EP0986199B1 - Empfänger für den Empfang von digitalen Rundfunkprogrammen DAB - Google Patents

Empfänger für den Empfang von digitalen Rundfunkprogrammen DAB Download PDF

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Publication number
EP0986199B1
EP0986199B1 EP19990307160 EP99307160A EP0986199B1 EP 0986199 B1 EP0986199 B1 EP 0986199B1 EP 19990307160 EP19990307160 EP 19990307160 EP 99307160 A EP99307160 A EP 99307160A EP 0986199 B1 EP0986199 B1 EP 0986199B1
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European Patent Office
Prior art keywords
program
received
service
programs
digital audio
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.)
Expired - Lifetime
Application number
EP19990307160
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English (en)
French (fr)
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EP0986199A2 (de
EP0986199A3 (de
Inventor
Akiko c/o Sony Corporation Tamura
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Sony Corp
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Sony Corp
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Publication of EP0986199A2 publication Critical patent/EP0986199A2/de
Publication of EP0986199A3 publication Critical patent/EP0986199A3/de
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Publication of EP0986199B1 publication Critical patent/EP0986199B1/de
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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
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/57—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for mobile receivers
    • 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
    • H04H60/38—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

  • This invention relates to a receiver for receiving digital audio broadcasts.
  • DAB digital audio broadcasting conforming to Eureka 147 Standard
  • the DAB employs 1.5 MHz transmission band width, OFDM (orthogonal frequency division multiplex) modulation system, and MPEG audio layer II for data compression of audio signals and can broadcast a maximum of 64 programs of digital audio signal and digital data.
  • the DAB uses 1.5 MHz transmission band for 1 channel as described herein above, the channel is called “ensemble”, and the ensemble is tuned by tuning to the center frequency of this ensemble.
  • the ensemble is divided into groups called "service".
  • the ensemble is divided into four services.
  • a service corresponds to one general FM broadcasting station, and a service is further divided into several "service components", each service component corresponds to one digital audio signal or digital data.
  • a service component is added with codes called "sub-channel ID” namely codes SCID 01 to SCID 15 in the case shown in FIG. 5 to identify the service component.
  • Receivers for receiving such digital audio broadcasts are known and typically include a control section comprised of a microcomputer and an operation section capable of selectively receiving the service components (programs).
  • EP-A-0,881,792 which forms part of the state of the art under Article 54(3) EPC discloses a receiver for receiving digital audio broadcasting in which a plurality of programs are broadcast through a single transmission band and the type of the programs is identified by a PTY code.
  • the digital audio broadcasting receiver comprises a control section comprised of a microcomputer, as well as a scanning operation section and a scanning stop operation section in the form of a program selection key.
  • the scanning operation section causes received programs of a desired type, as identified by the PTY code, to be selected in sequence and the selected programs are each received for a designated time.
  • the program section key is operated while an arbitrary program is being received, that arbitrary program is selected to be received subsequently.
  • a receiver for receiving digital audio broadcasts in which a plurality of programs are broadcast through a single transmission band with said plurality of programs being classified into a plurality of groups
  • said digital audio broadcasting receiver comprising a control section comprised of a microcomputer, and characterized by further comprising a scanning operation section and a scanning stop operation section which are connected to said control section, the scanning operation section having a mode of operation in which one program only in each of said groups is selected in sequence from each of said groups and the selected programs are received respectively for a designated time, and when said scanning stop operation section is operated while an arbitrary program of said plurality of programs is being received, said arbitrary program is selected to be received subsequently.
  • a broadcast wave signal of DAB is received by antenna 11, the received signal is supplied to a superheterodyne type tuner circuit 12 and converted to an intermediate frequency signal, and the intermediate frequency signal is supplied to an A/D converter circuit 13 to generate a digital signal.
  • the digital signal is supplied to an orthogonal demodulation circuit 14 to demodulate the same phase component (real axis) and orthogonal component (imaginal axis), these data are supplied to an FFT (fast Fourier transform) circuit 15 for complex Fourier transformation to generate frequency component for each symbol, the output is supplied to a Viterbi decoder circuit 16 for deinterleaving and error correction and selecting a program (service component) to select a digital audio data of a desired program.
