Broadcast signal transmitting apparatus, broadcast signal receiving apparatus, and broadcast signal transceiving method in broadcasting signal transmitting and receiving apparatuses

• US 9,769,635 B2
• Filed: 11/14/2014
• Issued: 09/19/2017
• Est. Priority Date: 11/23/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Hong, Hotaek, Ko, Woosuk, Moon, Sangchul
• Primary Examiner(s): HOANG, THAI D
• Application Number:
  US14/542,062
• Publication Number:
  US 20150071153A1
• Time in Patent Office: 1,040 Days
• Field of Search: 370335-345, 370347, 375260-265, 375219-220
• 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 1/0058 Block-coded modulation
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]

Abstract

Disclosed are a broadcast signal transmitting method. The method according to an embodiment of the present invention includes processing with input streams to output transmission units, wherein the transmission units carry broadcast data which carries a service or a service component, encoding the transmission units, symbol-mapping the encoded transmission units, MIMO encoding the symbol-mapped transmission units, time-interleaving the MIMO-encoded transmission units, building signal frames including the time-interleaved transmission units, modulating the built signal frames by Orthogonal Frequency Division Multiplexing, OFDM scheme, and transmitting the modulated signal frames. Herein the signal frames include a fixed mode of signal frame and a mobile mode of signal frame. Herein a signal frame in the transmitted signal frames includes a preamble part, and the preamble part includes physical signaling data for the transmission units, and wherein the physical signaling data include information on a pilot mode for the signal frame.

Claims

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

processing with input streams to output transmission units, wherein the transmission units carry broadcast data which carries a service or a service component;

encoding the transmission units;

symbol-mapping the encoded transmission units;

Multi Input Multi Output (MIMO) encoding the symbol-mapped transmission units;

time-interleaving the MIMO-encoded transmission units;

building signal frames including the time-interleaved transmission units;

modulating the built signal frames by Orthogonal Frequency Division Multiplexing (OFDM) scheme; and

transmitting the modulated signal frames,

wherein a signal frame among signal frames includes a preamble part, the preamble part includes physical signaling data for the transmission units, and

wherein the signal frame further includes mapping information between IP packets and the transmission units for transmitting at least one service component, and compression information of the IP packets when the input streams are the IP packets.

2. The method of claim 1, wherein the physical signaling data include information indicating a type of a payload carried by a transmission unit.

3. The method of claim 1, wherein the preamble part includes scrambled sequences for signaling information when an emergency event occurs.

4. The method of claim 3, wherein the preamble part provides an indicator to indicate when a receiver should decide whether to wake up.

5. The method of claim 4, wherein the physical signaling data include information indicating whether EAS data is provided in the signal frame.

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

receiving signal frames via broadcast signals,

wherein each signal frame includes a preamble part and transmission units,

wherein the preamble part includes physical signaling data for the transmission units, and

wherein the transmission units carry broadcast data which carries a service or a service component, and

demodulating the signal frames by Orthogonal Frequency Division Multiplexing (OFDM) scheme;

parsing the signal frames;

time-de-interleaving the transmission units in the signal frames;

MIMO decoding the time-de-interleaved transmission units in the signal frames;

symbol de-mapping the MIMO decoded transmission units;

decoding the de-mapped transmission units for forward error correction; and

processing with the decoded transmission units to data streams,

wherein the signal frame further includes mapping information between IP packets and the transmission units for transmitting at least one service component, and compression information of the IP packets when the input streams are the IP packets.

7. The method of claim 6, wherein the physical signaling data include information indicating a type of a payload carried by a transmission unit.

8. The method of claim 6, wherein the preamble part includes scrambled sequences for signaling information when an emergency event occurs.

9. The method of claim 8, wherein the preamble part provides an indicator to indicate when a receiver should decide whether to wake up.

10. The method of claim 9, wherein the physical signaling data include information indicating whether EAS data is provided in the signal frame.