BROWSE
Detail
Registered An Efficient Pulse Replacement Method for Fixed Codebook Search of ACELP Speech C odec
- Inventors
- Lee Eung Don, Do Young Kim
- Application No.
- 12767271 (2010.04.26)
- Publication No.
- 20100211386 (2010.08.19)
- Registration No.
- 8185385 (2012.05.22)
- Country
- UNITED STATES
- Project Code
- 02MT2100, Development of Next Generation High-Quality VolP Core Technology, Kim Bong Tae
- Abstract
- The present research can decrease the amount of computation and enhance speech quality by using a global pulse replacement method in a fixed codebook search. The fixed codebook search method in a speech encoder based upon global pulse replacement, includes the steps of: (a) computing absolute values of the pulse-position likelihood-estimator vectors; (b) temporarily obtaining a codebook vector; (c) computing a mathematical equation by replacing a pulse; (d) determining whether a value computed based upon the mathematical equation is increased after pulse replacement; (e) obtaining a new codebook vector by replacing the pulse; and (f) maintaining a previous codebook vector.