A. Touzni, C. Strolle, M. Fimoff, and V. Bretl (USA)
HDTV, 8-VSB, Terrestrial broadcast.
We present a new robust backward compatible 8-VSB transmission
system for HDTV terrestrial broadcast. The new transmission sys
tem allows better reception of signals for portable, mobile and indoor
receivers. In the proposed system a scalable fraction of the main ser
vice is used to transmit robustly encoded data. The robust service has
at least a 6 dB fade margin advantage over the main service. In ad
dition, the data allocated to the robust stream can also be used at the
receiver to improve the reception of the normal stream. The robust
data is utilized by the normal stream receiver as randomly distributed
training symbols which can be used in the equalizer to improve the
receiver performance for dynamic mutli-path channels.