A DTV signal has a plural-data-segment frame header including complementary first and second ghost-cancellation reference signals differentially delayed by the duration of two NTSC horizontal scan lines. A receiver for such DTV signal has an adaptive equalizer for baseband symbol code with kernel weights...http://www.google.co.uk/patents/US7038732?utm_source=gb-gplus-sharePatent US7038732 - DTV signal with GCR components in plural-data-segment frame headers and receiver apparatus for such signal
