Patent ID: 9647795
Date: 2017-05-09
CPC Classifications: H03M,H04H,H04L

Claim:
1. A transmitter for transmitting at least one broadcast signal having PLP (Physical Layer Pipe) data, the transmitter comprising: a BCH (Bose-Chadhuri-Hocquenghem) encoder to BCH encode the PLP data; an LDPC (Low Density Parity Check, LDPC) encoder to LDPC encode the BCH encoded PLP data and output FECFrames (Forward Error Correction Frames), wherein the PLP data are processed by an LDPC scheme for a long LDPC FECframe or a short LDPC FECframe; a mapper to map data in the FECFrames onto constellations by QAM (Quadrature Amplitude Modulation) schemes; an outer encoder to outer encode signaling information; a zero-padding module to insert zeros into the outer encoded signaling information; an inner encoder to inner encode the zero-inserted signaling information; a parity puncturing module to puncture parity bits of the inner encoded signaling information; a zero-removing module to remove the inserted zeros from the signaling information on which the parity puncturing is performed; a time-interleaver to perform time-interleaving the mapped data based on a skip operation, wherein the time-interleaver writes the mapped data into an interleaving block and reads out the written data from the interleaving block excluding cells which are skipped according to the skip operation, wherein the time-interleaving is performed by calculating positions for cells having the mapped data and the cells to be skipped based on a row index, a column index and a twisting parameter, wherein the twisting parameter is used for accessing each cell having the mapped data in a diagonal direction; a frame builder to build a signal frame including preamble symbols and data symbols, wherein the preamble symbols include the zero-removed signaling information for the time interleaved data and the data symbols include the time interleaved data; and an OFDM (Orthogonal Frequency Division Multiplexing) modulator to modulate data in the signal frame by an OFDM scheme, wherein the signaling information includes channel bonding information for the at least one broadcast signal.