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US5763802A
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Apparatus for chord analysis based on harmonic tone information derived from sound pattern and tone pitch relationships
Assignee: Yamaha Corp
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Filing: 1996-09-25
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Granted: 1998-06-09
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Expires: 2016-09-25
Abstract
Abstract A chord analysis apparatus which includes a table memory for memorizing a plurality of sound timing patterns in a performance section of a predetermined number of beats, a plurality of tone pitch difference patterns corresponding with the sound timing patterns and a plurality of harmonic tone information data corresponding with the tone pitch difference patterns. In the tone pitch difference patterns, each difference in tone pitch between adjacent tones is represented by the number of semitones. After a performance information data of a desired musical tune has been divided each at two times, a pattern corresponding with the sound timing and tone pitch difference patterns in each divided section is searched at the table memory to read out a harmonic tone information data corresponding with the searched pattern thereby to detect each chord of the divided sections based thereon.
Inventors
- 👤 Eiichiro Aoki
- 👤 Kazunori Maruyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:05
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/36; G10H1/38; G10H2210/00; G10H2210/555; G10H2210/565; G10H2210/571; G10H2210/616; Y; Y10; Y10S; Y10S84/00; Y10S84/22
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
149 words
A chord analysis apparatus, comprising: memory means for memorizing a plurality of information data patterns, each indicative of a sound timing and a tone pitch relationship in a performance section of a predetermined number of beats, and for memorizing harmonic tone information data corresponding to each of said information data patterns; search means for searching said plurality of information data patterns to find a corresponding information data pattern from said plurality of information data patterns that corresponds with a sound timing and a tone pitch relationship in performance information data representative of a section of a musical tune; means for reading out harmonic tone information data corresponding to the information data pattern found by said search means from said memory means; and means for defining at least one chord of the section of the musical tune based on the harmonic tone information data read out from the memory means.
Claim 2
Dependent Claim
149 words
A chord analysis apparatus, comprising: memory means for memorizing a plurality of information data patterns, each indicative of a sound timing and a tone pitch relationship in a performance section of a predetermined number of beats, and for memorizing harmonic tone information data corresponding to each of said information data patterns; search means for searching said plurality of information data patterns to find a corresponding information data pattern from said plurality of information data patterns that corresponds with a sound timing and a tone pitch relationship in performance information data representative of a section of a musical tune; means for reading out harmonic tone information data corresponding to the information data pattern found by said search means from said memory means; and means for defining at least one chord of the section of the musical tune based on the harmonic tone information data read out from the memory means.
Claim 3
Dependent Claim
32 words
A chord analysis apparatus as claimed in claim 1, wherein each information data pattern comprises a sound timing pattern and a tone pitch difference pattern that corresponds to the sound timing pattern.
Claim 4
Dependent Claim
49 words
A chord analysis apparatus as claimed in claim 1, wherein each information data pattern comprises a sound pattern, and wherein at least one sound pattern of at least one information data pattern includes information data of a difference in tone pitch between a head tone and a following tone.
Claim 5
Dependent Claim
31 words
A chord analysis apparatus as claimed in claim 1, further comprising means for memorizing a plurality of chord names and tone name information data corresponding to each of the chord names.
Claim 6
Dependent Claim
46 words
A chord analysis apparatus as claimed claim 4, wherein the means for detecting matches the harmonic tone information data read out from the memory means to the memorized tone name information data to identify the at least one chord of the section of the musical tune.
Claim 7
Dependent Claim
164 words
A chord analysis apparatus, comprising: memory means for memorizing a plurality of information data patterns, each indicative of a sound timing and a tone pitch relationship in a performance section of a predetermined number of beats, and for memorizing harmonic tone information data corresponding to each of the information data patterns; means for dividing performance information data of a musical tune into a plurality of sections of the predetermined number of beats; search means for searching said plurality of information data patterns to find a corresponding information data pattern from said plurality of information data patterns that corresponds with a sound timing and a tone pitch relationship in each divided section; read-out means for reading out harmonic tone information data corresponding to the information data pattern found by said search means for each divided section from said memory means; and chord determination means for determining each chord of the divided sections based on the harmonic tone information data read out by said read-out means.
Claim 8
Dependent Claim
164 words
A chord analysis apparatus, comprising: memory means for memorizing a plurality of information data patterns, each indicative of a sound timing and a tone pitch relationship in a performance section of a predetermined number of beats, and for memorizing harmonic tone information data corresponding to each of the information data patterns; means for dividing performance information data of a musical tune into a plurality of sections of the predetermined number of beats; search means for searching said plurality of information data patterns to find a corresponding information data pattern from said plurality of information data patterns that corresponds with a sound timing and a tone pitch relationship in each divided section; read-out means for reading out harmonic tone information data corresponding to the information data pattern found by said search means for each divided section from said memory means; and chord determination means for determining each chord of the divided sections based on the harmonic tone information data read out by said read-out means.
Claim 9
Dependent Claim
32 words
A chord analysis apparatus as claimed in claim 6, wherein each information data pattern comprises a sound timing pattern and a tone pitch difference pattern that corresponds to the sound timing pattern.
Claim 10
Dependent Claim
49 words
A chord analysis apparatus as claimed in claim 6, wherein each information data pattern comprises a sound pattern, and wherein at least one sound pattern of at least one information data pattern includes information data of a difference in tone pitch between a head tone and a following tone.
