Generating a scrambled data stream
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United States of America Patent
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Jun 25, 2013
Grant Date -
Dec 29, 2011
app pub date -
Dec 10, 2010
filing date -
Dec 11, 2009
priority date (Note) -
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Abstract
A method and a system for generating a scrambled data stream is described, wherein the method comprises: providing a code book comprising code information for scrambling data in data stream comprising one or more service streams; generating a control word request associated with at least one crypto period in at least one of said service streams; in response to said control word request, generating on the basis of said code information at least one control word associated with said crypto period in said service stream; and, scrambling data associated with at least one of said service streams using said control word.
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