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Table 8 Optimized transmission parameters for an 8-MHz bandwidth (4 K UHD layer: 256 QAM modulation, HD layer: 16 QAM modulation)

From: A study of development of transmission systems for next-generation terrestrial 4 K UHD and HD convergence broadcasting

Number Total data rate (bps) 4 K layer data rate (bps) HD layer data rate (bps) 4 K layer code rate (bps) HD layer code rate FFT size Guard interval Pilot mode Number of syms a Frame length Extended mode Frame-closing symbol
1 30,318,345 23,101,054 7,217,290 4/5 3/4 1,024 1/8 PP2 1,900 243.51 ms No Yes
2 30,251,372 23,039,165 7,197,955 4/5 3/4 2,048 1/8 PP2 950 243.51 ms No Yes
3 31,008,536 23,919,515 7,089,020 3/4 2/3 2,048 1/16 PP4 1,000 249.16 ms No Yes
4 30,508,286 23,245,780 7,262,506 4/5 3/4 4,096 1/8 PP2 475 241.64 ms No Yes
5 31,294,731 24,140,281 7,154,449 3/4 2/3 4,096 1/16 PP4 500 240.13 ms No Yes
  1. aNumber of OFDM symbols in a frame.