| 摘要 |
An apparatus in a digital network receives at least one input transport stream (202a, 202b, 210) having a plurality of PID streams and outputs at least one transport streams. The apparatus demultiplexes (222) the at least one input transport streams and determines whether to: decrypt packets included in the at least one input transport stream; statistically multiplex (222) a group of PID streams included in the at least one input transport stream; and encrypt packets (220) included in the at least one input transport stream.
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