EP0961432A2 - Empfänger für den Empfang von digitalen Tonrundfunkprogrammen (DAB) mit mehreren Schutzgraden - Google Patents

Empfänger für den Empfang von digitalen Tonrundfunkprogrammen (DAB) mit mehreren Schutzgraden Download PDF

Info

Publication number
EP0961432A2
EP0961432A2 EP99304216A EP99304216A EP0961432A2 EP 0961432 A2 EP0961432 A2 EP 0961432A2 EP 99304216 A EP99304216 A EP 99304216A EP 99304216 A EP99304216 A EP 99304216A EP 0961432 A2 EP0961432 A2 EP 0961432A2
Authority
EP
European Patent Office
Prior art keywords
dab
information
signal
protection level
received
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Withdrawn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
EP99304216A
Other languages
English (en)
French (fr)
Other versions
EP0961432A3 (de
Inventor
Kazuhiko Pioneer Electronic Corporation Uchiyama
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Publication of EP0961432A2 publication Critical patent/EP0961432A2/de
Publication of EP0961432A3 publication Critical patent/EP0961432A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/20—Arrangements for broadcast or distribution of identical information via plural systems
    • H04H20/22—Arrangements for broadcast of identical information via plural broadcast systems
    • 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]

Definitions

  • the present invention relates to a digital broadcast receiver, and more particularly to a receiver for receiving digital audio broadcasting (hereinafter called "DAB”) which has been put into practical use in Europe.
  • DAB digital audio broadcasting
  • DAB system conforming to Europe Standard (Eureka 147) is known.
  • the DAB incorporates one ensemble which is composed of a plurality of services. Each service is composed of a plurality of components including English and German.
  • Fig. 7 shows an example of services of the DAB system such that linking is illustrated which is established among services (three in this case) and components (six in this case) constituting an ensemble 1 and an OFDM signal actually transmitted from a DAB station.
  • the OFDM signal which is transmitted from the DAB station includes FIC (Fast Information Channel) and MSC (Main Service Channel).
  • Each of sub-channels (SubCh 0 to SubCh 63) for constituting the MSC corresponds to each component.
  • the FIC contains information about services which can be used by the ensemble and information about the linkage among the services, components and sub-channels.
  • the DAB enables information about the FM station which broadcasts the program which is the same as that which is being broadcast to be contained in a variety of information data items contained in the FIC. Information above includes identification information and information about the frequency of the FM station which broadcasts the same program.
  • the DAB is able to specify the bit rate of audio information for each sub-channel and the protection levels (1 to 5) of the transmission.
  • the protection level indicates resistance against a transmission error (since the coding rate is raised as the figure is enlarged, redundancy is reduced and thus resistance against an error is lowered).
  • the coding rate is determined by performing convolution-coding and extracting (puncturing) a portion of coded signals in accordance with the protection level. Note that the DAB is regulated to have an average code rate of 0.34 to 0.75, the average code rate being obtained from the bit rate of audio information and the protection level. Also the foregoing information item is transmitted through the FIC.
  • an object of the present invention is to reflect the annoyance of heard noise on the reference value for use to evaluate a state of reception of a reproduced output.
  • a digital broadcast receiver for receiving a digital audio broadcast which has a plurality of protection levels and which is able to vary a coding rate of a signal to be transmitted to correspond to each protection level and transmit at least protection level information together with digital audio information
  • the digital broadcast receiver comprising: a structure that protection level information is extracted from a received signal, a reference value corresponding to extracted protection level information is decided, and then a state of reception of the received signal is determined in accordance with the reference value and the received signal.
  • a digital broadcast receiver according to the first aspect of the invention, further comprising a table for making plural reference values and plural protection levels to correspond to one another, wherein one certain reference value is selected from the table in accordance with extracted protection level information.
  • a digital broadcast receiver according to the first or second aspect of the invention, wherein the digital audio broadcast is able to furthermore transmit audio bit-rate information of digital audio information, audio bit-rate information is extracted from the received signal, and also extracted bit rate information is used to decide the reference value.
