| US 7,542,899 B2 | ||
| Method and apparatus for adjusting the level of a speech signal in its encoded format | ||
| Walter Etter, Wayside, N.J. (US) | ||
| Assigned to Alcatel-Lucent USA Inc., Murray Hill, N.J. (US) | ||
| Filed on Sep. 30, 2003, as Appl. No. 10/674,721. | ||
| Prior Publication US 2005/0071155 A1, Mar. 31, 2005 | ||
| Int. Cl. G10L 19/14 (2006.01); G10L 11/00 (2006.01); G10L 19/00 (2006.01) | ||
| U.S. Cl. 704—225 [704/200; 704/201] | 9 Claims |
| 1. A method for modifying the level of a speech signal, wherein the speech signal is encoded as a bit stream, the method comprising:
using a processor changing a fixed codebook gain index in the encoded speech signal by
maintaining the fixed codebook gain index at a first index increment value for a first portion of a cycle period; and
incrementing the fixed codebook gain index to a second index increment value for the remaining portion in that cycle period,
so that the increment in fixed codebook gain index is variable and temporally dispersed.
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