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WO2007043745A1 - Dispositif de gestion d'un service de donnees/procede d'extension de bande de frequence et serveur de base de donnees dmb utilisant lesdits dispositif et procede et systeme recepteur dmb pour service de donnees a bande large - Google Patents

Dispositif de gestion d'un service de donnees/procede d'extension de bande de frequence et serveur de base de donnees dmb utilisant lesdits dispositif et procede et systeme recepteur dmb pour service de donnees a bande large Download PDF

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Publication number
WO2007043745A1
WO2007043745A1 PCT/KR2006/002568 KR2006002568W WO2007043745A1 WO 2007043745 A1 WO2007043745 A1 WO 2007043745A1 KR 2006002568 W KR2006002568 W KR 2006002568W WO 2007043745 A1 WO2007043745 A1 WO 2007043745A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
service
band
basic
dmb
Prior art date
Application number
PCT/KR2006/002568
Other languages
English (en)
Inventor
Sam-Mo Cho
Young-Kwon Hahm
Chung-Hyun Ahn
Soo-In Lee
Original Assignee
Electronics And Telecommunications Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electronics And Telecommunications Research Institute filed Critical Electronics And Telecommunications Research Institute
Priority to EP06769135A priority Critical patent/EP1946547A4/fr
Publication of WO2007043745A1 publication Critical patent/WO2007043745A1/fr