  • a digital broadcast receiver according to the third aspect of the invention, further comprising a table for making plural reference values, plural protection levels and plural audio bit-rate information items to correspond to one another, wherein one certain reference value is selected from the table in accordance with extracted protection level information and audio bit-rate information.
  • a digital broadcast receiver comprising: an FM receiving portion incorporating an RDS decoder; a DAB receiving portion; and a control unit for performing control such that an output of the receiving portion in a superior state of reception is selected as an output of the digital broadcast receiver in accordance with a state of reception of an FM signal received by the FM receiving portion and a DAB signal received by the DAB receiving portion, wherein the control unit incorporates extracting means for extracting at least protection level information from the received DAB signal, and a state of reception of the DAB signal is determined in accordance with extracted protection level information and the received DAB signal.
  • Fig. 1 is a block diagram showing a digital broadcast receiver according to a first embodiment of the present invention and incorporating an RDS receiving portion.
  • the receiver incorporates a DAB receiving portion for receiving a digital broadcast, an FM receiving portion for receiving an RDS broadcast, a system control unit 1, a switching portion 2, an amplifier 3, a speaker unit 4 and a storage portion 5.
  • the DAB receiving portion incorporates a DAB-FE (a front end for the DAB) 11 for tuning in to a DAB station; an A/D converter 12 for converting a received analog signal into a digital signal; an FFT (Fast Fourier Transformation) portion 13 for demodulating an OFDM wave; a difference demodulating portion 14 for demodulating difference modulation; a viterbi decoding portion 15 for correcting an error; and a musicam decoder 16 for decoding compressed musical data to original audio data. Since the specific structure of each element has been disclosed in a variety of document, detailed description is omitted here.
  • the musicam decoder 16 outputs, to the system control unit 1, frame error information about an error of an audio frame of received data.
  • the FM receiving portion incorporates an FM-FE (a front end for the FM) 21 for tuning in to an FM station; an FM detector 22 for amplifying an intermediate-frequency (IF) signal to detect a composite signal in the amplified signal; and an RDS decoder 23 for extracting an RDS signal from the composite signal to demodulate the RDS signal.
  • FM-FE front end for the FM
  • IF intermediate-frequency
  • RDS decoder 23 for extracting an RDS signal from the composite signal to demodulate the RDS signal.
  • the FM receiving portion outputs, to the system control unit 1, block error information about a block error of received RDS data.
  • the system control unit 1 controls the DAB receiving portion and the FM receiving portion. Moreover, the system control unit 1 reads the foregoing FIC information item from the DAB receiving portion to store a variety of information data items contained in read data in the storage portion 5. Information to be stored includes information about services which can be used by an ensemble, information about the linkage among the services, components and sub-channels and information (a PI code, an FI (frequency information ) list) about FM stations. The system control unit 1 enables the FM receiving portion to quickly detect a candidate of the service follow by outputting read PI code information and FI list information to the FM-FE portion 21 and the RDS decoder 23.
  • the system control unit 1 controls the switching portion 2. Specifically, when a determination is made that a state of reception of the service which is being received by the DAB receiving portion is superior to that of the service which is being received by the FM receiving portion (or the states of reception are substantially the same), reproduced sound from the DAB receiving portion is selected and output. When a determination has been made that a state of reception of the service which is being received by the FM receiving portion is superior to that of the service which is being received by the DAB receiving portion, reproduced sound from the FM receiving portion is selected and output. The output reproduced sound is amplified by the amplifier 3 so as to be output from the speaker unit 4.
  • the digital broadcast receiver has the above-mentioned schematic structure.
  • Fig. 2 is a flow chart of the operation of the system control unit 1 in a service follow mode. Note that the foregoing flow chart is executed after input of an instruction to perform the service follow has been made by a user. At this time, the system control unit 1 determines whether or not the DAB receiving portion has been tuned in to any one of the ensembles (step S1).
