Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals

Patent metadata

Field	Value
Publication number	US-10158517-B2
Application number	US-201715694048-A
Country	US
Kind code	B2
Filing date	Sep 1, 2017
Priority date	Feb 6, 2015
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

A method for transmitting broadcast signals includes encoding service data; mapping the encoded service data to symbols; building a signal frame including the symbols; and frequency interleaving the symbols in the signal frame. After an interleaving sequence is generated based on a toggle bit, a basic interleaving sequence, and a symbol offset, it is checked whether or not an address of the generated interleaving sequence is within a range of an OFDM symbol being frequency-interleaved. After checking the address, the symbols are frequency interleaved using the interleaving sequence, and when the FFT size is 32K, a single permutation is applied to the basic interleaving sequence, and when the FFT size is 8K or 16K, different permutations are applied to the basic interleaving sequence.

First claim

What is claimed is:

1. A method for transmitting broadcast signals, the method comprising:
encoding service data;
mapping the encoded service data to symbols;
building a signal frame including the symbols;
frequency interleaving the symbols in the signal frame,
wherein after an interleaving sequence is generated based on a toggle bit, a basic interleaving sequence, and a symbol offset, it is checked whether or not an address of the generated interleaving sequence is within a range of an OFDM symbol being frequency-interleaved,
wherein after checking the address, the symbols are frequency interleaved using the interleaving sequence, and
wherein when the FFT size is 32K, a single permutation is applied to the basic interleaving sequence, and when the FFT size is 8K or 16K, different permutations are applied to the basic interleaving sequence; and
modulating the frequency interleaved symbols and transmitting the modulated symbols via the broadcast signals.

2. An apparatus for transmitting broadcast signals, the apparatus comprising:
an encoder to encode service data;
a symbol mapper to map the encoded service data to symbols;
a framing block to build a signal frame including the symbols;
a frequency interleaver to frequency interleave the symbols in the signal frame,
wherein after an interleaving sequence is generated based on a toggle bit, a basic interleaving sequence, and a symbol offset, it is checked whether or not an address of the generated interleaving sequence is within a range of an OFDM symbol being frequency-interleaved,
wherein after checking the address, the symbols are frequency interleaved using the interleaving sequence, and
wherein when the FFT size is 32K, a single permutation is applied to the basic interleaving sequence, and when the FFT size is 8K or 16K, different permutations are applied to the basic interleaving sequence; and
a waveform generator to modulate the frequency interleaved symbols and to transmit the modulated symbols via the broadcast signals.

Assignees

• Lg Electronics Inc

Inventors

• Baek Jongseob
• Ko Woosuk
• Hong Sungryong

Classifications

• H04L2001/0093

  Point-to-multipoint · CPC title

• H04L1/0045

  Arrangements at the receiver end · CPC title

• H04L1/0041

  Arrangements at the transmitter end · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04L27/2637

  with direct modulation of individual subcarriers · CPC title