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 |