Patent ID: 9596116
Date: 2017-03-14
CPC Classifications: H03M,H04H,H04L

Claim:
1. A method for transmitting broadcast signals, the method comprising: encoding service data; bit interleaving the encoded service data, wherein the bit interleaving includes: first interleaving the encoded service data, wherein the first interleaving interleaves parity bits of the encoded service data, wherein the first interleaved service data includes a number of blocks; second interleaving the number of blocks in the first interleaved service data by using an interleaving pattern for a combination of QPSK modulation type, 7/15 code rate, and 16K code word length of the encoded service data, and each block has 360 bits, wherein the interleaving pattern is represented as wherein j-th block of the number of blocks is interleaved by a block unit according to the interleaving pattern; third interleaving the second interleaved service data, wherein the third interleaving performs: building at least one signal frame including the bit interleaved service data; modulating data in the built at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme; and transmitting the broadcast signals having the modulated data.