  • an orthogonal demodulation circuit 14 to demodulate the same phase component (real axis) and orthogonal component (imaginal axis)
  • FFT fast Fourier transform
  • the selected data is supplied to an audio decoder 17 for performing decoding processing such as MPEG data expansion, and the decoder circuit 17 generates the digital audio data of a desired program.
  • the generated digital audio data is supplied to a D/A converter circuit 18 to D/A-convert to an analogue audio signal, and the audio signal is supplied to a speaker 21 by way of an amplifier 19.
  • a synchronizing circuit 31 comprising, for example, DSP performs AFC of the tuner circuit 12, and performs processing such as synchronization in the FFT circuit 15.
  • a control section that is, a microcomputer 32 is provided for system controlling to thereby take access to predetermined signal between the synchronizing circuit 31 and Viterbi decoder circuit 16 and audio decoder circuit 17, and selection of reception frequency (ensemble) in the tuner circuit 12 is performed by way of the synchronizing circuit 31.
  • operation means 33 comprising various operational keys such as a menu key, selection keys, an introduction scanning introduction scanning stop key, and an introduction time setting key as input means is connected to the microcomputer 32, and, for example, a display element 34 comprising an LCD is also connected to the microcomputer 32.
  • the Viterbi decode circuit 16 selects the program by way of the microcomputer 32, the audio signal of the program is supplied to the speaker 21, thus the program can be listened to. At that time, the display element 34 displays the information on the selected program.
  • program selection routines 100 to 300 as shown in FIG. 2 to FIG. 4 are ready for use in the microcomputer 32 as a part of the program executed in the microcomputer 32, and the selection of a program is realized by any one of selection modes 1 to 3.
  • the case in which an ensemble of the program content shown in FIG. 5 is received is described herein under.
  • this mode when this mode is implemented during listening to a program 1B in the active state of the receiver, the program is selected in the order from program 2A, program 3A, program 4A, and to program 1A, and these programs are received (reproduced) and changed for, for example, 10 seconds for each program.
  • program 3A is received continuously.
  • service components of the minimum sub-channel ID out of respective services are selected and received for a predetermined amount of time for each service component successively (introduction scanning operation), and when the introduction scanning introduction scanning stop key of the operation means 33 is operated during reception of an arbitrary program, the service component (program) which is being received, that is, program 3A in this case is listened to continuously.
  • the menu key of the operation means 33 when the menu key of the operation means 33 is pressed, the menu which indicates names of processing or function is displayed on the display element 34, and if "introduction function" is selected from among names, then item names “service mode”, “component mode”, and “all mode” are displayed.
  • processing of the microcomputer 32 starts from step 101 of the routine 100, and the number of services included in the ensemble which is now being received is counted in the next step 102.
  • step 111 the first service component next to the service including the service component which is received until now is selected and received.
  • program 1B is being received and the service which includes program 1B is the service 1
  • the next service is the service 2 and the first service component is the service component 2A, therefore program 2A is scanned and selected.
  • the service next to the service 4 which is the last service is the service 1.
  • step 112 whether the amount of time set by a user previously, or 10 seconds has passed after the service component which is now being received is selected is checked, if the check result is NO, the processing proceeds to step 113 from step 112. It is checked whether the introduction scanning stop key of the operation means 33 is pressed in step 113, and if the check result is NO, the processing returns to step 112 from step 113.
  • steps 112 and 113 are repeated after that time, the service component which is now being received is received at longest for, 10 minutes from selection of this service component.
  • step 112 If 10 seconds has passed without the stop pressed, it is detected in step 112, the processing proceeds to step 114 from step 112, and whether the first service component has been received is checked for all the services counted in step 102, that is in this case, whether all the programs 1A to 4A are received is checked.
  • step 114 the service component is switched to the first service component of the next service as described herein above and received.
  • the introduction scanning stop key is not pressed, the first service components of respective services are received for, for example, 10 seconds each successively as shown with the arrow 1.
