EP1551105A1 - Dab-rundfunkempfängervorrichtung - Google Patents

Dab-rundfunkempfängervorrichtung Download PDF

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Publication number
EP1551105A1
EP1551105A1 EP03807981A EP03807981A EP1551105A1 EP 1551105 A1 EP1551105 A1 EP 1551105A1 EP 03807981 A EP03807981 A EP 03807981A EP 03807981 A EP03807981 A EP 03807981A EP 1551105 A1 EP1551105 A1 EP 1551105A1
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EP
European Patent Office
Prior art keywords
service
ensemble
memory
stored
services
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP03807981A
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English (en)
French (fr)
Other versions
EP1551105A4 (de
Inventor
Toshihiro Sasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JVCKenwood Corp
Original Assignee
Kenwood KK
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Filing date
Publication date
Application filed by Kenwood KK filed Critical Kenwood KK
Publication of EP1551105A1 publication Critical patent/EP1551105A1/de
Publication of EP1551105A4 publication Critical patent/EP1551105A4/de
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • 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
    • H04H2201/20—Aspects of broadcast communication characterised by the type of broadcast system digital audio broadcasting [DAB]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/37—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying segments of broadcast information, e.g. scenes or extracting programme ID
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/38—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space
    • H04H60/41—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas
    • H04H60/43—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas for identifying broadcast channels

