David A Zaun

US Patent:

20010024456, Sep 27, 2001

Filed:

Dec 14, 2000

Appl. No.:

09/736947

Inventors:

David Zaun - Cherry Hill NJ, US
Jeffrey Viola - Glen Mills PA, US
Stephen Iaquinto - Doylestown PA, US

International Classification:

H04J003/04

US Classification:

370/535000, 370/412000

Abstract:

A re-multiplexer module for use in a packet processing system used in cable television headend devices generates two or more output streams from two or more MPEG input transport streams. The re-multiplexer module includes an input processing portion that receives a plurality of input data streams containing packet data, a plurality of packet buffers to store the packet data, an output processor that selectively multiplexes the data packets in the packet buffers, and a host processor that controls the operation of the input processing portion and the output processing portion.

US Patent:

20020024610, Feb 28, 2002

Filed:

Dec 14, 2000

Appl. No.:

09/737301

Inventors:

David Zaun - Cherry Hill NJ, US
Jeffrey Viola - Glen Mills PA, US
Stephen Iaquinto - Doylestown PA, US

International Classification:

H04L012/56

US Classification:

348/366000, 370/392000, 370/475000

Abstract:

An input filter for use in a re-multiplexing module to process input packet data, includes an input interface that receives the input packet data, an input processor that is designed to write data to a packet buffer, and a packet identifier table containing PID values for filtering the input packet data. The input filter is implemented as hardware, thereby eliminating the limitations encounted in software filtering of data packets.

US Patent:

20020024967, Feb 28, 2002

Filed:

Dec 14, 2000

Appl. No.:

09/737328

Inventors:

David Zaun - Cherry Hill NJ, US
Jeffrey Viola - Glen Mills PA, US
Stephen Iaquinto - Doylestown PA, US

International Classification:

H04L012/56

US Classification:

370/429000, 370/389000

Abstract:

A packet identifier table for use in conjunction with an input processor in a re-multiplexing module is divided into an active table and a pending table. Both tables conduct PID filter values used to filter incoming packet data. The active table contains PID values that are used by the re-multiplexer module, while the pending table contains PID values that can be modified while the active table is in use. A host processor switches the status of the active table and the pending table so that the modified values can be used by the input processor. Because the PID values in the active table are kept separate from the PID values that are being modified, PID value modification can occur without interrupting the re-multiplexing operation.