# US 2015/0146802 A1 · 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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- Number: US 2015/0146802 A1
- Document ID: US20150146802A1
- Status: Published application
- Kind: A1
- Application number: 14/540,519
- Filed: 2014-11-13
- Published: 2015-05-28
- Earliest claimed: 2013-11-25
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Jongwoong SHIN; Jinwoo KIM; Woosuk KO; Jaeho HWANG; Sungryong HONG
- Web page: https://patentgrep.com/patent/US20150146802A1

## CPC

- H04L 27/2646: {using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length}
- H04H 20/33: by plural channels
- H04H 20/423: {Transmitter side}
- H04L 1/0042: {Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape (H04L1/0067 takes precedence)}
- H04L 1/0048: {in conjunction with detection of multiuser or interfering signals, e.g. iteration between CDMA or MIMO detector and FEC decoder (for spatial equalizer H04L25/03286)}
- H04L 1/0057: {Block codes (H04L1/0061, H04L1/0064 take precedence)}
- H04L 1/0063: {Single parity check}
- H04L 1/0064: {Concatenated codes}
- H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)}
- H04L 1/0083: {Formatting with frames or packets; Protocol or part of protocol for error control}
- H04L 1/009: {arrangements specific to transmitters}
- H04L 1/0091: {arrangements specific to receivers, e.g. format detection (detection of data rate H04L25/0262; detection of coding rate H04L1/0046)}
- H04L 1/0625: {Transmitter arrangements}
- H04L 1/0631: {Receiver arrangements}
- H04L 27/2601: {Multicarrier modulation systems}
- H04H 20/59: for emergency or urgency
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04H: BROADCAST COMMUNICATION (multiplex communication H04J; pictorial communication aspects of broadcast systems H04N)

## Abstract

A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for transmitting broadcast signals, the apparatus comprises an encoder for encoding service data corresponding to each of a plurality of data transmission path, wherein each of the data transmission path carries at least one service component, an encoder for encoding signaling data and information data about emergency, a frame builder for building at least one signal frame including the encoded service data, the encoded signaling data and the encoded information data about emergency, a modulator for modulating the at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme and a transmitter for transmitting the broadcast signals carrying the at least one modulated signal frame.

## Claims

### Claim 1

A method for transmitting broadcast signals, the method comprising:
encoding service data corresponding to each of a plurality of data transmission path, wherein each of the data transmission path carries at least one service component;
encoding signaling data and information data about emergency;
building at least one signal frame including the encoded service data, the encoded signaling data and the encoded information data about emergency;
modulating the at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme; and
transmitting the broadcast signals carrying the at least one modulated signal frame.

### Claim 2 (depends on 1)

The method of claim 1, the encoding the signaling data including:
FEC encoding the signaling data;
interleaving the FEC encoded signaling data by a bit interleaving scheme; and
mapping the interleaved signaling data to constellation symbols.

### Claim 3 (depends on 2)

The method of claim 2, the bit interleaving scheme is applied according to a modulation order.

### Claim 4 (depends on 3)

The method of claim 3, when the modulation order is BPSK, the interleaving the FEC encoded signaling data is based on a cyclic shifting value, wherein the cyclic shifting value is determined according to a length of the FEC encoded signaling data.

### Claim 5 (depends on 2)

The method of claim 2, the encoding the signaling data further includes demultiplexing the interleaved signaling data according to the modulation order.

### Claim 6

A method for receiving broadcast signals, the method comprising:
receiving the broadcast signals;
demodulating the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme;
parsing at least one signal frame from the demodulated broadcast signals including information data about emergency, signaling data and service data;
decoding the signaling data; and
decoding the service data corresponding to each of a plurality of data transmission units based on the signaling data, wherein each of the data transmission unit carries at least one service component.

### Claim 7 (depends on 6)

The method of claim 6, the decoding the signaling data including:
demapping the signaling data;
deinterelaving the demapped signaling data by a bit deinterleaving scheme; and
decoding the deinterelaved signaling data by an FEC decoding scheme.

### Claim 8 (depends on 7)

The method of claim 7, the deinterelaving scheme is applied according to a modulation order.

### Claim 9 (depends on 8)

The method of claim 8, when the modulation order is BPSK, the deinterleaving the demapped signaling data is based on a cyclic shifting value, wherein the cyclic shifting value is determined according to a length of the signaling data.

### Claim 10 (depends on 7)

The method of claim 7, the decoding the signaling data further includes multiplexing the demapped signaling data.

### Claim 11

The apparatus for transmitting broadcast signals, the apparatus comprising:
an encoder for encoding service data corresponding to each of a plurality of data transmission path, wherein each of the data transmission path carries at least one service component;
an encoder for encoding signaling data and information data about emergency;
a frame builder for building at least one signal frame including the encoded service data, the encoded signaling data and the encoded information data about emergency;
a modulator for modulating the at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme; and
a transmitter for transmitting the broadcast signals carrying the at least one modulated signal frame.

### Claim 12 (depends on 11)

The method of claim 11, the encoder for the encoding the signaling data including:
an FEC encoder for FEC encoding the signaling data;
an interleaver for interleaving the FEC encoded signaling data by a bit interleaving scheme; and
a mapper for mapping the interleaved signaling data to constellation symbols.

### Claim 13 (depends on 12)

The method of claim 12, the bit interleaving scheme is applied according to a modulation order.

### Claim 14 (depends on 13)

The method of claim 13, when the modulation order is BPSK, the interleaving the FEC encoded signaling data is based on a cyclic shifting value, wherein the cyclic shifting value is determined according to a length of the FEC encoded signaling data.

### Claim 15 (depends on 12)

The method of claim 12, the encoder for the encoding the signaling data further includes a demultiplexer for demultiplexing the interleaved signaling data according to the modulation order.

### Claim 16

The apparatus for receiving broadcast signals, the apparatus comprising:
a receiver for receiving the broadcast signals;
a demodulator for demodulating the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme;
a frame parser for parsing at least one signal frame from the demodulated broadcast signals including information data about emergency, signaling data and service data;
a decoder for decoding the signaling data; and
a decoder for decoding the service data corresponding to each of a plurality of data transmission units based on the signaling data, wherein each of the data transmission unit carries at least one service component.

### Claim 17 (depends on 16)

The method of claim 16, the decoder for the decoding the signaling data including:
a demapper for demapping the signaling data;
a deinterleaver for deinterelaving the demapped signaling data by a bit deinterleaving scheme; and
a decoder for decoding the deinterelaved signaling data by an FEC decoding scheme.

### Claim 18 (depends on 17)

The method of claim 17, the deinterelaving scheme is applied according to a modulation order.

### Claim 19 (depends on 18)

The method of claim 18, when the modulation order is BPSK, the deinterleaving the demapped signaling data is based on a cyclic shifting value, wherein the cyclic shifting value is determined according to a length of the signaling data.

### Claim 20 (depends on 17)

The method of claim 17, the decoder for the decoding the signaling data further includes a multiplexer for multiplexing the demapped signaling data.