Apparatus for transmitting broadcast signal, apparatus for receiving broadcast signal, method for transmitting broadcast signal and method for receiving broadcast signal

Patent metadata

Field	Value
Publication number	US-10063673-B2
Application number	US-201514916506-A
Country	US
Kind code	B2
Filing date	Dec 2, 2015
Priority date	Dec 5, 2014
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

Methods and apparatuses for transmitting and receiving a broadcast signal are disclosed. The broadcast signal transmission method includes generating a plurality of input packets including broadcast data, generating at least one link layer packet using the generated input packets, generating a broadcast signal including the generated at least one link layer packet, and transmitting the generated broadcast signal.

First claim

The invention claimed is:

1. A broadcast signal transmission method comprising:
generating, by a broadcast transmitter, a plurality of compressed internet protocol (IP) packets comprising broadcast data;
generating, by the broadcast transmitter, a first link layer packet including a t ad including the generated plurality of compressed IP packets, the first link layer packet including a first header and a second header, the first header including information indicating whether the second header exists and information indicating least significant bits (LSBs) of a length of the payload, the second header including information indicating most significant bits (MSBs) of the length of the payload;
generating, by the broadcast transmitter, a second link layer packet including a header and a payload including signaling information for header compression of the compressed IP packets,
wherein the signaling information includes context identification information indicating context id of a compressed IP stream including the compressed IP packets, context profile information indicating a range of protocols used to compress an IP stream including IP packets and static information for initializing a process of decompressing the compressed IP stream;
transmitting, by the broadcast transmitter, the generated first link layer packet; and
transmitting, by the broadcast transmitter, the generated second link layer packet separately from the first link layer packet through a specific physical data path.

2. The broadcast signal transmission method according to claim 1 , wherein the header of the second link layer packet includes signaling class information indicating a type of the signaling information contained in the payload.

3. The broadcast signal transmission method according to claim 1 , wherein least significant bits (LSBs) of a length of the payload is concatenated with the information indicating most significant bits (MSBs) of a length of the payload.

4. The broadcast signal transmission method according to claim 1 , wherein the second link layer packet further includes the first header, the first header of the first link layer packet or the second link layer packet including packet type information indicating a type of input data before encapsulation into the first link layer packet or the second link layer packet.

5. The broadcast signal transmission method according to claim 1 , wherein the signaling information further includes maximum context identification information indicating a maximum value of context id to be used and dynamic information for initializing a process of decompressing the compressed IP stream.

6. The broadcast signal transmission method according to claim 4 , wherein the first header of the first link layer packet or the second link layer packet further includes configuration information indicating a configuration of the payload of the first link layer packet or the second link layer packet and segmentation concatenation information indicating whether the payload of the first link layer packet or the second link layer packet carries a segment of an input packet or more than one complete input packet.

7. The broadcast signal transmission method according to claim 1 , wherein the second header further comprises information indicating a number of the plurality of the compressed IP packets contained in the payload.

8. A broadcast signal reception method comprising:
receiving, by a broadcast receiver, a broadcast signal comprising first link layer packet and second link layer packet, the first link layer packet including a payload including a plurality of compressed internet protocol (IP) packets;
extracting, by the broadcast receiver, the second link layer packet from a specific physical data path which is separate from a physical data path carrying the first link layer packet, the second link layer packet including a header and a payload including signaling information for header compression of the compressed IP packets,
wherein the signaling information includes context identification information indicating context id of a compressed IP stream including the compressed IP packets, context profile information indicating a range of protocols used to compress an IP stream including IP packets and static information for initializing a process of decompressing the compressed IP stream;
extracting, by the broadcast receiver, the signaling information for the extracted second link layer packet;
extracting, by the broadcast receiver, the first link layer packet from the physical data path; and
extracting, by the broadcast receiver, the plurality of compressed IP packets from the extracted first link layer packet, the first link layer packet including a first header and a second header, the first header including information indicating whether the second header exists and information indicating least significant bits (LSBs) of a length of the payload, the second header including information indicating most significant bits (MSBs) of the length of the payload.

9. The broadcast signal reception method according to claim 8 , wherein the header of the second link layer packet includes signaling class information indicating a type of the signaling information contained in the payload.

10. The broadcast signal reception method according to claim 8 , wherein least significant bits (LSBs) of a length of the payload is concatenated with the information indicating most significant bits (MSBs) of a length of the payload.

11. The broadcast signal reception method according to claim 8 , wherein the second link layer packet further includes the first header, the first header of the first link layer packet or the second link layer packet including packet type information indicating a type of input data before encapsulation into the first link layer packet or the second link layer packet.

12. The broadcast signal reception method according to claim 8 , wherein the signaling information further includes maximum context identification information indicating a maximum value of context id to be used and dynamic information for initializing a process of decompressing the compressed IP stream.

13. The broadcast signal reception method according to claim 8 , wherein the second header further comprises information indicating a number of the plurality of the compressed IP packets contained in the payload.

14. A broadcast signal transmission apparatus comprising:
a first packet generation processor configured to generate a plurality of compressed internet protocol (IP) packets comprising broadcast data;
a second packet generation processor configured to generate a first link layer packet including a payload including the generated plurality of compressed IP packets, the first link layer packet including a first header and a second header, the first header including information indicating whether the second header exists and information indicating least significant bits (LSBs) of a length of the payload, the second header including information indicating most significant bits (MSBs) of the length of the payload;
a third packet generation processor configured to generate a second link layer packet including a header and a payload including signaling information for header compression of the compressed IP packets,
wherein the signaling information includes context identification information indicating context id of a compressed IP stream including the compressed IP packets, context profile information indicating a range of protocols used to compress an IP stream including IP packets and static information for initializing a process of decompressing the compressed IP

Assignees

• Lg Electronics Inc

Inventors

• Kwon Woosuk
• Moon Kyoungsoo
• Kwak Minsung

Classifications

• H04N21/2343

  involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements {(video transcoding H04N19/40; media packet handling at the source H04L65/762)} · CPC title

• H04L69/22

  Parsing or analysis of headers · CPC title

• H04N21/236 Primary

  Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream {(multiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00)} · CPC title

• H04N21/434

  Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream {(demultiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00)} · CPC title

• H04L69/324 Primary

  in the data link layer [OSI layer 2], e.g. HDLC · CPC title