and apparatus for generating an alternate decision statistic for determining detection of the fec frame header application_number US 201013378136 A description an approach for fec frame header processing suitable for use in the digital video broadcasting c2 broadcast standard is described herein two encoding schemes for generating an fecframe header are shown in the fig1 a and 1 b initially the 16 bits of the l1 signaling part 1 are fec encoded by a reed muller 32 16 encoder subsequently each bit of the 32 bit reed muller codeword is split to form an upper and a lower branch the lower branch applies a cyclic shift within each reed muller codeword and scrambles the resulting data using a specific pn sequence called an mps sequence the difference in the two encoding schemes is that a qpsk constellation is used for the robust fecframe header and a 16qam constellation is used for the high efficiency fecframe header the structure of the information bits within the fec frame header and the position of the header within a data slice packet is shown in fig1 c thus in a receiver from received qpsk symbols in the robust mode or received 16 qam symbols in the high efficiency mode to generate an estimated 32 bit rm codeword you will need.