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

摘要

A DTV transmitting system includes a frame encoder, a randomizer, a block processor, a group formatter, a deinterleaver, and a packet formatter. The frame encoder builds an enhanced data frame and encodes the frame two times for first and second error correction, respectively. It further permutes a plurality of encoded data frames. The randomizer randomizes the permuted enhanced data, and the block processor codes the randomized data at a rate of 1/N1. The group formatter forms a group of enhanced data having one or more data regions and inserts the data coded at the rate of 1/N1 into at least one of the data regions. The deinterleaver deinterleaves the group of enhanced data, and the packet formatter formats the deinterleaved data into enhanced data packets.

主权项

1. A id="REI-00008" date="20151027" digital television (DTV)id="REI-00008" id="REI-00009" date="20151027" broadcast id="REI-00009" transmitting system for processing digital broadcast data, the id="REI-00010" date="20151027" DTVid="REI-00010" id="REI-00011" date="20151027" broadcast id="REI-00011" transmitting system comprising:
a first randomizer for randomizing enhanced data; a Reed-Solomon (RS) frame encoder for generating an RS frame by adding RS parity data to bottom ends of columns of an RS frame payload and adding Cyclic Redundancy Check (CRC) data to right ends of rows of the RS frame payload having the RS parity data, the RS frame payload including the randomized enhanced data; a block processor for encoding a first data portion in the RS frame with a first coding rate and encoding a second data portion in the RS frame with a second coding rate; a group formatter for mapping the encoded first data portion into a first region of at least one data group, mapping the encoded second data portion into a second region of the at least one data group, and adding known data sequences, signaling information, RS parity data place holders, main data place holders and MPEG header data place holders to the at least one data group; a packet formatter for removing the RS parity data place holders and the main data place holders and replacing the MPEG header data place holders with MPEG header data in order to output enhanced data packets; a multiplexer for multiplexing the enhanced data packets with main data packets including main data; a second randomizer for randomizing the multiplexed main data packets and the MPEG header data in the multiplexed enhanced data packets; a trellis encoding unit for trellis encoding data of the randomized main data packets and data of the enhanced data packets having the randomized MPEG header data; and a transmitting unit for transmitting the trellis encoded data.