EP0961431A2 - Empfänger für den Empfang von digitalen Rundfunkprogrammen (DAB), mit einem Wahlschalter zur Auswahl eines Tonsignals von mehreren Signalquellen - Google Patents

Empfänger für den Empfang von digitalen Rundfunkprogrammen (DAB), mit einem Wahlschalter zur Auswahl eines Tonsignals von mehreren Signalquellen Download PDF

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Publication number
EP0961431A2
EP0961431A2 EP99304209A EP99304209A EP0961431A2 EP 0961431 A2 EP0961431 A2 EP 0961431A2 EP 99304209 A EP99304209 A EP 99304209A EP 99304209 A EP99304209 A EP 99304209A EP 0961431 A2 EP0961431 A2 EP 0961431A2
Authority
EP
European Patent Office
Prior art keywords
dab
receiver
receiving portion
digital broadcast
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Withdrawn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
EP99304209A
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English (en)
French (fr)
Other versions
EP0961431A3 (de
Inventor
Katsuhiko c/o Pioneer Electronic Corp. Toki
Takashi C/O Pioneer Electronic Corp. Miyake
Mikito c/o Pioneer Electronic Corporation Abe
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 EP0961431A2 publication Critical patent/EP0961431A2/de
Publication of EP0961431A3 publication Critical patent/EP0961431A3/de
Withdrawn legal-status Critical Current

