# US 10,454,885 B2 · Apparatus for transmitting broadcast signal, apparatus for receiving broadcast signal, method for transmitting broadcast signal and method for receiving broadcast signal

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- Number: US 10,454,885 B2
- Document ID: US10454885B2
- Status: Granted
- Kind: B2
- Application number: 16/050,395
- Filed: 2018-07-31
- Published: 2018-12-20
- Granted: 2019-10-22
- Earliest claimed: 2014-12-10
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Woosuk Kwon; Minsung Kwak; Kyoungsoo Moon
- Web page: https://patentgrep.com/patent/US10454885B2

## CPC

- H04L 45/745: Address table lookup; Address filtering
- H04L 41/50: Network service management, e.g. ensuring proper service fulfilment according to agreements
- H04L 61/2592: using tunnelling or encapsulation
- H04L 69/22: Parsing or analysis of headers
- H04N 21/2343: 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)}
- H04N 21/235: Processing of additional data, e.g. scrambling of additional data or processing content descriptors
- H04N 21/2362: Generation or processing of Service Information [SI]
- H04L 41/0803: Configuration setting
- H04L 61/5007: Internet protocol [IP] addresses
- H04L 69/16: Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L 69/324: in the data link layer [OSI layer 2], e.g. HDLC
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A method for transmitting a broadcast signal is discussed. The method includes generating transport packets of a transport stream having service data for a broadcast service, compressing headers of the transport packets and extracting context information from the transport packets according to a processing mode, encapsulating the transport packets into link layer packets for data, generating signaling information including the context information and information indicating the processing mode, encapsulating the signaling information into link layer packets for signaling, and transmitting the broadcast signal including the link layer packets for data and the link layer packets for signaling.

## Claims

### Claim 1

A method for transmitting a broadcast signal in a digital transmitter, the method comprising:
compressing at least one header of at least one Internet protocol (IP) packet, wherein the at least one IP packet includes at least one initialization and refresh (IR) packet, at least one IR-dynamic (IR-DYN) packet and at least one compressed packet;
extracting context information based on a processing mode,
wherein in response to detecting that the processing mode is a first mode, the extracting the context information comprises extracting first static context information from the at least one IR packet and converting the at least one IR packet to the at least one IR-DYN packet, and
wherein in response to detecting that the processing mode is a second mode being different from the first mode, the extracting the context information comprises extracting second static context information and first dynamic context information from the at least one IR packet and converting the at least one IR packet to the at least one compressed packet;
extracting second dynamic context information from the at least one IR-DYN packet and converting the at least one IR-DYN packet to the at least one compressed packet;
encapsulating the at least one IP packet into at least one link layer packet; and
transmitting the broadcast signal including the at least one link layer packet.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the first static context information is different from the second static context information or same as the second static context information, and
wherein the first dynamic context information is different from the second dynamic context information or same as the second dynamic context information.

### Claim 3

A digital transmitter for transmitting a broadcast signal, the digital transmitter comprising:
a link layer processor configured to:
compress at least one header of at least one Internet protocol (IP) and extract context information based on a processing mode, wherein the at least one IP packet includes at least one initialization refresh (IR) packet, at least one IR-dynamic (IR-DYN) packet and at least one compressed packet,
wherein in response to detecting that the processing mode is a first mode, the link layer processor is further configured to extract first static context information from the at least one IR packet and convert the at least one IR packet to the at least one IR-DYN packet, and
wherein in response to detecting that the processing mode is a second mode being different from the first mode, the link layer processor is further configured to extract second static context information and first dynamic context information from the at least one IR packet and convert the at least one IR packet to the at least one compressed packet, and
extract second dynamic context information from the at least one IR-DYN packet and convert the at least one IR-DYN packet to the at least one compressed packet,
wherein the link layer processor is further configured to encapsulate the at least one IP packet into at least one link layer packet; and
a transmitter configured to transmit the broadcast signal including the at least one link layer packet.

### Claim 4 (depends on 3)

The digital transmitter according to claim 3, wherein the first static context information is different from the second static context information or same as the second static context information, and
wherein the first dynamic context information is different from the second dynamic context information or same as the second dynamic context information.