| 摘要 |
<p>The method comprises the following steps: - reading (7) of an original PID and TSC bits in the PID and TSC fields of a packet header of an MPEG2 stream at least partially scrambled, - writing (7) of a temporary PID in a PID field in place of the original PID, function of the original PID value and TSC bits according to a correspondence table of an original PID and TSC bits with the temporary PIDs, - writing (7) of the value zero in the TSC field in place of the original value, - scrambling (4) of the stream with modified fields. Applications for the satellite transmission of partially scrambled MPEG2 digital signals.</p> |
