# US 8,787,408 B2 · Method and apparatus for transmitting additional data in digital terrestrial broadcasting system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,787,408 B2 - Document ID: US8787408B2 - Status: Granted - Kind: B2 - Application number: 13/242,685 - Filed: 2011-09-23 - Published: 2012-03-29 - Granted: 2014-07-22 - Earliest claimed: 2010-09-28 - Assignees: Electronics and Telecommunications Research Institute - Applicants: Jae Hyun Seo; Joung Il Yun; Heung Mook Kim; Soo In Lee - Inventors: Jae Hyun Seo; Joung Il Yun; Heung Mook Kim; Soo In Lee - Web page: https://patentgrep.com/patent/US8787408B2 ## CPC - H04N 21/4722: for requesting additional data associated with the content - H04H 20/30: by a single channel - H04H 60/50: of broadcast or relay stations - H04N 21/234327: {by decomposing into layers, e.g. base layer and one or more enhancement layers} - H04N 21/2365: Multiplexing of several video streams - H04N 21/25841: {involving the geographical location of the client (retrieval from the Internet by querying based on geographical locations G06F16/9537; arrangements for identifying locations of receiving stations in broadcast systems H04H60/51; location of the user terminal in data switching networks H04L67/52; services making use of the location of users or terminals in wireless networks H04W4/02; locating users or terminals in wireless networks H04W64/00)} - H04N 21/6112: {involving terrestrial transmission, e.g. DVB-T} - H04H 20/72: of terrestrial networks - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - H04H: BROADCAST COMMUNICATION (multiplex communication H04J; pictorial communication aspects of broadcast systems H04N) ## Abstract A method and an apparatus for transmitting additional data in a digital terrestrial broadcasting system are provided. The apparatus includes: a main signal generating unit channel-coding main data and converting the main data into a main signal; an additional signal generating unit channel-coding additional data and converting the additional data into an additional signal; a mixed signal generating unit generating a mixed signal by coupling the main signal and the additional signal to each other; and a mixed signal transmitting unit modulating the mixed signal and transmitting the modulated mixed signal to a receiver through a transmission antenna, wherein the additional data is additional data requested by a specific user possessing the receiver and the specific user provides information on an additional data transmitter. ## Claims ### Claim 1 An apparatus for transmitting additional data in a digital terrestrial broadcasting system, the apparatus comprising: a main signal generating unit configured for performing channel-coding main data and converting the main data into a main signal; an additional signal generating unit configured for performing channel-coding additional data and converting the additional data into an additional signal; a mixed signal generating unit configured for generating a mixed signal by combining the main signal and the additional signal; and a mixed signal transmitting unit configured for modulating the mixed signal and transmitting the modulated mixed signal to a receiver through a transmission antenna, wherein information on a transmitter of the apparatus for transmitting additional data is additionally transmitted, wherein the additional data is additional data requested by the receiver, and wherein a unique number of the receiver and an identification number of a transmitter transmitting broadcasting to a broadcasting area including a place at which the receiver is positioned are transmitted by the receiver together with the request for the additional data. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the information on a transmitter is an identification number of the apparatus for transmitting additional data. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the information on a transmitter transmitted by the apparatus for transmitting additional data and the identification number of the transmitter transmitted by the receiver coincide with each other. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the additional data is independently transmitted according to the information on a transmitter transmitted by the apparatus for transmitting additional data. ### Claim 5 A method for transmitting additional data in a digital terrestrial broadcasting system, the method comprising: generating a main signal and an additional signal from main data and additional data respectively; generating a mixed signal by combining the main signal and the additional signal; transmitting the generated mixed signal to a receiver through an antenna; and transmitting information on a transmitter of an apparatus for transmitting additional data, wherein the additional data is additional data requested by the receiver, and wherein the receiver transmits a unique number of the receiver and an identification number of a transmitter transmitting broadcasting to a broadcasting area including a place at which the receiver is positioned, together with the request for the additional data. ### Claim 6 (depends on 5) The method of claim 5, wherein the information on a transmitter is an identification number of the apparatus for transmitting additional data. ### Claim 7 (depends on 5) The method of claim 5, wherein the information on a transmitter transmitted by the apparatus for transmitting additional data and the identification number of the transmitter transmitted by the receiver coincide with each other. ### Claim 8 (depends on 5) The method of claim 5, wherein the additional data is independently transmitted according to the information on a transmitter transmitted by the apparatus for transmitting additional data.