  • the FIC data is decoded to extract information about the foregoing protection level and information about the services which can be used by the ensemble, information indicating the linkage among the services, components and sub-channels, PI code information and FI list information to store information in the storage portion 5 (step S2).
  • a service required by the user is selected to output the service from the speaker unit 4 (step S3).
  • the system control unit 1 calculates error ratio BER of each of the two receiving portions in accordance with error information supplied from the DAB receiving portion and the FM receiving portion (step S4). A specific method of calculating the error rate will be described later.
  • step S5 the error ratio BER of the DAB signal calculated in step S4 is compared with a reference value (step S5).
  • a reference value for evaluating a state of reception of the selected sub-channel is selected from the corresponding table in the storage portion 5.
  • FIG. 3 An example of the table constituted in the storage portion 5 is shown in Fig. 3.
  • the table is formed to correspond to the protection level PL.
  • a reference value corresponding to any one of protection levels 1 to 5 which are regulated by the DAB and which can be selected can be obtained.
  • step S5 a determination is made as a result of the comparison that the error ratio BER is smaller the reference value (step S5; small), the state of reception of the DAB station has not deteriorated. Therefore, the operation is returned to step S4 so that the error ratio BER is again calculated in accordance with supplied frame error information (step S4).
  • the error ratio BER is compared with the reference value (step S5). Therefore, when a satisfactory state of reception is realized, the operation circulates in a loop composed of steps S4 and S5.
  • step S6 If a determination is made as a result of the comparison between the selected reference value and the calculated error ratio BER that the calculated error rate is larger than the reference value (step S5; large), the state of reception of the DAB station has deteriorated. Therefore, the operation proceeds to step S6 so that whether or not service follow is permitted for the RDS station which is broadcasting the same program is determined. Specifically, whether or not the same program is being broadcast in the FM band (step S6) is determined. Then, whether or not an FM-RDS station, the state of reception of which is superior to that of the DAB station, exists is determined (step S7).
  • step S7 When a determination is made in step S7 that the service follow is permitted, the system control unit 1, in step S8, controls the switching portion 2 to reproduce sound of the RDS station.
  • step S6 and S7 If a determination is made in steps S6 and S7 that an RDS station suitable for the service follow cannot be detected, the operation is returned to step S4 so that the supervisory of the states of reception of the two receiving portions is continued. If the state of reception state of reception of the FM receiving portion has been improved, a determination is made in step S7 that the service follow is permitted.
  • the system control unit 1 controls the switching portion 2 to reproduce sound of the RDS station (step S8).
  • the state of reception of the DAB station is evaluated in step S5 such that an optimum reference value for the evaluation is determined in accordance with information about the protection level of the DAB signal which is being received. In accordance with the reference value and the received DAB signal, the state of reception is determined. Therefore, the annoyance of heard noise and a result of the determination can always be made coincide with each other.
  • step S4 As a parameter for evaluating the states of reception of the DAB signal and the FM signal, error information which is detected by each receiving portion is employed. Specifically, the state of reception of the FM signal which is being received by the FM receiving portion is evaluated in accordance with the block error rate of received RDS data. The state of reception of the DAB signal which is being received by the DAB receiving portion is evaluated in accordance with the frame error rate of musicam data which constitutes the sub-channel.
  • the foregoing structure is employed on the basis of the following facts.
  • Figs. 4A and 4B are diagrams showing RDS data and audio data which is transmitted by the DAB.
  • Fig. 4A shows the structure of audio data for use in DAB
  • Fig. 4B shows the structure of RDS data.
  • one group of RDS data is composed of four data blocks composed of offsets A to D. Existence of an error can be detected in each block.
  • One block has a size of 22 ms.
  • DAB audio data is based on MPEG1 layer 2.
  • One frame has a size of 24 ms.
  • information items including the DAB header, bit allocation information and ScFSI are disposed from the leading end of DAB audio data.
