Enhanced VSB Viterbi decoder

摘要

An enhanced VSB receiver includes a tuner which tunes an RF signal and converts it into an IF signal, an IF mixer which converts the IF signal into a baseband signal, and a demodulator which demodulates the baseband signal into a VSB signal. The enhanced VSB receiver further includes a map recovery unit which recovers VSB map information of the VSB signal, an enhanced equalizer for compensating channel distortion of the VSB signal and outputting an equalized symbol, and an enhanced Viterbi decoder for estimating whether polarity inversion occurred during a symbol period of the equalized symbol and Viterbi-decoding the equalized symbol based on the polarity estimation.

主权项

1. A method for processing a id="REI-00007" date="20150505" digital television (DTV)id="REI-00007" broadcast signal in a id="REI-00008" date="20150505" broadcastingid="REI-00008" id="REI-00009" date="20150505" broadcast id="REI-00009" receiver, the method comprising:
receiving, by a tuner, the DTV broadcast signal including enhanced data; equalizing the received DTV broadcast signal by compensating channel distortion of the received DTV broadcast signal; decoding signaling information from the equalized DTV broadcast signal, wherein the signaling information includes information indicating whether the enhanced data are coded at a ½ code rate or at a ¼ code rate; decoding, by a decoder, the enhanced data included in the equalized DTV broadcast signal; and derandomizing, by a derandomizer, the decoded enhanced data, wherein the enhanced data in the received DTV broadcast signal are generated in a broadcast transmitter by: randomizing original enhanced data, first Reed Solomon (RS) encoding the randomized original enhanced data, convolutional encoding the first RS-encoded original enhanced data, second RS encoding the convolutional encoded original enhanced data, interleaving the second RS-encoded original enhanced data, and trellis encoding the interleaved original enhanced data.