EP2255468A2 - Rundfunkempfänger mit doppeltuner und alternativer frequenzwahl durch vergleich der rds identifikationskodes - Google Patents
Rundfunkempfänger mit doppeltuner und alternativer frequenzwahl durch vergleich der rds identifikationskodesInfo
- Publication number
- EP2255468A2 EP2255468A2 EP09721898A EP09721898A EP2255468A2 EP 2255468 A2 EP2255468 A2 EP 2255468A2 EP 09721898 A EP09721898 A EP 09721898A EP 09721898 A EP09721898 A EP 09721898A EP 2255468 A2 EP2255468 A2 EP 2255468A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- predetermined
- reception frequency
- frequency
- reception
- 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
Links
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
- H04H2201/13—Aspects of broadcast communication characterised by the type of broadcast system radio data system/radio broadcast data system [RDS/RBDS]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/60—Aspects of broadcast communication characterised in that the receiver comprises more than one tuner
Definitions
- the invention relates to a method for operating a radio system and a radio system.
- Radio systems are used, inter alia, in modern motor vehicles and are preferably designed to receive data from a radio data system (RDS).
- RDS radio data system
- additional information can be received on the currently received radio program.
- the additional information includes, for example, information about a program service name of the radio program or alternative reception frequencies.
- the RDS data is periodically broadcast by transmitting stations and preferably includes a program identification associated with the currently received radio program. By means of the program identification, a radio broadcasting station and its radiated radio program can be identified.
- the object on which the invention is based is to specify a method for operating a radio system and a radio system which enables reliable identification of radio programs.
- the first receiving unit is designed to provide a first data signal on the output side as a function of an input signal applied on the input side and a predetermined first receiving frequency.
- the second receiving unit is designed, depending on the input side given predetermined received signal and a predetermined second receiving frequency on the output side to provide a second data signal.
- a signal pattern of the first data signal present on the input side is compared with signal patterns of a plurality of predetermined identification codes, which are assigned to a predetermined alternative frequency of the second reception frequency. Depending on the comparison, that identification code is assigned to the first reception frequency whose signal pattern has the greatest agreement with the signal pattern of the first data signal.
- the first reception frequency is specified as an alternative to the second reception frequency.
- the second receiving frequency is assigned a currently received radio program.
- the predetermined identification codes that are compared are each assigned to a predetermined alternative frequency of the second reception frequency.
- a predetermined alternative frequency is typically associated with a plurality of identification codes.
- the first data signal is typically disturbed or noisy and includes a previously unknown identification code.
- the reception frequency assigned to the data signal can also be used as the alternative frequency of the currently received radio program.
- the first reception frequency is specified as a new second reception frequency depending on a comparison of a first reception quality, which is assigned to the first reception frequency, with a second reception quality, which is assigned to the second reception frequency. The consideration of the respective reception quality allows a particularly reliable reception of a given radio program.
- the first reception frequency is specified as a new second reception frequency as soon as the value of the first reception quality is higher than the value of the second reception quality.
- the second reception frequency is changed only when the first reception frequency has a higher reception quality. This ensures that only alternative frequencies are used, to which a higher reception quality is assigned, than that of the currently received reception frequency.
- noise margins are calculated and assigned to the first reception frequency depending on the interference distances of the identification code.
- Signal-to-noise ratio of a given received signal represents such.
- a predetermined identification code can be assigned particularly reliable. The greater the value of the signal-to-noise ratio, the greater the probability of a match of the identification code of the first data signal with the respective predetermined identification code.
- the radio system comprises a memory which is designed to store predefined identification codes with the respectively assigned at least one alternative frequency and which provide supply identification codes to the at least one signal filter unit.
- the memory is designed as a non-volatile memory, so that already known identification codes for reliable detection of previously unknown identification codes and for a radio program list can be used.
- the memory is designed as a database system.
- Database systems allow particularly fast access to the identification codes or alternative frequencies.