Links

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
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/42—Arrangements for resource management
    • 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
    • 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
    • H04N21/2385—Channel allocation; Bandwidth allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/93—Arrangements characterised by the broadcast information itself which locates resources of other pieces of information, e.g. URL [Uniform Resource Locator]
    • 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 data service managing apparatus and method for frequency band extension, a Digital Multimedia Broadcasting (DMB) data server using the same, and a DMB receiving system for a broadband data service. More particularly, the invention is directed to a data service managing apparatus and method for a frequency band extension, a DMB data server using the same and a DMB receiving system for a broadband data service, which enable a high efficiency and large capacity multimedia data service by providing an additional band while keeping compatibility with the existing DMB transmitting and receiving systems that cannot support a large capacity data service due to a limited frequency band.
  • DMB Digital Multimedia Broadcasting
  • a terrestrial DMB system is designed to transmit/receive moving image relatively strong against errors by using the transmission infrastructure of Digital Audio Broadcasting (DAB) system.
  • DAB Digital Audio Broadcasting
  • the system is known suitable for services that mainly target vehicles and wireles receivers such as mobile phones since it enables a stable reception of moving image and data even during movement.
  • the terrestrial DMB system is designed for audio-centered service at the beginning, its bandwidth is limited to 1.5 Mbps to have a low payload transmission capability of about 1 Mbps.
  • the conventional system cannot provide a large capacity data service such as video transmission of Standard Definition (SD) level and its modulation scheme is also inefficient owing to use of standard developed at the beginning of the 1990s, compared to the current modulation scheme.
  • SD Standard Definition
  • a data service managing apparatus for a frequency band extension for accommodating a broadband Digital Multimedia Broadcasting (DMB) data service by using a basic DMB transmission system having a predetermined basic frequency band and an additional DMB transmission system having an additional frequency band other than the basic frequency band, including: a band confirmation unit for confirming a frequency band used for each data service; and a data distributor for distributing service data to a system capable of processing the service data among the basic DMB transmission system and the additional DMB transmission system based on the frequency band confirmed by the band confirmation unit.
  • DMB Digital Multimedia Broadcasting
  • DMB data server for a frequency band extension, including: a data service managing unit for confirming a frequency band used for each data service, and bypassing service data to be processed in a basic band to a basic DMB transmission system and transmitting service data to be processed in an additional band to a data processing processor; and the data processor for processing the data provided from the data service managing unit based on a DMB standard to generate a DMB broadcasting signal.
  • DMB receiving system for a broadband data service, including: a Radio Frequency (RF) processor for receiving and converting an RF broadcasting signal into an Intermediate Frequency (IF) signal; a baseband processor for converting the IF signal obtained in the RF processor into a baseband signal; a data decoder for decoding the baseband signal outputted from the baseband processor, and combining data that is divided and serviced in accordance with a frequency band at a transmitting end; and an application service decoder for providing an application service by using the data outputted from the data decoder.
  • RF Radio Frequency
  • IF Intermediate Frequency
  • a data service managing method for a frequency band extension for accommodating a broadband DMB data service by using a basic DMB transmission system having a predetermined basic frequency band and an additional DMB transmission system having an additional frequency band other than the basic frequency band, including the steps of: a) confirming a frequency band used for each data service; b) if the data service is a service using the basic band, distributing service data to the basic DMB transmission system; c) if the data service is a service using the additional band, distributing service data to the additional DMB transmission system; and d) if the data service is a service using both basic and additional bands, distributing the service data to a system capable of processing the service data among the basic DMB transmission system and the additional DMB transmission system based upon a transmission rate of the service data.
  • the present invention as described above and below has an advantage in that it extends a transmission bandwidth of a terrestrial DMB system and also applies a high efficient modulation scheme under the bandwidth so extended while keeping compatibility with the existing terrestrial DAB/DMB systems, thereby accommodating a high efficient and large capacity data service required in the future.
  • the invention can accommodate a future large-capacity multimedia data service by extending a transmission bandwidth to 3 MHz or 6 MHz that is TV channel bandwidth and then sending data therethrough, while supporting a DMB system and its receiver using an existing 1.5 MHz bandwidth.
  • FIG. 1 is a diagram describing the concept of a frequency band extension method in a terrestrial DMB in accordance with the present invention
  • FIGs. 2 and 3 are diagrams describing patterns using a basic band and an additional band in case of extending a frequency band in accordance with the present invention
  • FIG. 4 is a block diagram illustrating a configuration of a terrestrial DMB transmission system for a frequency band extension in accordance with an embodiment of the invention
  • FIG. 5 is a detailed block diagram showing a configuration of the data service managing unit for the frequency band extension in accordance with an embodiment of the invention
  • Fig. 6 is a block diagram illustrating a configuration of a terrestrial DMB transmission system for a frequency band extension in accordance with another embodiment of the invention
  • Fig. 7 is a block diagram illustrating a configuration of a DMB data server for a frequency band extension in accordance with an embodiment of the invention
  • Fig. 8 is a block diagram illustrating a configuration of a terrestrial DMB receiving system for a broadband data service in accordance with an embodiment of the invention
  • Fig. 9 is a block diagram illustrating a configuration of a terrestrial DMB receiving system for a broadband data service in accordance with another embodiment of the invention.
  • Fig. 1 is a diagram describing the concept of a frequency band extension method in a terrestrial DMB in accordance with the present invention.
  • Fig. 1 As shown in Fig. 1, a frequency band or basic band of the terrestrial DMB to which
  • Figs. 2 and 3 are diagrams showing patterns that use the basic band and the additional band where the frequency band is extended in accordance with the invention.
  • the terrestrial DMB receiving system will be simply called terminal in the following description referring to Figs. 2 and 3.
  • Fig. 2 shows a pattern that makes use of only any one of the basic band and the additional band for each service or terminal
  • Fig. 3 presents a pattern that the same service or terminal utilizes both of the basic band and the additional band.
  • a service A using only the basic band is receivable by any of an existing terminal A that supports the basic band merely and a new terminal B that supports all of the basic band and the additional band, whereas a service B using a new band or the additional band is receivable by the new terminal B.
  • FIG. 3 an explanation is made for how a new terminal processes a service C received over all of the basic band and the new additional band.
  • multiplexing followed by transmission is performed to employ the basic band and the additional band together based on required capacity of data service or efficiency of service. For example, if a service cannot be processed with the entire capacity of the basic band or residual capacity in the basic band, it is checked whether the new additional band can accommodate the remaining service capacity, and if yes, data is divided and serviced to be used in the two bands.
  • Fig. 4 is a block diagram illustrating a configuration of a terrestrial DMB transmission system for a frequency band extension in accordance with an embodiment of the invention. As illustrated, the system includes a data service managing unit 41, a basic DMB transmission system 42, and an additional DMB transmission system 43.
  • the basic DMB transmission system 42 includes a basic data server 421 and a basic transmission system 422 to process and transmit data based on the DMB standard within a basic band, e.g., 1.5 MHz.
  • the additional DMB transmission system 43 includes an additional data server 431 and an additional transmission system 432 to process and transmit data under the DMB standard within an additional band.
