DTV transmitting system and receiving system and method of processing broadcast signal

摘要

A DTV transmitting system includes a pre-processor, a block processor, and a trellis encoder. The pre-processor pre-processes enhanced data by expanding the enhanced data at an expansion rate of 1/H. The block processor includes a first converter, a symbol encoder, a symbol interleaver, and a second converter. The first converter converts the expanded data into symbols. The symbol encoder encodes each valid enhanced data bit in the symbol at an effective coding rate of 1/H. The symbol interleaver interleaves the encoded symbols, and the second converter converts the interleaved symbols into enhanced data bytes. The trellis encoder trellis-encodes the enhanced data outputted from the block processor.

主权项

id="REI-00003" date="20161004" 1. A digital television (DTV) transmitter for processing digital broadcast data, the DTV transmitter comprising:
a randomizer configured to randomize enhanced data; a first encoder configured to generate a Reed Solomon (RS) frame by adding RS parity data and cyclic redundancy check (CRC) data to the randomized enhanced data; a second encoder configured to encode the enhanced data in the RS frame with an encoding rate of 1/H, wherein H≧2; a symbol interleaver configured to interleave symbols corresponding to the encoded enhanced data, wherein the symbol interleaver interleaves the symbols by:
calculating L, wherein L=2m, and wherein m is an integer,listing all permuted positions P′(i) in ascending order of i according to the following equation: P′(i)={89*i*(i+1)/2} mod L, wherein i is a natural number from 0 to L−1,discarding all P′(i) that are P′(i)≧B, wherein B is a block length of symbols input to the symbol interleaver, andcondensing the list by, starting with a lowest i, shifting P(i) entries to the left to fill empty locations created by the discarding; a group formatter configured to map enhanced data corresponding to the interleaved symbols into data groups, wherein at least one of the data groups further includes known data sequences, signaling information and moving picture experts group (MPEG) header place holders; a deinterleaver configured to deinterleave data of the data groups; a packet formatter configured to replace the MPEG header place holders in the deinterleaved data with MPEG header data and output enhanced data packets; an interleaver configured to interleave data in the enhanced data packets; and a modulator configured to modulate a broadcast signal having the interleaved data.