- the comparison of the identification codes by means of signal-matched filter units.
- Signal matched filters may also be referred to as correlation filters, and are particularly suitable for providing an output representative of a degree of coincidence of the two signal patterns.
- the first and second data signal represent a data signal of a radio data system.
- Data of the radio data system are preferably digital and can therefore be processed particularly easily.
- the respective identification code represents a respective program identification of the radio data system.
- the invention is characterized by a method for operating a radio system and a radio system with at least one receiving unit, which is designed for this purpose is, depending on an input side applied predetermined received signal and a predetermined receiving frequency on the output side to provide a data signal.
- a signal pattern of the input signal applied to the input signal is compared with signal patterns of a plurality of predetermined identification codes which are assigned to the predetermined reception frequency.
- that identification code is assigned to the predetermined reception frequency whose signal pattern has the greatest agreement with the signal pattern of the data signal.
- a radio program that is assigned to the second data signal can be reliably identified.
- the reception frequency is marked as receivable as soon as it is associated with an identification code.
- a predetermined identification code which is associated with at least one reception frequency marked receivable, is assigned to a radio program list via which a radio program assigned to the identification code can be displayed.
- a radio program list via which a radio program assigned to the identification code can be displayed.
- Figure 1 is a schematic representation of a radio system.
- FIG. 1 schematically shows a radio system, as it can be used preferably in motor vehicles.
- Modern radio systems in motor vehicles are preferably designed to receive received signals of a radio data system (RDS).
- RDS radio data system
- the RDS is standardized under DIN EN 62106 and can be received Europe-wide.
- additional information is essentially transmitted to the currently received radio program, which includes, for example, alternative frequencies which are assigned to the currently received radio program.
- Alternative frequencies are assigned to predetermined transmitting stations, which also broadcast the currently received radio program.
- the reception frequency of the currently received radio program can be changed so that always the reception frequency is selected, which has the highest reception quality at the current location of the motor vehicle. This is particularly advantageous if, while driving, a transmission range of a transmitter that transmits the currently received radio program is exited and the transmission range of a new transmitter is traversed, which also transmits the currently received radio program, but at an alternative reception frequency.
- the radio system can alternatively be configured to receive received signals, for example, an IBOC system or a DRM simulcast system, analogous to the radio data system as
- Hybrid systems are formed and digital accompanying information to the audio signal include.
- Radio data system explains the operation of the radio system.
- the radio system comprises an antenna ANT, by means of which a received signal S_REC can be received.
- the received signal S_REC is assigned essentially all radio signals of different reception frequencies that can be received at the current location of the motor vehicle.
- the antenna ANT can be followed by a bandpass filter, which is permeable only to receive signals of a predetermined reception frequency range of, for example, 87 to 108 MHz. All received signals outside the specified receiving frequency range are filtered out.
- the received signal S REC received by means of the antenna ANT is fed to the input side of a first receiving unit REC1 and a second receiving unit REC2.
- the first and second receiving units REC1 and REC2 are arranged electrically in parallel.
- the first receiving unit REC1 is preferably designed to receive digital data and preferably comprises a first channel filter CF1, to the input side of the received signal S REC is supplied. Furthermore, a first control signal S_F1, which predefines a first receive frequency fl, is fed to the first channel filter CF1 on the input side.
- the first channel filter CF1 is designed to provide on the output side, depending on the received signal S REC and the specification of the first receiving frequency f1, a first received signal S_REC1 having the first receiving frequency f1 of a first signal processing unit DDEM1 on the input side.
- the first signal processing unit DDEM1 preferably comprises a data demodulator and a bit decoder.
- a carrier signal having a frequency of, for example, 57 kHz is separated from the first received signal S REC1 present on the input side.
- the carrier signal is preferably associated with the radio data system and includes the information of the RDS signal.
- the information of the RDS signal is separated from the carrier signal and then supplied to the bit decoder.
