In a subscriber network receiving digital packets and transmitting digital packets below a predetermined maximum bit rate
AssigneeScientific-Atlanta, Inc.
InventorHoward G. Pinder
Life of this patent
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Abstract
An apparatus in a digital network receives at least one input transport stream having a plurality of PID streams and outputs at least one transport streams. The apparatus demultiplexes the at least one input transport streams and determines whether to: decrypt packets included in the at least one input transport stream; statistically multiplex a group of PID streams included in the at least one input transport stream; and encrypt packets included in the at least one input transport stream.
Claims36
A apparatus for making a transport stream with a predetermined maximum bit rate, the apparatus comprising:
- a port adapted to receive an input transport stream having a plurality of PID streams included therein, wherein each PID stream comprise a plurality of packets having a common PID value;
- a storage device in communication with the port, the storage device adapted to store packets and a plurality of keys;
- means for determining whether to decrypt a first at least one PID stream of the plurality of received PID streams;
- means for decrypting the first at least one PID stream;
- means for determining whether to statistically multiplex a second at least one PID stream of the plurality of received PID streams;
- means for statistically multiplexing the second at least one PID stream, wherein the bit rate of the second at least one PID stream does not exceed the predetermined maximum bit rate;
- means for determining whether to encrypt a third at least one PID stream of the plurality of received PID streams;
- means for encrypting the third at least one PID stream;
- and
- means for transmitting a fourth at least one PID stream of the plurality of received PID streams downstream.
An apparatus in a digital network that receives at least one digital transport stream and provides at least one digital transport stream, which has a predetermined maximum bit rate level, to at least one downstream receiver, the apparatus comprising:
- a port adapted to receive an input transport stream that includes a plurality of PID streams, each PID stream includes a plurality of packets having a common PID value associated therewith;
- a storage device in communication with the port, the storage device adapted to store the received packets and a plurality of keys;
- and
- a processor in communication with the storage device and the port, the processor adapted to determine whether to decrypt a first at least one PID stream of the plurality of received PID streams, the processor adapted to determine whether to statistically multiplex a second at least one PID stream of the plurality of received PID streams, the processor adapted to determine whether to encrypt a third at least one PID stream of the plurality of received PID streams.
Dependencies are inferred from the claim text.