  • the additional band used herein is means an upper or lower band adjacent to the basic band. When the additional band has a bandwidth of 1.464 MHz when the entire bandwidth is 3 MHz. When the entire bandwidth is 6MHz, the additional band has a bandwidth of 4.464 MHz. In order to reduce interference between the basic band and the additional band, there may be a guard band of a proper size therebetween.
  • the data service managing unit 41 is positioned in the front end of the basic data server 421 and the additional data server 431 and determines whether to transmit a data service will to the basic data server 421 or to the additional data server 431. In case of specific large capacity service, data is divided and then sent to both systems.
  • the additional transmission system 432 may increase or decrease only the number of subcarriers depending on the size of band while using the same Differential Quadrature Phase Shift Keying-Coded Orthogonal Frequency Division Multiplexing (DQPSK-COFDM) as adopted by the basic transmission system 422. Otherwise, the additional transmission system 432 may employ another modulation scheme with a higher efficiency than that of the DQPSK while using the same COFDM as adopted by the basic transmission system 422. Alternatively, the additional transmission system 432 may employ other high-efficient modulation schemes or Code Division Multiplexing (CDM), instead of the DQPSK and COFDM adopted by the basic transmission system 422. Details will be given below with reference to Fig. 5.
  • CDM Code Division Multiplexing
  • FIG. 5 is a detailed block diagram showing a configuration of the data service managing unit for the frequency band extension in accordance with an embodiment of the invention in which a data service managing method conducted in the data service managing unit will be also described together.
  • the data service managing unit 41 serves to accommodate broadband data service and it comprises a band confirmation unit 51 and a data distributor 52, which is shown in Fig. 5.
  • the band confirmation unit 51 confirms a frequency band used for each data service.
  • the band confirmation unit 51 functions to confirm whether a data service uses the basic band, the additional band, or both of them according to the data transmission rate of the data service.
  • the data distributor 52 distributes the data associated with the data service to a corresponding system between the basic DMB transmission system 42 and the additional DMB transmission system 43 based on the confirmation result obtained by the band confirmation unit 51.
  • the data distributor 52 delivers the service data or data to be sent via the
  • DMB transmission system to the basic DMB transmission system 42 for the data service using the basic band, and to the additional DMB transmission system 43 for the data service using the additional band.
  • the data distributor 52 distributes the service data to the DMB transmission system of frequency band that can process the service data at the given transmission rate between the basic DMB transmission system 42 and the additional DMB transmission system 43 for the data service using both of the basic band and the additional band.
  • the data distributor 52 adds identification information and sequence information to data distributed to the corresponding DMB transmission system for the data service using all of the bands and distributes the data to a corresponding DMB transmission system.
  • the identification information indicates the data are for a service using both basic and additional bands, and the sequence information is used when the transmitted data are combined at the receiving part.
  • the basic data server 421 and the additional data server 431 insert the identification information and sequence information into Fast Information Channel (FIC) upon generation of a DMB broadcasting signal according to the DMB standard.
  • FIC Fast Information Channel
  • FIG. 6 is a block diagram illustrating a configuration of a terrestrial DMB transmission system for a frequency band extension in accordance with another embodiment of the invention.
  • Fig. 6 shows that an additional data server 61, i.e., DMB data server, is in charge of service managing function, without having the separate data service managing unit.
  • the additional data server 61 bypasses data to be sent via the existing systems to the basic data server 621, and processes data to be sent via an additional transmission system 63 according to the DMB standard and then sends the same to the system 63.
  • the additional data server 61 also divides the data and then sends divided data via the two systems.
  • FIG. 7 is a block diagram illustrating a configuration of a DMB data server for a frequency band extension in accordance with an embodiment of the invention.
  • a DMB data server or additional data server 61 shown in Figs. 6 and 7 comprises a data service managing unit 71 for performing a service managing function by the data service managing unit 41 and a data processor 72 for doing the same function as the additional data server 431.
  • the data service managing unit 71 which serves to accommodate a broadband data service, is constituted by a band confirmation unit 711 and a data distributor 712, as shown in Fig. 7.
  • the data confirmation unit 711 functions to confirm a frequency band used for each data service, which conducts the same function as the band confirmation unit 51 depicted in Fig. 5.
  • the data distributor 712 delivers data related to a data service to the basic DMB transmission system 42 or to the data processor 72 for processing in the unit 712 itself, based on the confirmation result done by the band confirmation unit 711.
  • the data distributor 712 bypasses service data to the basic DMB transmission system 42 for service using the basic band; and delivers service data to the data processing unit 72 for processing in the distributor 712 itself for service using the additional band.
  • the data distributor 712 distributes service data to the data processor 72 or the basic DMB transmission system 42 depending on its frequency band for service using both basic band and additional band.
  • Fig. 8 is a block diagram illustrating a configuration of a terrestrial DMB receiving system for a broadband data service in accordance with an embodiment of the invention.
  • a receiving system also needs a special decoding scheme for the above purpose. If the receiving system judges that a specific service uses both of the basic band and the additional band by a detection of a terrestrial DMB signal, it needs to decode the signal data in each of both bands, couple the divided two data and then conduct application service decoding about the coupled data.
  • IF Intermediate Frequency
  • the additional RF processor 83 and the additional baseband processor 84 at the receiving end should be also configured to be compatible with the schemes adopted at the transmitting end.
  • the data decoder 85 decodes the baseband signals wherein they are decoded for each band for the service using the basic band and the additional band and then coupled. At this time, the data decoder 85 extracts the identification information denoting data for the service using all of the basic band and the additional band and the sequence information for data coupling at the receiving end, which are involved in the FIC upon decoding, to use them to combine data.
  • An application service decoder 86 provides application services such as geographic information service and so on by using the data from the data decoder 85.
  • FIG. 9 is a block diagram illustrating a configuration of a terrestrial DMB receiving system for a broadband data service in accordance with another embodiment of the invention.
  • the receiving system as shown in Fig. 9 receives a terrestrial DMB RF signal by employing a broadband RF processor 91 of 3 MHz or 6 MHz capable of receiving data of the two bands without using two RF processors.
  • the received terrestrial DMB RF signal is converted into a baseband signal by a single baseband processor 92 and then decoded by a data decoder 93 and an application service decoder 94 for its service.
  • the application service decoder 94 provides an application service by using the data outputted from the data decoder 93.
  • the invention when a system of wider bandwidth is required to accommodate future large- volume multimedia data, compared to the terrestrial DMB system being serviced at present, the invention as explained referring to Figs. 4 to 9 provides a system that can be compatibly used with the existing DMB systems using 1.5 MHz band before the bandwidth is changed into a terrestrial DMB system of 3 MHz or 6 MHz. As a result, the invention can accommodate the large capacity multimedia data readily and inexpensively, without changing to any new system, by applying Software Defined Radio (SDR) technology, etc. thereto.
  • SDR Software Defined Radio
  • the method of the present invention as mentioned above may be implemented by a software program and stored in a computer-readable storage medium such as CD- ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, and the like. Since this process may be readily carried out by those skilled in the art, details will not be provided herein.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

