Anti-copy system utilizing audible and inaudible protection signals
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 28, 1995
Issued Date -
N/A
app pub date -
Apr 13, 1993
filing date -
Jan 22, 1988
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A system for preventing the unauthorized copying of audio or video recording by (1) processing the recorded material so as to identify the protected material in a manner that does not audibly distort the program material, and (2) processing the recorded material by a second method that produces audible artifacts. Equipment capable of removing the audible artifacts while retaining the inaudible identification signal would be installed in audio digital tape recorders or video recorders so as to allow the equipment to be used for playback purposes while at the same time discouraging the unauthorized copying of audio, video or motion picture protected material.
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