Transport stream encryption device and its editing device and method for use therein
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United States of America Patent
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Aug 14, 2012
Grant Date -
Mar 31, 2005
app pub date -
Sep 30, 2004
filing date -
Sep 30, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
An encryption device, comprising: detection portion for detecting a TS header, a PES header, a sequence header, a GOP header, and a sequence end code for a transport stream not encrypted; and encryption portion for encrypting the transport stream except the TS header, the PES header, the sequence header, the GOP header, and the sequence end code. An editing device, comprising: detection portion for detecting a TS header, a PES header, a sequence header, a GOP header, and a sequence end code in a transport stream; and editing portion for editing the encrypted transport stream without decryption in units of TS packets ranging from a TS packet where the GOP header is detected to a TS packet previous to a TS packet where a subsequent GOP header is detected out of TS packets having an identical PID.
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