- the bit decoder is designed to generate from the separated signal of the demodulator a digital first data signal S_BIT1 designed as a bit pattern which comprises and represents the information of the radio data system.
- the first data signal S BIT1 is supplied to an input selector switch SW.
- the second receiving unit REC2 By means of the second receiving unit REC2 the radio program is received, which the user of the radio system has predetermined by means of the specification of the second reception frequency f2.
- the second receiving unit REC2 preferably comprises a first receiving path, which is preferably designed to receive analog data, and a second receiving path, which is preferably designed to receive digital data. Both receive paths are assigned a second channel filter CF2 and a second demodulator DEM.
- the second channel filter CF2 is designed analogously to the first channel filter CF1, with the difference that it is given a second reception frequency f2 by means of a second control signal S_F2.
- the second channel filter CF2 provides a second received signal S REC2 with the second receiving frequency f2 to the second demodulator DEM.
- the second demodulator DEM is analogous to the first demodulator, with the difference that here a second analog receive signal
- S AREC2 and a second digital reception signal S DREC2 are separated from the second reception signal S_REC2.
- the first receive path, the second analog receive signal S_AREC2 is supplied on the input side and the second receive path, the second digital receive signal S_DREC2 is supplied on the input side.
- the second reception path is assigned a second signal processing unit DDEM2, which comprises a further bit decoder, and a data processing unit SYNC.
- the data processing unit SYNC comprises, for example, means for data synchronization, for checking the data integrity and at least one data interpreter.
- the further bit decoder is designed analogously to the bit decoder of the first signal processing unit DDEM1 and provides the input selector switch SW and the data processing unit SYNC on the input side with a second data signal S_BIT2, which provides the information of the digital accompanying signal, such. B. the RDS signal, which is associated with the second reception frequency f2.
- the second signal processing unit DDEM2 the digital received signals of the currently received radio program are processed such that, for example, the user additional information, such. B. program service name of the radio program to be displayed.
- the analog receiving path of the second receiving unit REC2 preferably has an analog processing unit ADEM with a stereo decoder and an audio processing unit, such. As an audio amplifier, on.
- ADEM analog processing unit
- an audio processing unit such as an audio amplifier
- the analog audio signals are processed such that they can be supplied to the loudspeakers SP and thus the user of the radio system can listen to the currently received radio program.
- the first and second data signal S_BIT1 and S_BIT2 each preferably comprise four data blocks which are periodically, so z. B. 10 times in one second, be made available by means of the radio data system.
- the four data blocks each comprise 104 data bits, each data block having 26 data bits each.
- the 26 data bits preferably divide into 16 payload data bits and 10 check data bits.
- the data blocks of the radio data system for example, information for identifying the currently received radio program is transmitted, information about the radio service name, a list of alternative frequencies, by means of which a radio program identical to the currently received radio program can be received.
- the first and second data signal S BIT1 and S BIT2 can also be different be formed, in particular, when other than the radio data system is received by means of the radio system.
- the input selector switch SW is preferably arranged on the input side between the bit decoder of the first and second receiving units REC1 and REC2 and on the output side of a first signal filter unit MF1 and a second signal filter unit MF2.
- the first and second signal filter units MF1 and MF2 are preferably arranged electrically in parallel.
- a drive signal S_SW the input selector switch SW can be controlled. In a first switching position, the latter assigns the first data signal S BIT1 to the first and second signal filter units MF1 and MF2. In a second switching position, the input selector switch SW assigns the second data signal S_BIT2 to the first and second signal filter units MF1 and MF2.
- a program identification assigned to the radio program is received by means of the RDS signal, which is assigned to the radio program, which is stored in the memory MEM.
- the program identification is, for example, a 16-bit value and preferably assigned to the first data block of the respective RDS signal and thus of the first or second data signal S BIT1 or S BIT2.
- alternative frequencies are received, which is associated with the program identification.
- the alternative frequencies include reception frequencies by means of which a radio program identical to the currently received radio program can be received.