  • one frame of DAB audio digital audio contains CRC for detecting an error of each of the DAB header, bit allocation information and ScFSI and CRC for detecting an error of a scale factor. Therefore, the CRC enables existence of an error to be detected in frame (hereinafter called a "block" similarly to that of RDS data) units.
  • the block error ratio BER is employed to determine the state of reception of the received DAB signal.
  • the block error rate of RDS digital audio is employed to determine the state of reception of the received FM signal.
  • the block error rate and the annoyance of heard noise of RDS data has a proportional relationship. Therefore, the block error rate of RDS data and the state of reception of FM sound can be made accurately correspond to each other.
  • the first embodiment has the structure that the block error rates are compared with each other to satisfactorily perform the service follow.
  • an estimated error rate with which an error is estimated in accordance with input/output data of a viterbi decoder is employed as a means for detecting the state of reception of the DAB station.
  • Fig. 5 is a block diagram showing a digital broadcast receiver adapted to the foregoing method. Note that similar portions to those shown in Fig. 1 are given the same reference numerals and the similar portions are omitted from description.
  • the difference from the digital broadcast receiver shown in Fig. 1 lies in a recoding portion 17 provided for the purpose of detecting the state of reception of the DAB station.
  • An output of the viterbi decoder 15 serving as an error correction means is, in the recoding portion 17, again subjected to the convolution-coding process and the punctured process, and then output to a system control unit 31.
  • the system control unit 31 makes coincide the positions of data items subjected to the comparison with each other by delaying a signal supplied from the viterbi decoder 15 for a predetermined time. Then, the system control unit 31 subjects delayed data supplied from the viterbi decoder 15 and recoded data to a comparison to detect a bit error of the received DAB signal.
  • the detected number of errors is divided by the number of all samples so that an error ratio of the received DAB signal is estimated.
  • an optimum reference value is determined in accordance with protection level information of the received DAB signal. In accordance with the reference value and the calculated error rate, the state of reception of the received DAB signal is determined.
  • the system control unit 31 controls an attenuator 32. Specifically, an amount of attenuation is enlarged as the deterioration of the state of reception to vary the output of the speaker unit 4.
  • the second embodiment is able to evaluate the state of reception by using evaluation criteria which correspond to the protection level of the reference value DAB signal.
  • Audio bit rate information of audio data which constitutes the sub-channel may be used to make a similar table to determine an optimum reference value in accordance with audio bit rate information of the sub-channel which is being selected. That is, the DAB employs MUSICAM as a means for compressing audio data. Since the audio bit rate can be varied from 32 kbit/s to 384 kbit/s, audio bit rate information is extracted from the received DAB signal so as to be used when an optimum reference value is determined. The two methods may be combined with each other to determine the optimum reference value in accordance with protection level information and audio bit rate information.
  • symbols PL and BR indicate a protection level and an audio bit rate, respectively. If protection level information and audio bit rate information can be extracted from the received signal, one reference value can be determined by using the foregoing table. If the protection level is 1 and the audio bit rate is 32 kbit/s, a reference value of 1.1 is decided.
  • the estimated error rate according to the second embodiment may be used to determine the state of reception of DAB data.
  • the intensity of the electric field of the received signal may be used to determine the state of reception of the RDS station.
  • protection level information is extracted from a received signal, a reference value corresponding to extracted protection level information is decided, and then a state in which the received signal has been received is determined in accordance with the reference value and the received signal. Therefore, the state of reception can be evaluated by using evaluation criteria corresponding to the protection levels of the received signal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
EP99304216A 1998-05-28 1999-05-28 Empfänger für den Empfang von digitalen Tonrundfunkprogrammen (DAB) mit mehreren Schutzgraden Withdrawn EP0961432A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP16418598A JP3614301B2 (ja) 1998-05-28 1998-05-28 ディジタル放送受信機
JP16418598 1998-05-28