Cette invention concerne un dispositif de gestion de service de données et un procédé d'extension de bande de fréquence, un serveur de données DMD (Digital Multimedia Broadcasting/diffusion de multimédia numérique) qui utilise ce dispositif et ce servie, et un système récepteur DMB pour service de données à bande large. Le dispositif de gestion de service de données pour extension de bande de fréquence intègre un service de base de données DMB au moyen d'un système de transmission DMB de base ayant une bande de fréquence de base prédéterminée et un système de transmission DMB supplémentaire ayant une bande de fréquence supplémentaire autre que la bande de fréquence de base. Le dispositif comprend les éléments suivantes : unité de confirmation de la bande de fréquence utilisée pour chaque service de données ; et distributeur de données de service à un système capable de traiter les données au sein du système de transmission DMB de base let du système de transmission DMB supplémentaire en fonction de la bande de fréquence confirmée par l'unité de confirmation.
PCT/KR2006/002568 2005-10-14 2006-06-30 Dispositif de gestion d'un service de donnees/procede d'extension de bande de frequence et serveur de base de donnees dmb utilisant lesdits dispositif et procede et systeme recepteur dmb pour service de donnees a bande large WO2007043745A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06769135A EP1946547A4 (fr) 2005-10-14 2006-06-30 Dispositif de gestion d'un service de donnees/procede d'extension de bande de frequence et serveur de base de donnees dmb utilisant lesdits dispositif et procede et systeme recepteur dmb pour service de donnees a bande large

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2005-0097112 2005-10-14
KR1020050097112A KR100733959B1 (ko) 2005-10-14 2005-10-14 주파수 대역의 확장을 위한 데이터서비스 관리 장치 및 그방법과 그를 이용한 ｄｍｂ 데이터 서버, 및 광대역 데이터서비스를 위한 ｄｍｂ 수신 시스템

Publications (1)

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WO2007043745A1 true WO2007043745A1 (fr) 2007-04-19

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EP (1) EP1946547A4 (fr)
KR (1) KR100733959B1 (fr)
WO (1) WO2007043745A1 (fr)

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KR101537557B1 (ko) * 2013-12-24 2015-07-20 전자부품연구원 Ｄｒｍ 방송 시스템의 송신 장치

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JP2001144703A (ja) * 1999-11-16 2001-05-25 Toshiba Corp データ放送に於ける番組運用方法及びデータ放送送出システム
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Also Published As

Publication number Publication date
EP1946547A1 (fr) 2008-07-23
EP1946547A4 (fr) 2012-06-06
KR20070041210A (ko) 2007-04-18
KR100733959B1 (ko) 2007-06-29

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