- the program identification and the at least one alternative frequency assigned to it are fed by means of the feedback signal S FB from the data processing unit SYNC of the second receiving unit REC2 to a control unit CTRL.
- the control unit CTRL is adapted to the program identification and the at least one alternative frequency of the currently received radio program store in the memory MEM, if they have not yet been stored. Furthermore, an alternative frequency of the currently received radio program can be supplied to the control unit CTRL by means of the feedback signal S_FB.
- the control unit CTRL is further configured to determine, depending on the alternative frequency in the memory MEM, at least one program identification assigned to the alternative frequency, which program is subsequently supplied to the first and / or the second signal filter unit MF1 and / or MF2.
- Different broadcast stations of radio programs can each radiate different radio programs on a given reception frequency, in particular if the broadcast stations are spatially far apart from each other. If the motor vehicle passes through the respective transmission areas of these transmitting stations and stores the received program identifications and the associated alternative frequency lists in memory MEM, a plurality of program identifications can be assigned to a predetermined reception frequency or alternative frequency.
- the first data signal S BIT1 of the first received signal S REC1 comprises a program identification which is identical to that which corresponds to the second data signal S_BIT2 of the second received signal S_REC2 and thus to the second data signal S_BIT2 of the second received signal S_REC2 currently received radio program is assigned. If both program identifications are in agreement, you can switch to the alternative frequency without changing the radio program.
- the program identification of the currently received radio program with the alternative frequencies assigned to it is preferably stored in the memory MEM.
- the alternative frequencies and other information in the memory MEM can be stored, such. Eg checksums, program services cename, synchronization data, etc.
- the memory MEM is designed as a database to ensure particularly fast access to required data. This allows particularly rapid access to alternative frequencies if a program identification is specified or particularly fast access to program identifications if an alternative frequency is specified.
- the program identification may be referred to as an identification code, which preferably identifies a radio broadcasting station and its broadcast radio program.
- the radio broadcasting station can be referred to as the source of the respective broadcast radio program.
- the identification code may also include other data, with an identification of the radio program and / or the radio station should continue to be guaranteed.
- the identification code in addition to the program identification, for example, be associated with constant data of the RDS signal, which do not change during the entire transmission duration. This has the advantage that filtering by means of the signal filter units is particularly reliable because the filtering takes place over a plurality of data bits of the respective data signal.
- the identification code represents the respective radio broadcasting station and the radio program assigned to the radio broadcasting station. In principle, it is also possible to use other than the program identification as an alternative identification code.
- the first and second signal filter units MF1 and MF2 are preferably designed as signal-matched filter units or correlation filters. Signal matched filters are adapted to a signal pattern of an input side adjacent faulty digital input signal, such. B. the first data signal S_BIT1, with a signal pattern of a known
- Useful signal such.
- an identification code and on the output side an output signal available which is representative of a degree of coincidence of the two signal patterns.
- the output signal of the matched filter thus represents a correlation value which is greater the higher the degree of coincidence of the signal pattern of the known identification code with the signal pattern of the disturbed data signal.
- the specification of the signal pattern of the known identification code preferably takes place in a time-mirrored manner in order to obtain a particularly large correlation value on the output side of the signal-matched filter unit when the signal pattern matches.
- the use of the matched filter unit is also particularly advantageous because a temporal synchronization between the bit pattern of the disturbed data signal and the bit pattern of the predetermined identification code is not required, ie, a transmission time of the disturbed data signal is not required for the comparison.
- the filtering by means of the signal-matched filter unit can be referred to as the comparison of the predetermined signal pattern of the first or second data signal S BIT1 or S_BIT2 with the predetermined signal pattern of the first or second identification code ID1 or ID2.
- the memory MEM is assigned to the first and second signal filter units MF1 and MF2. If, for example, two different identification codes are assigned to the current second reception frequency f2, the first signal filter unit MF1 is supplied with a signal pattern, which is embodied, for example, as a bit pattern, a first identification code ID1 and the second signal filter unit MF2 a signal pattern of a second identification code ID2.
