Patent ID: 6591391
Filing Date: 2003-07-08
Classification: H03M,H04L,H04N

Abstract:
Apparatus for generating 8-VSB modulated signals for use in high definition television, comprising,randomizer means executed by software to which MPEG II data signals are adapted to be supplied for generating a pseudorandom number field and which spreads the energy tin its output signal evenly across an HDTV channel frequency range, first encoder means executed by software for dividing the processed MPEG II data from said randomizer means into 188 packets with each packet containing an additional sync byte packet and for creating a plurality of additional bytes of correction information which are added to the said 188 packets, interleaver means executed by software which mutually separates data bytes from said encoder means and interleaves said separated data bytes over a plurality of segments, second encoder means including a trellis encoder which breaks the 8-bit bytes of data from said interleaver into four 2-bit words and to convert said signal of 2-bit words into a 3-bit coded signal comprising a plurality of 3-bit data words, and an 8-VSB modulator for converting each 3-bit data word from the output of said second encoder means into one of eight voltage levels to provide a baseband 8-VSB modulated signal.