CA2193345A1 - Speech encoding and decoding capable of improving a speech quality - Google Patents
Speech encoding and decoding capable of improving a speech qualityInfo
- Publication number
- CA2193345A1 CA2193345A1 CA 2193345 CA2193345A CA2193345A1 CA 2193345 A1 CA2193345 A1 CA 2193345A1 CA 2193345 CA2193345 CA 2193345 CA 2193345 A CA2193345 A CA 2193345A CA 2193345 A1 CA2193345 A1 CA 2193345A1
- Authority
- CA
- Canada
- Prior art keywords
- speech signal
- speech
- encoding
- encoded
- intensity
- 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
- 230000003044 adaptive effect Effects 0.000 abstract 3
- 230000003595 spectral effect Effects 0.000 abstract 3
- 230000009466 transformation Effects 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
Landscapes
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
In an encoding/decoding device operable in response to an input speech signal by means of an adaptive transform coding to produce an output encoded speech signal, the input speech signal is encoded by a speech analyzer section into encoded speech signal data by means of an adaptive orthogonal transformation, and the encoded speech signal data is decoded into an output speech signal by a speech synthesis section.
The speech analyzer section includes a spectral envelope intensity estimating means for estimating intensity of a spectral envelope of the input speech signal, and includes means for encoding frequency components into which the speech signal is decomposed by the adaptive orthogonal transformation with phase information selectively removed from a part of the frequency components, the encoding being based on the intensity of the spectral envelope intensity estimating means. The speech synthesizer section includes means for assigning pseudo-phase information to each of the frequency components from which the phase information is selectively removed.
The speech analyzer section includes a spectral envelope intensity estimating means for estimating intensity of a spectral envelope of the input speech signal, and includes means for encoding frequency components into which the speech signal is decomposed by the adaptive orthogonal transformation with phase information selectively removed from a part of the frequency components, the encoding being based on the intensity of the spectral envelope intensity estimating means. The speech synthesizer section includes means for assigning pseudo-phase information to each of the frequency components from which the phase information is selectively removed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP341429/1991 | 1991-12-24 | ||
| JP03341429A JP3144009B2 (en) | 1991-12-24 | 1991-12-24 | Speech codec |
| CA002085384A CA2085384C (en) | 1991-12-24 | 1992-12-15 | Speech encoding and decoding capable of improving a speech quality |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2193345A1 true CA2193345A1 (en) | 1993-06-25 |
| CA2193345C CA2193345C (en) | 1999-09-28 |
Family
ID=25675744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002193345A Expired - Fee Related CA2193345C (en) | 1991-12-24 | 1992-12-15 | Speech encoding and decoding capable of improving a speech quality |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2193345C (en) |
-
1992
- 1992-12-15 CA CA002193345A patent/CA2193345C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2193345C (en) | 1999-09-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |