ATV/MPEG sync system

Details ATV/MPEG sync system ATV/MPEG sync system

1995-06-07

1997-02-11

Kostak, Victor R.

Television

Format

Of sync signal

348423, 348471, H04N 504

Patent

active

056025955

ABSTRACT:
An ATV system encodes variable length elementary streams of data into a multilevel symbol signal comprising a plurality of multiplexed fixed length data packets without sync information. The fixed length data packets are arranged in fields of repetitive data segments, each of which includes a data segment sync and each field of which includes a field sync. The fields of data segments are transmitted as suppressed carrier VSB modulation. In an ATV receiver, the data segment sync is used to generate a timing signal that identifies the beginning of each fixed length data packet. In one embodiment, a packet sync signal is inserted into each recovered fixed length data packet for recovering the elementary streams of data. In another embodiment, recovery of the elementary streams of data is accomplished without inserting a packet sync signal.

REFERENCES:
patent: 5072449 (1991-12-01), Enns et al.
patent: 5396497 (1995-03-01), Veltman
patent: 5486864 (1996-01-01), Zdepski
patent: 5534938 (1996-07-01), Citta et al.

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