EP3005591A1 - Evaluation and acoustic emission of audio broadcasting signals in a vehicle - Google Patents
Evaluation and acoustic emission of audio broadcasting signals in a vehicleInfo
- Publication number
- EP3005591A1 EP3005591A1 EP14705478.7A EP14705478A EP3005591A1 EP 3005591 A1 EP3005591 A1 EP 3005591A1 EP 14705478 A EP14705478 A EP 14705478A EP 3005591 A1 EP3005591 A1 EP 3005591A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reception path
- reception
- path
- radio
- criterion parameter
- 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.)
- Granted
Links
- 238000011156 evaluation Methods 0.000 title description 3
- 238000000034 method Methods 0.000 claims abstract description 32
- 230000003139 buffering effect Effects 0.000 claims description 18
- 230000003111 delayed effect Effects 0.000 claims description 7
- 238000005265 energy consumption Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims 2
- 230000008901 benefit Effects 0.000 description 13
- 230000005540 biological transmission Effects 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000012432 intermediate storage Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012067 mathematical method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
- H04H20/61—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast
- H04H20/62—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast for transportation systems, e.g. in vehicles
-
- 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
- H04H20/24—Arrangements for distribution of identical information via broadcast system and non-broadcast system
-
- 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
Definitions
- the invention relates to a method for the acoustic emission of radio signals in a vehicle, in which radio signals can be transmitted via a first and at least one second reception path into the vehicle and received there, wherein the first reception path evaluated by at least one criterion parameter based on a receivable radio signal is, and the second reception path also based on the receivable via him radio signal by a
- Radio programs are consumed in the vehicle traditionally and mainly via analogue radio reception by means of AM (amplitude modulation) or FM (frequency modulation) in the vehicle.
- the digital radio reception of radio programs for example in the form of DAB (Digital Audio Broadcast), has been available for several years as a further reception route.
- An innovation for suitably equipped vehicles is the radio reception from the Internet via the mobile radio channel, so Internet radio as another way to receive. Internet radio does not use physical broadcasting stations that need to be stationary. From the user's point of view, all reception paths have different advantages and disadvantages with regard to audio quality, latency to the original signal, reception range and costs, which makes switching between different reception channels attractive to the user.
- the document DE 10 2005 041 653 A1 describes a method for switching between analog and digital radio reception that is less perceptible by a user.
- a synchronization of the two radio signals via a correlation method allows a switch between the reception paths here, without the user being aware of a gap or a repetition in the radio signal.
- the object of the present invention is to make the broadcast of radio signals in the vehicle more user-friendly when changing a reception path. This object is achieved by a method by a
- the inventive method for the acoustic emission of radio signals in a vehicle includes the ability to transmit radio signals via a first and at least one second receiving path or receiving channel into the vehicle and to be able to receive there.
- the first reception path is evaluated by means of a radio signal that can be received via it by at least one criterion parameter
- the second reception path is also evaluated on the basis of the radio signal receivable via it by a criterion parameter.
- the criterion parameter may be a single parameter such as a measurand, but also a parent parameter that includes several individual parameters.
- the criterion parameters of the reception paths can be identical, ie include identical measured variables and / or parameters. However, they can also comprise divergent measured variables and / or parameters, and then, for example via a comparison list or an algorithm, be converted into each other and compared. It is essential here that a preparation phase is started during a broadcast of the radio signal via one of the reception paths, the current reception path, depending on a comparison of the criterion parameter of the instantaneous reception path with a first threshold value.
- This preparatory phase is used to prepare a later switchover, if necessary, from the current reception path, ie the reception path via which the currently acoustically emitted radio signal is received, to the other reception path or, if several reception paths are available, according to the evaluation by the Criterion parameter best reception path.
- a comparison of the criterion parameter of the instantaneous receive path is carried out with a second threshold lower than the first threshold value, and a check of a changeover to the other receive path is carried out if the second threshold value is undershot.
- a switchover is first prepared after a comparison with the first threshold value.
- switching to another reception path is checked.
