APPARATUS FOR TRANSMITTING BROADCAST SIGNALS, APPARATUS FOR RECEIVING BROADCAST SIGNALS, METHOD FOR TRANSMITTING BROADCAST SIGNALS AND METHOD FOR RECEIVING BROADCAST SIGNALS

• US 20180007438A1
• Filed: 09/19/2017
• Published: 01/04/2018
• Est. Priority Date: 06/12/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: OH, Sejin, KWON, Woosuk, HONG, Sungryong, MOON, Kyoungsoo, LEE, Jangwon, KO, Woosuk
• Granted Patent: US 10,448,105 B2
• Time in Patent Office: Days
• CPC Class Codes: H03M 13/1102 Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
• CPC Class Codes: H03M 13/2792 Interleaver wherein interleaving is performed jointly with another technique such as puncturing, multiplexing or routing
• CPC Class Codes: H04H 20/40 Arrangements for broadcast specially adapted for accumulation-type receivers
• CPC Class Codes: H04H 60/07 characterised by processes or methods for the generation
• CPC Class Codes: H04H 60/39 for identifying broadcast space-time use of Electronic Programme Guides H04H60/72
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0075 Transmission of coding parameters to receiver H04L1/0023 takes precedence
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04N 21/2362 Generation or processing of Service Information [SI]
• 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 21/242 Synchronization processes, e.g. processing of PCR [Program Clock References] arrangements for synchronising broadcast or distribution via plural systems in broadcast distribution systems H04H20/18
• CPC Class Codes: H04N 21/26275 for distributing content or additional data in a staggered manner, e.g. repeating movies on different channels in a time-staggered manner in a near video on demand system
• CPC Class Codes: H04N 21/4302 Content synchronisation processes, e.g. decoder synchronisation
• CPC Class Codes: H04N 21/462 Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
• CPC Class Codes: H04N 21/85406 involving a specific file format, e.g. MP4 format
• CPC Class Codes: H04N 5/40 Modulation circuits
• CPC Class Codes: H04N 7/24 Systems for the transmission of television signals using pulse code modulation H04N21/00 takes precedence

Abstract

The present invention provides a method of transmitting broadcast signals. The method includes, formatting input streams into Data Pipe (DP) data, Low-Density Parity-Check (LDPC) encoding the DP data according to a code rate, bit interleaving the LDPC encoded DP data, mapping the hit interleaved DP data onto constellations, building at least one signal frame including the mapped DP data, and modulating data in the built signal frame by an Orthogonal Frequency Division Multiplexing (OFDM) method and transmitting the broadcast signals having the modulated data, wherein the input streams include Audio/Video (A/V) data and service guide data, and wherein the Audio/Video (A/V) data and service guide data are included in first ISO base media file format (ISOBMFF) files.

Claims

1-14. -14. (canceled)

15. A method of receiving broadcast signals, the method including:

receiving the broadcast signals,

wherein the broadcast signals are generated by encapsulating and compressing data into link layer packets, Low-Density Parity-Check (LDPC) encoding the data according to a code rate, bit interleaving the LDPC encoded data, mapping the bit interleaved data, building at least one signal frame including the mapped data, and modulating data in the built at least one signal frame by an Orthogonal Frequency Division Multiplexing (OFDM) method; and

decoding the received broadcast signals;

wherein a link layer packet includes a link layer packet header and a payload containing an input packet,

wherein a packet type of the input packet corresponds to IP(Internet Protocol) packet, or MPEG-2 TS packet,

wherein the input packet is segmented and contained as a part of the input packet in the payload, or the input packet is concatenated with another input packet and contained in the payload,

wherein the link layer packet header has an information field that indicates whether a segmentation or a concatenation is performed,

wherein when the packet type of the input packet corresponds to the IP packet, a header of the IP packet is compressed based on RoHC(Robust Header Compression) of unidirectional model,

wherein the input packet includes Audio/Video (A/V) data, and

wherein the Audio/Video (A/V) data is included in first ISO base media file format (ISOBMFF) files.

16. The method of claim 15,

wherein the input packet further includes service guide data, and non-real time content data which are delivered in advance its use and stored in a receiving device,

wherein the service guide data is further included in the first ISOBMFF files, and

wherein the non-real time content data are included in second ISO base media file format (ISOBMFF) files.

17. The method of claim 16,

wherein the A/V data which are transmitted in a real-time are to be combined with the non-real time content data to present a complete content.

18. The method of claim 17,

wherein the first ISOBMFF files include a first timeline and the second ISOBMFF files include a second timeline, and

wherein the first timeline and the second timeline are used to synchronize the non-real time content with the A/V data.

19. The method of claim 18,

wherein the second ISOBMFF files include a plurality of presentation units.

20. The method of claim 19,

wherein the second timeline specify a clock rate and a start time corresponding to a first presentation unit in the second ISOBMFF files.