Publications (2)

Publication Number Publication Date
EP0961432A2 true EP0961432A2 (de) 1999-12-01
EP0961432A3 EP0961432A3 (de) 2001-09-12

Family

ID=15788322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99304216A Withdrawn EP0961432A3 (de) 1998-05-28 1999-05-28 Empfänger für den Empfang von digitalen Tonrundfunkprogrammen (DAB) mit mehreren Schutzgraden

Country Status (2)

Country Link
EP (1) EP0961432A3 (de)
JP (1) JP3614301B2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1172952A3 (de) * 2000-07-11 2005-04-06 Pioneer Corporation Empfänger für den Empfang von digitalen Rundfunksendungen mit einer Vorrichtung zur Erfassung der Bitfehlerrate und der Signalstärke der digitalen Rundfunkübertragungen
EP1404023A3 (de) * 2002-09-24 2005-11-09 Samsung Electronics Co., Ltd. Kanaldekodierer für einen europäischen DAB Empfänger und zugehöriges Kanaldekodierverfahren
FR3087599A1 (fr) * 2018-10-19 2020-04-24 Psa Automobiles Sa Procede de classification du niveau de bruit d’un signal audio

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002300061A (ja) * 2001-03-30 2002-10-11 Clarion Co Ltd 放送受信装置
US8199827B2 (en) 2005-10-13 2012-06-12 Lg Electronics Inc. Method of processing a signal and apparatus for processing a signal
AU2006300101B2 (en) * 2005-10-13 2010-09-16 Lg Electronics Inc. Method and apparatus for signal processing
JP6605310B2 (ja) 2015-11-26 2019-11-13 アルパイン株式会社 放送受信装置及び放送受信制御方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5584051A (en) * 1991-11-01 1996-12-10 Thomson Consumer Electronics Sales Gmbh Radio broadcast transmission system and receiver for incompatible signal formats, and method therefor
EP0865176A2 (de) * 1997-03-10 1998-09-16 Pioneer Electronic Corporation Rundfunkempfänger für den Empfang von digitalen Tonprogrammen bzw. den digitalen Zusatzdaten, die in den Tonprogrammen enthalten sind
EP0946011A2 (de) * 1998-03-23 1999-09-29 Pioneer Electronic Corporation Empfänger für den Empfang von digitalen Tonrundfunkprogrammen und von UKW Rundfunkprogrammen mit Radiodatensignalen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5584051A (en) * 1991-11-01 1996-12-10 Thomson Consumer Electronics Sales Gmbh Radio broadcast transmission system and receiver for incompatible signal formats, and method therefor
EP0865176A2 (de) * 1997-03-10 1998-09-16 Pioneer Electronic Corporation Rundfunkempfänger für den Empfang von digitalen Tonprogrammen bzw. den digitalen Zusatzdaten, die in den Tonprogrammen enthalten sind
EP0946011A2 (de) * 1998-03-23 1999-09-29 Pioneer Electronic Corporation Empfänger für den Empfang von digitalen Tonrundfunkprogrammen und von UKW Rundfunkprogrammen mit Radiodatensignalen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WECK C: "DER BITFEHLERSCHUTZ BEI DAB" RUNDFUNKTECHNISCHE MITTEILUNGEN,DE,MENSING. NORDERSTEDT, vol. 40, no. 1, 1 March 1996 (1996-03-01), pages 1-13, XP000586094 ISSN: 0035-9890 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1172952A3 (de) * 2000-07-11 2005-04-06 Pioneer Corporation Empfänger für den Empfang von digitalen Rundfunksendungen mit einer Vorrichtung zur Erfassung der Bitfehlerrate und der Signalstärke der digitalen Rundfunkübertragungen
US7039127B2 (en) 2000-07-11 2006-05-02 Pioneer Corporation Digital broadcast receiving apparatus
EP1404023A3 (de) * 2002-09-24 2005-11-09 Samsung Electronics Co., Ltd. Kanaldekodierer für einen europäischen DAB Empfänger und zugehöriges Kanaldekodierverfahren
EP1727288A2 (de) * 2002-09-24 2006-11-29 Samsung Electronics Co., Ltd. Kanaldekodierer für einen europäischen DAB Empfänger und entsprechendes Kanaldekodierungsverfahren
EP1727288A3 (de) * 2002-09-24 2006-12-13 Samsung Electronics Co., Ltd. Kanaldekodierer für einen europäischen DAB Empfänger und entsprechendes Kanaldekodierungsverfahren
EP2323267A1 (de) * 2002-09-24 2011-05-18 Samsung Electronics Co., Ltd. Kanaldekodierer für einen europäischen DAB Empfänger und zugehöriges Kanaldekodierverfahren
FR3087599A1 (fr) * 2018-10-19 2020-04-24 Psa Automobiles Sa Procede de classification du niveau de bruit d’un signal audio

Also Published As

Publication number Publication date
EP0961432A3 (de) 2001-09-12
JPH11340853A (ja) 1999-12-10
JP3614301B2 (ja) 2005-01-26

Similar Documents

Publication Publication Date Title
JP3520307B2 (ja) 放送伝送方式および放送受信機
US20060083380A1 (en) Receiver
KR100702356B1 (ko) 서브채널 디코더 및 이를 이용한 디지털 멀티미디어 방송수신방법
KR20180094022A (ko) 하이브리드 라디오 시스템에서의 자동 오디오 정렬을 위한 방법 및 장치
EP0961432A2 (de) Empfänger für den Empfang von digitalen Tonrundfunkprogrammen (DAB) mit mehreren Schutzgraden
EP0946011B1 (de) Empfänger für den Empfang von digitalen Tonrundfunkprogrammen und von UKW Rundfunkprogrammen mit Radiodatensignalen
EP0874485A2 (de) Empfänger für den digitalen Tonrundfunk
CA2540976C (en) Method and device for broadcasting auxiliary data in an analog radio broadcast system
EP1191722A2 (de) Gerät und Verfahren für den Empfang vom digitalen Hörfunk DAB
EP0865176A2 (de) Rundfunkempfänger für den Empfang von digitalen Tonprogrammen bzw. den digitalen Zusatzdaten, die in den Tonprogrammen enthalten sind
EP0954131B1 (de) Rundfunkempfänger mit einem Empfänger für den digitalen Tonrundfunk DAB und mit einem UKW Rundfunkempfänger mit einem RDS Dekoder
EP0961431A2 (de) Empfänger für den Empfang von digitalen Rundfunkprogrammen (DAB), mit einem Wahlschalter zur Auswahl eines Tonsignals von mehreren Signalquellen
JP3345557B2 (ja) デジタルオーディオ放送受信装置及び受信方法
KR100511553B1 (ko) 디지털 멀티미디어 방송 수신기와 그의 동작방법
EP0701341A2 (de) Verfahren für die Senderauswahl in einem Sendernetz und Verwendung eines solchen Verfahrens in einem Radiodatenempfänger
JP3135514B2 (ja) ディジタルオーディオ放送の受信装置
JPH11234154A (ja) 多重放送受信機
JP2014033325A (ja) ラジオ受信機
JPH11196009A (ja) ラジオ受信機
JP3481150B2 (ja) ラジオ受信機
US6968164B2 (en) Method of controlling filter bandwidth in a radio receiver for a duplicative broadcast signal
KR100908487B1 (ko) 디지털 멀티미디어 방송(ｄｍｂ) 수신기의 채널검색수신감도 개선방법
EP0961433A2 (de) Empfänger für den Empfang von digitalen Rundfunkprogrammen mit einer Vorrichtung zur Auswahl eines Programms aus einer Mehrzahl von vorgespeicherten Programmen
JPH0888572A (ja) ラジオ受信機
JP3511447B2 (ja) 情報データ信号受信機及びこれを用いたシステム

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

Kind code of ref document: A2

Designated state(s): DE FR GB

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20020117

AKX Designation fees paid

Free format text: DE FR GB

17Q First examination report despatched

Effective date: 20061205

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20091201