Method and system for limiting content diffusion to local receivers
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United States of America Patent
Stats
-
Jan 2, 2007
Grant Date -
Jul 21, 2005
app pub date -
Nov 1, 2004
filing date -
Oct 31, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Content is distributed from a source to a sink only if the sink is within a predetemined distance from a source. In one embodiment, a control signal is sent over a limited range channel to the sink and the content is then sent only if the control signal is received properly by the sink. In another embodiment, the content is encrypted and the encryption key is sent over the limited range channel. The content is also sent to the sink, but the sink cannot decode the content unless it has a proper copy of the decoding key. The control signal can be sent over a wireless channel, an IR channel, or an AC line. The content is sent over the Internet, either using a standard wired channel or over a wireless channel.
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