EP0788251A2 - Empfänger für den digitalen Tonrundfunk - Google Patents

Empfänger für den digitalen Tonrundfunk Download PDF

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Publication number
EP0788251A2
EP0788251A2 EP97101651A EP97101651A EP0788251A2 EP 0788251 A2 EP0788251 A2 EP 0788251A2 EP 97101651 A EP97101651 A EP 97101651A EP 97101651 A EP97101651 A EP 97101651A EP 0788251 A2 EP0788251 A2 EP 0788251A2
Authority
EP
European Patent Office
Prior art keywords
data
reception
warning
digital audio
audio broadcasting
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.)
Ceased
Application number
EP97101651A
Other languages
English (en)
French (fr)
Other versions
EP0788251A3 (de
Inventor
Kijuro Obata
Hiroyuki Nemoto
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.)
Alpine Electronics Inc
Original Assignee
Alpine Electronics Inc
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 Alpine Electronics Inc filed Critical Alpine Electronics Inc
Publication of EP0788251A2 publication Critical patent/EP0788251A2/de
Publication of EP0788251A3 publication Critical patent/EP0788251A3/de
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/26—Arrangements for switching distribution 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 audio broadcasting (DAB) receiver for receiving a digital audio broadcast and, more particularly, to a DAB receiver which warns a user when the user instructs the receiver to receive on a frequency different from the frequency of a signal which the receiver is presently receiving.
  • DAB digital audio broadcasting
  • DAB signals are transmitted, six to eight programs can be sent on one frequency carrier (ensemble). As a plurality of programs sent in this manner, data can be sent as well as ordinary music programs or the like. Accordingly, while music received on one frequency carrier is being heard, data can be received if the data is received on the same frequency carrier. Also, it is possible to start hearing a music program during reception of data.
  • Fig. 3 shows the relationship between two frequency carriers and a plurality of programs in DAB.
  • music programs PM11, PM12, PM13, ... and data PD11 can be received on frequency carrier f1 while music programs PM21, PM22, PM23, ... and data PD21 can be received on frequency carrier f2.
  • data PD11 can be received. Also, during reception of data PD11, it is possible to start hearing music program PM13 without stopping the operation of receiving data PD11.
  • the receiver is changed to start receiving music program PM21 (or data PD23) on the frequency carrier f2 during reception of data PD11 on the frequency carrier f1, then the flow of data PD11 received till the change is interrupted. That is, if, during reception of data on a frequency carrier, a user changes the receiver to receive a program on a different frequency carrier, the flow of data received till the change is interrupted. Moreover, the user is liable to be unaware of the interruption of the received data caused by the change to the program on the different frequency carrier.
  • an object of the present invention is to provide a DAB receiver in which during reception of data on a frequency carrier the flow of received data can be prevented from being interrupted when the receiver is changed to receive a program on a frequency carrier different from the frequency carrier on which the data is being received, the receiver being designed to achieve this function at a low cost.
  • a digital audio broadcasting receiver comprising data reception detection means for detecting a state where a predetermined kind of data is being received, and warning means for giving warning when an instruction is input to perform reception on a frequency different from the frequency of the signal presently received.
  • a DAB receiver R1 which represents an embodiment of the present invention has a DAB tuner section 10, a DAB signal processing section 20, an MPEG decoder 30, a D/A converter 40, a control section 50, keys 60, a buzzer 70, a display 80 and a connector C.
  • An apparatus 90 using data e.g., a personal computer or the like is connected to the DAB receiver R1 through the connector C.
  • the DAB tuner section 10 tunes in a predetermined frequency of a received signal on the basis of a frequency setting signal from the control section 50, and outputs the received signal.
  • the DAB signal processing section 20 outputs a sync signal and information on the composition of a program contained in the received signal to the control section 50, outputs an audio signal to the MPEG decoder 30 and also outputs received data.
  • Keys 60 include a key for instructing the receiver to change a received program, and a receiving frequency change key for receiving on a frequency different from the frequency on which the receiver is presently receiving (a key for instructing the receiver to receive on a frequency different from the frequency of a signal presently received).
  • the control section 50 operates for overall control of the DAB receiver R1, and determines completion of reception of a predetermined kind of data when it receives a data reception completion signal from the apparatus 90 after the start of reception of the data. If the receiving frequency change key in the keys 60 is operated before the control section 50 receives data reception completion signal from the apparatus 90 after the start of reception of the predetermined kind of data, the control section 50 sounds the buzzer 70 and makes on the display 80 a warning display for warning a user that reception of the data is uncompleted.
  • the control section 50 also comprises an example of means for giving warning about a start of reception of the predetermined kind of data when it detects the start of reception of the data.