- the signal patterns of the first and second identification codes ID1 and ID2 are given, for example, time-mirrored to the first and second signal filter units MF1 and MF2.
- the drive signal S_SW of the input selector switch SW feeds the first data signal S BIT1 to the first and second signal filter units MF1 and MF2, the data is outputted.
- the signal pattern of the first data signal S_BIT1 comprise all the data bits of the first block, such. B. every 26 bits of data.
- a plurality of blocks can also be assigned to the signal pattern.
- a plurality of passes of the first block may be associated with the signal pattern of the first data signal S_BIT1, such. B. 10 or 11.
- the first and second identification code IDl and ID2 is specified by means of the memory MEM as a signal pattern such that at predetermined times preferably -1 for a known logical zero of the signal pattern of the first data signal S BITl or a 1 for a known logical one of the signal pattern of the first data signal S_BIT1 is specified. Since it may happen that not all the data bits of the signal pattern of the first data signal S BIT1 are known, in particular if, in addition to the respective program identification, further information is compared by means of the first and second signal filter units MF1 and MF2, a 0 for a respective one unknown data bit of the signal pattern of the first data signal S_BIT1 predetermined by the memory MEM.
- MFl a first output signal yl a first detection unit DETl provided on the input side.
- a second output signal y2 of a second determination unit DET2 is provided on the input side.
- the values of the first output signal y1 respectively represent the degree of coincidence of the signal pattern of the first data signal S BIT1 with the predetermined signal pattern of the first identification code ID1, while the values of the second output signal y2 respectively indicate the degree of coincidence of the signal pattern of the first data signal S BIT1 with the predetermined one Represent signal pattern of the second identification code ID2.
- the signal pattern of the first data signal S BIT1 has a particularly high degree of coincidence with the first predetermined identification code ID1
- the value of the first output signal yl is particularly high, for example compared to the value of the second output signal y2 at the output of the second signal filter unit MF2.
- the value of the second output signal y2 is particularly high, for example compared to the value of the first output signal yl.
- the first determination unit DET1 is designed to determine a maximum value of the first output signal y1 over a predetermined number of signal values of the first data signal S BIT1 and to determine a first signal-to-noise ratio S1 / N1, which is subsequently supplied to a decision unit DEC.
- the first signal-to-noise ratio S 1 / N 1 is defined as a ratio of the maximum value of the first output signal y 1 for undisturbed first data signal S_BIT 1 to the determined maximum value of the first output signal y 1 for a disturbed first data signal S BIT 1.
- the second determination unit DET2 is designed analogously to the first determination unit DET1 and determines a maximum value of the second output signal y2 and a second signal-to-noise ratio S2 / N2, which is also provided to the decision unit DEC on the input side.
- the decision unit DEC is designed to compare the first and second signal-to-noise ratio S 1 / N 1 and S 2 / N 2 with a predefined first signal-to-noise ratio limit value.
- Signal-to-noise ratio is designed in such a way that a signal-to-noise ratio which is greater represents a disturbed data signal which comprises a useful-signal component, such as a signal.
- B a still unknown program identification.
- a signal-to-noise ratio which is less than the first signal-to-noise ratio limit value represents a data signal without a useful useful signal component.
- the decision unit DEC is further configured to compare the two signal-to-noise ratios and to select the signal-to-noise ratio whose value is greater. In principle, however, the previous comparison of the respective interference margins with the first signal-to-noise ratio limit value can also be omitted.
- the selected signal-to-noise ratio can then be compared with a second signal-to-noise ratio limit value.
- the second signal-to-noise ratio limit value can, for example, be greater than the first signal-to-noise ratio limit value and the respective identification code.
- the first or second Identi identification code IDL or ID2 be assigned, which is also assigned to the selected signal to noise ratio.