  • step 113 If the first service component of any one of services is received (at that time, steps 112 and 113 are repeated) and the introduction scanning stop key is pressed, then it is detected in step 113, and the processing proceeds to step 129 from step 113 and is brought to an end of the routine 100. Therefore, after that time, the program (service component) which is being received when the introduction scanning stop key is pressed is received continuously.
  • step 114 If it is detected that the first service components of all the services are received in step 114, the processing proceeds to step 121 from step 114, the service component which has been received before the routine 100 is implemented in step 121, namely program 1B in this case, is selected and received, and thereafter the routine 100 is brought to and end at step 129. Therefore if the first service component of any service is not selected, the processing is returns to reception of the original program.
  • the first programs (service components) of respective services can be listened to for, for example, 10 minutes each, and when the introduction scanning stop key is pressed during listening to the program which the user want to listen to, the program can be listened to continuously after that time.
  • each program can be received for ten minutes.
  • the user can set this reception time with the introduction time setting key in the range from the shortest time when the user can check the contents of each program, for example, 3 seconds to the time when the user can sufficiently check the contents of each program, for example, 20 seconds or so.
  • this mode is implemented when, for example, program 1B is listened to, then as shown in FIG. 5 with the arrow 2, the program is selected in the order from program 1C, program ID, program 1E, and to program 1A and respective programs are received (reproduced) for, for example, 10 seconds each.
  • program 3E When the introduction scanning stop key is pressed during reception of, for example, program 3E, program 3E are received continuously after that time.
  • service components are selected successively and received for a predetermined amount of time each in the service which has been received until now, and when a predetermined key is operated during reception, the service component which is being received at that time is received continuously after that time.
  • step 211 the service component next to the service component which has been received until that time is selected and received.
  • program 1B is being received, and the next service component is the service component 1C, therefore program 1C is selected and received.
  • the service component next to the service component 1E is regarded as the service component 1A. Namely, the service component next to the last service component is regarded as the first service component.
  • step 212 whether, for example, 10 seconds has passed after the service component which is now being received is selected is checked, and if the check result is NO, the processing proceeds to step 213 from step 212, and it is checked whether the introduction scanning stop key of the operation means 33 is pressed in step 213, and if the check result is NO, the processing returns to step 212 from step 213.
  • steps 212 and 213 are repeated after that, the service component which is being received now is received at longest for, for example, 10 seconds after the service component is selected.
  • step 212 If 10 seconds has passed without the introduction scanning stop key pressed, it is detected in step 212, the processing proceeds to step 214 from step 212, and whether all the service components counted in step 202 are received is checked, in this case whether all the programs 1A to 1E are received is checked.
  • step 214 the service component is switched to the service component of the next service as described herein above and received.
  • step 213 If the introduction scanning stop key is pressed during reception of any one of service components (at that time steps 212 and 213 are repeated), then it is detected in step 213, and the processing proceeds to step 229 from step 213 and the routine 200 is brought to an end. Therefore, the program (service component) which is being received when the introduction scanning stop key is pressed is received continuously after that time.
  • step 214 If it is detected that the service components of all the services are received in step 214, then the processing proceeds to step 221 from step 214, and the service component which has been received before the routine 200 is implemented, in this case program 1B, is selected and received, and thereafter the routine 200 is brought to an end at the step 229. Therefore, if any one of all service components of the service which is being received is not selected, then the processing returns to the reception of the original program.
  • all the service components are received for a predetermined amount of time each with changing the service component from the service component next to the service component which is being received at that time in the order of sub-channel ID for a predetermined amount of time each, and when a predetermined key is operated during reception of a service component, the service component which is being received at that time is received continuously after that time.
  • step 311 the first service component of the service next to the service including the service component which is being received until that time is selected and received.
  • the program 1B is being received
  • the service which includes program 1B is the service 1