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    • 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 receiver which is capable of receiving at least digital audio broadcasting (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. 3 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 which is 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 broadcast which is being widespread, covers a narrow area as compared with the area covered by the FM broadcast at present. Therefore, there are many areas which cannot receive the DAB broadcast.
  • the present DAB receivers cannot easily detect the DAB broadcasts which can be received at the present position and whether or not reception can be performed during selection of another signal source, such as a CD. Therefore, a user is required to frequently switch the signal source to the DAB to operate the searching function of the receiver to confirm a state of reception. Thus, there arises a problem of unsatisfactory operability.
  • the DAB broadcast has a structure that a plurality of services can be contained in one ensemble.
  • object of the present invention is to provide a receiver which permits a user to easily detect whether or not a certain digital broadcast can be received at the present position during selection of another signal source.
  • Another object of the present invention is to provide a receiver which enable a user to easily detect whether or not an ensemble which is being selected has been ended.
  • a receiver comprising: selection means for selecting output sound of the receiver among a plurality of output sounds of signal sources; announcing means; and a control unit for controlling at least either of the selection means or the announcing means, wherein a digital broadcast receiving portion is included as one of the signal sources, and when output sound of the digital broadcast receiving portion is being selected, the control unit determines a state of reception of a signal, which is being received by the digital broadcast receiving portion, and announces whether or not the digital broadcast, which is being received, has been completed through the announcing means in accordance with a result of the determination.
  • a receiver according to the first aspect of the invention, wherein the control unit incorporates changing means for changing reception frequency and changes the reception frequency to search another digital broadcast when a signal source different from that selected by the digital broadcast receiving portion is being selected.
  • a receiver according to the second aspect of the invention, wherein the control unit announces whether or not at least one digital broadcast can be received through the announcing means in accordance with a result of the search.
  • Fig. 1 is a block diagram showing a receiver according to the embodiment of the present invention.
  • the receiver incorporates a DAB receiving portion for receiving a digital broadcast and an FM receiving portion as signal sources.
  • the receiver incorporates a system control unit 1, a selection means 2, an amplifier 3, a speaker unit 4, a storage portion 5 and a display portion 6.
  • the DAB receiving portion incorporate a DAB-FE (a front end for the DAB) 11 for tuning in to a DAB station under control of the system control unit 1; an A/D converter 12 for converting a received analog signal into a digital signal; an FFT (Fast Fourier Transformation)/difference demodulating portion 13 for demodulating the transmitted OFDM wave to demodulate the difference; a viterbi decoding portion 14 for correcting an error; and an audio decoder (a musicam decoder) 15 for decoding compressed audio data (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 FM receiving portion incorporates an FM-FE (a front end for the FM) 21 for tuning in to an FM station under control of the system control unit 1; an FM detector 22 for amplifying an intermediate-frequency (IF) signal to detect a composite signal from the amplified signal; and an RDS decoder 23 for extracting an RDS signal from the detected 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 detected composite signal to demodulate the RDS signal.
  • the system control unit 1 controls a tuning operation of 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 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, information (a PI code, an FI (frequency information ) list) about FM stations, Asu (Announcement support) which is information indicating whether or not a specific program is supported and Asw (Announcement switching) which is information for determining start of a specific program.
  • the system control unit 1 also controls the selection means 2. Basically, when a user instructs a DAB broadcast, audio output from the DAB receiving portion is selected as the output from the receiver. When an FM broadcast is instructed, audio output from the FM receiving portion is selected as the output from the receiver. An output from the selection means 2 is amplified by the amplifier 3 so as to be output through the speaker unit 4.
  • the system control unit 1 turns on/off a power source for each of the portions which constitute the DAB receiving portion.
  • a DAB indicator is provided for the display portion 6.
  • the DAB receiving portion has the above-mentioned schematic structure.
  • Fig. 2 is a flow chart for controlling the DAB indictor.
  • the foregoing flow chart is periodically executed after a power switch for the apparatus has been switched on until the power switch for the apparatus is switched off. That is, the DAB receiving portion is operated in accordance with the control of the power source which is performed by the system control unit 1 even in a period in which another source, such as the FM broadcast, is being selected.
  • the DAB receiving portion supplies, to the system control unit 1, information required to control the DAB indicator.
  • the system control unit 1 controls the power source for the DAB receiving portion to be turned on so as to turn on the DAB receiving portion. Then, the system control unit 1 determines whether or not the source selected by the user is the DAB (step S1). The selected source is the signal source which is selected by the selection means 2. When the DAB is set as the selected source, demodulated sound of the DAB receiving portion (an output of the musical decoder 15) is output from the speaker unit 4 through the selection means 2.
  • the determination is made in accordance with whether or not an error rate of the FIC portion of the signal received by the DAB receiving portion is lower than a predetermined value.
  • step S3 When the error rate of the FIC portion is lower than a predetermined value (step S2; reception permitted), a control signal for turning the DAB reception indicator is output to the display portion 6 (step S3).
  • the display portion 6 When the display portion 6 has received the control signal, the display portion 6 turns the DAB indicator in the display portion 6 on. As a result of the foregoing control, a fact that the ensemble, which is being received, has not been ended is announced to the user.
  • step S2 reception inhibited
  • step S4 reception inhibited
  • step S4 a control signal for turning the DAB indicator off is output to the display portion 6.
  • step S4 the display portion 6 turns the DAB indicator off (step S4).
  • the system control unit 1 determines whether or not the DAB ensemble can be received at the tuned frequency set before the switch of the source (step S5).
  • the system control unit 1 controls the DAB-FE (the front end for the DAB) 11 to change the frequency which must be received. Then, the system control unit 1 searches whether or not a DAB ensemble, which can be received, exists in a reception frequency band assigned to the DAB (step S6).
  • step S6 When a determination is made as a result of the search performed in step S6 that the ensemble, which can be received, exists, that is, when the error rate of the FIC portion of the received ensemble is lower than a predetermined value (step S7; exists), the operation is shifted to step S8 to turn the DAB receiving indicator on. As a result of the foregoing control, a fact that a DAB can be received at the present position is announced to the user.
  • step S7 If a determination is made that an ensemble which can be received in the reception frequency band (step S7; not exist) does no exist, the operation is shifted to step S9 to turn the DAB receiving indicator off. As a result of the foregoing control, a fact that the DAB cannot be received at the present position is announced to the user.
  • step S5 If a determination is made in step S5 that the DAB ensemble can be received at the tuned frequency set before switching of the source, also the operation of the system control unit 1 is shifted to step S8 to turn the DAB reception indicator on. As a result of the foregoing control, a fact that a DAB can be received at the present position is announced to the user.
  • step S1 the system control unit 1 does not perform a special process, such as the ensemble search which is performed in step S6.
  • a special process such as the ensemble search which is performed in step S6.
  • the reason for this lies in that when the selected source is the DAB, there is a possibility that the user maintains the frequency. Therefore, whether or not the search is performed must be decided by the user.
  • a user is able to easily detect whether or not the ensemble, which is being received, has been ended. If another signal source is being selected, the user is able to easily detect whether or not a digital broadcast can be received at the present position.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
EP99304209A 1998-05-28 1999-05-28 Empfänger für den Empfang von digitalen Rundfunkprogrammen (DAB), mit einem Wahlschalter zur Auswahl eines Tonsignals von mehreren Signalquellen Withdrawn EP0961431A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP16418698 1998-05-28
JP10164186A JPH11340857A (ja) 1998-05-28 1998-05-28 受信機

Publications (2)

Publication Number Publication Date
EP0961431A2 true EP0961431A2 (de) 1999-12-01
EP0961431A3 EP0961431A3 (de) 2001-10-24

Family

ID=15788339

Family Applications (1)

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EP99304209A Withdrawn EP0961431A3 (de) 1998-05-28 1999-05-28 Empfänger für den Empfang von digitalen Rundfunkprogrammen (DAB), mit einem Wahlschalter zur Auswahl eines Tonsignals von mehreren Signalquellen

Country Status (2)

Country Link
EP (1) EP0961431A3 (de)
JP (1) JPH11340857A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1172952A2 (de) * 2000-07-11 2002-01-16 Pioneer Corporation Empfänger für den Empfang von digitalen Rundfunksendungen mit einer Vorrichtung zur Erfassung der Bitfehlerrate und der Signalstärke der digitalen Rundfunkübertragungen
EP1191722A2 (de) * 2000-09-14 2002-03-27 Sony Corporation Gerät und Verfahren für den Empfang vom digitalen Hörfunk DAB
WO2003065624A1 (de) * 2002-02-01 2003-08-07 Robert Bosch Gmbh Rundfunkempfänger der anzeigt das ein digitales rundfunksignal empfangbar ist
US6980769B2 (en) 2003-05-19 2005-12-27 Visteon Global Technologies, Inc. Method for determining the validity of a radio station lookup table
US7043215B2 (en) 2003-05-19 2006-05-09 Visteon Global Technologies, Inc. Method of performing a fast tune for a digital broadcast station in a radio receiver
EP2091164A3 (de) * 2008-02-13 2010-07-14 Sony Corporation Funkempfangsvorrichtung und Ausgangswiederherstellungsverfahren

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US399132A (en) * 1889-03-05 Joseph it
DE3725487A1 (de) * 1987-07-31 1989-02-09 Irt Invent Res Tech Ag Verfahren zum empfangsseitigen auswerten einer innerhalb eines rundfunksignals uebertragenen digitalen information
US5001757A (en) * 1989-12-22 1991-03-19 Sprague Electric Company FM stereo tone detector
WO1992022154A1 (de) * 1991-06-05 1992-12-10 Deutsche Thomson-Brandt Gmbh Verfahren zur verarbeitung und wiedergabe empfangener digital codierter audio-daten und rundfunkempfänger zum empfang von digital codierten ton-rundfunkdaten (dab)
WO1993009615A1 (de) * 1991-11-01 1993-05-13 Telefunken Fernseh Und Rundfunk Gmbh Rundfunkübertragungssystem und rundfunkempfänger
EP0788251A2 (de) * 1996-02-05 1997-08-06 Alpine Electronics, Inc. Empfänger für den digitalen Tonrundfunk

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US399132A (en) * 1889-03-05 Joseph it
DE3725487A1 (de) * 1987-07-31 1989-02-09 Irt Invent Res Tech Ag Verfahren zum empfangsseitigen auswerten einer innerhalb eines rundfunksignals uebertragenen digitalen information
US5001757A (en) * 1989-12-22 1991-03-19 Sprague Electric Company FM stereo tone detector
WO1992022154A1 (de) * 1991-06-05 1992-12-10 Deutsche Thomson-Brandt Gmbh Verfahren zur verarbeitung und wiedergabe empfangener digital codierter audio-daten und rundfunkempfänger zum empfang von digital codierten ton-rundfunkdaten (dab)
WO1993009615A1 (de) * 1991-11-01 1993-05-13 Telefunken Fernseh Und Rundfunk Gmbh Rundfunkübertragungssystem und rundfunkempfänger
EP0788251A2 (de) * 1996-02-05 1997-08-06 Alpine Electronics, Inc. Empfänger für den digitalen Tonrundfunk

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LAAR VAN DE F ET AL: "TOWARDS THE NEXT GENERATION OF DAB RECEIVERS" EBU REVIEW- TECHNICAL, EUROPEAN BROADCASTING UNION. BRUSSELS, BE, no. 272, 21 June 1997 (1997-06-21), pages 46-59, XP000720136 ISSN: 0251-0936 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1172952A2 (de) * 2000-07-11 2002-01-16 Pioneer Corporation Empfänger für den Empfang von digitalen Rundfunksendungen mit einer Vorrichtung zur Erfassung der Bitfehlerrate und der Signalstärke der digitalen Rundfunkübertragungen
EP1191722A2 (de) * 2000-09-14 2002-03-27 Sony Corporation Gerät und Verfahren für den Empfang vom digitalen Hörfunk DAB
EP1191722A3 (de) * 2000-09-14 2004-07-14 Sony Corporation Gerät und Verfahren für den Empfang vom digitalen Hörfunk DAB
WO2003065624A1 (de) * 2002-02-01 2003-08-07 Robert Bosch Gmbh Rundfunkempfänger der anzeigt das ein digitales rundfunksignal empfangbar ist
US6980769B2 (en) 2003-05-19 2005-12-27 Visteon Global Technologies, Inc. Method for determining the validity of a radio station lookup table
US7043215B2 (en) 2003-05-19 2006-05-09 Visteon Global Technologies, Inc. Method of performing a fast tune for a digital broadcast station in a radio receiver
EP2091164A3 (de) * 2008-02-13 2010-07-14 Sony Corporation Funkempfangsvorrichtung und Ausgangswiederherstellungsverfahren

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Publication number Publication date
EP0961431A3 (de) 2001-10-24
JPH11340857A (ja) 1999-12-10

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