- the respective identification code which is also assigned to the currently received radio program and thus to the second receive frequency f2 can be assigned to the selected signal-to-noise ratio with a particularly high degree of certainty. In principle, however, the comparison of the respective signal-to-noise ratio with the second signal-to-noise ratio limit value can also be omitted.
- the first receiving frequency fl is assigned a new alternative frequency of the currently received radio program and a new comparison is carried out by means of the signal filter units, as already described.
- the respective identification ratio selected, the respective identification code, such. B. the first or second identification code IDl or ID2 are assigned, which is then supplied to the control unit CTRL.
- the control unit CTRL is designed to compare the identification code supplied to it with the identification code associated with the currently received radio program and thus the second reception frequency f2. If the two identification codes do not match, that is the
- Control unit CTRL supplied identification code assigned to a different than the currently received radio program.
- the identification code supplied by the control unit CTRL can be recorded, for example, in a list of receivable radio programs with the reception frequency assigned to it and made available to the user of the radio system for radio program selection, in particular with full name of the radio program.
- the first receiving frequency fl can be assigned a new alternative frequency of the currently received radio program, and a new comparison can be carried out by means of the signal filter units, as already described.
- the frequency value of the first reception frequency f1 can be specified as a new second reception frequency f2.
- a reception quality of the reception signal of the first reception frequency f 1 is preferably compared to a reception quality of the reception signal of the second reception frequency f 2 before the specification of the new second reception frequency.
- the respective reception quality preferably represents an evaluation of the respective received signal and takes into account, for example, a respective reception level, which is preferably detected as electric field strength by means of sensors of the first and second receiving units. Furthermore, the respective reception quality also takes into account, for example, adjacent channel influences, which are caused for example by radio programs which are arranged adjacent to the current reception frequency. However, other reception criteria known to a person skilled in the art can also be taken into account for assessing the reception quality. If the reception quality of the reception signal of the first reception frequency fl is better than that of the reception signal of the second reception frequency f2, the frequency value of the first reception frequency f1 is specified as the new second reception frequency f2.
- the reception quality assigned to the first reception frequency fl is lower than the reception quality assigned to the second reception frequency f2, then the second reception frequency f2 can remain unchanged and the first reception frequency f1 can be assigned as the new alternative frequency of the currently received radio program.
- control unit CTRL is designed to supply the second reception frequency f2 supplied by means of the feedback signal S_FB and the identification code associated with it, as well as alternative frequencies to the second reception frequency f2, to the memory MEM.
- this has the advantage that a plurality of data sets of identification codes and the associated alternative frequencies are stored in the memory MEM which can be preset for the first and second signal filter units MF1 and MF2, in particular if the memory MEM is a non-volatile memory is trained.
- a particularly secure determination of the identification code of the received signal of the first receiving frequency fl can be ensured.
- the control unit CTRL is assigned the control signal S_SW of the input selector switch SW, from which the first or the second data signal S BIT1 or S BIT2 is respectively assigned to the first and second signal filter units MF1 and MF2.
- the control unit CTRL is assigned the control signal S_SW of the input selector switch SW, from which the first or the second data signal S BIT1 or S BIT2 is respectively assigned to the first and second signal filter units MF1 and MF2.
- the input selector switch SW can be controlled by means of the drive signal S_SW such that the first and second signal filter units MF1 and MF2 are assigned the second data signal S BIT2 in order to assign the identification code associated with the new second receive frequency f2. to investigate.
- the input selector SW is controlled by means of the control unit CTRL depending on the manually changed second receiving frequency f2, the input selector SW is controlled by means of the control unit CTRL.
- the first or second reception frequency f1 or f2 in the memory MEM is assigned only a first identification code ID1 which is fed to the first signal filter unit MF1
- an identification code is supplied as the second identification code ID2 of the second signal filter unit MF2 having a predetermined signal pattern which has an unknown identity.
