Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals
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United States of America Patent
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Dec 18, 2018
Grant Date -
Oct 19, 2017
app pub date -
Jun 28, 2017
filing date -
Dec 29, 2014
priority date (Note) -
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Abstract
A method is provided for transmitting broadcast signals. The method includes encoding, by an encoder, service data, encoding, by a signaling encoder, signaling data based on modes of the signaling data, wherein the signaling data is categorized into each mode representing a Low Density Parity Check (LDPC) code rate and a modulation order for the signaling data, building, by a frame builder, at least one signal frame including the encoded service data in at least one data symbol and the encoded signaling data in at least one signaling symbol, modulating, by a modulator, data in the at least one signal frame by an Orthogonal Frequency Division Multiplex (OFDM) scheme, and transmitting, by a transmitter, the broadcast signals carrying the modulated data in the at least one signal frame. One of the modes for the signaling data represents a 6/15 LDPC code rate and a Quadrature Phase Shift Keying (QPSK) modulation.
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