Definitions

  • the present invention relates to a DAB broadcasting receiver for receiving digital audio broadcasting (hereinafter written also abbreviated to DAB broadcasting).
  • DAB systems are in practical use which are, for example, in conformity with the European Union Standard (Eureka 147).
  • one ensemble is constituted of a plurality of services (programs), and each service is constituted of a plurality of components.
  • Fig. 7 is a diagram illustratively showing the service structure of DAB broadcasting. The description is omitted because the details are written in the DAB specifications.
  • Fig. 5 is a diagram showing the format of a transmission frame of the DAB system.
  • a DAB signal is transmitted as an OFDM (Orthogonal Frequency Division Multiplex) signal subjected to orthogonal frequency division multiplexing, i.e., modulated through OFDM.
  • a transmission frame shown in Fig. 5 is obtained by the demodulated OFDM signal.
  • the transmission frame of a demodulated OFDM signal is constituted of blocks: a synchronization channel, an FIC (Fast Information Channel), an MSC (Maim Service Channel).
  • FIC transmits information necessary for a receiver to tune in a program and auxiliary information of the program
  • MSC transmits a sub channel such as audio and data.
  • FIC in one frame is constituted of three data blocks called FIB (Fast Information Block), and MSC is constituted of, although different depending upon a transmission mode, one to four data blocks called CIF (Common Interleaved Frame) and time-interleaved in the CIF unit.
  • CIF Common Interleaved Frame
  • a plurality of sub channels are duplexed, one sub channel corresponding to one program. Therefore, when a user desires to receive one program, the user selects a particular sub channel from CIF to tune in.
  • the DAB system when one ensemble is received, information of a plurality of services and components contained in the ensemble can be obtained so that it is possible to instantly switch to a different service and component contained in the ensemble, without changing the reception frequency.
  • a coarse synchronization NULL symbol is disposed at the start of the synchronization channel block, and a phase reference symbol (PRS) is disposed next, the phase reference symbol being used as a reference phase for OFDM demodulation (e.g., difference QPSK demodulation).
  • PRS phase reference symbol
  • Tuning by a DAB broadcasting receiver is performed in an ensemble unit, and when another ensemble is to be received, the reception frequency is changed.
  • a seek operation called ensemble up/down is preformed to search a receivable ensemble and receive it.
  • search operation search operation
  • the seek operation search operation
  • the seek operation when a user depresses an up button, search is performed from a lower to higher frequency, whereas when the user depresses a down-button, search is performed from a higher to lower frequency, and when the NULL symbol is detected, the seek operation is terminated.
  • the seek operation is terminated when the NULL symbol is detected three or more times successively, in order to avoid erroneous detection. If the NULL symbol cannot be detected three or more times successively, it is assumed that the NULL symbol was not detected.
  • the seek operation (search operation) for receiving an ensemble is terminated upon detection of the NU11 symbol disposed at the top of the DAB transmission frame.
  • identifiers (Sid) of services transmitted by an ensemble other than the ensemble now in reception are detected from "other ensemble information" transmitted by FIC (Fast Information Channel) in the DAB transmission frame shown in Fig. 5, and the service labels corresponding to the detected service identifiers (Sid) are displayed on a display means to allow a user to select one of the services displayed and receive it.
  • the other ensemble information is information of the ensemble different from the ensemble now in reception.
  • FIC contains a plurality of FIGs (Fast Information Group), and FIG includes other ensemble information such as FIG 0/21 (type 0 field for extension 21), FIG 0/24 (type 0 field for extension 24) and FIG 0/25 (type 0 field for extension 25).
  • the other ensemble information i.e., the information of an ensemble other than the ensemble now in reception
  • the other ensemble information is not always transmitted, and if the other ensemble information is not transmitted, the information of the services contained in an ensemble other than the ensemble now in reception cannot be acquired and the list of services receivable at another ensemble cannot be displayed.
  • the invention has been made in consideration of the above-described problems, and it is an object of the present invention to provide a DAB broadcasting receiver capable of tuning in easily and in a short time a service contained in an ensemble other than the ensemble now in reception.
  • the invention has the following configurations.
  • a DAB broadcasting receiver comprises: ensemble seek means for sequentially detecting all ensembles of DAM broadcasting in a predetermined frequency range; a first memory for storing a plurality of service identifiers contained in each of the detected ensembles; and display means for displaying a list of labels corresponding to all service identifiers stored in said first memory.
  • the service identifiers and service labels of services contained in an ensemble transmitted by FIG 0/2 and FIG 1/1 of a fast information channel (FIC), are read, and a correspondence between the service identifier and the service label is stored in said first memory.
