Method and apparatus for modifying a transport packet stream to

Details Method and apparatus for modifying a transport packet stream to Method and apparatus for modifying a transport packet stream to

1995-11-17

1998-06-23

Olms, Douglas W.

Multiplex communications

Communication techniques for information carried in plural...

Assembly or disassembly of messages having address headers

370391, 348467, 348423, H04J 324

Patent

active

057712395

ABSTRACT:
An MPEG transport packet stream or the like is modified to provide concatenated synchronization bytes at an output of an interleaver receiving the modified packet stream. A conventional sync byte located in a first transport packet is replaced with a first substitute sync byte. A conventional sync byte located in a conventional sync byte position of a second transport packet is deleted. Another byte from the second transport packet is moved to the position of the deleted sync byte to open a desired byte position in the second transport packet. A second substitute sync byte is inserted into the desired byte position. The first and second transport packets and the desired byte position are selected to provide the first and second substitute sync bytes at locations in the modified packet stream where the first substitute sync byte will be concatenated with the second substitute sync byte at the output of the interleaver. The transport packet stream can be further modified to provide concatenated auxiliary bytes at the output of the interleaver.

REFERENCES:
patent: 5517250 (1996-05-01), Hoogenboom et al.
patent: 5583562 (1996-12-01), Birch et al.
patent: 5598415 (1997-01-01), Nuber et al.
"Baseline Specification for the European System for Broadcasting Digital Television, Sound, and Data Services by Satellite in the 11/12 GHz Bands, and the CATV Cable and SMATV Distribution of Corresponding Digital Services," Digital Video Broadcasting, c/o European Broadcasting Union, Geneva, Switzerland, DVB SB 5 (94) 5, Mar. 2, 1994, pp. 1-38.

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