GB2247980B - Method for detecting the pitch of an analogue signal - Google Patents
Method for detecting the pitch of an analogue signalInfo
- Publication number
- GB2247980B GB2247980B GB9117593A GB9117593A GB2247980B GB 2247980 B GB2247980 B GB 2247980B GB 9117593 A GB9117593 A GB 9117593A GB 9117593 A GB9117593 A GB 9117593A GB 2247980 B GB2247980 B GB 2247980B
- Authority
- GB
- United Kingdom
- Prior art keywords
- pitch
- signal
- fourier transform
- frequency components
- detecting
- 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.)
- Expired - Lifetime
Links
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
- G10H3/00—Instruments in which the tones are generated by electromechanical means
- G10H3/12—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument
- G10H3/125—Extracting or recognising the pitch or fundamental frequency of the picked up signal
-
- 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
- G10H7/00—Instruments in which the tones are synthesised from a data store, e.g. computer organs
- G10H7/08—Instruments in which the tones are synthesised from a data store, e.g. computer organs by calculating functions or polynomial approximations to evaluate amplitudes at successive sample points of a tone waveform
- G10H7/10—Instruments in which the tones are synthesised from a data store, e.g. computer organs by calculating functions or polynomial approximations to evaluate amplitudes at successive sample points of a tone waveform using coefficients or parameters stored in a memory, e.g. Fourier coefficients
- G10H7/105—Instruments in which the tones are synthesised from a data store, e.g. computer organs by calculating functions or polynomial approximations to evaluate amplitudes at successive sample points of a tone waveform using coefficients or parameters stored in a memory, e.g. Fourier coefficients using Fourier coefficients
-
- 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
- G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
- G10H2210/031—Musical analysis, i.e. isolation, extraction or identification of musical elements or musical parameters from a raw acoustic signal or from an encoded audio signal
- G10H2210/066—Musical analysis, i.e. isolation, extraction or identification of musical elements or musical parameters from a raw acoustic signal or from an encoded audio signal for pitch analysis as part of wider processing for musical purposes, e.g. transcription, musical performance evaluation; Pitch recognition, e.g. in polyphonic sounds; Estimation or use of missing fundamental
-
- 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
- G10H2250/00—Aspects of algorithms or signal processing methods without intrinsic musical character, yet specifically adapted for or used in electrophonic musical processing
- G10H2250/055—Filters for musical processing or musical effects; Filter responses, filter architecture, filter coefficients or control parameters therefor
- G10H2250/105—Comb filters
-
- 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
- G10H2250/00—Aspects of algorithms or signal processing methods without intrinsic musical character, yet specifically adapted for or used in electrophonic musical processing
- G10H2250/131—Mathematical functions for musical analysis, processing, synthesis or composition
- G10H2250/215—Transforms, i.e. mathematical transforms into domains appropriate for musical signal processing, coding or compression
- G10H2250/235—Fourier transform; Discrete Fourier Transform [DFT]; Fast Fourier Transform [FFT]
-
- 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
- G10H2250/00—Aspects of algorithms or signal processing methods without intrinsic musical character, yet specifically adapted for or used in electrophonic musical processing
- G10H2250/131—Mathematical functions for musical analysis, processing, synthesis or composition
- G10H2250/261—Window, i.e. apodization function or tapering function amounting to the selection and appropriate weighting of a group of samples in a digital signal within some chosen time interval, outside of which it is zero valued
- G10H2250/281—Hamming window
-
- 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
- G10H2250/00—Aspects of algorithms or signal processing methods without intrinsic musical character, yet specifically adapted for or used in electrophonic musical processing
- G10H2250/541—Details of musical waveform synthesis, i.e. audio waveshape processing from individual wavetable samples, independently of their origin or of the sound they represent
- G10H2250/571—Waveform compression, adapted for music synthesisers, sound banks or wavetables
- G10H2250/601—Compressed representations of spectral envelopes, e.g. LPC [linear predictive coding], LAR [log area ratios], LSP [line spectral pairs], reflection coefficients
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Multimedia (AREA)
- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Optimization (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Analysis (AREA)
- Algebra (AREA)
- Electrophonic Musical Instruments (AREA)
- Auxiliary Devices For Music (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
A method for processing a digital signal produced by digitizing an analog signal such as a musical instrument sound signal. The fundamental frequency or pitch is detected by performing Fourier transform to produce frequency components, phase matching these frequency components and performing inverse Fourier transform. By applying the signal processing method to a sound source data forming apparatus, sound source data may be formed which is reduced in the looping noise and error caused by data compression and which is of superior sound quality. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9117593A GB2247980B (en) | 1988-11-19 | 1991-08-14 | Method for detecting the pitch of an analogue signal |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63292932A JP2876604B2 (en) | 1988-11-19 | 1988-11-19 | Signal compression method |
JP63292940A JP2864508B2 (en) | 1988-11-19 | 1988-11-19 | Waveform data compression encoding method and apparatus |
GB9117593A GB2247980B (en) | 1988-11-19 | 1991-08-14 | Method for detecting the pitch of an analogue signal |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9117593D0 GB9117593D0 (en) | 1991-10-02 |
GB2247980A GB2247980A (en) | 1992-03-18 |
GB2247980B true GB2247980B (en) | 1993-06-23 |
Family
ID=27265814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9117593A Expired - Lifetime GB2247980B (en) | 1988-11-19 | 1991-08-14 | Method for detecting the pitch of an analogue signal |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2247980B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1339256B1 (en) * | 2003-03-03 | 2017-12-27 | Sonova AG | Method for manufacturing acoustical devices and for reducing wind disturbances |
-
1991
- 1991-08-14 GB GB9117593A patent/GB2247980B/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB2247980A (en) | 1992-03-18 |
GB9117593D0 (en) | 1991-10-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB2230132B (en) | Signal recording method | |
US3725561A (en) | Method of electrically reproducing music and improved electrical pickup for practicing the same | |
DE3360264D1 (en) | Position measuring method and device for performing this method | |
EP0301790A3 (en) | Biopotential digital controller for music and video applications | |
Virtanen et al. | Separation of harmonic sounds using multipitch analysis and iterative parameter estimation | |
KR960032298A (en) | Method and apparatus for speech synthesis using reproduction phase information | |
JPS58100199A (en) | Voice recognition and reproduction method and apparatus | |
EP0113257A3 (en) | Musical note display device | |
ATE62367T1 (en) | METHOD AND DEVICE FOR RECORDING AND/OR REPRODUCTION OF A VIDEO SIGNAL AND AN RELATED SOUND SIGNAL ON A RECORDING CARRIER AND RECORDING CARRIER, OBTAINED BY MEANS OF THIS METHOD. | |
NO924110L (en) | SYSTEM FOR AA GENERATE CORRECTION SIGNALS FOR USE IN THE CREATION OF ANALOGUE SIGNALS WHICH HAVE LOW DISTORTION | |
DE68927284D1 (en) | Musical instrument with an electroacoustic transducer for generating a musical tone | |
KR20020070374A (en) | Parametric coding of audio signals | |
KR20010072906A (en) | Method and apparatus for separation of impulsive and non-impulsive components in a signal | |
TW418384B (en) | Voice pitch conversion device | |
US4433434A (en) | Method and apparatus for time domain compression and synthesis of audible signals | |
CA2053545A1 (en) | Method and apparatus for producing an electronic representation of a musical sound using coerced harmonics | |
GB2247980B (en) | Method for detecting the pitch of an analogue signal | |
JPS55111995A (en) | Method and device for voice synthesis | |
McAulay et al. | Sine-wave phase coding at low data rates | |
CA1319994C (en) | Speech analysis method | |
GB9117591D0 (en) | Signal processing method | |
GB2247981B (en) | Method for producing a digital signal | |
NO914105L (en) | PROCEDURE AND DEVICE FOR CODING AND DECODING ANALOGUE SIGNALS | |
GB2247979B (en) | Sound data forming apparatus | |
Fitz et al. | Extending the McAulay-Quatieri Analysis for Synthesis with a Limited Number of Oscillators |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
PE20 | Patent expired after termination of 20 years |
Expiry date: 20091115 |