  • the next service is the service 2
  • the first service component of the service 2 is the service component 2A, therefore program 2A is selected and received.
  • step 312 the processing proceeds to step 312, and the number of service components included in the service which is being received now is counted. Subsequently, the processing proceeds to step 313, it is checked whether, for example, 10 seconds has passed from selection of the service component which is now being received, and if the check result is NO, the processing proceeds to step 314 from step 313. It is checked whether the introduction scanning stop key of the operation means 33 is pressed in step 314, and if the check result is NO, the processing returns to step 313 from step 314.
  • steps 313 and 314 are repeated after that time, the service component is received for at longest, for example, 10 seconds from the time when the service component which is now being received is selected.
  • step 313 If 10 seconds has passed without the introduction scanning stop key pressed, it is detected in step 313, then the process proceeds to step 315 from step 313, and it is checked whether all the service components which have been counted in step 312 are received, in this case whether all the programs 2A to 2C are received.
  • step 316 the service component next to the service component which has been received until that time is selected and received.
  • program 2A is being received and the next service component is the service component 2B, therefore program 2B is selected and received. Thereafter, the processing returns to step 313.
  • step 314 If the introduction scanning stop key is pressed during reception of any service component (at that time steps 313 and 314 are repeated), it is detected in step 314, then the processing proceeds to step 329 from step 314, and the routine 300 is brought to an end. Accordingly, the program (service component) which is being received at the time when the introduction scanning stop key is pressed is received continuously after that time.
  • step 315 if it is detected that all the service components in the service which is being received are received in step 315, then the processing proceeds to step 317 from step 315, whether, for example, the first service components in all the services counted in step 302 are received, in this case whether all the programs 1A to 4A are received, is checked.
  • step 311 If it is detected that the first service components of all the services are not received, then the processing returns to step 311 from step 317, the service component is switched to the first service component of the next service and received.
  • the introduction scanning stop key is not pressed, then the service is changed successively, and all the service components in the service are received successively for, for example, 10 seconds for each service.
  • step 317 If the first service components in all the services counted in step 302 are received in step 317, then the processing proceeds to step 321 from step 317, and the service component which has been received in step 321 until the time when the routine 300 is implemented, in this case program 1B, is selected and received, thereafter the routine 300 is brought to an end at step 329. Therefore, if any one of all the service components in the service which is being received is not selected, then the processing returns to the reception of the original program.
  • the program is not only selected and received by general key operation but also selected and received additionally by service mode, component mode, or all mode.
  • service mode, component mode, or all mode the respective programs are received for, for example, 10 seconds each, and the introduction scanning stop key may be pressed when a favorite program is being listened to.
  • a preferable program is selected and received simply with less key operation. Because it is not necessary to see the display element 34 when a program is selected, safety is secured in the case that a program is selected and listened to during car driving.
  • n-th service components of respective services are selected successively and received for 10 seconds each. At that time, if there is no n-th service component in a service, then the selection and reception of the service component are skipped, or otherwise the service component having the maximum sub-channel ID in the service may be selected and received.
  • the all mode is implemented when, for example, program 1B is listened to, the program is selected successively in the order from program 2A, ⁇ ... ⁇ program 2C ⁇ program 3A ⁇ ... ⁇ program 3E ⁇ program 4A ⁇ program 4B ⁇ program 1A ⁇ ... ⁇ program 1E and received for 10 seconds each, however otherwise, the program is selected in the order of sub-channel ID, namely from program 1C ⁇ ... program 1E ⁇ program 2A ⁇ ... ⁇ program 2C ⁇ program 3A ⁇ ... ⁇ program 3E ⁇ program 4A ⁇ program 4B ⁇ program 1A ⁇ ... program 1E, and received for 10 seconds each.
  • the operation returns to the original program, however otherwise, the selection and reception of the service component may be continued for 2 cycles or more or a predetermined amount of time.
  • a preferred program is selected and listened to simply with less operation. Furthermore, because it is not necessary to see the display, safety is secured when a program is selected and listened to while driving a car.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)

