CCD video memory systems

EE 38 June 1986 CCD VIDEO MEMORY SYSTEMS It seems fairly certain that over the next few years more and more video systems will incorporate picture frame memories. With these, the picture quality of monitors and television receivers can be improved, while at the same time the way is opened for a host of new features. Video memories are used in satellite receivers; in medical scanners; in material testing by infra- red, supersonic, and X-ray techniques; in astronomy and photography; and, last but not least, security equipment. Such memories are, in the main, dynamic RAMs. CCD (charge-coupled device) memories are inherently slower than RAMs, but also cheaper and more compact. This makes them suitable for applications that are either serial in nature or that do not require the fast operating speeds of RAMs. Now that digital signal processing is used in modern TV receivers, video memories can be incorporated to offer a number of new oper- ational aspects. • Improved picture qual- ity...