EP1381024A1 - Méthode pour retrouver une suite de notes - Google Patents

Méthode pour retrouver une suite de notes Download PDF

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Publication number
EP1381024A1
EP1381024A1 EP02015381A EP02015381A EP1381024A1 EP 1381024 A1 EP1381024 A1 EP 1381024A1 EP 02015381 A EP02015381 A EP 02015381A EP 02015381 A EP02015381 A EP 02015381A EP 1381024 A1 EP1381024 A1 EP 1381024A1
Authority
EP
European Patent Office
Prior art keywords
tone
sequences
sequence
tone sequence
sound
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
Application number
EP02015381A
Other languages
German (de)
English (en)
Other versions
EP1381024B1 (fr
Inventor
Christoph Dr. Pörschmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Palm Inc
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP02015381A priority Critical patent/EP1381024B1/fr
Priority to AT02015381T priority patent/ATE455347T1/de
Priority to DE50214167T priority patent/DE50214167D1/de
Publication of EP1381024A1 publication Critical patent/EP1381024A1/fr
Application granted granted Critical
Publication of EP1381024B1 publication Critical patent/EP1381024B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/0033—Recording/reproducing or transmission of music for electrophonic musical instruments

Definitions

  • the invention relates to a method for finding a tone sequence, such as a piece of music or a ring tone sequence, in a tone sequence reference database, the reference tone sequences contains, due to a reproduced tone sequence.
  • Under a reproduced tone sequence is, for example a melody played by a person with their voice to understand.
  • the invention is based on the object to provide a method for finding a tone sequence, automatically based on a played sequence of tones can provide the desired reference tone sequence.
  • a reproduced tone sequence is generally both a complete sequence of tones that corresponds to a piece of music or Ringtone can correspond overall, but especially a tone sequence of any length within a piece of music or a ring tone understood.
  • the the latter case in practice the main use case be, for example, if a person has a special characteristic part of a musical piece-tone sequence hums or whistles to which she is looking for the entire piece of music.
  • tone sequence reference database There are pieces of music on the tone sequence reference database as tone sequences in the form of successive data Pitches and / or pitches. For this purpose you can common audio files with regard to their temporal Frequency curve can be analyzed with software support. Regarding the recorded, reproduced tone sequence in the prior art literature for determining a temporal frequency response, for example, a summed Tone sequence procedures like CEPSTRUM or Autocorrelation method known.
  • step c) won sequence of pitches and / or pitches in several, sound sequences connected under predetermined criteria divide. The same happens with the reference tone sequences, so that a comparison was made in step e) can be.
  • At least the Reference tone sequence with the most matches between Sound sequences and reference sound sequences output are the largest Matches to the sound sequences on the recorded sequence of tones.
  • step d) can be a Occurrence of pauses in the played sequence or also the consideration of periodicities, such as bars, in the reproduced tone sequence can be used.
  • a break in thus forms a reproduced tone sequence, for example a boundary between two sound sequences. Unless it is it is clear whether a sequence separation is to be carried out or not, both the individual sound sequences are preferred as also a composite sound sequence in the Comparison step e) used.
  • a similarity list can also be used in comparison step e) include the associations between each other contains similar reference sound sequences. As similar to each other For example, two sound sequences can be viewed, the in a sequence of tones only in one tone, the is characterized by its pitch and length, differ.
  • step g) Frequency curve from step b) with temporal reference frequency curves from a reference frequency response Database compared.
  • This database can be used with the above mentioned tone sequence reference database.
  • step g) the frequency course over time can be determined Step b) for comparison in terms of absolute Frequency values and / or its timeline systematically be modified. For example, if the one being played If the tone sequence is in an incorrect octave, the entire tone sequence in terms of a constant factor their frequency values shifted on a frequency scale become. If the sound sequence played is incorrect Speed, the entire frequency response can stretched or shortened in time, d. H. everyone Frequency value is changed from a time t to a time k x t shifted.
  • the frequency curves based on the reproduced tone sequences can be divided into frequency response sequences, where the criteria to split the criteria described above can correspond to a tone sequence in tone sequences. Then can the individual frequency response sequences one after the other can be compared with the reference frequency profiles.
  • a temporal resolution of the temporal Frequency characteristics is not sufficient to with adequate Probability to determine a desired tone sequence, it can be increased. In the opposite case, d. H. If empirically shows that a lower temporal Resolution is sufficient, it can also be reduced.
  • the tone sequence reference database becomes a reproduced tone sequence recorded, d. H. a desired one Tone sequence is reproduced by a sound source at which it is a human voice, but also an acoustic one Playback devices of any kind can act.
  • the recorded reproduced tone sequence a temporal frequency course of the Tone sequence determined.
  • a frequency curve over time is also referred to in the specialist literature as a "pitch structure" designated.
  • the in previous process step obtained sequence of tones under predetermined criteria in contiguous Sound sequences divided.
  • coherent Sound sequences can also be referred to as "acoustic motifs" become.
  • a split criterion for winning Tone sequences from tone sequences can cause pauses to occur his. Let pauses between two possible sound sequences not reliably determine, so both the undivided Sound sequence as well as the two divided sound sequences determined. For each sound sequence won, both the Pitch and pitch lengths standardized and saved.
  • tone sequence reference database Before comparing with reference tone sequences or sequences should be made on the part of a Tone sequence reference database the following features must be fulfilled:
  • tone sequence reference database is based on Figure 1 explains.
  • Tone sequence reference database are complete pieces of music or ringtone sequences as reference tone sequences R1, R2, R3 stored individually. They are in the form of Pitch sequences, pitch sequences or preferably in the form of successive tones represented by a pitch and a Tone length are marked in front.
  • Figure 1 are the For the sake of simplicity, only pitches within one octave, however no sound lengths are shown.
  • the tone sequence reference database also contains one Lexicon area 2, in which sound sequences contain # 1, # 2, # 3 are, which result from a division of the reference tone sequences R1, R2, R3 result under predetermined criteria. With these Criteria are preferably the same as those used to divide the sound sequences played become.
  • the tone sequence reference database also contains one Similarity list area 3, the mappings between Sound sequences # 1, # 2, # 3 from lexicon area 2 with regard to contains similarity.
  • the lexicon entries # 2 differ and # 3 just in one tone, so in that Similarity list area for tone sequence # 2 on the Sound sequence # 3 is referenced and vice versa.
  • the tone sequence reference database also contains one Hit list area 4, with the references between the Sound sequences # 1, # 2, # 3 from the lexicon area 2 and the Reference tone sequences R1, R2, R3 contains, the Includes information from the similarity list area 3 are. It goes without saying that the inclusion of the Similarity list is just a preferred feature, however not mandatory.
  • the hit list is used to determine for which reference tone sequence most matches between reproduced sound sequences and sound sequences # 1, # 2, # 3 the lexicon can be found.
  • the resulting one Reference tone sequence is most likely the wanted sequence of tones.
  • a hit list of Reference tone sequences result.
  • the entries in this hit list For example, the person who is looking for a tone sequence has been played, so the last one Definition of the desired reference tone sequence by this Person can be done.
  • a frequency frequency curve is compared, which is assigned to a reproduced tone sequence, with a Part or preferably an entire temporal frequency profile to a reference tone sequence.
  • FIG. 3 now shows a frequency course over time a reference tone sequence (curve K5) and a reproduced one temporal frequency response (curve K6) that already, like explained with reference to Figure 2 is modified.
  • the pitch [Hz] or the playback speed can each be multiplied by 2 x , where X is a positive real number.
  • the starting point of the tone sequence played can be in with respect to the reference tone sequence within the reference tone sequence can be varied.
  • any matches are z. B. with the help of a Error algorithm determined, in particular the Least squares error is determined.
  • a respective degree of agreement with the reproduced tone sequence recorded and saved. yield too many essentially due to this procedure equivalent hits, the resolution of the temporal Be enlarged over time.
  • the person who the reproduced tone sequence as a reference tone sequence can be in ascending order of the distance of the error criterion each suggested a reference tone sequence or also be played.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Auxiliary Devices For Music (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Electrophonic Musical Instruments (AREA)
EP02015381A 2002-07-10 2002-07-10 Méthode pour retrouver une suite de notes Expired - Lifetime EP1381024B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP02015381A EP1381024B1 (fr) 2002-07-10 2002-07-10 Méthode pour retrouver une suite de notes
AT02015381T ATE455347T1 (de) 2002-07-10 2002-07-10 Verfahren zum auffinden einer tonfolge
DE50214167T DE50214167D1 (de) 2002-07-10 2002-07-10 Verfahren zum Auffinden einer Tonfolge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02015381A EP1381024B1 (fr) 2002-07-10 2002-07-10 Méthode pour retrouver une suite de notes

