Patent ID: 8718189

Claim:
Transmitter apparatus for a digital broadcasting system, said transmitter apparatus comprising: a source of successive time-slices of first digital data alternating with successive time-slices of second digital data that are bit-complemented repeats of respective ones of said successive time-slices of said first digital data as delayed by a prescribed delay interval longer than several ones of said time-slices, each of said time-slices composed of at least a few thousands of serial bits; apparatus for forward-error-correction (FEC) coding successive bits of said successive time-slices of first digital data alternating with successive time-slices of second digital data, thus to generate bit-wise forward-error-correction coding with a reduced code rate; a modulation symbol constellation mapper for mapping consecutive groups of bits of said bit-wise forward-error-correction coding to respective ones of successive modulation symbol constellations and apparatus for transmitting a radio-frequency digital broadcasting signal modulated in accordance with said successive modulation symbol constellations.