Claim 11
Dependent Claim
31 words
A chord analysis apparatus as claimed in claim 6, further comprising means for memorizing a plurality of chord names and tone name information data corresponding to each of the chord names.
Claim 12
Dependent Claim
52 words
A chord analysis apparatus as claimed claim 9, further comprising chord detection means for matching the harmonic tone information data read out by the read-out means from the memory means to the memorized tone name information data to define at least one detected chord for each divided section of the musical tune.
Claim 13
Dependent Claim
47 words
A chord analysis apparatus as claimed in claim 10, wherein the chord detection means further comprises chord definition means for defining for each of the divided sections at least one of a chord and a plurality of candidate chords based on the at least one detected chord.
Claim 14
Dependent Claim
69 words
A chord analysis apparatus as claimed in claim 10, wherein the chord determination means, for a divided section that is the final section of the musical tone and for which the chord defining means has defined a plurality of candidate chords, selects the candidate cord of highest priority order in a key of the musical tune from the plurality of candidate chords as a chord of the final section.
Claim 15
Independent Claim
153 words
A method of determining a chord in accordance with progression of a musical tone, comprising the steps of: memorizing a plurality of information data patterns, each indicative of a sound timing and a tone pitch relationship in a performance section of a predetermined number of beats; memorizing harmonic tone information data corresponding to each of the information data patterns; dividing performance information data of a musical tune into a plurality of sections of the predetermined number of beats; searching said plurality of information data patterns to find a corresponding information data pattern from said plurality of information data patterns that corresponds with a sound timing and a tone pitch relationship in each divided section; reading out harmonic tone information data corresponding to information data pattern found by said search means for each divided section from said memory means; and determining each chord of the divided sections based on the harmonic tone information data.
Claim 16
Independent Claim
153 words
A method of determining a chord in accordance with progression of a musical tone, comprising the steps of: memorizing a plurality of information data patterns, each indicative of a sound timing and a tone pitch relationship in a performance section of a predetermined number of beats; memorizing harmonic tone information data corresponding to each of the information data patterns; dividing performance information data of a musical tune into a plurality of sections of the predetermined number of beats; searching said plurality of information data patterns to find a corresponding information data pattern from said plurality of information data patterns that corresponds with a sound timing and a tone pitch relationship in each divided section; reading out harmonic tone information data corresponding to information data pattern found by said search means for each divided section from said memory means; and determining each chord of the divided sections based on the harmonic tone information data.
Claim 17
Dependent Claim
30 words
A method as claimed in claim 13, wherein each information data pattern comprises a sound timing pattern and a tone pitch difference pattern that corresponds to the sound timing pattern.
Claim 18
Dependent Claim
47 words
A method as claimed in claim 13, wherein each information data pattern comprises a sound pattern, and wherein at least one sound pattern of at least one information data pattern includes information data of a difference in tone pitch between a head tone and a following tone.
Claim 19
Dependent Claim
27 words
A method as claimed in claim 13, further comprising memorizing a plurality of chord names and tone name information data corresponding to each of the chord names.
Claim 20
Dependent Claim
38 words
A method as claimed in claim 16, further comprising matching the harmonic tone information data read out the memorized tone name information data to define at least one detected chord for each divided section of the musical tune.
Claim 21
Dependent Claim
36 words
A method as claimed in claim 17, further comprising defining for each of the divided sections at least one of a chord and a plurality of candidate chords based on the at least one detected chord.
Claim 22
Dependent Claim
61 words
A method as claimed in claim 18, further comprising, for a divided section that is the final section of the musical tone and for which a plurality of candidate chords has been defined, selecting the candidate cord of highest priority order in a key of the musical tune from the plurality of candidate chords as a chord of the final section.
Claim 23
Dependent Claim
145 words
A machine readable media programmed to execute the steps of: memorizing a plurality of information data patterns, each indicative of a sound timing and a tone pitch relationship in a performance section of a predetermined number of beats; memorizing harmonic tone information data corresponding to each of the information data patterns; dividing performance information data of a musical tune into a plurality of sections of the predetermined number of beats; searching said plurality of information data patterns to find a corresponding information data pattern from said plurality of information data patterns that corresponds with a sound timing and a tone pitch relationship in each divided section; reading out harmonic tone information data corresponding to information data pattern found by said search means for each divided section from said memory means; and determining each chord of the divided sections based on the harmonic tone information data.
Claim 24
Dependent Claim
145 words
A machine readable media programmed to execute the steps of: memorizing a plurality of information data patterns, each indicative of a sound timing and a tone pitch relationship in a performance section of a predetermined number of beats; memorizing harmonic tone information data corresponding to each of the information data patterns; dividing performance information data of a musical tune into a plurality of sections of the predetermined number of beats; searching said plurality of information data patterns to find a corresponding information data pattern from said plurality of information data patterns that corresponds with a sound timing and a tone pitch relationship in each divided section; reading out harmonic tone information data corresponding to information data pattern found by said search means for each divided section from said memory means; and determining each chord of the divided sections based on the harmonic tone information data.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-08 | 2001-12-08 | 2002-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-08 | 2005-12-08 | 2006-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-08 | 2009-12-08 | 2010-06-09 | $7700.00 | Window Closed / Lapsed |