- a preferred embodiment of the method according to the invention provides that, when checking the switching over, the criterion parameter of the other receiving path is compared with the second threshold value and switched to the other receiving path, if this criterion parameter does not fall below the second threshold value or if it falls below the falling below the criterion parameter of the current reception path.
- An advantageous embodiment of the method according to the invention provides that the radio signal received during the preparation phase via the other reception path, which is to be radiated onto the other reception path after a possible switchover to be effected, is buffered.
- This has the particular advantage that switching in sequence can be made particularly pleasant for the user, for example seamlessly, and, for example, an inaudible switching can also be realized via a correlation method.
- a complete information transfer is achieved.
- the preferred extent of the buffering that is to say in particular the amount of buffered information, is in principle to be selected as a function of current environmental conditions such as, for example, the local position of the vehicle, weather conditions or local reception conditions.
- the buffering is only started if, as the other reception path, such a provision is provided in which an information presentation of the information contained in the radio signal Information about an offset time interval offset in time - ie delayed or even ahead of time - is performed to the information presentation on the current reception path.
- the buffering be started if at least one of the other receiving paths which are suitable for the future acoustic broadcasting or presentation of the radio signal is a receiving path in which the radio signals are transmitted via a mobile radio channel.
- the Internet radio is a possible reception path for the broadcast of the radio signal. This has the advantage that it is precisely the delays occurring in a mobile radio channel due to intermediary providers and fluctuations in the transmission rate, in particular immediately after connection establishment, and in particular also a variable, but predetermined by the Internet radio provider temporal offset can be compensated by a buffer.
- This has the advantage that the particularly striking temporal offset between a broadcast-based reception path, in particular a delay-free reception path such as FM or AM, can be compensated for by comparatively strong, for example. Up to thirty seconds or even beyond, delayed Internet radio and resulting pauses in the broadcast of the radio signal are avoided.
- a preferred embodiment of the method according to the invention provides that the preparation phase, in particular the buffering, is terminated when an actual switchover to the other reception path is carried out and / or the first threshold value is exceeded again by the criteria parameter values, at least for a predefinable excess time interval becomes.
- This has the advantage that unnecessary caching is avoided. This is the case, for example, if a switch was made to a receive path which does not require buffering or if, due to an improvement in the quality of the radio signal received via the current receive path, future switching is no longer possible, so that buffering is no longer possible necessary is.
- the specifiable exceedance time interval here ensures that a short-term improvement in the quality of the current reception path does not lead to a clearing of the buffer that may be required shortly afterwards.
- the predeterminable excess time interval is predetermined so that short improvements in the quality of the current reception path, so in particular erratic, deltapeak-like improvements in the quality do not lead to a cessation of caching.
- a predeterminable excess time interval may be, for example, two seconds.
- the duration of the excess time interval can be determined or changed dynamically as a function of changing environmental conditions or predefined in advance.
- a further embodiment of the method according to the invention provides that switching over from the instantaneous receive path to the other receive path depends on whether the second threshold value is undershot by the criterion parameter values for at least one predefinable undershoot time interval.
- This has the advantage that short deltapeak-like deteriorations of the quality of the radio signal received via the current reception path can not be switched to lead the other, possibly in the course of time unfavorable, reception route.
- An exemplary value for the predefinable undershoot time interval is here two seconds.
- the duration of the underflow time interval can be determined or changed dynamically as a function of changing environmental conditions, or predefined in advance.
- the criterion parameter of the different reception paths via signal processing steps and / or other mathematical methods or calculations - for example via an averaging, a weighted integration, or a convolution with a core - as a size from the respective reception field strength and / or in the respective signal noise Ratio (SNR) and / or the respective bit error rate (BER) and / or the available data rate in the mobile radio network used and / or the radio network type and / or possibly required roaming and / or the decoder Audio Quality (Service) and / or the Fast Information Channel (FIC) and / or the Received Signal Strength Indicator (RSSI) and / or an existing stereo / mono switching and / or a cost factor, which, for example, energy consumption and / or use of resources and / or monetary costs in connection with the reception path are processed, in such a way that the time profile of the individual listed variables taken into account and in particular individual short-term or immediately after switching takes place overruns or underruns of the two threshold
- the criterion parameter of the different reception paths is processed as a quantity such that expected changes in the respective reception field strength and / or the respective signal-to-noise ratio (SNR) and / or the respective bit error rate (BER) and / or the available data rate in the mobile radio network used and / or the radio network type and / or possibly required Roaming and / or the Decoder Audio Quality (Service) and / or the Fast Information Channel (FIC) and / or the Received Signal Strength Indicators (RSSI) and / or a present stereo / mono switching and / or a cost factor, which, for example, energy consumption and / or resource utilization and / or monetary costs associated with the reception path, are taken into account.
