WO2015011122A1 - Procédé de reproduction d'un programme radio ainsi qu'unité multimédia permettant l'exécution du procédé - Google Patents

Procédé de reproduction d'un programme radio ainsi qu'unité multimédia permettant l'exécution du procédé Download PDF

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Publication number
WO2015011122A1
WO2015011122A1 PCT/EP2014/065681 EP2014065681W WO2015011122A1 WO 2015011122 A1 WO2015011122 A1 WO 2015011122A1 EP 2014065681 W EP2014065681 W EP 2014065681W WO 2015011122 A1 WO2015011122 A1 WO 2015011122A1
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WO
WIPO (PCT)
Prior art keywords
audio
database
entry
stored
entries
Prior art date
Application number
PCT/EP2014/065681
Other languages
German (de)
English (en)
Inventor
Christian Müller
Original Assignee
Continental Automotive Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2015011122A1 publication Critical patent/WO2015011122A1/fr

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Classifications

    • 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
    • H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H04H60/11—Arrangements for counter-measures when a portion of broadcast information is unavailable
    • H04H60/12—Arrangements for counter-measures when a portion of broadcast information is unavailable wherein another information is substituted for the portion of broadcast information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/40—Arrangements for broadcast specially adapted for accumulation-type receivers

Definitions

  • the invention relates to a method for reproducing a radio program by a multimedia unit of a motor driving ⁇ zeugs as well as an arranged for performing the method and reproduction of the radio program Multimedia unit.
  • the audio signals provided by a radio station by means of a wireless data connection, in particular broadcasting in the sense of broadcast broadcasting, forming the radio program are used to construct a database, wherein the audio signals are stored in the database as entries, in particular with the destination To allow a disturbance of the data connection a trouble-free or low-interference, in particular continuous or almost continuous, playing the received audio signals.
  • the invention also relates to a computer program product with program code means which are suitable for setting up an arithmetic unit of the multimedia unit for carrying out the method.
  • Broadcasting is a major source of entertainment and information in motor vehicles.
  • To broadcast there must be a data link to a radio station commonly selected on a radio receiver or multimedia unit according to the present invention.
  • This data connection is used to receive broadcast content that is audible as an audio contribution, for example in the form of a song.
  • the data connection is often subject to interference, the disturbances of the data connections for canceling or interfering with the reproduction of the Broadcasting content.
  • the disturbances of the data connection in a motor vehicle are caused in particular by the movement of the motor vehicle, since the radio receiver moves with the motor vehicle and the reception quality changes locally.
  • the US 2003/0129941 AI describes a method and a receiver for digital broadcast signals in which the round ⁇ radio signals are used to build a database to reproduce in case of a signal abort, which is registered by a checksum method, broadcast content from this database.
  • the method recognizes received and / or stored on the database program content by an identification name, such as the title of a piece of music. If the same program content is found in the database in the event of a signal abort of a currently received program content on the basis of the identification description , the stored content is reproduced instead of the received content.
  • a data buffer is provided which temporarily stores the received contents and outputs them only with a corresponding delay, so that a sudden signal termination can also be bridged. If no content corresponding to the identification name can be found in the database, another content recently added to the database is used.
  • WO 2008/155595 A1 discloses a method for switching between at least two data connections, which can provide both analog and digital data.
  • the switching to a data connection is carried out either by user input or falling below a threshold value of the reception quality by the other data connection.
  • the US 2010/0325545 AI relates to a method in which based on the reception quality between multiple data ⁇ sources can be switched.
  • Data sources can be data connections or stored data, whereby program contents, such as pieces of music, news or weather reports, can be taken over completely or only partially from the other data sources.
  • Individual quality threshold values can be assigned to these different program contents.
  • the reception quality can be checked, for example, by a checksum method or a signal-to-noise ratio, without it being possible to unambiguously identify the program contents.
  • the entries are uniquely identified by a label.
  • the database constructed from the received audio signals can be searched on the basis of the label, so that the stored contents can replace the currently received contents instantaneously, because the audio signals can be replaced directly on the basis of their unique labels in the sense of an identification.
  • the contents received incorrectly or incompletely due to the disturbance in the database are wholly or partly replaced by the same stored contents, which are each uniquely identified and assignable by their label.
  • the invention is based on the idea that the content generated by the reproduced audio signals in the broadcast be repeated frequently.
