发明名称 Digital television transmitter/receiver and method of processing data in digital television transmitter/receiver
摘要 A digital television (DTV) transmitter and a method of coding data in the DTV transmitter are disclosed. A data formatter generates an enhanced data packet including the enhanced data and a known data sequence. A data randomizer randomizes the enhanced data packet. A RS encoder RS-codes the randomized data packet by adding first parity data, and a data interleaver interleaves the RS-coded data packet. A trellis encoding unit trellis-encodes the interleaved data packet. Herein the trellis encoding unit includes a TCM encoder for generating a first output bit by trellis-encoding a first input bit and generating a second output bit by bypassing the first input bit, and a pre-coder for generating a third output bit by pre-coding a second input bit, wherein memories included in the TCM encoder and the pre-coder are initialized when the known data sequence is inputted to the trellis encoding unit.
申请公布号 USRE45668(E1) 申请公布日期 2015.09.08
申请号 US201414250287 申请日期 2014.04.10
申请人 LG ELECTRONICS INC. 发明人 Choi In Hwan
分类号 H04L5/12;H04L27/34;H04L1/00;H04N21/238 主分类号 H04L5/12
代理机构 Lee, Hong, Degerman, Kang & Waimey 代理人 Lee, Hong, Degerman, Kang & Waimey
主权项 1. A id="REI-00002" date="20150908" transmitter ofid="REI-00002" id="REI-00003" date="20150908" transmitter for transmitting id="REI-00003" a digital broadcast signal, the transmitter comprising: an encoder configured to encode enhanced data; a packet formatter configured to generate enhanced data packets including the encoded enhanced data and known data sequences; a first multiplexer configured to multiplex the enhanced data packets and main data packets having main data; a data randomizer configured to randomize the main data in the multiplexed data packets; a data interleaver configured to interleave data of the enhanced data packets in the multiplexed data packets and the randomized main data; a trellis encoder configured to trellis-encodeencoding unit that includes a second multiplexer and a trellis encoder having memories, wherein the second multiplexer selects the interleaved data or initialization data obtained based on values of the memories, wherein the trellis encoder trellis-encodes the selected data, and and to initializewherein the memories included in the trellis encoderare initialized by using the initialization data at a start of at least one of the known data sequences; a backward-compatibility processor configured to generate parity data based on the initialization data and provide the generated parity data to the trellis encoderencoding unit; and a transmission unit configured to transmit a transmission frame including the trellis encoded data, wherein the transmission frame has a plurality of segments, and wherein the known data sequences are located in specific segments of the transmission frame.
地址 Seoul KR