Claims (5)

  1. Empfänger zum Empfang digitalen Audiorundfunks, bei dem mehrere Programme durch ein einzelnes Übertragungsband rundgesendet werden, wobei die mehreren Programme in mehrere Gruppen klassifiziert sind, wobei der Digitalaudiorundfunkempfänger einen aus einem Mikrocomputer bestehenden Steuerungsabschnitt (32) aufweist,
    gekennzeichnet durch einen Abtastbetriebsabschnitt (12-18) und einen Abtaststoppbetriebsabschnitt (33), die mit dem Steuerungsabschnitt (32) verbunden sind, wobei der Abtastbetriebsabschnitt (12-18) einen Betriebsmodus aufweist, bei dem nur ein Programm in jeder der Gruppen aus jeder der Gruppen in Folge ausgewählt wird und die ausgewählten Programme jeweils für eine bestimmte Zeit empfangen werden, und, wenn der Abtaststoppbetriebsabschnitt (33) betrieben wird, während ein beliebiges Programm der mehreren Programme empfangen wird, das beliebige Programm ausgewählt wird, um danach empfangen zu werden.
  2. Digitalaudiorundfunkempfänger nach Anspruch 1, wobei der Abtastbetriebsabschnitt (12-18) einen weiteren Betriebsmodus aufweist, bei dem jedes Programm in der Gruppe, die das während des Betriebs des Abtastbetriebsabschnitts (12-18) rundgesendete Programm aufweist, in Folge ausgewählt und für eine bestimmte Zeit empfangen wird, und, wenn der Abtaststoppbetriebsabschnitt (33) betrieben wird, während ein beliebiges Programm der mehreren Programme empfangen wird, das beliebige Programm ausgewählt wird, um danach empfangen zu werden.
  3. Digitalaudiorundfunkempfänger nach Anspruch 1 oder 2, wobei der Abtastbetriebsabschnitt (12-18) einen weiteren Betriebsmodus aufweist, bei dem alle der mehreren Programme in Folge ausgewählt und für jeweils einer bestimmten Zeit empfangen werden, und, wenn der Abtaststoppbetriebsabschnitt (33) betrieben wird, während ein beliebiges Programm der mehreren Programme empfangen wird, das beliebige Programm ausgewählt wird, um danach empfangen zu werden.
  4. Digitalaudiorundfunkempfänger nach einem der vorhergehenden Ansprüche, wobei der Zeitbetrag, für den jedes Programm ausgewählt und empfangen wird, von einem Benutzer einstellbar ist.
  5. Digitalaudiorundfunkempfänger nach einem der vorhergehenden Ansprüche, wobei der digitale Audiorundfunk DAB ist,
    das Übertragungsband ein Ensemble ist,
    die Gruppe ein Dienst ist, und
    das Programm eine Dienstkomponente ist.
EP19990307160 1998-09-09 1999-09-09 Empfänger für den Empfang von digitalen Rundfunkprogrammen DAB Expired - Lifetime EP0986199B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10255577A JP2000091934A (ja) 1998-09-09 1998-09-09 デジタル音声放送の受信機
JP25557798 1998-09-09

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EP0986199A2 EP0986199A2 (de) 2000-03-15
EP0986199A3 EP0986199A3 (de) 2003-06-25
EP0986199B1 true EP0986199B1 (de) 2006-08-09

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DE (1) DE69932681T2 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001059943A1 (fr) * 2000-01-28 2001-08-16 Kabushiki Kaisha Kenwood Recepteur de radiodiffusion numerique
KR100651939B1 (ko) * 2004-08-18 2006-12-06 엘지전자 주식회사 방송 수신기 및 디코딩 방법

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Publication number Priority date Publication date Assignee Title
JP3034908B2 (ja) * 1990-05-18 2000-04-17 パイオニア株式会社 ラジオ受信機のプリセット・スキャン方式
JPH10327111A (ja) * 1997-05-26 1998-12-08 Alpine Electron Inc Ｄａｂ受信機の番組受信方法

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DE69932681D1 (de) 2006-09-21
JP2000091934A (ja) 2000-03-31
EP0986199A2 (de) 2000-03-15
EP0986199A3 (de) 2003-06-25
DE69932681T2 (de) 2007-08-02

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