  • the DAB broadcasting receiver further comprises a second memory for storing in advance correspondence data representative of correspondences between service identifier and service label for a number of service identifiers and service labels, wherein the service identifiers of services contained in an ensemble, transmitted by FIG 0/2 of the fast information channel (FIC), are read and stored in said first memory, service labels corresponding to the service identifiers stored in said first memory are searched by using the correspondence data stored in said second memory, and a correspondence between the service identifiers read from FIG 0/2 and corresponding service labels is stored in said first memory.
  • FIC fast information channel
  • the DAB broadcasting receiver further comprises operation means to be used for a user to operate the DAB broadcasting receiver, a service designated by the user via said operation means is identified among a list of service labels displayed on said display means, and an ensemble containing the identified service is received.
  • a DAB broadcasting receiver of the invention when the receiver is turned on or in response to other events, information of services contained in each ensemble in reception is obtained from a reception signal, all ensembles in a predetermined frequency range are sought, and a list of services (programs) contained in one of the ensembles is formed and stored in a memory.
  • all ensembles of DAB broadcast in the predetermined frequency range are actually received one after another to obtain information of a plurality of services (programs) contained in the ensemble and store the information.
  • the list of services contained in some ensemble is read from the memory and displayed on a display means.
  • MPU recognizes and identifies the service designated by the user, and the DAB broadcast receiver receives the ensemble containing the identified service. In this manner, the user can tune in the desired service easily and in a short time, among services contained in some ensemble.
  • Fig. 1 is a block diagram showing an example of a DAB broadcasting receiver according to the invention.
  • a DAB broadcasting receiver according to an embodiment of the invention will be described with reference to Fig. 1. Description will be made on the assumption that OFDM (Orthogonal Frequency Division Multiplex) is adopted as the modulation method of this DAB system.
  • OFDM Orthogonal Frequency Division Multiplex
  • an instruction to start reception or to seek at the DAM broadcasting receiver is given by an user to an MPU 31 via an operation means 33.
  • frequency information of DAB broadcasting to be received is sent from CPU 31 to a PLL 14 of a front end 13 as a reception frequency setting signal.
  • the front end 13 receives via an antenna 11 a DAB carrier at the set frequency, processes the signal to convert it into a predetermined intermediate frequency signal (IF signal) capable of being digitally processed, and outputs it to an analog/digital converter (A/D converter) 15.
  • the A/D converter 15 converts an analog signal into a digital information signal and supplies it to an I/Q 16.
  • I/Q 16 an FFT 17 and a DSP 18 constitute an OFDM demodulator 21.
  • I/Q 16 separates the digital information signal into an I signal and a Q signal to allow the succeeding stage to process an OFDM signal, and supplies them to FFT 17.
  • FFT 17 and DSP (digital signal processor) 18 perform fast Fourier transformation and output the converted signal to a channel decoder 23.
  • the channel decoder 23 performs de-interleaving for recovering the original signal order, error code detection and correction, and other processes.
  • the micro processor (MPU) 31 performs the error code correction and code error factor calculation, and if the code error factor is larger than a predetermined value, it supplies a mute control signal to an MPEG decoder 27 and an D/A converter 29 in order to stop a decoding operation and the transfer of a decoded signal obtained by the decoding operation.
  • the channel decoder 23 supplies the MPEG decoder 27 with compressed audio information of a tuned-in service, and the MPEG decoder 27 decodes the compressed audio information to decompress it. This signal is converted into analog information by the digital/analog converter (D/A converter) 29 and output as an analog audio signal.
  • D/A converter digital/analog converter
  • the MPU 31 is connected to the operation means 33, a display means 35, a first memory 37, an ensemble seek means 39 and a second memory 41.
  • the operation means 33 is a device used by an user to operate the DAM broadcasting receiver 10, for example, to designate a service to be received, from a list of services displayed on the display means 35.
  • the display means 35 is used for displaying a list of all services contained in one of a plurality of ensembles.
  • the first memory 37 stores a list of services contained in one of a plurality of ensembles.
  • the second memory 41 is used for storing correspondence data between service identifiers and their service labels, and may be omitted in some cases.
  • the ensemble seek means 39 is a means for sequentially seeking ensembles in a predetermined frequency range when the DAB broadcasting receiver is turned on or a user instructs.
  • the first and second memories 37 and 41 may be structured as one memory.
  • Fig. 4 is a flow chart illustrating a signal processing sequence at the channel decoder 23.
