Teletext decoder using a common memory

Details Teletext decoder using a common memory Teletext decoder using a common memory

H - Electricity

04

N

350/34

H04N 7/08 (2006.01) G09G 5/39 (2006.01)

Patent

CA 1219334

ABSTRACT TELETEXT DECODER USING A COMMON MEMORY A teletext decoder extracts digital information from a video signal for displaying graphics and textual information embedded in the video signal. The decoder includes a prefix processor (24) responding to commands supplied by a keyboard (26) operated by a user for selecting and storing the pertinent embedded information. The decoder includes a common memory (28) for storing the digital words provided by the prefix processor, and a microcomputer (25) capable of reading from and writing to the common memory. The microcomputer (25) reads the data provided by the prefix processor, converts it to digital words representing the picture elements and stores the converted digital words in the common memory (28). The decoder includes a display processor (43) which reads the converted digital words from the common memory to drive an image display device. The times of access by the microcomputer (25), prefix processor (24) and display processor (43) to the common memory (28) are controlled by a timing unit (29) and a switch (32) which give the display processor (43) highest priority of access, and give the prefix processor (24) priority over the microcomputer (25).

468168

Affiliated with

Also associated with

Rating

Teletext decoder using a common memory does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Teletext decoder using a common memory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Teletext decoder using a common memory will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1275240