CA2618002A1 - Algebraic codebook with signal-selected pulse amplitudes for fast coding of speech - Google Patents
Algebraic codebook with signal-selected pulse amplitudes for fast coding of speech Download PDFInfo
- Publication number
- CA2618002A1 CA2618002A1 CA002618002A CA2618002A CA2618002A1 CA 2618002 A1 CA2618002 A1 CA 2618002A1 CA 002618002 A CA002618002 A CA 002618002A CA 2618002 A CA2618002 A CA 2618002A CA 2618002 A1 CA2618002 A1 CA 2618002A1
- Authority
- CA
- Canada
- Prior art keywords
- amplitude
- pulse
- positions
- codebook
- zero
- 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.)
- Granted
Links
- 230000005236 sound signal Effects 0.000 abstract 2
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
- G10L19/10—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a multipulse excitation
- G10L19/107—Sparse pulse excitation, e.g. by using algebraic codebook
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computational Linguistics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Algebra (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
The present invention relates to a method and device for conducting a search in a codebook. This codebook consists of a set of pulse amplitude/position combinations each defining a number L of positions p and comprising both zero-amplitude pulses and non-zero-amplitude pulses assigned to respective positions p = 1, 2, ...L of the combination. Also, each non-zero-amplitude pulse assumes one of q possible amplitudes. According to the method, the positions p of the non-zero-amplitude pulses of the combinations of the codebook are restrained in accordance with a set of tracks of pulse positions, the pulse positions of each track being interleaved with the pulse positions of the other tracks. A subset of pulse amplitude/position combinations is pre-selected from the codebook in relation to the sound signal, and only this subset of pulse amplitude/position combinations is searched to thereby reduce the complexity of the search. Pre-- selecting a subset of pulse amplitude/position combinations comprises pre--establishing, in relation to the sound signal, an amplitude/position function S p pre-assigning to the positions p = 1, 2, ...L valid amplitudes out of the q possible amplitudes. And the searching comprises searching only the pulse amplitude/position combinations of the codebook having non-zero-amplitude pulses which satisfy the pre-established function S p.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US38396895A | 1995-02-06 | 1995-02-06 | |
| US08/383,968 | 1995-02-06 | ||
| US08/508,801 | 1995-07-25 | ||
| US08/508,801 US5754976A (en) | 1990-02-23 | 1995-07-28 | Algebraic codebook with signal-selected pulse amplitude/position combinations for fast coding of speech |
| PCT/CA1996/000069 WO1996024925A1 (en) | 1995-02-06 | 1996-02-02 | Algebraic codebook with signal-selected pulse amplitudes for fast coding of speech |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2618002A1 true CA2618002A1 (en) | 1997-08-03 |
| CA2618002C CA2618002C (en) | 2001-08-21 |
Family
ID=39264252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002618002A Expired - Lifetime CA2618002C (en) | 1995-02-06 | 1996-02-02 | Algebraic codebook with signal-selected pulse amplitudes for fast coding of speech |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2618002C (en) |
-
1996
- 1996-02-02 CA CA002618002A patent/CA2618002C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2618002C (en) | 2001-08-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20160202 |