  • Step S41 a demodulated OFDM signal output from the OFDM demodulator 21 shown in Fig. 1 is processed. Namely, at Step S41, first, frequency interleaving executed for randomizing errors on the frequency axis is de-interleaved to recover the original order and obtain the transmission frame shown in Fig. 5.
  • Step S43 FIC and MSC are separated from the transmission frame.
  • data of FIC is subjected to Viterbi decoding, and at the same time at Step S47 a code error factor is calculated.
  • Steps S45 and S47 are actually executed almost at the same time by MPU 31, and if the code error factor is larger than a predetermined value, a mute control signal is supplied to the D/A converter 29 in order to stop decoding the MPEG audio signal and the transfer of the decoded signal.
  • Calculation of the code error factor at Step S47 is performed by comparing the data error-corrected through Viterbi decoding at Step S45 with the data before error correction.
  • Step S49 scrambling is released (descramble), and at Step S51 a CRC check is performed and the result is supplied to the micro processor (MPU) 31 as a control signal.
  • Step S55 of a plurality of sub channels, data of the sub-channel corresponding the program tuned in by the user is separated in accordance with a program designation signal supplied from MPU 31.
  • Step S57 time-de-interleaving is performed in order to release time interleaving for randomizing errors on the time axis. For FIC, this time-de-interleaving is not performed.
  • Step S59 Viterbi decoding is performed, at Step S61 de-scrambling is performed to output a DAB audio frame to the MPEG decoder 27 shown in Fig. 1.
  • Step S59 similar to FIC, code error detection and correction are performed for convolution encoded data through Viterbi decoding.
  • the ensemble seek means 39 sequentially seeks all ensembles in a predetermined frequency range.
  • the specific example of the seek operation is as follows. Namely, as a seek operation is instructed, reception frequencies are sequentially tuned in in the order of the frequency of each ensemble stored in a storage means (not shown) built in MPU, and when the NULL symbol is detected at a certain frequency, the seek operation is temporarily stopped to adjust the frequency by an automatic frequency adjusting means to receive the ensemble, whereas if the NULL symbol is not detected, the seek operation is maintained to continue.
  • a NULL symbol detecting means for detecting a NULL symbol is structured by FFT 17, DSP 18 and the like of the OFDM demodulator 21.
  • MPU 31 When the NULL symbol is detected and an ensemble can be received, MPU 31 extracts data of FIG 0/2 (type 0 field for extension 2) transmitted by FIC and stores service identifiers (SId) of a plurality of services contained in the ensemble into the first memory 37.
  • SId service identifiers
  • FIG. 6 is a diagram showing the data structure of FIG 0/2. As shown in this figure, FIG 0/2 contains information of service identifiers (Sid) of a plurality of services belonging to the ensemble now in reception.
  • Sid service identifiers
  • FIG 0/1 (type 0 field for extension 2) is extracted. Since FIG 0/1 contains the information of service labels of a plurality of services belonging to the ensemble now in reception, correspondence between each service label and the service Id obtained from FIG 0/2 along with the corresponding frequency information of the ensemble is stored in the first memory 37.
  • Fig. 3 is a diagram showing an example of service information stored in the first memory 37.
  • No. is a serial number added to the service information in the stored order thereof.
  • a correspondence between a service identifier SIdc extracted from the ensemble having a frequency fa and a service label SLc corresponding to SIDc are stored.
  • an ensemble label, a program type corresponding to the service Id may also be stored in correspondence with each other in the first memory 37.
  • a list of service information stored in the first memory 37 is displayed on the display means 35 when a user starts a tuning operation.
  • all items stored in the first memory 37 as illustratively shown in Fig. 3 may be displayed, or only some items, e.g., only the service label, may be displayed.
  • the services may be displayed in different colors for respective ensembles, or they may be displayed by changing lightness for respective ensembles.
  • program types of DAB are to be displayed, the program types may be displayed by changing the lightness and color for respective program types.
  • Fig. 8 is a diagram showing a displayed service list according to an embodiment of the invention.
  • Fig. 8(A) shows a service list displayed while an ensemble E1 is received, and the service added with a circle symbol is a service now in reception.
  • Services with oblique lines are services belonging to the same ensemble as that now selected, and they are displayed emphatically by increasing the brightness, changing color, flushing or other means.
  • Fig. 8B shows a service list displayed while an ensemble E2 different from the ensemble E1 is received, and services with a circle symbol is a service now in reception.
  • Services with oblique lines are services belonging to the same ensemble as that now selected.
  • the user designates one service by using the operation means 33 from a list of service information displayed on the display means 35.
  • MPU 31 supplies the front end 13 the reception frequency of the ensemble containing the service designated by the user, so that the ensemble containing the service designated by the user can be received.
  • the channel decoder 23 separates the user selected service from the received ensemble and supplies it to the MPEG decoder 27.
  • Fig. 2 is a flow chart illustrating an example of a service list forming process at the DAB broadcasting receiver according to the invention. The process illustrated in Fig. 2 starts when the DAB broadcasting receiver 10 is turned on or in response to a request from a user.
  • a mute-ON state enters by sending a mute signal to the MPEG decoder 27 and D/A 29 in order not to output noises to thereafter follow Step S13.
  • the frequency of an ensemble to be sought next is read from the ensemble frequency data stored in MPU 31 to thereafter follow Step S15.
  • the read frequency data is sent to PLL 14 of the front end 13 as reception frequency data to thereafter follow Step S17. Seeking ensembles are sequentially performed from a lower to higher frequency or in the reverse order.
  • Step S17 a start of OFDM demodulating is instructed to thereafter follow Step S19.
  • Step S19 it is judged whether the NULL symbol was detected, and if detected, the flow advances to Step S21, whereas if not, the flow advances to Step S13.
  • Step S21 it is judged whether the demodulator is synchronized, and if synchronized, the flow advances to Step S23, whereas if not, the flow advances to Step S13.
  • FIG 0/2 and FIG 1/1 are extracted to read the service identifiers (SId) and service labels of services belonging to the ensemble now in reception and store the service Ids, service labels and ensemble frequency in the first memory 37 in correspondence with each other, to thereafter advance to Step S25.
  • SId service identifiers
  • Step S25 it is judged whether a predetermined frequency range (band) is completely sought (searched), and if sought, the flow advances to Step S27, whereas if not, the flow advances to Step S13.
  • Step S27 a mute-OFF signal is sent to the MPEG decoder 27 and D/A 29 to thereafter follow Step S29.
  • Step S29 a list of service information stored in the first memory 37 is displayed on the display means 35. In this display, it is not necessary to display all the service information stored in the first memory 37, but only some items, e.g., No., service ID and service label may be displayed in correspondence with each other as a list. In this manner, all services (programs) contained in one of services in the predetermined frequency range can be displayed on the display means 35 as a list.
  • the service identifiers and service labels of services contained in the ensemble are read from FIG 0/2 and FIG 1/1 of the fast information channel (FIC), and the correspondence between the service identifiers and service labels is stored in the first memory 37.
  • the label information is not transmitted by FIG 1/1, data representative of the correspondence between a number of service identifiers and service labels may be stored in advance in the second memory 41.
  • the second memory 41 is provided for storing in advance the data representative of the correspondence between a plurality of service identifiers and service labels, and the data representative of the correspondence between a number of service identifiers and service labels is stored in advance in the second memory 41.
  • the service identifiers of services contained in the ensemble are read from FIG 0/2 of the fast information channel (FIC) and stored in the first memory 37, the service labels corresponding to the service identifiers stored in the first memory 37 are searched by using the correspondence data stored in the second memory 41, and the correspondence data between the service identifiers read from FIG 0/2 and their service labels is stored in the first memory 37.
  • FIC fast information channel
  • the service list stored in the first memory 37 is displayed on the display means 35.
  • the user designates a service desired to be received, from the services displayed in the list, by using the operation means 33.
  • MPU 31 recognizes and identifies the service designated by the user, and sends the frequency of the ensemble containing the service to PLL 14 of the front end 13 as a reception frequency setting signal.
  • the front end 13 receives the given reception frequency, and the channel decoder 23 extracts the service designated by the user from the received ensemble and sends it to the MPEG decoder 27.
  • the DAB broadcasting receiver when the DAB broadcasting receiver is turned on, all ensembles of DAB broadcasting in the predetermined frequency range are actually received one after another to acquire the information of services contained in the ensemble now in reception and store it in the memory.
  • the service identifiers of all services contained in a certain ensemble are stored in the memory.
  • the service list stored in the memory is displayed on the display means, and the user selects a service desired to receive from the service list. It is therefore possible to tune in the service in a short time.
  • a desired service when a user desires to tune in, a desired service can be selected easily and in a short time from services (programs) contained in one of a plurality of ensembles without manually switching between ensembles to be received, even if the service desired to be received is not contained in the ensemble now in reception.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
EP03807981A 2002-10-09 2003-09-30 Dab-rundfunkempfängervorrichtung Withdrawn EP1551105A4 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2002295906 2002-10-09
JP2002295906A JP2004134931A (ja) 2002-10-09 2002-10-09 Ｄａｂ放送受信装置
PCT/JP2003/012527 WO2004034599A1 (ja) 2002-10-09 2003-09-30 Ｄａｂ放送受信装置

