Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
  • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
  • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
  • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
  • H04H20/02—Arrangements for relaying broadcast information
  • H04H20/06—Arrangements for relaying broadcast information among broadcast stations
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
  • H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L27/00—Modulated-carrier systems
  • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
  • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
  • H04L27/3488—Multiresolution systems
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
  • H04N21/21—Server components or server architectures
  • H04N21/222—Secondary servers, e.g. proxy server, cable television Head-end
  • H04N21/2221—Secondary servers, e.g. proxy server, cable television Head-end being a cable television head-end
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
  • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
  • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
  • H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
  • H04N21/61—Network physical structure; Signal processing
  • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
  • H04N21/6112—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving terrestrial transmission, e.g. DVB-T
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
  • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
  • H04H20/61—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H2201/00—Aspects of broadcast communication
  • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
  • H04H2201/11—Aspects of broadcast communication characterised by the type of broadcast system digital multimedia broadcasting [DMB]

Definitions

• the present invention relates to a method and device for providing a local broadcasting service. Particularly, the present invention relates to a method and device for providing a local broadcasting service based on advanced terrestrial digital multimedia broadcasting (AT-DMB).
• AT-DMB advanced terrestrial digital multimedia broadcasting
• the terrestrial digital multimedia broadcasting represents a broadcasting system that is generated by adding a multimedia broadcasting service including a video service to the Eureka 147-based digital audio broadcasting (DAB) system.
• the advanced terrestrial digital multimedia broadcasting represents a broadcasting system that is generated by doubling transmission data capacity by adding a new hierarchical modulation method based on the T-DMB.
• the AT-DMB uses the same frequency bandwidth as the existing T-DMB, increases the transmission capacity by up to twice to provide a greater number of services, and provides the standard definition (SD) level video service that is four times better than the T-DMB image quality.
• SD standard definition
• the present invention has been made in an effort to provide a method and device that are compatible with the existing T-DMB for providing a new local broadcasting service by using the AT-DMB.
• An exemplary embodiment of the present invention provides a method for providing a local broadcasting service in a local broadcasting system that includes: receiving a first main broadcasting signal from a terrestrial digital multimedia broadcasting system; converting the first main broadcasting signal into a second main broadcasting signal for local broadcasting; generating a second local broadcasting signal by encoding the first local broadcasting signal to be broadcast; and performing hierarchical modulation on the second main broadcasting signal and the second local broadcasting signal, and transmitting the signals.
• Another exemplary embodiment of the present invention provides a device for providing a local broadcasting service in a local broadcasting system including: a signal converter for converting a first main broadcasting signal that is appropriate for long distance transmission of greater than a reference distance into a second main broadcasting signal that is appropriate for local distance transmission of less than a reference distance; a local signal encoder for generating a second local broadcasting signal by encoding a first local broadcasting signal to be broadcast; a local signal inserter for generating a third main broadcasting signal by inserting information for notifying existence of the local broadcasting signal into the second main broadcasting signal; and a hierarchical modulator for generating a fourth broadcasting signal by hierarchically modulating the second local broadcasting signal and the third main broadcasting signal, and transmitting the fourth broadcasting signal.
• new local broadcasting services can be provided while the existing T-DMB broadcasting service is provided by using the T-DMB and AT-DMB broadcasting system.
• a device for providing the local broadcasting service is used as a T-DMB relay system to improve the broadcasting quality such as solving the problem of the blanket area, and simultaneously, the AT-DMB system is used to provide a local broadcasting service in the same frequency bandwidth and thereby provide convenience to the local user.
• FIG. 1 shows an example of an environment for providing a local broadcasting service using the T-DMB and AT-DMB network according to an exemplary embodiment of the present invention.
• FIG. 2 shows a hierarchical structure of an ensemble transport interface according to an exemplary embodiment of the present invention.
• FIG. 3 is a block diagram for showing a transmitting device of a local broadcasting system of FIG. 1.
• FIG. 4 is a flowchart for providing a local broadcasting service according to an exemplary embodiment of the present invention.
• a mobile station may indicate a terminal, a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), user equipment (UE), and an access terminal (AT), and it may include entire or partial functions of the terminal, the mobile terminal, the subscriber station, the portable subscriber station, the user equipment, and the access terminal.
• a base station may indicate an access point (AP), a radio access station (RAS), a nodeB (Node-B), an evolved Node-B (eNB), a base transceiver station (BTS), and a mobile multihop relay (MMR)-BS, and it may include entire or partial functions of the access point, the radio access station, the nodeB, the evolved Node-B, the base transceiver station, and the mobile multihop relay-BS.
• AP access point
• RAS radio access station
• Node-B nodeB
• eNB evolved Node-B
• BTS base transceiver station
• MMR mobile multihop relay
• FIG. 1 shows an example of an environment for providing a local broadcasting service using the T-DMB and AT-DMB network according to an exemplary embodiment of the present invention.
• the environment for providing a local broadcasting service includes a T-DMB broadcasting system 10, a T-DMB main transmitter 20, a local broadcasting system 30, and a local transmitter 40.
• the T-DMB broadcasting system 10 transmits T-DMB broadcasting signals that are generated by combining a plurality of broadcasting programs through a channel.
• the T-DMB broadcasting system 10 configures various broadcasting programs that are services into a single ensemble by using an ensemble multiplexer (not shown), generates signals according to the ensemble transport interface (ETI) standard, and transmits them as T-DMB broadcasting signals.
• the T-DMB broadcasting system 10 transmits the T-DMB broadcasting signals to the T-DMB main transmitter 20 and the local broadcasting system 30 through an optical network or a microwave network.
• the T-DMB main transmitter 20 transmits the T-DMB broadcasting signals to a service area that is wider than the basic service area with great transmission power.
• the local broadcasting system 30 inserts local broadcasting signals into the T-DMB broadcasting signals that are received through the optical network or the microwave network to generate AT-DMB broadcasting signals, and transmits the AT-DMB broadcasting signals to the local transmitter 40.
• the local transmitter 40 transmits the AT-DMB broadcasting signals to a service area that is narrower than the basic service area with less transmission power.
• FIG. 2 shows a hierarchical structure of an ensemble transport interface according to an exemplary embodiment of the present invention.
• the ensemble transport interface represents a basic interface for the DMB network.
• the hierarchical structure of the ETI is defined to include a logical interface (LI) layer, a network independent (NI) layer, and a network adaptation (NA) layer.
• LI logical interface
• NI network independent
• NA network adaptation
• the LI layer represents a basic logical structure to define basic information for generating the ensemble.
• the NI layer represents a simple physical interface layer for mapping the LI, and includes a basic interface for the ETI related equipment.
• the NA layer represents a physical interface layer in the error protected format to be used in the network environment with an error generation probability compared to the NI layer, and is mapped on the LI layer.
• the ETI includes various types of interfaces including the ETI(NI, G.703), the ETI(NI, V.11), and the ETI(NA, G.704) according to the used interface signal types, and the ETI(NI, G.703) is used as the main interface among the ensemble transmitting equipment and is a standard input interface of the COFDM modulator.
• a transmitting device of the local broadcasting system 30 will now be described with reference to FIG. 3.
• FIG. 3 is a block diagram for showing a transmitting device of a local broadcasting system of FIG. 1.
• the transmitting device 300 of the local broadcasting system 30 includes a signal converter 310, a local signal encoder 320, a local signal inserter 330, a hierarchical modulator 340, and a transmitter 350.
• the transmitting device 300 receives the first main broadcasting signal ETI(NA)_M from the T-DMB broadcasting system 10.
• the first main broadcasting signal ETI(NA)_M represents a T-DMB main broadcasting signal that is appropriate for long-distance transmission of greater than the reference distance.
• the signal converter 310 converts the second main broadcasting signals ETI(NI)_M that are received through the optical network or the microwave network into baseband signals.
• the signal converter 310 converts the first main broadcasting signal ETI(NA)_M into the second main broadcasting signal ETI(NI)_M that is appropriate for short-distance transmission that is less than the reference distance to satisfy the T-DMB standard, and transmits the second main broadcasting signal ETI(NI)_M to the local signal encoder 320.
• the local signal encoder 320 encodes source signals of first local broadcasting signals including the received video, audio, and data, and provides a local broadcasting service.
• the local signal encoder 320 encodes the first local broadcasting signals to generate second local broadcasting signals including the ETI(NI)_L defined by the T-DMB standard and individual definition signals through the service transport interface STI or the Ethernet.
• the STI represents an interface between transmission devices for transmitting one program defined by the Eureka-147 DAB standard.
• the local signal encoder 320 transmits the second local broadcasting signal in the ETI(NI)_L to the local signal inserter 330.
• the local signal inserter 330 generates a third main broadcasting signal ETI(NI)_M2 by inserting information for notifying existence of local broadcasting signals into the second main broadcasting signal ETI(NI)_M, and transmits the third main broadcasting signal ETI(NI)_M2 to the hierarchical modulator 340.
• the local signal inserter 330 converts the second local broadcasting signal including the individual definition signals through the STI or the Ethernet into a third local broadcasting signal ETI(NI)_L, and transmits the third local broadcasting signal ETI(NI)_L to the hierarchical modulator 340.
• the second local broadcasting signal is transmitted to the hierarchical modulator 340 when the format of the second local broadcasting signal is the same as the third local broadcasting signal ETI(NI)_L.
• the hierarchical modulator 340 generates a fourth broadcasting signal (AT-DMB broadcasting signal) by performing hierarchical modulation (HM) on the two signals, that is, the third main broadcasting signal ETI(NI)_M2 and the third local broadcasting signal ETI(NI)_L.
• HM hierarchical modulation
• the hierarchical modulator 340 economically uses the frequency bandwidth by performing hierarchical modulation on the third main broadcasting signal ETI(NI)_M2 and the third local broadcasting signal ETI(NI)_L, and generates an AT-DMB broadcasting signal, and uses the AT-DMB broadcasting signal to simultaneously transmit the third main broadcasting signal ETI(NI)_M2 and the third local broadcasting signal ETI(NI)_L, that is, the T-DMB main broadcasting signal and the local broadcasting signal.
• the transmitter 350 transmits the AT-DMB broadcasting signal that is generated by performing hierarchical modulation and inserting the local broadcasting signal into the T-DMB main broadcasting signal to the local transmitter 40.
• FIG. 4 is a flowchart for providing a local broadcasting service according to an exemplary embodiment of the present invention.
• the local broadcasting system 30 providing a local broadcasting service receives the T-DMB main broadcasting signal, that is, the first main broadcasting signal ETI(NA)_M from the T-DMB broadcasting system 10 through the optical network or the microwave network.
• the first main broadcasting signal ETI(NA)_M represents the T-DMB main broadcasting signal that is longer than the reference distance.
• the local broadcasting system 30 converts the first main broadcasting signal ETI(NI)_M that is received through the optical network or the microwave network into a baseband band signal, and converts the first main broadcasting signal ETI(NA)_M into the second main broadcasting signal ETI(NI)_M appropriate for local transmission (S100).
• the local broadcasting system 30 encodes the first local broadcasting signal to generate a second local broadcasting signal S200 defined by the T-DMB standard.
• the local broadcasting system 30 inserts information for notifying existence of the local broadcasting signal into the second main broadcasting signal ETI(NI)_M to generate a third main broadcasting signal ETI(NI)_M2, and converts the encoded second local broadcasting signal into the same format of the ETI(NI)_L to generate a third local broadcasting signal ETI(NI)_L (S300).
• the second local broadcasting signal is not converted when the received second local broadcasting signal has the same format as the ETI(NI)_L.
• the local broadcasting system 30 performs hierarchical modulation on the two generated signals, that is, the third main broadcasting signal ETI(NI)_M2 and the third local broadcasting signal ETI(NI)_L, to generate a fourth broadcasting signal (AT-DMB broadcasting signal) (S400).
• the local broadcasting system 30 inserts the third local broadcasting signal ETI(NI)_L into the third main broadcasting signal ETI(NI)_M2 to generate a fourth broadcasting signal (AT-DMB broadcasting signal). That is, the local broadcasting system 30 inserts the third local broadcasting signal ETI(NI)_L into the third main broadcasting signal ETI(NI)_M2 to generate a fourth broadcasting signal (AT-DMB broadcasting signal) in order to simultaneously transmit the local broadcasting signal and the T-DMB main broadcasting signal.
• the local broadcasting system 30 transmits the fourth broadcasting signal (AT-DMB broadcasting signal) to the local transmitter 40 (S500).
• the method for providing a local broadcasting service provides a local broadcasting service in a specific area to provide convenience to the user while providing compatibility with the T-DMB broadcasting.
• the above-described embodiments can be realized through a program for realizing functions corresponding to the configuration of the embodiments or a recording medium for recording the program in addition to through the above-described device and/or method, which is easily realized by a person skilled in the art.

Landscapes

• Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Multimedia (AREA)
• Computer Networks & Wireless Communication (AREA)
• Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
• Radio Relay Systems (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=41669042

Family Applications (1)

Country Status (3)

Citations (4)

Family Cites Families (3)

• 2008
  • 2008-08-13 KR KR20080079468A patent/KR100964380B1/ko active IP Right Grant
• 2009
  • 2009-04-15 WO PCT/KR2009/001933 patent/WO2010018910A1/en active Application Filing
  • 2009-04-15 EP EP09806772A patent/EP2324629A4/de not_active Ceased

Patent Citations (4)

Non-Patent Citations (3)

Also Published As

Similar Documents

Legal Events