- SNR signal-to-noise ratio
- BER bit error rate
- RSSI Received Signal Strength Indicators
- the switching to a delayed receiving path such as the Internet radio or Digital Audio Broadcast (DAB) via a cross-fading or silence, a so-called. "Mute”, take place. part is here that the user does not feel that switching is abrupt and unpleasant.
- DAB Digital Audio Broadcast
- the switching over from a delayed receiving path such as Internet radio or DAB to a delay-free receiving path such as FM or AM can be done in two different ways: either without maintaining the delay, ie with an information skip, or with a Maintaining the delay, ie without skipping information - in the latter case, in particular with the aid of a correlation method and a buffering of the radio signal from the delay-free reception path.
- HMI human-machine interface
- an information presentation system for acoustically broadcasting radio signals in a vehicle comprising at least one acoustic source and a receiving unit for receiving radio signals, comprising the function of, in particular, receiving, evaluating the signals and controlling switching between the reception paths.
- at least two receiving paths for transmitting radio signals to the receiving unit are included, wherein radio signals can be transmitted via a first and at least one second reception path into the vehicle and received there, wherein the first reception path based on a receivable via him radio signal by means of at least one criterion parameter by the receiving unit is evaluated in the quality, and the second reception path is also evaluated on the basis of the receivable radio signal via it by means of a criterion parameter by the receiving unit.
- the receiving unit is designed such that during a broadcast of the radio signal via one of the reception paths, the current reception path, depending on a comparison of the criterion parameter of the current reception path with a first threshold, a preparation phase for preparing a switch from the current, that is, the reception path to the other reception path currently provided for transmission, or, in the case of several other reception routes, to the best of these reception paths according to the respective criterion parameters, and in the preparation phase the criterion parameter of the instantaneous reception path is compared to is compared with the first threshold value lower second threshold value, and when falling below the second threshold value, a switchover to the other reception path is checked.
- the invention also includes a vehicle having such an information presentation system as described above or an advantageous embodiment thereof.
- Fig. 1 is a flowchart of an embodiment of a
- Fig. 3 shows an exemplary course of two others
- FIG. 1 shows a flow chart of an exemplary embodiment of a method according to the invention.
- a first step 1 here comprises a continuous and simultaneous ongoing checking of the reception quality of the available reception paths, ie a checking of the criterion parameters of all reception paths.
- the criterion parameter of the selected reception path which is currently used for transmission, is compared with the predetermined first and second threshold. If the value of the criterion parameter is above the first value of the first threshold, no further action is carried out, but only the continuous checking of the reception quality according to step 1 is continued. If the value of the criterion parameter lies between the values of the first and second threshold, a change to the or, in the case of several possible reception paths, another reception path is prepared in a further step 3.
- this includes an intermediate storage of the radio signal received via the other reception path. Furthermore, the continuous checking of the quality of the reception path is continued on the basis of the criterion parameters according to step 1. If the value of the criterion parameter of the selected reception path is below the value of the second threshold, then after step 2, in a step 4, a changeover to the other reception path is checked and, if appropriate, carried out. In any case, after checking or switching with Continuing to check the reception quality of all reception paths according to step 1.
- step 1 digital and analogue (FM) broadcasting and Internet radio are available as reception channels.
- the radio signal received via digital broadcasting is broadcast.
