Binary encoding method for data read from optical record and device therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 4, 1989
Grant Date -
N/A
app pub date -
Apr 21, 1986
filing date -
Apr 22, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to a binary encoding method for reading the data from an optical record comprising steps of photo-electrically reading the optically recorded data which are encoded into binary codes with an FM encoding method and of comparing thus obtained video signals with a threshold to encode the same into binary codes and the device therefor. This invention is featured by the structure that the mark rate of binary encoded signals are detected to obtain the deviation thereof from a preset mark rate and the reading sensitivity of a reading means is adjusted based on said deviation in a manner to make the mark rate of the binary encoded signals identical to the preset mark rate. This invention is further characterized by the structure that video signals are binary encoded by plural groups of binary encoding means on the basis of different thresholds and the binary encoded signals of the group having the optimal mark rate are selected.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully