Recursive metric for NTSC interference rejection in the ATSC-HDTV trellis decoder
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United States of America Patent
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-
Jun 1, 2004
Grant Date -
Mar 28, 2002
app pub date -
Sep 19, 2001
filing date -
Dec 13, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a system for receiving a signal containing digital data representing HDTV image information in the form of multilevel symbols formatted into groups of successive fields, each field comprising a field segment, a plurality of data segments, and associated sync components, the received signal is demodulated to produce a demodulated signal. The demodulated signal is comb-filtered to reject NTSC co-channel interference to produce a filtered signal. The filtered signal is trellis decoded with a trellis decoder employing a recursive non-Euclidean metric.
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