DE69420200D1 - CELP Koder-Dekoder - Google Patents
CELP Koder-DekoderInfo
- Publication number
- DE69420200D1 DE69420200D1 DE69420200T DE69420200T DE69420200D1 DE 69420200 D1 DE69420200 D1 DE 69420200D1 DE 69420200 T DE69420200 T DE 69420200T DE 69420200 T DE69420200 T DE 69420200T DE 69420200 D1 DE69420200 D1 DE 69420200D1
- Authority
- DE
- Germany
- Prior art keywords
- celp encoder
- encoder decoder
- decoder
- celp
- encoder
- 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
- 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
- G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
- G10L19/09—Long term prediction, i.e. removing periodical redundancies, e.g. by using adaptive codebook or pitch predictor
-
- 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
- G10L2019/0001—Codebooks
- G10L2019/0003—Backward prediction of gain
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)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Analogue/Digital Conversion (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8342693A | 1993-06-28 | 1993-06-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69420200D1 true DE69420200D1 (de) | 1999-09-30 |
DE69420200T2 DE69420200T2 (de) | 2000-07-06 |
Family
ID=22178247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69420200T Expired - Lifetime DE69420200T2 (de) | 1993-06-28 | 1994-06-15 | CELP Koder-Dekoder |
Country Status (6)
Country | Link |
---|---|
US (1) | US5719993A (de) |
EP (1) | EP0631274B1 (de) |
JP (1) | JP3168238B2 (de) |
CA (1) | CA2124713C (de) |
DE (1) | DE69420200T2 (de) |
ES (1) | ES2137325T3 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5774846A (en) | 1994-12-19 | 1998-06-30 | Matsushita Electric Industrial Co., Ltd. | Speech coding apparatus, linear prediction coefficient analyzing apparatus and noise reducing apparatus |
US7072832B1 (en) * | 1998-08-24 | 2006-07-04 | Mindspeed Technologies, Inc. | System for speech encoding having an adaptive encoding arrangement |
US6415255B1 (en) * | 1999-06-10 | 2002-07-02 | Nec Electronics, Inc. | Apparatus and method for an array processing accelerator for a digital signal processor |
US6704701B1 (en) * | 1999-07-02 | 2004-03-09 | Mindspeed Technologies, Inc. | Bi-directional pitch enhancement in speech coding systems |
DE10026904A1 (de) | 2000-04-28 | 2002-01-03 | Deutsche Telekom Ag | Verfahren zur Berechnung des die Lautstärke mitbestimmenden Verstärkungsfaktors für ein codiert übertragenes Sprachsignal |
US7133823B2 (en) * | 2000-09-15 | 2006-11-07 | Mindspeed Technologies, Inc. | System for an adaptive excitation pattern for speech coding |
US7103538B1 (en) * | 2002-06-10 | 2006-09-05 | Mindspeed Technologies, Inc. | Fixed code book with embedded adaptive code book |
US7970605B2 (en) | 2005-01-12 | 2011-06-28 | Nippon Telegraph And Telephone Corporation | Method, apparatus, program and recording medium for long-term prediction coding and long-term prediction decoding |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4797925A (en) * | 1986-09-26 | 1989-01-10 | Bell Communications Research, Inc. | Method for coding speech at low bit rates |
DE68916944T2 (de) * | 1989-04-11 | 1995-03-16 | Ibm | Verfahren zur schnellen Bestimmung der Grundfrequenz in Sprachcodierern mit langfristiger Prädiktion. |
US4980916A (en) * | 1989-10-26 | 1990-12-25 | General Electric Company | Method for improving speech quality in code excited linear predictive speech coding |
US5195168A (en) * | 1991-03-15 | 1993-03-16 | Codex Corporation | Speech coder and method having spectral interpolation and fast codebook search |
US5267317A (en) * | 1991-10-18 | 1993-11-30 | At&T Bell Laboratories | Method and apparatus for smoothing pitch-cycle waveforms |
US5327520A (en) * | 1992-06-04 | 1994-07-05 | At&T Bell Laboratories | Method of use of voice message coder/decoder |
-
1994
- 1994-05-31 CA CA002124713A patent/CA2124713C/en not_active Expired - Fee Related
- 1994-06-15 DE DE69420200T patent/DE69420200T2/de not_active Expired - Lifetime
- 1994-06-15 EP EP94304328A patent/EP0631274B1/de not_active Expired - Lifetime
- 1994-06-15 ES ES94304328T patent/ES2137325T3/es not_active Expired - Lifetime
- 1994-06-27 JP JP16583094A patent/JP3168238B2/ja not_active Expired - Lifetime
-
1995
- 1995-12-21 US US08/579,051 patent/US5719993A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2137325T3 (es) | 1999-12-16 |
JP3168238B2 (ja) | 2001-05-21 |
EP0631274A3 (de) | 1996-04-17 |
JPH07168597A (ja) | 1995-07-04 |
US5719993A (en) | 1998-02-17 |
EP0631274B1 (de) | 1999-08-25 |
CA2124713C (en) | 1998-09-22 |
CA2124713A1 (en) | 1994-12-19 |
DE69420200T2 (de) | 2000-07-06 |
EP0631274A2 (de) | 1994-12-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |