Video signal processing device for writing and reading a video s

Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

345204, 348500, 348513, H04L 700

Patent

active

058618791

ABSTRACT:
An input video signal is written into alternate field memories M1 and M2, according to a timing clock from an input video clock generator. A display video signal is alternately read from those field memories, according to a timing clock from a display video clock generator. In switching a read memory, an address observation circuit judges whether or not a read/write address passes by a write/read address, referring to the condition of reading and writing operations. In this event, the circuit makes a judgement, based on the lag between a vertical synchronizing signals of an input video signal and of a display video signal, and a change of the lag with time. If it is judged that one address will pass by the other, the same read/write memory is again accessed for reading/writing. With this arrangement, there is provided a circuit having a relatively simple structure for preventing a match of read and write addresses.

REFERENCES:
patent: 4018990 (1977-04-01), Long et al.
patent: 5291275 (1994-03-01), Lumelsky
patent: 5335337 (1994-08-01), Gagliarado et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Video signal processing device for writing and reading a video s does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Video signal processing device for writing and reading a video s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video signal processing device for writing and reading a video s will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1250444

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.