- tification code is represented and hereinafter referred to as unknown identification code.
- the unknown identification code can for example be generated dynamically, i. That is, during the comparison by means of the second signal filter unit MF2, a plurality of combinations of the identification code are compared. Depending on the output signal of the respective signal filter unit, a predetermined degree of agreement is achieved.
- the unknown identification code associated with this degree of coincidence and the reception frequency associated therewith are preferably stored in the memory MEM. However, a full name of the radio program can not be displayed to the user, but preferably the reception frequency.
- the first and second signal filter units MF1 and MF2 and / or the first and second detection units DET1 and DET2 and / or the decision unit DEC and / or the control unit CTRL can each be stored as programs in a microcontroller. be trained or a digital signal processor and processed by them. Alternatively, however, the designated units may also be designed as individual units or as a common structural unit, such as, for example, As an ASIC.
- the first and second receiving unit REC1 and REC2 and their components are preferably constructed as individual components by circuitry. In principle, it is also possible to integrate them in one unit.
- the data records stored in the memory MEM can preferably be used for the creation of a radio program list.
- the radio program list provides the user of the radio system with a list of receivable radio programs. Addition, which can be received at the current location of the motor vehicle. By means of the radio system thus radio programs can be identified very early, even if they have a limited reception quality of the accompanying signal, such. B. the RDS signal, and be included in the radio program list.
- the user of the radio system is thus a large selection of receivable radio programs available, which can be named full preferred.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
Description
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008014612A DE102008014612B3 (de) | 2008-03-17 | 2008-03-17 | Verfahren zum Betreiben eines Radiosystems und Radiosystem |
PCT/EP2009/052778 WO2009115432A2 (de) | 2008-03-17 | 2009-03-10 | Verfahren zum betreiben eines radiosystems und radiosystem |
Publications (1)
Publication Number | Publication Date |
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EP2255468A2 true EP2255468A2 (de) | 2010-12-01 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP09721898A Ceased EP2255468A2 (de) | 2008-03-17 | 2009-03-10 | Rundfunkempfänger mit doppeltuner und alternativer frequenzwahl durch vergleich der rds identifikationskodes |
Country Status (3)
Country | Link |
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EP (1) | EP2255468A2 (de) |
DE (1) | DE102008014612B3 (de) |
WO (1) | WO2009115432A2 (de) |
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US8791650B2 (en) | 2006-02-09 | 2014-07-29 | Led Smart Inc. | LED lighting system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4441789C1 (de) * | 1994-11-24 | 1995-11-23 | Becker Gmbh | Verfahren zur Erkennung von Daten in einem, insbesondere gestörten, RDS-Signal |
IT1297066B1 (it) * | 1997-11-18 | 1999-08-03 | Riccardo Migliaccio | Apparecchio e metodo per la ricezione di segnali radio trasmessi tramite sistema rds |
EP1032128A1 (de) * | 1999-02-23 | 2000-08-30 | Mannesmann VDO Aktiengesellschaft | Verfahren zur Verarbeitung von Sender- und Programmdaten in einem FM-RDS-Rundfunkempfänger |
DE10116564A1 (de) * | 2001-04-04 | 2002-11-07 | Siemens Ag | Verfahren zum Abstimmen eines RDS-Rundfunkempfängers |
US7502589B2 (en) * | 2002-12-06 | 2009-03-10 | Bose Corporation | Supplemental broadcast data processing |
-
2008
- 2008-03-17 DE DE102008014612A patent/DE102008014612B3/de active Active
-
2009
- 2009-03-10 EP EP09721898A patent/EP2255468A2/de not_active Ceased
- 2009-03-10 WO PCT/EP2009/052778 patent/WO2009115432A2/de active Application Filing
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Also Published As
Publication number | Publication date |
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WO2009115432A2 (de) | 2009-09-24 |
WO2009115432A3 (de) | 2010-03-11 |
DE102008014612B3 (de) | 2009-11-12 |
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