  • an audio signal already received and stored in the database as an entry which can be uniquely assigned to a music content (or other content) or a part thereof by its label, can be used to provide identical content without interference or interference at the moment of occurrence Disturbance in the data reception play.
  • An inventive particularly preferred variant of the proposed method provides that the entries are stored as audio fragments.
  • An audio fragment in this sense is a section or part of several chronologically related sections or parts of a content-related audio signal or audio signal. Audio contributions, such as a song.
  • Audio contributions such as a song.
  • a current audio signal over the data connection such as broadcasting received, identify a label and having to search for a corresponding entry in the database according to an advantageous
  • the entry stored as an audio fragment has a link to a temporally subsequent entry stored as an audio fragment, which content directly follows the (previously) stored audio fragment of the entire audio contribution.
  • the Ver ⁇ linkage can for example be designed as a link Ver ⁇ linkage to a location or store name (label).
  • a label used to identify an audio signal may contain, as content-specific information, a unique name for the entry.
  • a name as a content-specific infor mation ⁇ according to the invention may in particular denote the content of a received audio signal. This can be, for example, a song, an artist or an album.
  • a combination of a plurality of content-specific and / or other information is used for the creation of the label.
  • the content-specific information can be derived, for example, from metadata provided by the radio stations.
  • Such metadata is often transmitted by the radio stations as Radio Text / Radio Text + of the Radio Data System (RDS) or as Dynamic Label Service / Dynamic Label Service + (DLS / +) of the Digital Audio Broadcasting (DAB / DAB +) and by a receiver with suitable radio text.
  • Decoder provided which decrypts the received metadata and thus makes it available for use in a label.
  • the labels used for identifying a content to be created additionally or alternatively by means of audio-specific information, containing in particular technical characteristics of the entry, respectively of the stored with the entry Au ⁇ diosignals, and / or use.
  • Audio-specific information can be, for example, a spectrogram of the audio signal, an autocorrelation function of the audio signal in the time and / or frequency domain and / or a power density spectrum of the audio signal. The possibilities for production Such signals are known in the art and can be determined by a game as already provided for in the multimedia unit audio decoder with ⁇ .
  • audio-specific information for generating the label is preferred according to the invention, because based on this information a unique identification of the audio signal or audio ⁇ fragments by its label is possible, even if a purely content-based information-based label would not be unique. For example, only the artist and title of an audio post is not sufficient to clearly mark each of the audio fragments that make up the audio contribution.
  • audio-specific information also uniquely identifies an audio fragment similar to a digital fingerprint.
  • a particularly fast database search can be realized when content-specific and audio-specific content is combined in a single label.
  • the content-specific content such as artist and title, can be used in particular for pre-filtering the entries in the database, so that the more complex comparison of the audio-specific information must be carried out only with fewer entries.
  • beaten before ⁇ method can be provided to monitor the quality of the received audio signal via the data connection by means of a quality monitoring.
  • the data connection can be monitored, for example by an arithmetic operation for a fault.
  • Possibilities which are already known in principle for this purpose are the calculation of a signal-to-noise ratio (SNR), a bit error rate (BER) and / or a check sum method, for example CRC (Cyclic Redundancy Check).
  • threshold values are preferably set according to the invention, which allow an allocation of the data connection as interference-free or low-interference or as a disturbed data connection when it exceeds or falls below.
  • a database search for stored entries corresponding to the currently received audio signal occurs. Such a search can be carried out in particular by producing labels for currently reproduced audio signals, for example by the audio and / or radio-text decoder and / or the arithmetic unit of the multimedia unit, in the same way as for entries stored in the database. The database is then searched for this lab during playback.
  • ⁇ design of the method is that with a decrease in quality of the received audio signal by an optionally a ⁇ adjustable predetermined quality threshold and a value stored in the database entry corresponding to the currently received audio signal, instead of the currently received Au ⁇ diosignals the corresponding entry from the database as ⁇ is given.
  • This makes it possible to switch over to entries stored in the database prior to the occurrence of a disturbance in the data connection preventing the reproduction of the currently received audio signals, for example when changing the current to the subsequent audio fragment.
  • content-related entries can be reproduced directly in succession, for example until one or the current audio contribution is completely reproduced, even if it is each entry is just an audio fragment of a full audio post.
  • the reproduction from the database can be carried out according to the invention until the received audio signal is again received with sufficient quality or the content-related entries in the sense of an audio contribution, for example a song, is completed.
  • Another advantage of searching the database for entries corresponding to the current audio signal in parallel with the reproduction of this currently received audio signal is that an entry is always added to the database, i. H. can be stored as an entry in the database if the quality of the data connection is sufficient; d. H. the quality is above a possibly adjustable, predetermined quality threshold, and no already identical entry is contained in the database.
  • the label used for the storage of the audio signal was already generated during the search of the database, so that the entry of audio signal, for example in the form of an audio fragment, and label can be stored in the database directly and without further computation, if such an entry does not exist.
  • the recording of an entry in the database thus takes place parallel to the reproduction of the received and stored audio signal.
  • the audio signals or fragments stored in the entries can replace the currently received audio signals for several minutes, or just a few milliseconds, depending after how long the reception is qualitatively bad or even completely disturbed. For example, in a tunnel crossing of the motor vehicle, the data connection may be disturbed for several minutes.
  • the stored content in the form of audio signals is then played back for several minutes and replaces the received audio signals.
  • the method described can be used to switch as nearly as possible or almost seamlessly between the audio signals received via the data connection and the audio signals stored in the database as entries. The change occurs in most or many cases unnoticed by the listener.
  • individual, faulty or incomplete packets can also be replaced by the stored audio fragments for only a few milliseconds by the method according to the invention.
  • the failure of individual data packets which can be detected by means of a CRC method or will be corrected unnoticed for the listener.
  • the audio data packets of a packet-oriented data transmission can be stored as audio fragments. This has the advantage that the stored audio fragments can be played directly and directly instead of the audio data packets.
  • This Multime ⁇ diaiser has at least one receiver for receiving an audio signal, preferably a radio receiver, a
  • Playback unit with an audio decoder for generating a playback signal to be played and, if serving unit for setting to be reproduced audio signals, so for example, to change the channels and / or volume ⁇ setting, and a speaker on.
  • the multimedia unit is equipped with a storage unit for storing audio signals as entries in a database and with a computing unit having a processor, the pro cessor ⁇ the arithmetic unit for carrying out the method described above, or parts thereof is established.
  • a receiver for example, receivers can be used, which allow the reception of DAB / DAB +, HD radio, AM or FM broadcasting, especially with RDS, or Sirius Satellite Radio.
  • the multimedia unit also includes a radio ⁇ text decoder for decrypting provided by the radio station metadata, such as radio text.
  • the invention also relates to a computer program product with program code means, which are suitable for setting up the computing unit for carrying out the above-described method or parts thereof on a computer unit.
  • Fig. 1 is a schematic overview of an inventive
  • Multimedia unit for carrying out the method according to a first preferred embodiment, in which a label is generated from content-specific information
  • 2 shows a schematic overview of a multimedia unit according to the invention for carrying out the method according to a second preferred embodiment, in which a label is generated from audio-specific information
  • Fig. 3 shows schematically the process according to the invention in the
  • Fig. 4 shows schematically the process according to the invention in the
  • a receiver 2 receives via a wireless data connection 3, in particular broadcasting in the sense of a broadcast broadcasting, audio signals from a radio station.
  • This receiver 2 may be suitable for receiving analog and / or digital audio signals.
  • Analog broadcast signals may be, for example, audio signals generated by amplitude modulation (AM) or frequency modulation (FM).
  • Digital audio signals may be based on digital broadcasting, such as Digital Audio Broadcasting (DAB), or provided by another wireless data link 3.
  • DAB Digital Audio Broadcasting
  • Such wireless data connections 3 can also be provided in a mobile radio network, for example Universal Mobile Telecommunications System (UMTS) or Long Term Evolution (LTE).
  • UMTS Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • satellite-based analog and / or digital broadcasting can be used as a data link 3.
  • Analog audio signals can be converted into a digital signal after being received by an analog-to-digital converter (A / D converter) integrated, for example, in the receiver 2.
  • a / D converter analog-to-digital converter
  • the radio program forming content as audio signals be provided riding ⁇ .
  • Such content includes, for example, music contributions in the form of music titles, news, traffic and / or weather reports, comments, reports, readings or any other content that can be heard as an audible signal.
  • the audio signals are after possibly a suitable conversion in an audio decoder 4 as playback signals to a
  • Speaker 5 of the multimedia unit 1 is output, which plays the received audio signals (and thus the radio program).
  • the audio decoder 4 can in particular output digital signals.
  • a database 6 is constructed from the received audio signals by storing the audio signals as entries A, B, C, each of the entries A, B, C containing the stored audio signal 7 and a label 8 created for this audio signal 7.
  • This label 8 uniquely identifies the entry A, B, C and the audio signal 7 stored in the entry A, B, C.
  • the received audio signal is divided and stored as the (time-limited) Audio ⁇ fragment. 7