- step 3 the quality of all three reception paths is then continuously checked on the basis of the criterion parameters. If the criterion parameter of digital broadcasting falls below the first threshold value, step 3, for example, prepares for switching to the Internet radio by buffering. In a further deterioration of the reception via digital broadcasting, a decrease in the corresponding criterion parameter below the second threshold value, a switching is checked in accordance with step 4. If, for example, according to the criterion parameters, the analog broadcast signal is to be preferred to the Internet radio, it may be switched to the analog broadcast signal.
- the buffering according to step 2 is stopped. Should the analog FM signal deteriorate, depending on the criterion parameter, a change can be prepared again in accordance with step 3, ie, for example, a buffering of the signal receivable via the Internet radio can be initiated. If, in a further deterioration of the analog signal according to step 4, switching is checked and, for example, the Internet radio is the preferred reception path, then the cached content is used and the switching to Internet radio takes place for the user without a perceptible pause of the acoustic emission of the radio signal , Without a preliminary caching, the user would have to wait until the information received via the Internet radio is sufficient and therefore audible.
- the acoustic emission of the radio signal may be interrupted.
- FIG. 2 shows an exemplary time profile of two different criterion parameters in the same situation.
- the two criterion parameters here are, for example, the intensity I of an FM broadcast signal and an averaged intensity ⁇ 1>, which is derived from the intensity I.
- Both intensities I, ⁇ I> are plotted over time t.
- Also drawn in are the threshold values S1, S2 belonging to the first and second thresholds.
- the threshold value S1 is greater here than the threshold value S2.
- the two criterion parameters are initially above the threshold S1 at the times before t1.
- the first criterion parameter that is, the intensity I
- the threshold value S1 falls below the threshold value S1 shortly thereafter at a point in time t2 above the threshold value S1.
- the times t1 and t2 so switching is prepared. Since Internet radio is the alternative reception path, in this example a good reception quality for Internet radio is assumed, and thus comes for a future switching in question, there is a buffering of the radio radio signal received via the Internet radio.
- the preparation phase or the buffering is avoided here since the short-term drop in the intensity I below the threshold value S1 in the averaged intensity ⁇ 1> is not noticeable. It makes sense, however, for example, a later, renewed drop in the intensity I below the threshold value S1 at a time t3 even with consideration of the average intensity ⁇ L> recognizable - albeit at a slightly offset from the time t3 time t A.
- the analogue radio can be switched back as a reception path.
- the user can then, for example via a button, a "live" switch, jump again to the immediately in analog - delay-free and thus compared to the Internet radio ahead of time - FM broadcast reproduced radio content.
- FIG. 3 shows a further exemplary profile of two criterion parameters.
- an analog radio reception via FM is not desired here, so that, for example, digital broadcasting with DAB and the inter- netradio are available as reception channels.
- the intensity I for example that of the digital DAB broadcast signal or the corresponding average intensity ⁇ 1>, is selected as the y-axis and the time t as the x-axis.
- the two thresholds S1 and S2 are shown. Initially, so at times before t1, are intensity I and averaged intensity ⁇ I> still above the threshold value S1, but this will change at the time t1 or t A.
- the strongly fluctuating intensity I and consequently also the averaged intensity ⁇ 1> drops below the first threshold value S1 almost to the second threshold value S2, which in the present example with the Internet radio as alternative Receiving path caching the radio signal received via the Internet radio triggers, since in this example a good reception quality for the Internet radio is adopted.
- the threshold value S2 is repeatedly passed through in the brief successive times t2, t3, t4 and t5.
- the intensity I rises again, it even rises briefly, between the immediately successive times t6 and t7, to a value above the first threshold S1.
- the averaged intensity value ⁇ 1> follows this sudden increase only with a delay and does not exceed the first threshold value S1.
- the choice of the intensity I as a criterion parameter at the time t6 leads to an interruption or stopping of the intermediate storage due to the exceeding of the threshold value S1. cherns.
- the interruption of the buffering can have unfavorable consequences - for example if between the two times t7 and t8 not enough time has passed to completely fill the cache again.
- sufficient information can not be used in the intermediate memory when switching to Internet radio, so that the user may have to accept an interruption in the broadcast radio signal when switching over, for a duration that is, for example, due to a technically required further Caching is conditional.
