DS3 to ASI converter with reduced memory

Details DS3 to ASI converter with reduced memory DS3 to ASI converter with reduced memory

2005-01-06

2008-11-04

Ngo, Ricky (Department: 2616)

Multiplex communications

Communication techniques for information carried in plural...

Adaptive

C370S503000

Reexamination Certificate

active

07447231

ABSTRACT:
Converting a DS3 transport stream to MPEG-2 packets over an ASI transport stream includes extracting MPEG-2 packets along with PCR values, calculating a new PCR value to compensate for packet time shift, and replacing the extracted PCR value with the new PCR value prior to outputting MPEG-2 packets. An apparatus for processing a DS3 transport stream carrying an MPEG-2 payload includes a DS3 receiver to receive the stream and to output a data signal and clock signal. The DS3 receiver includes a DS3 interface to receive DS3 packets and discard null packets, and includes PCR correction to determine if received DS3 packets include PCR values and to adjust PCR values prior to outputting the MPEG-2 packet. Packets are output without storing each packet in a buffer, but storing the PCR value in the buffer.

REFERENCES:
patent: 5640388 (1997-06-01), Woodhead et al.
patent: 6185215 (2001-02-01), Aho
patent: 6493362 (2002-12-01), Inazumi
patent: 2003/0223466 (2003-12-01), Noronha et al.

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