton, Near Stockbridge, GB;
Derek P Allsop, Woking, GB;
Sony Corporation, Tokyo, JP;
Abstract
A random access memory apparatus suitable for sequential write/non-sequential read, for example in a digital video special effects unit, comprises a write enable demultiplexer and a write address generator for demultiplexing incoming data into N channels A to D, where N is at least two, N memories in each of the N channels A to D, the incoming data allocated to any given one of the channels A to D being written into all of the memories in the given channel A to D, a read address generator for reading stored data from any one of the memories and, on reading from a memory, setting a busy flag for that memory, the busy flag being cleared N data periods later, and a busy flag control to control the read address generator to step onto a different memory in the same channel A to D as a memory to be read, when the memory to be read has a set busy flag. Apparatus is also provided for non-sequential write/sequential read and non-sequential write/non-sequential read.