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-9705718-B2
Application number	US-201615284151-A
Country	US
Kind code	B2
Filing date	Oct 3, 2016
Priority date	Nov 29, 2013
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

An apparatus including an encoder for encoding service data corresponding to each of a plurality of data transmission path, an encoder for encoding signaling data, wherein the signaling data includes static data and dynamic data, a frame builder for building signal frames, wherein each of signal frames includes the encoded service data and the encoded signaling data, wherein each of signal frames belongs to one of the broadcast services, wherein the static data remain constant in the signal frames belonging to the broadcast service in a duration of a super frame and the dynamic data changes by the signal frames, a modulator for modulating the signal frames by an OFDM (Orthogonal Frequency Division Multiplex) scheme and a transmitter for transmitting the broadcast signals carrying the modulated signal frames.

First claim

What is claimed is:

1. A method for transmitting broadcast signals, comprising:
encoding service data corresponding to each of a plurality of data transmission paths;
encoding signaling data;
padding zero bits to the encoded signaling data, wherein a size of the padded zero bits is related to the variable size of the signaling data;
LDPC encoding the zero padded signaling data by appending parity bits;
building signal frames, wherein each of signal frames includes the encoded service data and the LDPC encoded signaling data;
modulating the signal frames by an OFDM (Orthogonal Frequency Division Multiplex) scheme; and
transmitting the broadcast signals carrying the modulated signal frames.

2. The method of claim 1 , wherein the method further comprises:
segmenting the signaling data for the encoding.

3. The method of claim 1 , wherein the method further comprises:
time interleaving the encoded service data by a skip operation.

4. The method of claim 1 , wherein the method further comprises:
adding additional parity bits for next signal frame into a current frame, wherein a number of additional parity bits is decided based on the variable size of the signaling data in the current frame.

5. The method of claim 2 , wherein the method further comprises:
scrambling the segmented signaling data.

6. An apparatus for transmitting broadcast signals, the apparatus comprising:
an encoder to encode service data corresponding to each of a plurality of data transmission paths;
a signaling encoder to encode signaling data;
a padding module to pad zero bits to the encoded signaling data, wherein a size of the padded zero bits is related to the variable size of the signaling data;
an LDPC encoder to LDPC encode the zero padded signaling data by appending parity bits;
a frame builder to build signal frames, wherein each of signal frames includes the encoded service data and the LDPC encoded signaling data;
a modulator to modulate the signal frames by an OFDM (Orthogonal Frequency Division Multiplex) scheme; and
a transmitter to transmit the broadcast signals carrying the modulated signal frames.

7. The apparatus of claim 6 , wherein the apparatus further comprises:
a segmentation module to segment the signaling data for encoding.

8. The apparatus of claim 6 , wherein the apparatus further comprises:
a time interleaver to time interleave the encoded service data by a skip operation.

9. The apparatus of claim 8 , wherein the apparatus further comprises:
an adder to add additional parity bits for next signal frame into a current frame, wherein a number of additional parity bits is decided based on the variable size of the signaling data in the current frame.

10. The apparatus of claim 7 , wherein the apparatus further comprises:
a scrambler to scramble the segmented signaling data.

Assignees

• Lg Electronics Inc

Inventors

• Kim Jinwoo
• Shin Jongwoong
• Ko Woosuk
• Hwang Jaeho
• Hong Sungryong

Classifications

• H04L1/0071

  Use of interleaving (interleaving per se H03M13/27) · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H03M13/6356

  by repetition or insertion of dummy data, i.e. rate reduction · CPC title

• H03M13/2906

  using block codes (H03M13/2957 takes precedence) · CPC title

• H03M13/255

  with Low Density Parity Check [LDPC] codes · CPC title