Publications (2)

Publication Number Publication Date
EP1551105A1 true EP1551105A1 (de) 2005-07-06
EP1551105A4 EP1551105A4 (de) 2011-07-20

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EP03807981A Withdrawn EP1551105A4 (de) 2002-10-09 2003-09-30 Dab-rundfunkempfängervorrichtung

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EP (1) EP1551105A4 (de)
JP (1) JP2004134931A (de)
KR (2) KR20040073454A (de)
DE (1) DE03807981T1 (de)
TW (1) TW200408207A (de)
WO (1) WO2004034599A1 (de)

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EP1696595A2 (de) 2005-02-28 2006-08-30 Samsung Electronics Co., Ltd. Mobiles Endgerät und Verfahren zum Bereitstellen einer Benutzeroberfläche mittels empfangenen digitalen Rundfunkdaten
EP1732250A3 (de) * 2005-05-30 2007-11-07 Samsung Electronics Co.,Ltd. Verfahren zur Bereitstellung einer Benutzerschnittstelle in einem Endgerät für die mobile Kommunikation mit Verwendung von Empfangsdaten vom terrestrischen digitalen Rundfunk
EP1879310A1 (de) * 2006-07-11 2008-01-16 Harman Becker Automotive Systems GmbH Verfahren zur Dekodierung eines digitalen Rundfunkdatenstroms
WO2009044323A2 (en) * 2007-10-03 2009-04-09 Koninklijke Philips Electronics N.V. A method of managing multimedia service on a multimedia hand-held device
EP1655867A3 (de) * 2004-11-09 2011-05-04 Samsung Electronics Co., Ltd. Digitaler Multimediarundfunkempfänger und Benutzerschnittstellenverfahren dafür
EP3059947A1 (de) * 2009-09-30 2016-08-24 Audiovox Corporation Empfänger und verteilungseinheit für ein fahrzeugunterhaltungssystem

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KR100751639B1 (ko) * 2004-12-24 2007-08-22 엘지전자 주식회사 디지털 멀티미디어 방송에 있어서의 선택적 부가 서비스처리 방법
KR100710308B1 (ko) * 2005-01-25 2007-04-23 엘지전자 주식회사 유료 이동형 방송 서비스를 위한 데이터 구조, 유료이동형 방송 서비스 방법, 및 이동형 방송 수신기
KR101102712B1 (ko) * 2005-03-31 2012-01-05 삼성전자주식회사 디지털 멀티미디어 방송 수신기의 앙상블 검색 방법
KR100739738B1 (ko) * 2005-10-10 2007-07-13 삼성전자주식회사 듀얼 디스플레이를 가진 디지털 멀티미디어 방송 서비스수신 장치에서 서비스를 디스플레이하는 방법 및 그 수신장치
KR100710248B1 (ko) * 2005-10-28 2007-04-20 엘지전자 주식회사 방송 수신기, 방송 서비스 구분 방법, 및 데이터 구조
KR100722187B1 (ko) 2006-02-03 2007-05-29 (주) 엘지텔레콤 토글전환 디엠비 단말장치 및 토글전환 방법
KR100820826B1 (ko) 2006-03-15 2008-04-10 엘지전자 주식회사 방송 수신기 및 처리 방법
KR101457684B1 (ko) * 2007-10-30 2014-11-04 삼성전자주식회사 방송통신 시스템에서 제어 정보를 송수신 하는 방법 및장치

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EP1551105A4 (de) 2011-07-20
WO2004034599A1 (ja) 2004-04-22
TW200408207A (en) 2004-05-16
KR20060114388A (ko) 2006-11-06
DE03807981T1 (de) 2005-12-15
JP2004134931A (ja) 2004-04-30
KR20040073454A (ko) 2004-08-19

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