- the DAB radio signal is again available at a sufficient intensity I at a later time, a switchback from the Internet radio to DAB reception may be desired, possibly for cost reasons. This is realized, for example, by an influence of the costs on the criterion parameter.
- the DAB radio signal is generally ahead of the time in comparison with the Internet radio signal, so that information can be skipped when switching from Internet radio to DAB as the reception path.
- the DAB radio signal it is also possible, for example, for the DAB radio signal to be buffered and, possibly via a correlation method, an inaudible switching from Internet radio to DAB to be carried out as the reception path of, for example, the same radio signal.
- the identical radio signal received by means of DAB is delayed acoustically to the identical radio signal previously received via Internet radio broadcast.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013009670.7A DE102013009670B4 (en) | 2013-06-08 | 2013-06-08 | Evaluate and Acoustic emission of radio signals in a vehicle |
PCT/EP2014/000445 WO2014194970A1 (en) | 2013-06-08 | 2014-02-19 | Evaluation and acoustic emission of audio broadcasting signals in a vehicle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3005591A1 true EP3005591A1 (en) | 2016-04-13 |
EP3005591B1 EP3005591B1 (en) | 2021-10-27 |
Family
ID=50150685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14705478.7A Active EP3005591B1 (en) | 2013-06-08 | 2014-02-19 | Evaluation and acoustic emission of audio broadcasting signals in a vehicle |
Country Status (5)
Country | Link |
---|---|
US (1) | US9705616B2 (en) |
EP (1) | EP3005591B1 (en) |
CN (1) | CN105284067A (en) |
DE (1) | DE102013009670B4 (en) |
WO (1) | WO2014194970A1 (en) |
Families Citing this family (12)
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JP2017028425A (en) * | 2015-07-21 | 2017-02-02 | アルプス電気株式会社 | Receiver |
JP6509093B2 (en) * | 2015-10-23 | 2019-05-08 | アルパイン株式会社 | Broadcast receiver and output control method |
DE102016012172A1 (en) * | 2016-10-12 | 2018-04-12 | Frank Baumann | WIFI, Wi-Fi, DAB, DAB +, VHF headphones |
EP3340498B1 (en) | 2016-12-22 | 2022-07-13 | Nxp B.V. | Receive path quality information |
EP3340497A1 (en) | 2016-12-22 | 2018-06-27 | Nxp B.V. | Error concealment with redundant data streams |
JP2018198411A (en) * | 2017-05-25 | 2018-12-13 | アルパイン株式会社 | Radio broadcast receiver and seamless switching method |
IT201700076233A1 (en) * | 2017-07-06 | 2019-01-06 | Axis S R L | Method of reproducing radio programs from a plurality of sources. |
DE102019201605B3 (en) | 2019-02-07 | 2020-04-23 | Audi Ag | Method for operating a media playback device and media playback device |
DE102019211160B4 (en) * | 2019-07-26 | 2021-02-04 | Audi Ag | Method for assigning an Internet radio station to a broadcast radio station of a radio station as well as receiver device and motor vehicle |
EP3787370A1 (en) * | 2019-08-30 | 2021-03-03 | Alpine Electronics, Inc. | Method of receiving a radio program and radio receiver |
US11418879B2 (en) * | 2020-05-13 | 2022-08-16 | Nxp B.V. | Audio signal blending with beat alignment |
US20240097725A1 (en) * | 2022-09-16 | 2024-03-21 | Shure Acquisition Holdings, Inc. | Transmit redundancy and autonomous receiver channel selection in a wireless in-ear monitor audio system |
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Also Published As
Publication number | Publication date |
---|---|
EP3005591B1 (en) | 2021-10-27 |
CN105284067A (en) | 2016-01-27 |
DE102013009670A1 (en) | 2014-12-11 |
DE102013009670B4 (en) | 2016-01-07 |
US20160119066A1 (en) | 2016-04-28 |
US9705616B2 (en) | 2017-07-11 |
WO2014194970A1 (en) | 2014-12-11 |
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