CA2105387A1 - Codeur de paroles a debit binaire variable - Google Patents
Codeur de paroles a debit binaire variableInfo
- Publication number
- CA2105387A1 CA2105387A1 CA002105387A CA2105387A CA2105387A1 CA 2105387 A1 CA2105387 A1 CA 2105387A1 CA 002105387 A CA002105387 A CA 002105387A CA 2105387 A CA2105387 A CA 2105387A CA 2105387 A1 CA2105387 A1 CA 2105387A1
- Authority
- CA
- Canada
- Prior art keywords
- sample
- samples
- estimate
- signal
- noise
- 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.)
- Abandoned
Links
- 238000013139 quantization Methods 0.000 claims abstract description 78
- 238000000034 method Methods 0.000 claims abstract description 47
- 230000003595 spectral effect Effects 0.000 claims description 84
- 230000000875 corresponding effect Effects 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000010606 normalization Methods 0.000 claims description 10
- 230000002238 attenuated effect Effects 0.000 claims description 2
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims 1
- 238000001228 spectrum Methods 0.000 abstract description 17
- 238000004891 communication Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- 230000004044 response Effects 0.000 description 5
- 230000005236 sound signal Effects 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 101000802640 Homo sapiens Lactosylceramide 4-alpha-galactosyltransferase Proteins 0.000 description 1
- 102100035838 Lactosylceramide 4-alpha-galactosyltransferase Human genes 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 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
- G10L19/04—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 predictive techniques
- G10L19/16—Vocoder architecture
- G10L19/18—Vocoders using multiple modes
- G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (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)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US66457991A | 1991-03-05 | 1991-03-05 | |
| US66594891A | 1991-03-06 | 1991-03-06 | |
| US665,948 | 1991-03-06 | ||
| US664,579 | 1991-03-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2105387A1 true CA2105387A1 (fr) | 1992-09-06 |
Family
ID=27099005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002105387A Abandoned CA2105387A1 (fr) | 1991-03-05 | 1992-03-04 | Codeur de paroles a debit binaire variable |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0574523B1 (fr) |
| JP (1) | JP3130934B2 (fr) |
| CA (1) | CA2105387A1 (fr) |
| DE (1) | DE69229627T2 (fr) |
| WO (1) | WO1992015986A1 (fr) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5450130A (en) * | 1994-03-30 | 1995-09-12 | Radius Inc. | Method and system for cell based image data compression |
| US6707827B1 (en) | 1999-11-12 | 2004-03-16 | Siemens Information & Communication Networks, Inc. | Method and apparatus for optimizing audio response in telephony-over-LAN systems |
| DE10052626A1 (de) * | 2000-10-24 | 2002-05-02 | Alcatel Sa | Adaptiver Geräuschpegelschätzer |
| EP2226794B1 (fr) * | 2009-03-06 | 2017-11-08 | Harman Becker Automotive Systems GmbH | Estimation du bruit de fond |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4696040A (en) * | 1983-10-13 | 1987-09-22 | Texas Instruments Incorporated | Speech analysis/synthesis system with energy normalization and silence suppression |
| GB8421498D0 (en) * | 1984-08-24 | 1984-09-26 | British Telecomm | Frequency domain speech coding |
| EP0309974B1 (fr) * | 1987-09-30 | 1992-03-11 | Deutsche Thomson-Brandt GmbH | Procédé pour transmettre un signal audible |
| US4991213A (en) * | 1988-05-26 | 1991-02-05 | Pacific Communication Sciences, Inc. | Speech specific adaptive transform coder |
| US4964166A (en) * | 1988-05-26 | 1990-10-16 | Pacific Communication Science, Inc. | Adaptive transform coder having minimal bit allocation processing |
| US4965830A (en) * | 1989-01-17 | 1990-10-23 | Unisys Corp. | Apparatus for estimating distortion resulting from compressing digital data |
| US5042069A (en) * | 1989-04-18 | 1991-08-20 | Pacific Communications Sciences, Inc. | Methods and apparatus for reconstructing non-quantized adaptively transformed voice signals |
| US5040217A (en) * | 1989-10-18 | 1991-08-13 | At&T Bell Laboratories | Perceptual coding of audio signals |
-
1992
- 1992-03-04 DE DE69229627T patent/DE69229627T2/de not_active Expired - Lifetime
- 1992-03-04 WO PCT/US1992/001844 patent/WO1992015986A1/fr active IP Right Grant
- 1992-03-04 CA CA002105387A patent/CA2105387A1/fr not_active Abandoned
- 1992-03-04 JP JP04508295A patent/JP3130934B2/ja not_active Expired - Lifetime
- 1992-03-04 EP EP92908518A patent/EP0574523B1/fr not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| WO1992015986A1 (fr) | 1992-09-17 |
| EP0574523B1 (fr) | 1999-07-21 |
| DE69229627T2 (de) | 1999-12-02 |
| JPH06506330A (ja) | 1994-07-14 |
| JP3130934B2 (ja) | 2001-01-31 |
| DE69229627D1 (de) | 1999-08-26 |
| EP0574523A4 (fr) | 1995-03-01 |
| EP0574523A1 (fr) | 1993-12-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |