From: An efficient algebraic codebook search for ACELP speech coder
Methods | Search accuracy for locating various numbers of intended pulses (%) | |||||
---|---|---|---|---|---|---|
1 pulse | 2 pulses | 3 pulses | 4 pulses (all right) | 0 pulse (all wrong) | ||
G.729A | 98.3475 | 92.1456 | 80.9918 | 68.6438 | 1.6525 | |
GPR | R = 1 | 98.7032 | 90.7750 | 76.1053 | 55.0718 | 1.2968 |
R = 2 | 98.4946 | 91.8335 | 80.4779 | 76.1053 | 1.5054 | |
R = 3 | 98.5246 | 92.1081 | 81.2227 | 80.4779 | 1.4754 | |
R = 4 | 98.5283 | 92.1547 | 81.3393 | 81.2227 | 1.4717 | |
IFPR | 98.6810 | 92.4963 | 80.0048 | 68.0824 | 1.3190 | |
RCM | N = 1 | 99.3295 | 89.0873 | 55.8720 | 17.3353 | 0.6705 |
N = 2 | 98.3009 | 90.8486 | 73.6532 | 50.3579 | 1.6991 | |
N = 3 | 98.8545 | 94.0394 | 83.5763 | 70.7329 | 1.1455 | |
N = 4 | 99.2014 | 95.9617 | 89.2187 | 81.8716 | 0.7986 | |
Proposed method | N = 1 | 99.3295 | 89.0873 | 55.8720 | 17.3353 | 0.6705 |
N = 2 | 98.2054 | 89.8500 | 70.0755 | 44.0814 | 1.7946 | |
N = 3 | 98.2060 | 91.2376 | 76.7365 | 60.2498 | 1.7940 | |
N = 4 | 98.2369 | 92.1541 | 80.4684 | 69.0717 | 1.7631 |