  • the control section 50 detects the strength of a signal which is being received by the DAB tuner section 10. If the detected signal strength becomes small, the control section 50 calculates the error rate of the received data. If the error rate becomes equal to or lower than a predetermined rate, the control section 50 displays a received data error message "RECEIVED DATA ERROR" on the display 80 or both displays the received data error message and sounds the buzzer 70.
  • control section 50 displays on the display 80 a message "THERE IS A POSSIBILITY OF THE CONTENTS OF PRESENTLY RECEIVED DATA BEING LOST IF RECEPTION OF A PROGRAM ON A DIFFERENT FREQUENCY CARRIER IS STARTED DURING RECEPTION OF THE DATA" (S2), thereby provoking user's attention.
  • the key in keys 60 for inputting the instruction to change the received program is operated (S3) and if the reception of data is completed (S4), the receiver receives a new program selected by the user (S5).
  • the control section 50 informs the user of a start or completion of the reception of data by, for example, sounding the buzzer 70 when the reception of data is started or completed.
  • the control section 50 displays on the display 80 a message "DO YOU WANT TO CHANGE THE PROGRAM KNOWING THAT PRESENTLY RECEIVED DATA WILL BE LOST BY THE CHANGE ?" and sounds the buzzer 70 to warn the user (S13).
  • step 13 After warning in step 13, if a key in keys 60 with which a case where there is a need for continuing the reception of data is designated is operated (S21), the operation of changing the frequency carrier is inhibited (S23). Then the contents of service thereafter available are limited to those receivable on the present receiving frequency.
  • S24 When the reception of data presently performed is completed (S24), the inhibition of change of the frequency carrier is canceled, a message "PROGRAM CHANGE OK" is displayed and buzzer sound is generated (S25).
  • the above-described inhibition of change of the frequency carrier may be canceled if the signal strength of the station to which the receiver is presently tuned becomes small. That is, if the signal strength of the station which is broadcasting the presently received data becomes small, then an error can occur in the received data and there is a possibility of failure to receive the correct data. In such a situation, the error rate of the data presently received is detected and the inhibition of change of the frequency carrier is canceled if the error rate is equal to or lower than a predetermined rate. Simultaneously, a message "RECEIVED DATA ERROR", for example, is displayed on the display 80 and the buzzer 70 is energized to generate warning sound.
  • the receiver of the present invention may be also capable of receiving frequency-modulated (FM) broadcasts or amplitude-modulated broadcasts. Then the user may wants to make a forced change into FM receiving mode or AM receiving mode even during reception of data. In such a case, reception in FM receiving mode or AM receiving mode is started while reception of data by the DAB receiver is continued. Also, a message "DATA IS BEING RECEIVED" is displayed on the display 80 and the buzzer 70 is energized to generate warning sound.
  • FM frequency-modulated
  • AM amplitude-modulated
  • control section 50 comprises an example of data reception detection means for detecting a state where the predetermined kind of data is being received
  • keys 60 comprise an example of receiving frequency changing means for inputting an instruction to perform reception on a frequency different from the frequency of a signal which is presently being received
  • the buzzer 70 and the display 80 comprise an example of means for warning about an uncompleted state of reception of data when an instruction is input to perform reception on a frequency different from the frequency of a signal presently received.
  • keys 60 comprise an example of data reception continuation confirmation means for confirming a user's intention of continuing reception of data before the completion of reception of data and after this warning
  • the control section 50 comprises an example of receiving frequency change inhibition means for inhibiting change of the receiving frequency if a user's intention of continuing reception of data is confirmed before the completion of reception of data and after the warning.
  • the control section 50 also comprises an example of receiving frequency change inhibition cancellation means for canceling the inhibition of change of the receiving frequency when the continued reception of data is completed after the warning.
  • the buzzer 70 when the control section 50 detects a start or completion of reception of the predetermined kind of data, the buzzer 70 generates buzzer sound as a sign of the start or completion of reception of the data.
  • the arrangement may alternatively be such that a message expressing the start or completion is displayed on the display 80 or both the buzzer 70 and the display 80 are used.
  • a portion of the display 80 or an indicator such as a light emitting diode may be used by being lighted continuously or by being turned on and off.
  • both the buzzer 70 and the display 80 may be used.
  • keys 60 may include a frequency change inhibition key for inhibiting change of the frequency carrier during reception of data, and the operation of changing the frequency carrier may be inhibited during reception of data by operating this key.
  • the flow of received data can be prevented from being interrupted when the receiver is changed to receive a program on a frequency carrier different from the frequency carrier on which the data is being received, and means for this prevention can be realized at a low cost.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
EP97101651A 1996-02-05 1997-02-03 Empfänger für den digitalen Tonrundfunk Ceased EP0788251A3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP8042099A JPH09214379A (ja) 1996-02-05 1996-02-05 多重放送受信機
JP4209996 1996-02-05
JP42099/96 1996-02-05

