Preventing copying of digital information
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 13, 2004
Grant Date -
N/A
app pub date -
Dec 21, 1998
filing date -
Dec 26, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a network for broadcast communication of digital information composed of image, audio etc., prior to the broadcasting of the digital information of which copying is limited, there is discriminated whether a recording device is present on the network and the output of the digital information is controlled according to the result of discrimination. If the recording device is present, the digital interface or the recording function of the recording device is so controlled that the broadcast digital information cannot be recorded. Thus, in case the digital information of which copying is limited is broadcast on the network, there can be prevented the unlawful copying or erroneous recording of such digital information.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
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