SE323721B - - Google Patents
Info
- Publication number
- SE323721B SE323721B SE4042/66A SE404266A SE323721B SE 323721 B SE323721 B SE 323721B SE 4042/66 A SE4042/66 A SE 4042/66A SE 404266 A SE404266 A SE 404266A SE 323721 B SE323721 B SE 323721B
- Authority
- SE
- Sweden
- Prior art keywords
- channel
- unvoiced
- voiced
- pass filter
- integrator circuit
- Prior art date
Links
- 238000001228 spectrum Methods 0.000 abstract 2
- 238000010183 spectrum analysis Methods 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 abstract 1
- 230000010354 integration Effects 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)
- Meter Arrangements (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Machine Translation (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT275665A AT251656B (de) | 1965-03-25 | 1965-03-25 | Verfahren und Anordnungen zur Verbesserung der Sprachqualität in Vocodersystemen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE323721B true SE323721B (nl) | 1970-05-11 |
Family
ID=3539787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE4042/66A SE323721B (nl) | 1965-03-25 | 1966-03-25 |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3431355A (nl) |
| AT (1) | AT251656B (nl) |
| BE (1) | BE677136A (nl) |
| CH (1) | CH443413A (nl) |
| DE (1) | DE1276740B (nl) |
| ES (1) | ES324621A1 (nl) |
| FR (1) | FR1471628A (nl) |
| GB (1) | GB1073203A (nl) |
| NL (1) | NL146672B (nl) |
| SE (1) | SE323721B (nl) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL84948A0 (en) * | 1987-12-25 | 1988-06-30 | D S P Group Israel Ltd | Noise reduction system |
| EP0553906B1 (en) * | 1992-01-21 | 1998-04-08 | Koninklijke Philips Electronics N.V. | Method and apparatus for sound enhancement with envelopes of multiband passed signals feeding comb filters |
| US5768473A (en) * | 1995-01-30 | 1998-06-16 | Noise Cancellation Technologies, Inc. | Adaptive speech filter |
| US6108610A (en) * | 1998-10-13 | 2000-08-22 | Noise Cancellation Technologies, Inc. | Method and system for updating noise estimates during pauses in an information signal |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3012098A (en) * | 1941-11-22 | 1961-12-05 | Bell Telephone Labor Inc | Telephone privacy |
| US2810787A (en) * | 1952-05-22 | 1957-10-22 | Itt | Compressed frequency communication system |
| US3102928A (en) * | 1960-12-23 | 1963-09-03 | Bell Telephone Labor Inc | Vocoder excitation generator |
| US3261916A (en) * | 1962-11-16 | 1966-07-19 | Ibm | Adjustable recognition system |
-
1965
- 1965-03-25 AT AT275665A patent/AT251656B/de active
- 1965-04-05 US US445563A patent/US3431355A/en not_active Expired - Lifetime
-
1966
- 1966-02-28 BE BE677136D patent/BE677136A/xx unknown
- 1966-03-07 CH CH323466A patent/CH443413A/de unknown
- 1966-03-08 NL NL666602974A patent/NL146672B/nl unknown
- 1966-03-11 DE DEJ30298A patent/DE1276740B/de not_active Withdrawn
- 1966-03-15 GB GB11188/66A patent/GB1073203A/en not_active Expired
- 1966-03-17 FR FR53804A patent/FR1471628A/fr not_active Expired
- 1966-03-24 ES ES0324621A patent/ES324621A1/es not_active Expired
- 1966-03-25 SE SE4042/66A patent/SE323721B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ES324621A1 (es) | 1967-02-01 |
| BE677136A (fr) | 1966-07-18 |
| CH443413A (de) | 1967-09-15 |
| NL146672B (nl) | 1975-07-15 |
| FR1471628A (fr) | 1967-03-03 |
| DE1276740B (de) | 1968-09-05 |
| GB1073203A (en) | 1967-06-21 |
| NL6602974A (nl) | 1966-09-26 |
| AT251656B (de) | 1967-01-10 |
| US3431355A (en) | 1969-03-04 |
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