EP0052120A1 - Ameliorations au traitement de signaux - Google Patents
Ameliorations au traitement de signauxInfo
- Publication number
- EP0052120A1 EP0052120A1 EP81901295A EP81901295A EP0052120A1 EP 0052120 A1 EP0052120 A1 EP 0052120A1 EP 81901295 A EP81901295 A EP 81901295A EP 81901295 A EP81901295 A EP 81901295A EP 0052120 A1 EP0052120 A1 EP 0052120A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coefficients
- data
- filter
- pef
- order
- 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.)
- Withdrawn
Links
- 238000001228 spectrum Methods 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 39
- 230000008569 process Effects 0.000 claims abstract description 9
- 230000002238 attenuated effect Effects 0.000 claims description 6
- 239000000872 buffer Substances 0.000 abstract description 8
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- 230000003595 spectral effect Effects 0.000 description 18
- 230000000694 effects Effects 0.000 description 11
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- 238000002955 isolation Methods 0.000 description 6
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Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/48—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
- G10L25/12—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being prediction coefficients
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
- G10L25/15—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being formant information
Definitions
- a more sophisticated time domain approach used in the analysis of speech and of which the invention is a special case, is the linear prediction method. Under this method, successive time segments of the signal are each assumed to be the outcome of a stationary autoregressive random process.
- PEF prediction error filter
- Another simplification is to compute each variance or covariance recursively, viz:
Landscapes
- Engineering & Computer Science (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
Procede et appareil de traitement de donnees par prediction lineaire. Les coefficients du filtre d'erreur de prediction de second ordre (PEF) pour les donnees sont estimes dans un estimateur PEF (14) de maniere a avoisiner la paire de coefficients d'un binome de la transformation z d'une sequence de coefficients PEF d'un ordre superieur des donnees. La paire de coefficients du binome est associee a un formant dans le spectre des donnees. Les coefficients PEF sont utilises pour commander des filtres (11, 12, 13) de maniere a modifier le spectre des donnees selon les changements se produisant dans les donnees. L'estimateur (14) et le dispositif de filtres (11, 12, 13) est effectivement un filtre d'adaptation de donnees. Un procede d'approximation successive est utilise pour isoler le formant principal et pour l'attenuer dans un courant de donnees qui est transmis a un autre module semblable en cascade dans l'appareil de maniere a effectuer le meme procede pour isoler et enlever un autre formant. Des tampons (17- 20) contiennent ainsi des paires de coefficients PEF associes a chaque formant dans les donnees d'entree.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU3605/80 | 1980-05-19 | ||
| AUPE360580 | 1980-05-19 | ||
| AUPE555680 | 1980-09-12 | ||
| AU5556/80 | 1980-09-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0052120A1 true EP0052120A1 (fr) | 1982-05-26 |
| EP0052120A4 EP0052120A4 (fr) | 1983-12-09 |
Family
ID=25642381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19810901295 Withdrawn EP0052120A4 (fr) | 1980-05-19 | 1981-05-18 | Ameliorations au traitement de signaux. |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0052120A4 (fr) |
| JP (1) | JPS57500901A (fr) |
| BR (1) | BR8108616A (fr) |
| DK (1) | DK21282A (fr) |
| WO (1) | WO1981003392A1 (fr) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3296374A (en) * | 1963-06-28 | 1967-01-03 | Ibm | Speech analyzing system |
| US3327057A (en) * | 1963-11-08 | 1967-06-20 | Bell Telephone Labor Inc | Speech analysis |
| US3335225A (en) * | 1964-02-20 | 1967-08-08 | Melpar Inc | Formant period tracker |
| US3369076A (en) * | 1964-05-18 | 1968-02-13 | Ibm | Formant locating system |
| US3649765A (en) * | 1969-10-29 | 1972-03-14 | Bell Telephone Labor Inc | Speech analyzer-synthesizer system employing improved formant extractor |
| US4032711A (en) * | 1975-12-31 | 1977-06-28 | Bell Telephone Laboratories, Incorporated | Speaker recognition arrangement |
| US4092493A (en) * | 1976-11-30 | 1978-05-30 | Bell Telephone Laboratories, Incorporated | Speech recognition system |
| US4220819A (en) * | 1979-03-30 | 1980-09-02 | Bell Telephone Laboratories, Incorporated | Residual excited predictive speech coding system |
-
1981
- 1981-05-18 JP JP50158381A patent/JPS57500901A/ja active Pending
- 1981-05-18 BR BR8108616A patent/BR8108616A/pt unknown
- 1981-05-18 EP EP19810901295 patent/EP0052120A4/fr not_active Withdrawn
- 1981-05-18 WO PCT/AU1981/000060 patent/WO1981003392A1/fr not_active Application Discontinuation
-
1982
- 1982-01-19 DK DK21282A patent/DK21282A/da not_active Application Discontinuation
Non-Patent Citations (2)
| Title |
|---|
| IEEE TRANSACTIONS ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, vol. ASSP-26, no. 6, December 1978, NEW YORK (US) * |
| See also references of WO8103392A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DK21282A (da) | 1982-01-19 |
| BR8108616A (pt) | 1982-04-06 |
| WO1981003392A1 (fr) | 1981-11-26 |
| JPS57500901A (fr) | 1982-05-20 |
| EP0052120A4 (fr) | 1983-12-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): AT CH DE FR GB NL SE |
|
| 17P | Request for examination filed |
Effective date: 19820524 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Withdrawal date: 19840525 |