Star pattern partial encryption
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United States of America Patent
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-
Nov 27, 2007
Grant Date -
Jul 17, 2003
app pub date -
Oct 18, 2002
filing date -
Jan 2, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A selective encryption encoder consistent with certain embodiments of the invention has a packet identifier that identifies packets of a specified packet type, the specified packet type being defined by packets occurring in a star pattern approximately situated at an upper center of an image which contain intra-coded macroblocks. A packet duplicator duplicates the identified packets to produce first and second sets of the identified packets. The packets are sent to and from a primary encryption encoder to encrypt the first set of identified packets under a first encryption method. A secondary encrypter encrypts the second set of identified packets under a second encryption method.
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