Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2005-04-20
2009-11-17
Zand, Kambiz (Department: 2434)
Cryptography
Video cryptography
Video electric signal modification
C726S022000
Reexamination Certificate
active
07620181
ABSTRACT:
A synchronized communications system permits resynchronization in late-entry or fade-recovery conditions. A plurality of communications devices are operative for communicating in a synchronized, encrypted communications channel between each other. At least one of the communications devices is operative for continuously transmitting a resynchronization header that includes a start-of-message field that includes voice or data message information type, a message indicator field, a synchronization check field, a first error correction field computed over the start-of-message/message indicator/synchronization fields, a frame index field and a second error correction field computed on the frame index field. Receivers monitor the channel to decode these headers to perform late-entry or fade recovery.
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Bicksler David M.
Rogers William S.
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Harriman Dant B Shaifer
Harris Corporation
Zand Kambiz
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