Digital broadcasting system and data processing method that carries broadcast data using IP packets

• US 9,948,960 B2
• Filed: 11/30/2016
• Issued: 04/17/2018
• Est. Priority Date: 06/28/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Song, Jae Hyung, Choi, In Hwan, Hong, Ho Taek, Kwak, Kook Yeon, Kim, Byoung Gill, Suh, Jong Yeul, Kim, Jin Pil, Song, Won Gyu, Lee, Chul Soo, Kim, Jin Woo, Lee, Hyoung Gon, Lee, Joon Hui
• Primary Examiner(s): Pezzlo, John
• Application Number:
  US15/365,856
• Publication Number:
  US 20170085920A1
• Time in Patent Office: 503 Days
• Field of Search: 370252, 370389, 370386, 370329
• CPC Class Codes: H04H 20/55 for traffic information
• CPC Class Codes: H04H 20/95 characterised by a specific format, e.g. an encoded audio stream
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0058 Block-coded modulation
• CPC Class Codes: H04L 1/006 Trellis-coded modulation
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/007 Unequal error protection for format H04L1/0078; for codes per se H03M13/35
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04N 21/234 Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/2383 Channel coding or modulation of digital bit-stream, e.g. QPSK modulation arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/41407 embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/4345 Extraction or processing of SI, e.g. extracting service information from an MPEG stream
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• CPC Class Codes: H04N 21/4382 Demodulation or channel decoding, e.g. QPSK demodulation analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/64322 IP

Abstract

A digital broadcasting system and a method of processing data are disclosed, which are robust to error when mobile service data are transmitted. To this end, additional encoding is performed for the mobile service data, whereby it is possible to strongly cope with fast channel change while giving robustness to the mobile service data.

Claims

1. A method of transmitting broadcast data, the method comprising:

encoding the broadcast data by adding parity data;

interleaving the encoded broadcast data;

encoding first signaling data;

allocating the interleaved broadcast data and the encoded first signaling data to frames;

modulating the frames; and

transmitting a broadcast signal carrying the modulated frames,

wherein the first signaling data includes a code rate for encoding the broadcast data and information related to fast service acquisition information,

wherein the fast service acquisition information allows a receiver to quickly locate upper layer signaling information,

wherein the modulated frames include link layer packets,

wherein the link layer packets carry service signaling data for discovering a service provided by the encoded broadcast data,

wherein the link layer packets further carry Internet Protocol (IP) packets, and

wherein the IP packets carry Asynchronous Layered Coding (ALC)/Layered Coding Transport (LCT) packets that include the broadcast data.

2. An apparatus for transmitting broadcast data, the apparatus comprising:

a first encoder for encoding the broadcast data by adding parity data;

an interleaver for interleaving the encoded broadcast data;

a second encoder for encoding first signaling data;

a builder for allocating the interleaved broadcast data and the encoded first signaling data to frames;

a modulator for modulating the frames; and

a transmitter for transmitting a broadcast signal carrying the modulated frames,

wherein the first signaling data includes a code rate for encoding the broadcast data and information related to fast service acquisition information,

wherein the fast service acquisition information allows a receiver to quickly locate upper layer signaling information,

wherein the modulated frames include link layer packets,

wherein the link layer packets carry service signaling data for discovering a service provided by the encoded broadcast data,

wherein the link layer packets further carry Internet Protocol (IP) packets, and

wherein the IP packets carry Asynchronous Layered Coding (ALC)/Layered Coding Transport (LCT) packets that include the broadcast data.

3. A method of receiving broadcast data, the method comprising:

receiving a broadcast signal carrying modulated frames;

demodulating the frames carried by the broadcast signal, the frames including link layer packets;

parsing the link layer packets and signaling data from the demodulated frames,

wherein the link layer packets carry service signaling data for discovering a service provided by the broadcast data,

wherein the link layer packets further carry Internet Protocol (IP) packets, and

wherein the IP packets carry Asynchronous Layered Coding (ALC)/Layered Coding Transport (LCT) packets that include the broadcast data;

decoding the signaling data; and

decoding the broadcast data included in the IP packets.

4. An apparatus for receiving broadcast data, the apparatus comprising:

a receiver for receiving a broadcast signal carrying modulated frames;

a demodulator for demodulating the frames carried by the broadcast signal, the frames including link layer packets;

a parser for parsing the link layer packets and first signaling data from the demodulated frames,

wherein the link layer packets carry service signaling data for discovering a service provided by the broadcast data, wherein the link layer packets further carry Internet Protocol (IP) packets, and

wherein the IP packets carry Asynchronous Layered Coding (ALC)/Layered Coding Transport (LCT) packets that include the broadcast data;

a first decoder for decoding the signaling data; and

a second decoder for decoding the broadcast data included in the IP packets.