DE3467650D1 - Channel vocoder comprising means for suppressing parasitic modulation of the synthesized speech signal - Google Patents
Channel vocoder comprising means for suppressing parasitic modulation of the synthesized speech signalInfo
- Publication number
- DE3467650D1 DE3467650D1 DE8484400744T DE3467650T DE3467650D1 DE 3467650 D1 DE3467650 D1 DE 3467650D1 DE 8484400744 T DE8484400744 T DE 8484400744T DE 3467650 T DE3467650 T DE 3467650T DE 3467650 D1 DE3467650 D1 DE 3467650D1
- Authority
- DE
- Germany
- Prior art keywords
- signal
- synthesis
- input
- subtractor
- channel
- 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
Links
- 230000003071 parasitic effect Effects 0.000 title 1
- 230000015572 biosynthetic process Effects 0.000 abstract 10
- 238000003786 synthesis reaction Methods 0.000 abstract 10
- 230000005284 excitation Effects 0.000 abstract 3
- 238000000605 extraction Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 238000011002 quantification Methods 0.000 abstract 1
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
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Amplitude Modulation (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
1. Synthesis subassembly of a channel vocoder including a means (36) of reception and extraction of the data in a frame, a means (38) of producing an excitation signal, the said synthesis subassembly including : - _n synthesis channels (45) numbered from 1 to _n, each including a bandpass filter (48) and a means of energy measurement (50, 52) for measuring the energy contained in the said band, the said synthesis channels receiving on input the excitation signal coming from the means (38) of producing the excitation signal, - at least one subtractor (62) receiving on a first input the energy signal delivered by a synthesis channel and on a second input the signal coming from the means of reception (36) and representing the energy signal delivered by the corresponding analysis channel and delivering a signal expressing the signed difference between the two signals applied on input, - at least one modulator (46) associated with the subtractor, of which the input which controls the gain receives the signal delivered by the subtractor, the said synthesis subassembly being characterized in that the synthesis channels (45), the subtractor or subtractors (62) and the associated modulator or modulators (46) are arranged in cascade in this order and constitute an open loop circuit, the synthesis subassembly being arranged such that it includes at least one means of signal processing (63) including a subtractor (62) and its associated modulator (46), the said means of processing (63) including a quantification and coding circuit (56) which receives on input the energy signal from a synthesis channel (45) in order to deliver to one of the inputs of the subtractor a quantified and coded energy signal, the other input of the subtractor receiving the energy signal coming from the means of reception and delivered by the corresponding analysis channel, the modulator receiving on its signal to be modulated input the output signal from the band pass filter of the synthesis channel.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8306471A FR2544901B1 (en) | 1983-04-20 | 1983-04-20 | CHANNEL VOCODER PROVIDED WITH MEANS FOR COMPENSATING FOR PARASITIC MODULATIONS OF THE SYNTHETIC SPEECH SIGNAL |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3467650D1 true DE3467650D1 (en) | 1987-12-23 |
Family
ID=9288045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE8484400744T Expired DE3467650D1 (en) | 1983-04-20 | 1984-04-13 | Channel vocoder comprising means for suppressing parasitic modulation of the synthesized speech signal |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0124411B1 (en) |
| DE (1) | DE3467650D1 (en) |
| FR (1) | FR2544901B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4325354C1 (en) * | 1993-07-28 | 1994-08-25 | Siemens Ag | Method and arrangement for outputting digital speech signals |
| US5715365A (en) * | 1994-04-04 | 1998-02-03 | Digital Voice Systems, Inc. | Estimation of excitation parameters |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2672512A (en) * | 1949-02-02 | 1954-03-16 | Bell Telephone Labor Inc | System for analyzing and synthesizing speech |
| US2996579A (en) * | 1960-01-13 | 1961-08-15 | Gen Dynamics Corp | Feedback vocoder |
| US3252105A (en) * | 1962-06-07 | 1966-05-17 | Honeywell Inc | Rate limiting apparatus including active elements |
| US3346695A (en) * | 1963-05-07 | 1967-10-10 | Gunnar Fant | Vocoder system |
| AT251655B (en) * | 1964-10-01 | 1967-01-10 | Ibm Oesterreich Internationale | Channel vocoder |
| AT276495B (en) * | 1967-08-03 | 1969-11-25 | Ibm Oesterreich Internationale | Method for multiplex speech synthesis |
| GB2002611B (en) * | 1977-08-05 | 1982-03-17 | Brown Ltd S | Electric circuit device and pendulum unit incorporating such devices |
-
1983
- 1983-04-20 FR FR8306471A patent/FR2544901B1/en not_active Expired
-
1984
- 1984-04-13 DE DE8484400744T patent/DE3467650D1/en not_active Expired
- 1984-04-13 EP EP19840400744 patent/EP0124411B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2544901A1 (en) | 1984-10-26 |
| EP0124411A1 (en) | 1984-11-07 |
| FR2544901B1 (en) | 1986-02-21 |
| EP0124411B1 (en) | 1987-11-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |