Digital receiver demultiplexer

Details Digital receiver demultiplexer Digital receiver demultiplexer

1999-01-29

2010-06-01

Hirl, Joseph (Department: 2426)

Interactive video distribution systems

Video distribution system with local interaction

Receiver

C725S131000, C725S151000, C725S068000, C725S100000

Reexamination Certificate

active

07730515

ABSTRACT:
The present invention relates to the demultiplexing of a digital data stream in a receiver so as to retain only those parts of the digital data stream required by the receiver. Such demultiplexing is particularly useful when applied to a receiver circuit in a television system having a digital set-top-box.A memory in the receiver stores packet identifiers of data packets required by the receiver, which are stored in the memory under the control of a first control circuit. A second control circuit extracts packet identifiers from incoming data packets in an input digital data stream. A third control circuit receives the extracted packet identifier and determines whether this matches one of the packet identifiers stored in the memory. A match signal is set by the third control circuit to the second control circuit responsive to a match. The second control circuit demultiplexes the input data packet responsive to the match signal.

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