  • a content-related audio contribution for example a music title, then consists of a plurality of temporally successive audio fragments 7.
  • FIG. 1 shows schematically, using the example of the multimedia unit 1, how the entries A, B, C are derived from the received audio signals.
  • the contents provided via the data link 3 in the form of audio signals are received by the receiver 2 and converted by an audio decoder 4 into a playback signal output by the speaker 5.
  • the time-limited division can be achieved, for example, by a time specification for the audio fragments 7 or a memory size of the
  • Audiofragmente 7 done.
  • one or more data packets from the data transmission can also be used as audio fragment 7.
  • the audio fragments output by the audio decoder 4 can not only be reproduced by the loudspeaker 5, but can also be forwarded to a database manager 9 of the database 6. This takes, at least if a corresponding audio fragment 7 is not yet stored in the database 6, this audio fragment 7 together with a label 8 as entry A, C, B in the database 6.
  • fragment X fragment X
  • labels 8 label X
  • each entry A, B, C in the database 6, d. H. in the database stored audio fragment 7 to assign a label 8 content-specific and / or audio-specific information, so that label 8, the audio fragment 7 clearly characterizes and identifies.
  • the metal tades takes this information, which are transmitted with the actual audio signal as radio text.
  • This meta-information can be, for example, the name of a piece of music (title), the name of the artist or artist, the name of the album, or other accompanying information used to assign a suitable, unique label for the database entry serve.
  • Radio text or comparable radio text extensions are transmitted, for example, as Radio Text + for RDS or DLS + for DAB. If appropriate, in addition to, for example, title and artist, the start time of the current audio fragment 7 can also be indicated since the start of the complete audio contribution, for example the music title.
  • audio-specific information with technical information about the audio fragment can be output to the database management by the audio decoder 4 in parallel with the audio fragment 7, which are also used in the label 8.
  • This may be, for example, an autocorrelation function in the time and / or frequency domain or a power density spectrum of the audio fragment 7.
  • This audio-specific information is technically correlated with the structure of the audio fragment 7 and therefore form virtually a fingerprint of the audio fragment 7.
  • This audio-specific information is therefore well suited for unambiguous identification of an audio fragment 7 stored in an entry A, B, C as label 8 or part the label 8, wherein ⁇ play in addition to content-specific information such as title, artist, and others.
  • the embodiment shown in Fig. 2 is similar to the provision of the radio-text decoder 10 of the embodiment of FIG. 1 and will therefore not be described again. Due to the absence of the radio text decoder 10 in the off ⁇ guide die according to FIG. 2, the label 8 is formed in this embodiment, exclusively on the basis of audio-specific information in the manner described above.
  • a quality monitoring 11 of the audio signals received via the data connection 3 ie a quality monitoring 11 of the data connection 3.
  • This can be done in quality monitoring 11 in a manner known per se, for example by calculating a signal-to-noise ratio. ratio, a bit error rate (BER) or the result of a checksum method (for example CRC - Cyclic Redundancy Check).
  • the quality information obtained is used to identify a trouble-free or low-interference data connection 3. For this purpose, it can be checked, for example, whether, depending on the quality check carried out, an optionally adjustable predetermined threshold value is exceeded or undershot. This result is communicated to the database 6, for example the database manager 9.
  • the receiver 2 with the audio decoder 4 and the radio-text decoder 10 including the quality monitor 11 form a radio receiver 12.
  • the database management 9 performs a database search in the database, which searches for the current label 8 uniquely identifying the audio fragment 7, which is the currently received audio signal from the audio decoder 4 and / or the radio-text decoder 10 was generated. If such a unique label 8 is already found in the database 6 in the stored entries A, B, C, the current audio fragment 7 is already stored and no longer needs to be added to the database 6 again. On the other hand, if the label 8 does not yet exist, the audio fragment will be displayed
  • the audio signals 7 stored in the database 6 thus serve as an alternative to the currently received audio signal of the radio receiver 12 and enable an audio contribution to be reproduced by the multimedia unit even if no audio signal can be received via the data connection 3 and also no alternative frequency for a change the data connection 3 is available. In many cases, stopping audio contributions can be prevented.
  • the audio fragments 7 stored in the database 6 thus represent a kind of copy of the otherwise currently received audio signal and replace the expected audio contribution for a period of a few minutes (for example, during a tunnel crossing of the Radio receiver 12) or a few milliseconds in case of failure of individual data packets of the audio signal in a packet-oriented data connection 3 (for example, detected by CRC).
  • the method also represents an effective way to correct packet errors in a data link 3 and thus, for example, to blur the typical DAB interference blur of a DAB receiver.
  • the unique labels 8 generated in the method preferably from a combination of content-specific information and audio-specific information about an audio fragment 7 are used for the simple search for a suitable audio fragment 7 in the database 6.
  • the simplified search allows an implementation by means of less complex

