Patent ID: 9667380
Date: 2017-05-30
CPC Classifications: G06F,H03M,H04B,H04L

Claim:
1. A method of transmitting broadcast signals, the method including: formatting, by an input formatting block, input streams into plural PLPs(Physical Layer Pipes); encoding, by an encoder, data in the plural PLPs; time interleaving, by a time interleaver, the encoded data in the plural PLPs, wherein the time interleaving includes: cell interleaving, by a cell interleaver, the encoded data by writing the cells in a FEC (Forward Error Correction) block into a memory linearly and reading the cells from the memory randomly by using a permutation sequence; and block interleaving by a block interleaver the cell interleaved data by column-wise writing at least one FEC block and at least one virtual FEC block, wherein the at least one virtual FEC block is ahead of the at least one FEC block in a TI (Time Interleaving) block and diagonal-wise reading out the written at least one FEC block and skipping the virtual FTC block; frame mapping, by a framer, the time interleaved data onto at least one signal frame; and waveform modulating, by a waveform block, the mapped data in the at least one signal frame and transmitting, by the waveform block, broadcast signals having the modulated data.