Publications (2)

Publication Number Publication Date
EP1381024A1 true EP1381024A1 (fr) 2004-01-14
EP1381024B1 EP1381024B1 (fr) 2010-01-13

Family

ID=29724426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02015381A Expired - Lifetime EP1381024B1 (fr) 2002-07-10 2002-07-10 Méthode pour retrouver une suite de notes

Country Status (3)

Country Link
EP (1) EP1381024B1 (fr)
AT (1) ATE455347T1 (fr)
DE (1) DE50214167D1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5210820A (en) * 1990-05-02 1993-05-11 Broadcast Data Systems Limited Partnership Signal recognition system and method
US5402339A (en) * 1992-09-29 1995-03-28 Fujitsu Limited Apparatus for making music database and retrieval apparatus for such database
US5874686A (en) * 1995-10-31 1999-02-23 Ghias; Asif U. Apparatus and method for searching a melody
EP0944033A1 (fr) * 1998-03-19 1999-09-22 Tomonari Sonoda Dispositif et méthode pour la recherche de mélodies
WO2001069575A1 (fr) * 2000-03-13 2001-09-20 Perception Digital Technology (Bvi) Limited Systeme d'extraction de melodie

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5210820A (en) * 1990-05-02 1993-05-11 Broadcast Data Systems Limited Partnership Signal recognition system and method
US5402339A (en) * 1992-09-29 1995-03-28 Fujitsu Limited Apparatus for making music database and retrieval apparatus for such database
US5874686A (en) * 1995-10-31 1999-02-23 Ghias; Asif U. Apparatus and method for searching a melody
EP0944033A1 (fr) * 1998-03-19 1999-09-22 Tomonari Sonoda Dispositif et méthode pour la recherche de mélodies
WO2001069575A1 (fr) * 2000-03-13 2001-09-20 Perception Digital Technology (Bvi) Limited Systeme d'extraction de melodie

Also Published As

Publication number Publication date
DE50214167D1 (de) 2010-03-04
ATE455347T1 (de) 2010-01-15
EP1381024B1 (fr) 2010-01-13

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