Abstract

L'invention concerne un procédé et une unité multimédia (1) d'un véhicule automobile servant à la reproduction d'un programme radio par l'unité multimédia (1). Selon la présente invention, les signaux audio formant le programme radio, fournis par une liaison de données (3) au moyen d'un émetteur radio sont employés pour constituer une banque de données (6), les signaux audio (7) étant stockés dans la banque de données (6) en tant qu'enregistrements (A, B, C), tandis que des signaux audio reçus défectueux ou incomplets en raison d'une perturbation sont remplacés intégralement ou en partie par des enregistrements stockés (A, B, C) de sorte que les signaux audio (7) stockés dans les enregistrements (A, B, C) sont reproduits à la place des signaux audio reçus. Les enregistrements (A, B, C) sont identifiés sans ambiguïté par une étiquette (8).
PCT/EP2014/065681 2013-07-25 2014-07-22 Procédé de reproduction d'un programme radio ainsi qu'unité multimédia permettant l'exécution du procédé WO2015011122A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013214562.4 2013-07-25
DE102013214562.4A DE102013214562B4 (de) 2013-07-25 2013-07-25 Verfahren zur Wiedergabe eines Radioprogramms sowie Multimediaeinheit zur Durchführung des Verfahrens

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WO2015011122A1 true WO2015011122A1 (fr) 2015-01-29

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PCT/EP2014/065681 WO2015011122A1 (fr) 2013-07-25 2014-07-22 Procédé de reproduction d'un programme radio ainsi qu'unité multimédia permettant l'exécution du procédé

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DE (1) DE102013214562B4 (fr)
WO (1) WO2015011122A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004097803A2 (fr) * 2003-04-25 2004-11-11 Xm Satellite Radio Inc. Systeme et procede d'enregistrement et de lecture de contenu multimedia numerique
WO2006134516A1 (fr) * 2005-06-17 2006-12-21 Koninklijke Philips Electronics N.V. Reception d'emissions radiodiffusees
EP2026482A1 (fr) * 2007-07-20 2009-02-18 Harman Becker Automotive Systems GmbH Procédé pour le contrôle de la reproduction d'un programme radio

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
JP3818575B2 (ja) 2001-09-19 2006-09-06 株式会社日立製作所 デジタル放送受信装置
CN101273536B (zh) * 2005-11-02 2011-02-16 三菱电机株式会社 数字播放接收机
EP2156581B1 (fr) 2007-06-18 2019-01-09 Nokia Technologies Oy Procédé et dispositif pour une continuation de lecture multimédia
US20100325683A1 (en) 2009-06-17 2010-12-23 Broadcom Corporation Media broadcast emulator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004097803A2 (fr) * 2003-04-25 2004-11-11 Xm Satellite Radio Inc. Systeme et procede d'enregistrement et de lecture de contenu multimedia numerique
WO2006134516A1 (fr) * 2005-06-17 2006-12-21 Koninklijke Philips Electronics N.V. Reception d'emissions radiodiffusees
EP2026482A1 (fr) * 2007-07-20 2009-02-18 Harman Becker Automotive Systems GmbH Procédé pour le contrôle de la reproduction d'un programme radio

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