21. The method of claim 19,

wherein the each of the presentation units has a presentation time relative to the second timeline.

22. An apparatus for receiving broadcast signals, the apparatus including:

a receiving unit configured to receive the broadcast signals,

wherein the broadcast signals are generated by encapsulating and compressing data into link layer packets, Low-Density Parity-Check (LDPC) encoding the data according to a code rate, bit interleaving the LDPC encoded data, mapping the bit interleaved data, building at least one signal frame including the mapped data, and modulating data in the built at least one signal frame by an Orthogonal Frequency Division Multiplexing (OFDM) method; and

a decoding unit configured to decode the received broadcast signals;

wherein a link layer packet includes a link layer packet header and a payload containing an input packet,

wherein a packet type of the input packet corresponds to IP(Internet Protocol) packet, or MPEG-2 TS packet,

wherein the input packet is segmented and contained as a part of the input packet in the payload, or the input packet is concatenated with another input packet and contained in the payload,

wherein the link layer packet header has an information field that indicates whether a segmentation or a concatenation is performed,

wherein when the packet type of the input packet corresponds to the IP packet, a header of the IP packet is compressed based on RoHC(Robust Header Compression) of unidirectional model,

wherein the input packet includes Audio/Video (A/V) data, and

wherein the Audio/Video (A/V) data is included in first ISO base media file format (ISOBMFF) files.

23. The apparatus of claim 22,

wherein the input packet further includes service guide data, and non-real time content data which are delivered in advance its use and stored in a receiving device,

wherein the service guide data is further included in the first ISOBMFF files, and

wherein the non-real time content data are included in second ISO base media file format (ISOBMFF) files.

24. The apparatus of claim 23,

wherein the A/V data which are transmitted in a real-time are to be combined with the non-real time content data to present a complete content.

25. The apparatus of claim 24,

wherein the first ISOBMFF files include a first timeline and the second ISOBMFF files include a second timeline, and

wherein the first timeline and the second timeline are used to synchronize the non-real time content with the A/V data.

26. The apparatus of claim 25,

wherein the second ISOBMFF files include a plurality of presentation units.

27. The apparatus of claim 26,

wherein the second timeline specify a clock rate and a start time corresponding to a first presentation unit in the second ISOBMFF files.

28. The apparatus of claim 26,

wherein the each of the presentation units has a presentation time relative to the second timeline.

29. A method of transmitting broadcast signals, the method including:

generating the broadcast signals,

wherein the broadcast signals are generated by encapsulating and compressing data into link layer packets, Low-Density Parity-Check (LDPC) encoding the data according to a code rate, bit interleaving the LDPC encoded data, mapping the bit interleaved data, building at least one signal frame including the mapped data, and modulating data in the built at least one signal frame by an Orthogonal Frequency Division Multiplexing (OFDM) method; and

transmitting the generated broadcast signals;

wherein a link layer packet includes a link layer packet header and a payload containing an input packet,

wherein a packet type of the input packet corresponds to IP(Internet Protocol) packet, or MPEG-2 TS packet,

wherein the input packet is segmented and contained as a part of the input packet in the payload, or the input packet is concatenated with another input packet and contained in the payload,

wherein the link layer packet header has an information field that indicates whether a segmentation or a concatenation is performed,

wherein when the packet type of the input packet corresponds to the IP packet, a header of the IP packet is compressed based on RoHC(Robust Header Compression) of unidirectional model,

wherein the input packet includes Audio/Video (A/V) data, and

wherein the Audio/Video (A/V) data is included in first ISO base media file format (ISOBMFF) files.

30. An apparatus for transmitting broadcast signals, the apparatus including:

a generating unit configured to generate the broadcast signals,

wherein the broadcast signals are generated by encapsulating and compressing data into link layer packets, Low-Density Parity-Check (LDPC) encoding the data according to a code rate, bit interleaving the LDPC encoded data, mapping the bit interleaved data, building at least one signal frame including the mapped data, and modulating data in the built at least one signal frame by an Orthogonal Frequency Division Multiplexing (OFDM) method; and

a transmitting unit configured to transmit the generated broadcast signals;

wherein a link layer packet includes a link layer packet header and a payload containing an input packet,

wherein a packet type of the input packet corresponds to IP(Internet Protocol) packet, or MPEG-2 TS packet,

wherein the input packet is segmented and contained as a part of the input packet in the payload, or the input packet is concatenated with another input packet and contained in the payload,

wherein the link layer packet header has an information field that indicates whether a segmentation or a concatenation is performed,

wherein when the packet type of the input packet corresponds to the IP packet, a header of the IP packet is compressed based on RoHC(Robust Header Compression) of unidirectional model,

wherein the input packet includes Audio/Video (A/V) data, and

wherein the Audio/Video (A/V) data is included in first ISO base media file format (ISOBMFF) files.