Title:
CONDITIONAL ACCESS SYSTEM AND APPARATUS
Document Type and Number:
WIPO Patent Application WO2003090463
Kind Code:
A3
Abstract:
A signal (24) that contains a stream of encrypted data and a plurality of individually identified streams (20, 22) of messages. Each of the streams (20, 22) of messages contains decryption information for decrypting a common part of the encrypted data. In a receiving and recording apparatus a mode selection unit (16) selects an operating mode from a plurality of modes including a live rendering mode and a replay mode for rendering the signal with a rendering unit (14) when received live and when replayed from storage respectively. A decoder (14) decrypts the encrypted data using a selectable one of the streams of messages. The decoder (14) selects the stream of messages dependent on the selected operating mode.
Inventors:
VAN RIJNSOEVER BARTHOLLOMEUS J (NL)
KAMPERMAN FRANCISCUS L A J (NL)
RIJCKAERT ALBERT M A (NL)
KAMPERMAN FRANCISCUS L A J (NL)
RIJCKAERT ALBERT M A (NL)
Application Number:
PCT/IB2003/001404
Publication Date:
June 17, 2004
Filing Date:
April 03, 2003
Export Citation:
Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
VAN RIJNSOEVER BARTHOLLOMEUS J (NL)
KAMPERMAN FRANCISCUS L A J (NL)
RIJCKAERT ALBERT M A (NL)
VAN RIJNSOEVER BARTHOLLOMEUS J (NL)
KAMPERMAN FRANCISCUS L A J (NL)
RIJCKAERT ALBERT M A (NL)
International Classes:
H04L9/18; H04N5/913; H04N7/16; H04N7/167; (IPC1-7): H04N7/16; H04N5/913; H04N7/167
Domestic Patent References:
| WO2001026372A1 | 2001-04-12 | |||
| WO2002030118A1 | 2002-04-11 |
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