Publications (2)

Publication Number Publication Date
EP0788251A2 true EP0788251A2 (de) 1997-08-06
EP0788251A3 EP0788251A3 (de) 2000-05-24

Family

ID=12626552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97101651A Ceased EP0788251A3 (de) 1996-02-05 1997-02-03 Empfänger für den digitalen Tonrundfunk

Country Status (2)

Country Link
EP (1) EP0788251A3 (de)
JP (1) JPH09214379A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19943475C1 (de) * 1999-09-10 2001-06-21 Am3 Automotive Multimedia Ag Verfahren und Vorrichtung zum Betrieb eines digitalen Rundfunkempfängers
EP0961431A3 (de) * 1998-05-28 2001-10-24 Pioneer Electronic Corporation Empfänger für den Empfang von digitalen Rundfunkprogrammen (DAB), mit einem Wahlschalter zur Auswahl eines Tonsignals von mehreren Signalquellen
WO2003065624A1 (de) * 2002-02-01 2003-08-07 Robert Bosch Gmbh Rundfunkempfänger der anzeigt das ein digitales rundfunksignal empfangbar ist
GB2410633A (en) * 2004-01-29 2005-08-03 Imagination Tech Ltd Broadcast receiver with user audio interface

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3496468B2 (ja) 1997-08-08 2004-02-09 日産自動車株式会社 内燃機関の蒸発燃料濃度判定装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI96555C (fi) * 1994-06-16 1996-07-10 Nokia Technology Gmbh Digitaalinen yleislähetysjärjestelmä ja järjestelmässä käytettäväksi tarkoitettu vastaanotin
FI942971A0 (fi) * 1994-06-20 1994-06-20 Nokia Technology Gmbh Foerfarande foer vaexling av signalkaelle i mottagaren i ett digitalt universalsaendningssystem, samt mottagare foer digitalt universalsaendningssystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"RADIO BROADCASTING SYSTEMS; DIGITAL AUDIO BROADCASTING (DAB) TO MOBILE, PORTABLE AND FIXED RECEIVERS", ETS 300 401, XX, XX, 1 February 1995 (1995-02-01), pages 1 - 206, XP000668972 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0961431A3 (de) * 1998-05-28 2001-10-24 Pioneer Electronic Corporation Empfänger für den Empfang von digitalen Rundfunkprogrammen (DAB), mit einem Wahlschalter zur Auswahl eines Tonsignals von mehreren Signalquellen
DE19943475C1 (de) * 1999-09-10 2001-06-21 Am3 Automotive Multimedia Ag Verfahren und Vorrichtung zum Betrieb eines digitalen Rundfunkempfängers
WO2003065624A1 (de) * 2002-02-01 2003-08-07 Robert Bosch Gmbh Rundfunkempfänger der anzeigt das ein digitales rundfunksignal empfangbar ist
GB2410633A (en) * 2004-01-29 2005-08-03 Imagination Tech Ltd Broadcast receiver with user audio interface

Also Published As

Publication number Publication date
JPH09214379A (ja) 1997-08-15
EP0788251A3 (de) 2000-05-24

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