Claims
- 1. A speech coding method, which comprises:
coding a speech signal by a combination of speech parameters and excitation signals; describing the speech parameters or excitation signals by vectors; forming the vectors by superposing at least two tracks, wherein at least one track has at least two vector elements different from zero; and coding algebraic signs of the vector elements that differ from zero independently of one another and independently of the positions of the vector elements that differ from zero.
- 2. The method according to claim 1, which comprises forming one of the speech parameters and the excitation signals from the speech signals on the CELP principle.
- 3. The method according to claim 1, which comprises coding the positions of the vector elements that differ from zero together to form an index value.
- 4. A device for speech coding, comprising an input for receiving a speech signal, and a processor unit connected to said input and configured to:
code a speech signal by a combination of speech parameters and excitation signals; describe the speech parameters or excitation signals by vectors; form the vectors by superposing at least two tracks; define at least one track with at least two vector elements that differ from zero; and code an algebraic sign of the vector elements that differ from zero independently of one another and independently of positions of the vector elements that differ from zero.
- 5. The device according to claim 4, wherein said processor unit is programmed to obtain the speech parameters and excitation signals from the speech signals on the CELP principle.
- 6. The device according to claim 4, wherein said processor unit is programmed to code the positions of the vector elements that differ from zero together to form an index value.
Priority Claims (1)
Number |
Date |
Country |
Kind |
98 109 868.4 |
May 1998 |
EP |
|
CROSS-REFERENCE TO RELATED APPLICATION
1. This is a continuation of copending International Application PCT/EP99/03766, filed May 31, 1999, which designated the United States.
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/EP99/03766 |
May 1999 |
US |
Child |
09725345 |
Nov 2000 |
US |